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Home My WebLink AboutMITIGATION FILE #5WZl ,.c. December 5, 1995 Ms. Dolores Gough Kern County Environmental Health Services Department 2700 "M" Street, Suite 300 Bakersfield, California 93301. . Enclosed please find ~) copies of the Problem Assessment Report for Hydrocarbon Contaminated Soil and Groundwater for the Leo Black Estate Property at 3909 Pierce Road. Bakersfield, California, Groundwater samples, collected from the four monitoring wells installed at the site contained hydrocarbon concentrations which were below detection limits for all constituents analyzed. WZl recommends that the monitoring wells should be sampled quarterly until four successive quarters of monitoring indicate hydrocarbon constituents below detection limits and the groundwater portion of the site assessment should be closed at that time. Please do not 'hesitate to contact me if you have any questions. Very truly yours, · Allen Waggoner / taft Geologist JAW/er Enclosure 02060010,O35 4700 Si'OCKDALE HIGHWAY, SUITE 120 BAKERSFIELD, CALIFORNIA 93309 (805) 326-1112 FAX: (805) 326-0191 zil00 WESTHE~MER, SU'~TE 231 HOUSTON, TEXAS 77027 (713) 877-1149 FAX: (713) 877'1923 WZl ,.c. LEO BLACK ELECTRIC PROBLEM ASSESSMENT REPORT FOR HYDROCARBON CONTAMINATED SOIL AND GROUNDWATER 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA December 4, 1995 Prepared for: Leo Black Estate c/o Ms. Donna Roberts 1004 Lorene Avenue Oildale, California 93308 Prepared by: WZl Inc. 4700 Stockdale Highway, Suite 120 Bakersfield, California 93309 02060010.032 ~~J Expiration Date: 03/30/96 4700 STOCKDAI. E HIGHWAY, SUITE ~20 BAKERSFIELD, CAUFORN~A (~330(~ (805) 326-]] ~2 FAX: (805) 326-0] 4]00 WESTHEIMER, SUITE 23~ HOUSTON, TEXAS 77027 (7] 3) 877-] ]4(,~ FAX: (7~ 3) 877-~ (~23 TABLE OF CONTENTS PaRe 1.0 EXECUTIVE SUMMARY ...................................... 1 2.0 INTRODUCTION ............................................ 4 3.0 SITE DESCRIPTION ......................................... 6 3.1 Ownership ...................................... 6 3.2 Site Location .................................... 6 3.3 Surrounding Properties ............................. 6 4.0 PREVIOUS SITE INVESTIGATIONS .............................. 7 4.1 1987 WZI Preliminary Site Soil Characterization ....... ~... 7 4.2 1991 WZI Soil Excavation ........................... 8 4.3 1993 WZI Soil Excavation ........................... 8 4.4 Additional Investigations ............................ 10 5.0 REGIONAL GEOLOGIC AND HYDROGEOLOGIC SE'I-rING ............ 12 5.1 Regional Geologic Setting ........................... 12 5.2 Regional Hydrogeology ............................ 12 6.0 HYDROCARBON CONTAMINATED SOIL STOCKPILED ON-SITE ........ 14 6.1 Sampling of Soil Stockpiled On-Site ................... 14 6.2 Analytical Results ' 14 6.3 Excavation Backfill ................................ 15 7.0 GROUNDWATER SITE ASSESSMENT ............................ 16 , 7.1 Monitoring Well Installation .......................... 16 7.2 Monitoring Well Development ........................ 17 7.3 Soil Sampling and Analysis ............................. 17 7.4 Groundwater Sampling and Analyses .................. 19 8.0 CONCLUSIONS AND RECOMMENDATIONS ....................... 21 8.1 Conclusions ..................................... 21 8.2 Recommendations ................................ 22 9.0 REFERENCES CITED ........................................ 23 EXHIBITS Exhibit 1 Location Map Exhibit 2 Site Activity Map Depicting Previous Excavation and Soil Boring Locations on Leo Black Estate and Reed Properties Exhibit 3 Detailed Map of Underground Storage Tank Site Exhibit 4 Cross Sections A-A', B-B' Exhibit 5 Site Plan with Monitoring Wells, Cr, oss Sections, Aeration Pile and Sample Locations - Exhibit 6 Regional Geologic Map Exhibit 7 Regional Depth to Groundwater Map Exhibit 8 Regional Groundwater Elevation Map Exhibit 9 Site Specific Groundwater Elevation Map TABLES Table 1 Laboratory Analyses Summary - Soils Stockpiled on Remediation Pads Table 2 . Well Development - Water Characteristic Data Table 3 Laboratory Analyses Summary - Soil Samples Collected .During Monitoring Well Drilling Table 4 Groundwater Sampling - Water Characteristic Data Table 5 Laboratory Analyses Summary - Water Samples from Mon!toring Wells APPENDICES Appendix I Agency Correspondence Appendix II Chain of Custody Documents Appendix Ill Laboratory Analytical Results for Soils Stockpiled on Remediation Pads Appendix IV Monitoring Well Permits Appendix V ' Monitoring Well Boring Logs Appendix VI Laboratory Analytical Results for Soil Samples Collected from Boreholes and Drummed Cuttings Appendix VII Laboratory Analytical Results for Groundwater Samples 1.0 EXECUTIVE SUMMARY WZI Inc. conducted a soil and groundwater hydrocarbon contamination site characterization investigation for the Leo Black Estate property located at 3909 Pierce Road, Bakersfield, California. The subject property encompasses approximately 0.92 acres and consists of three contiguous parcels which are reported on Kern County Assessors Parcel Numbers 332- 083-3, 332-083-5 and 332-083-7. The property ' contains one metal building, and was previously occupied by Leo Black Electric, a business which sold and repaired electrical motors and associated equipment. A 500 gallon underground gasoline storage tank was removed from the site in 1987 and hydrocarbon contaminated soil was discovered' beneath the tank site. Previous Investiqations A preliminary site soil characterization was conducted by WZI in July, 1987. Five soil 'borings were advanced to depths of approximately 15 feet below ground surface and hydrocarbon contamination was encountered to that depth. The soil borings were not advanced to greater depths as groundwater was encountered at 15 feet below ground surface. A workplan was prepared by WZl'in.1990 to delineate the ve~ical and lateral extent of the' . soil hydrocarbon contamination. Approximately 2700 cubic yards of soil was excavated from the site during January, 1991. Approximately 660 cubic yards of the excavated soil was considered hydrocarbon contaminated and was stockpiled on a remediation pad. Analytical results of soil samples collected from the bottom and sidewalls of the excavation indicated that hydrocarbon contamination was still present in the subsurface. 02060010.032 1 'An amended workplan was prepared in 1993 and additional excavation was conducted to remove the remaining hydrocarbon contaminated soil from the Leo Black Estate Property and the adjoining Reed property located immediately to the north. A total of approximately 3000 cubic yards of soil was removed during the 1993 excavation and approximately 1000 yards of this soil contained hydrocarbon contamination. The hydrocarbon contaminated soil was stockpiled on the remediation pads constructed on- site. Contaminated soil was excavated to a depth of 45 feet below ground surface where groundwater was encountered. The groUndwater appeared to have a brown color, strong petroleum odor and petroleum sheen on the surface. WZl concluded that all significant hydrocarbon contaminated soil had been removed. The Kern County Environmental Health Services Department (KCEHSD) concurred and no additional excavation was required. In addition to investigations conducted on the Leo Black Estate property, two 8,000 gallon gasoline and diesel underground storage tanks were removed from the southern area of the Reed property in September 1991, immediately north of the Leo Black Estate site. A closure letter was issued for the Reed property by the Bakersfield City Fire Department in October, 1991 and no further action was required. Interim Remedial Action A total of six samples were collected in June, 1995 from soils stockpiled on the remediation pads. Concentrations of Total Petroleum Hydrocarbons as gasoline (TpHG) and benzene, toluene, ethylbenzene and xylene (BTEX) were all reported as being below detection limits. Analysis for Total Petroleum Hydrocarbons as diesel (TPHD) indicated Iow levels of diesel and motor oil contamination ranging from 5 to 39 parts per million (ppm). These concentrations are interpreted to be associated with minor hydrocarbon surface staining. Permission was granted by KCEHSD to use the stockpiled soil as backfill. The excavation was backfilled using the stockpiled soil and imported fill. 02060010.032 2 Monitorinq Well Installation Four groundwater monitoring wells (MW-1 through MW-4) were drilled on the property to a depth of 40 feet below ground surface during September, 1995. The soil lithologies encountered during the drilling of each well were documented by a WZI geologist and the wells were completed using 2 inch (ID) schedule 40 PVC with the lower 30 feet containing 0.010 inch diameter machine slots. Groundwater was encountered at a depth of approximately 15 feet below ground surface during the drilling of each well. Laboratory analyses for TPHG, TPHD and BTEX were conducted on soil samples collected from a depth of approximately 15 feet below ground surface in wells MW-3 and MW-4 as well as on a grab sample of the drill cuttings from each well. Concentrations of TPHG and BTEX were reported as being below detection limits for all the samples analyzed. Samples of drill cuttings from wells MW-l, MW-2 and MW-4 contained Iow levels of TPHD as diesel and motor oil ranging from 15 mg/kg to 55 mg/kg. These concentrations are interpreted to be associated with minor surface hydrocarbon contamination and KCEHSD granted permission to spread the drill cuttings on the surface of the site. Groundwater samples were collected from each well and analyzed for TPHG, TPHD and BTEX. Concentrations of TPHG, TPHD and BTEX were all reported as being below detection limits for each of the groundwater samples. No additional soil investigation or excavation is recommended for the subject property. Groundwater monitoring wells should be sampled quarterly until four successive quarters of monitoring indicate hydrocarbon constituents below detection limits. 02060010.032 3 V~ZJ ~c 2.0 INTRODUCTION WZI Inc. has completed a soil and groundwater hydrocarbon contamination site characterization investigation for the Leo Black Estate property located at 3909 Pierce Road, Bakersfield, California. The property is part of the Leo Black Estate which is administered by Mr. Tom Gilbert and Ms. Donna Roberts. The property was formerly the site of Leo Black Electric, a commercial/industrial business which sold and repaired electrical motors and associated equipment. A 500 gallon underground gasoline storage tank was removed from the site in 1987 and hydrocarbon contaminated soil was found to be present. Hydrocarbon contaminated soils were excavated from the site during previous remedial action operations conducted in 1991 and 1993 and hydrocarbon contaminated groundwater was discovered beneath the site in 1993. No groundwater site characterization was recommended to be conducted for the Leo Black Estate property at the time the WZI report was prepared based on the knowledge that an area of approximately 25 square miles of this portion of the city of Bakersfield is underlain by contaminated groundwater from a number of significant industrial sources which include nearby oil refineries. The California Regional Water Quality Control Board- Central Valley Region (CRWQCB-CVR) was petitioned by counsel representing the Leo Black Estate to release the Leo Black Estate from having to conduct the groundwater portion of the site characterization because of the area-wide groundwater problem. The 2 petition was based on the precept that the Leo Black Estate was a very minor contributor, if any, to the regional degradation of the groundwater compared to the significantly larger_. .1 potential source points in the vicinity such as oil refineries. The CRWQCB-CVR staff elected to not issue a waiver to excuse the Leo Black Estate from conducting a groundwater site assessment of the property. In correspondence J dated February 9, 1995 (Appendix I), Kern County Environmental Health Services Department instructed the Leo Black Estate to proceed with the groundwater phase of the site characterization. A workplan was prepared by WZI outlining the scope of work I 02060010.032 4 I for a final soil and groundwater site assessment investigation and submitted to KCEHSD in February, 1995. The workplan was approved by KCEHSD in correspondence dated April 10, 1995 (Appendix I). This report outlines the soil and groundwater site assessment work and soil remediation results of the hydrocarbon contaminated soil that was previously stockpiled at the site. In this examination, WZl has assumed the legal capacity of all legal persons, the genuineness of all signatures, the authenticity of all documents submitted to WZl as originals, the conformity to original documents of all documents submitted to WZI as certified, photostatic copies, or telecopies, and the authenticity of the originals. In examining of documents, WZI assumed that all parties had the power, governmental or otherwise, to enter into and perform all obligations under such documents, have further assumed the due authorization by all requisite action, governmental or otherwise, of the execution and delivery by all parties of such documents, and have further assumed the validity and binding effect of such documents against all parties in accordance with the terms thereof. As to any facts, material to the opinions expressed herein which were not independently established or verified by WZI, oral or written statements and representations of the Leo Black Estate and its representatives were relied upon. Unless otherwise stated, WZI has not made independent investigation or inquiry into the accuracy or completeness of the documents and information supplied to WZI. The members, of WZl are State of California .Registered Environmental 'Assesso.rs .... Registered Engineers and Certified Engineering Geologists. WZl expresses no opinion as to disciplines, subjects and practice areas outside those specifically enumerated in the first sentence of this paragraph. Further, WZI expresses no opinion herein as to any matters of California law or federal law. 02060010.032 5 3.0 SITE DESCRIPTION 3.1 Ownership The property is owned by the Leo Black Estate. The Leo Black Estate is administered by Mr. Tom Gilbert and Ms. Donna Roberts. 3.2 Site Location The property is located at 3909 Pierce Road, in the city of Bakersfield, California (Exhibit 1). The property encompasses approximately 0.92 acres within Section 23, Township 29 South, Range 27 East, Mount Diablo Base and Meridian. The property is reported on Kern County Assessors Parcel Numbers 332-083-3, 332-083-5 and 332-083- 7. 3.3 Surrounding Properties The property is located immediately to the east of State Highway 99 in a predominantly industrial/commercial area. The site is bounded to the east by Pierce Road and to the north by a vacant lot. Prior to being vacant, the property immediately to the north of the site was utilized as a truck refueling facility. Two houses and a shop area are located immediately to the south of the site. Numerous businesses are located near the Leo Black Estate site which are known or potential sources for soil and/or groundwater contamination. These include petroleum refineries and diesel truck maintenance and refueling operations. 02060010.032 6 4.0 PREVIOUS SITE INVESTIGATIONS A 500 gallon underground gasoline storage tank was installed in the northeast corner of the property, immediately adjacent.to the northern property boundary in 1956. The tank was taken out of operation in 1985 when Leo Black Electric discontinued operations. The tank was removed by McNabb Construction on February 10, 1987 and significant hydrocarbon contamination was found at depths of 2 and 5 feet beneath the base of the tank. A site characterization workplan was then requested by KCEHSD to be prepared for both soil and groundwater. 4.1 1987 WZl Preliminary Site Soil Characterization WZI conducted a preliminary site soil characterization during July, 1987. A copy of the report of this investigation was provided to KCEHSD. Five soil borings were advanced to a depth of approximately 15 feet below ground surface in the immediate vicinity of the former underground storage tank location. Soil samples collected from the borings were analyzed for total volatile hydrocarbons, benzene, toluene, ethylbenzene and xylene. In addition, the soil samples were analyzed for oil and grease content. The soil samples were submitted to a California certified analytical laboratory for analyses. Analytical results reported for the soil samples indicated the presence of hydrocarbon constituents at maximum levels as follow: total volatile hydrocarbons (10,075 mg/kg); benzene (31.55 mg/kg); toluene (909 mg/kg); ethylbenzene (323 mg/kg); xylene (2,005 mg/kg); and oil and grease (858 mg/kg). _The soil borings indicated that approximately 600 cubic Yards_ of hydrocarbon contaminated soil were present in the subsurface beneath the former underground storage tank location to a depth of at least 15 feet below ground surface. The soil borings were not. advanced to any greater depth because groundwater was encountered at approximately 15 feet below ground surface. This depth to groundwater is consistent with Kern County Water Agency (KCWA) reports for the period of 1986 02060010.032 7 ~l which indicated very shallow groundwater to be located in this portion of the city of Bakersfield (KCWA, 1987). 4.2 1991 WZI Soil Excavation A workplan to delineate the vertical and horizontal extent of the soil hydrocarbon contamination on the Leo Black Estate property was developed by WZI in 1990. This workplan was designed to remove the identified contaminated soil by excavation and at the same time complete the delineation of the vertical and horizontal extent of the hydrocarbon contaminated soil. An attempt was made at that time to gain access to the property located immediately north of the site which was then owned by Grossman's Inc. with the intent of evaluating the presence of hydrocarbon contamination that may have extended onto the property from the Leo Black Estate site. No access agreement was made between the parties. Approximately 2,700 cubic yards of soil was excavated from the subsurface of the Leo Black Estate property during January, 1991. Approximately 660 cubic yards of the .excavated soil was considered to be contaminated by hydrocarbon compounds. The hydrocarbon contaminated soil was stockpiled on a remediation pad located on the west end of the parcel. The remaining clean soil was stockpiled adjacent to the excavation. Analytical results from soil samples obtained from the sidewalls and bottom of the 'excavation indicated that additional hydrocarbon contaminated soil was still present within the subsurface ............ 4.3 1993 WZl Soil Excavation An amended site characterization workplan was submitted to KCEHSD during 1993 to remove the remaining hydrocarbon contaminated soil from the Leo Black Estate property and the adjoining Reed property (formerly Grossman's Inc.) located immediately to the north. This workplan was approved during March, 1993 and an agreement was made 0206001o.032 8 between the Leo Black Estate and the owners of the Reed property to allow access for excavation and ri~medial action operations. All of the hydrocarbon contaminated soil removed during the 1991 remedial action was sampled for hydrocarbon content. All soil samples from the remediation pad were reported to be below analytical detection limits. Approval was granted from KCEHSD to use the remediated soil as backfill for future operations. The additional excavation of hydrocarbon contaminated soil was conducted by WZI between July 26 and August 6, 1993. The maximum areal extent of the excavation extended approximately 30 feet north of the property line onto the Reed parcel. A total of 3,000 cubic yards of clean and hydrocarbon contaminated soil was removed during the 1993 excavation effort. Approximately 1,000 yards of this soil consisted of hydrocarbon contaminated soil. This soil was removed from the excavation and stockpiled on remediation pads constructed on the Leo Black Estate property. The vertical extent of the hydrocarbon contaminated soil was found to be present from approximately 15 feet below ground surface to a maximum depth of 45'feet below ground surface immediately below the former underground storage tank location. Analytical results from the soil samples collected from the deeper portions of the 1993 excavation were reported to have the following hydrocarbon constituents: total petroleum hydrocarbon as gasoline (430 mg/kg); benzene (below analytical detection limits); toluene (below analytical detection limits); ethyibenzene (below analytical detection limits); and xylene (below analytical detection limits).. In addition, total petroleum hydrocarbon as diesel fuel at maximum concentrations of 680 mg/kg. was reported Groundwater was present in the bottom of the excavation at a depth of approximately 45 feet below ground surface. The water appeared to have a brown color with a petroleum sheen on the surface and a strong hydrocarbon odor. A single grab sample of the groundwater was collected. Analytical results from the groundwater sample were reported to contain the following hydrocarbon constituents: total petroleum hydrocarbon 02060010.032 9 as diesel fuel (2,300 pg/I); benzene (below analytical detectiOn limits); toluene (below analytical detection limits); ethylbenzene (below analytical detection limits); xylene (280 pg/I); and total petroleum hydrocarbons as gasoline (2,300 pg/I). The 1993 WZI report concluded that all significant hydrocarbon contaminated soil had been removed from the subsurface of the Leo Black Estate property and the adjoining portion of the Reed parcel. The KCEHSD concurred with this assessment in correspondence dated September 30, 1993 (Appendix I), and no additional soil excavation was required. The locations of the 1987 soil borings and limit of the 1993 soil excavation are shown on Exhibit 2. The location and analytical results of the soil samples collected during all of the investigative efforts are depicted on Exhibit 3. Analytical results and the projected limits of the original subsurface gasoline contamination are depicted on the cross-sections, Exhibit 4. The cross-section locations are depicted on the Site Plan, Exhibit 5. 4.4 Additional Investigations In addition to the numerous groundwater contamination source sites in the vicinity of the Leo Black Estate property, it was discovered during 1994 by WZI personnel that the adjoining Reed parcel, then owned by Grossman's Inc. was the former site of a truck refueling facility and had also been the subject of at least one soil and groundwater site investigation. WZI personnel discovered in 1994 that Krazan and Associates had drilled four soil and one monitoring well on the Reed parcel during August, borings temporary 1991. Two additional borings were drilled on the Reed parcel by Krazan and Associates in September, 1991. The locations of the soil borings and temporary monitoring well drilled by Krazan and Associates are depicted on Exhibit 2. 02060010.032 10 The analytical results for the soil samples and groundwater sample collected from the boreholes drilled by Krazan and Associates indicated hydrocarbon concentrations that were below detection limits except for two samples which contained minor oil and grease concentrations of 43 ppm and 24 ppm at a depth of 20 feet below ground surface. The temporary monitoring well was abandoned prior to July, 1993. Two 8,000 gallon gasoline and diesel underground storage tanks were removed from the subsurface of the Reed parcel on September 27, 1991 by Kern Environmental Services under the direction of AquaGeosciences Inc. and under the oversight of the Bakersfield City Fire Department. Analytical results from soil samples obtained from under the tanks located on the Reed parcel were either below detection limits for hydrocarbon constituents or were reported to be below 1 mg/kg. A closure letter was issued by the City of Bakersfield Fire Department to Grossman's Inc. on October 7, 1991 based on the analytical data. No further action was required to be taken by Grossman's Inc. 02060010,032 11 5.0 REGIONAL GEOLOGIC AND HYDROGEOLOGIC SE'l-rING 5.1 Regional Geologic Setting The site is located within the Kern River alluvial fan system. The area is underlain by up to 3000 feet of the Kern River Formation which is comprised of a series of gravels, sands, silts and clays of Plio-Pleistocene age. The terrain is essentially flat with an average elevation of approximately 405 feet above sea level. The regional geology in the vicinity ., of the site is shown on Exhibit 6. The soil lithology directly beneath the site consists of medium to coarse grain sand with minor silt and pebbles. 5.2 Regional Hydrogeology During the site investigation conducted in July, 1987, groundwater was encountered at a depth of approximately 15 feet below ground surface in boreholes. During the excavation of July - August, 1993, groundwater was reached at a depth of approximately 45 feet below ground surface. The drop in groundwater levels during this time period is compatible with the regional drop due to drought conditions. The regional depth to groundwater and groundwater elevation above sea level for this time period are shown on Exhibits 7 and 8. The regional direction of groundwater flow in the area of the site is to the west and northwest at that time. The groundwater flow direction varies depending Upon recharge from the Kern River, recharge ponds and withdrawal from groundwater wells. Groundwater was encountered at a depth of approximately 15 feet below ground level beneath the site during the installation of four groundwater monitoring wells in September, 1995. The rise in groundwater levels since the 1993 excavation at the site is probably due to increased precipitation, and several sources of groundwater recharge near the site including the Kern River located approximately 3000 feet to the southeast, the Kern 02060010.032 12 County Water Agency storage ponds located approximately 2000 feet to the northwest and the Calloway Canal located approximately 800 feet to the north. According to water levels measured in the groundwater monitoring wells installed in September, 1995, the direction of groundwater flow beneath the site is to the southwest (Exhibit 9). 02060010.032 13 6.0 HYDROCARBON CONTAMINATED SOIL STOCKPILED ON-SITE 6.1 Sampling of Soil Stockpiled On-Site Approximately 3000 cubic yards of clean and hydrocarbon contaminated soil was removed during the 1993 excavation effort. Approximately 1000 yards of this soil was contaminated with hydrocarbons. The hydrocarbon contaminated soil was removed from the excavation and stockpiled on two remediation pads which were constructed on the Leo Black Estate property. The remaining soil was used to backfill the excavation. A total of six soil samples were collected from the remediation pads on June 22, 1995. Four samples were collected from the remediation pad located in the northwest area of the site and two samples were collected from the remediation pad located adjacent to the building in the central area of the site. The sample locations are shown on Exhibit 5. Soil samples were collected for chemical analysis in brass tubes, each 2 1/2 inches in diameter and 6 inches long. The sample tubes were labeled and the ends covered with aluminum foil, caped with plastic and secured with plastic tape. The samples were stored on ice pending delivery with Chain of Custody documents (Appendix II) to Sherwood Laboratories in Hilmar, California, a California certified laboratory. 6,2 Analytical Results Soil samples collected from the remediation pads at the site were analyzed for the. following: 02060010.032 14 Analysis. Method Total Petroleum Hydrocarbons as Gasoline (TPHG) (EPA Method 8015M) Total Petroleum Hydrocarbons as Diesel (TPHD) (EPA Method 8015M) Benzene, Toluene, Ethylbenzene, Xylene (BTEX) (EPA Method 8020) In addition, two samples were analyzed for soluble lead. Laboratory analytical results of the soil sampl.es collected on June 22, 1995 are presented in Appendix III and summarized on Table 1. Concentrations of TPHG and BTEX for all six samples were reported as being below detection limits. The analysis for TPHD indicated Iow levels of diesel and motor oil contamination ranging from 5 to 39 ppm. These concentrations are interpreted to be associated with minor hydrocarbon surface staining. Concentrations of soluble lead were below hazardous levels for the two samples analyzed. The laboratory analyses for the stockpiled soil were forwarded to KCEHSD and permission was granted by KCEHSD to use the stockpiled soil as backfill in a correspondence dated July 10, 1995 (Appendix I). 6.3 Excavation Backfill Backfilling of the remaining excavation at the site was conducted by general contractor Gerald Smith of Bakersfield, California. On-site soils which were stockpiled on the remediation pads were used as backfill material and additional soil was imported to the site to complete the backfill operation. 02060010.032 15 7.0 GROUNDWATER SITE ASSESSMENT 7.1 Monitoring Well Installation Four groundwater monitoring wells (MW-1 through MW-4) were drilled to a total depth of 40 feet below ground surface on September 20 and 21, 1995. Prior to drilling, well permits were obtained from KCEHSD (Appendix IV). The locations of the monitoring wells are depicted on Exhibit 5. The wells were drilled and completed by Melton Drilling of Bakersfield, California with a Mobile B-53 drilling rig using 8 inch diameter hollow stem augers. All drill cuffings were placed in steel drums. The soil lithologies encountered during the drilling of each well were documented by a WZI geologist and a log of each borehole was prepared (Appendix V). The boring logs include a record of the lithology penetrated, sample locations, organic vapor meter readings and a detailed well construction diagram. The wells were completed using 2 inch (ID) schedule 40 PVC with the lower 30 feet containing 0.010 inch diameter machine slots. The annular space surrounding the casing was packed with #3 Monterey sand from depths of approximately 40 feet to 7 feet below ground surface. A two foot thick bentonite plug was placed above the sand and the remainder of the annulus of each well was backfilled to the surface with cement. The 'installation of the cement seal for each well was observed and approved by Dolores Gough of KCEHSD. - A cast aluminum utility box was placed over each well head and set in a concrete pad which was constructed to be slightly above the surrounding grade. The utility boxes were secured with watertight steel covers which are held in place with countersunk bolts and each wellhead was fitted with a locking cap. 02060010.032 16 7.2. Monitoring Well Development Following installation, the groundwater monitoring wells were developed utilizing a Failing ~ mud rotary rig. Water was removed from each well by blowing it out of the well bore using compressed air. The wellbore volume was calculated to be approximately 3.7 gallons. A total of approximately 100 gallons of water was purged from each well (27 well volumes). The temperature, conductivity and pH of the purged water was recorded during the well development and is included on Table 2. All water purged from the wells ., was stored on-site in steel drums. Upon completion of the development, the wells were allowed to stand for five days prior to sampling to allow remaining sediment to settle out. 7.3 Soil Sampling and Analysis Soil samples were collected at 5 foot intervals from depths of approximately 5, 10 and 15 feet below ground surface in monitoring well MW-3 because of the proximity to the site ,..~, of two underground storage tanks which were removed from the adjacent property located immediately to the north of the site. Soil samples were also collected at depths of approximately 5, 10 and 15 feet from monitoring well MW-4 as no'subsurface data had previously been collected at this location on the property. Samples were not collected from monitoring well MW-1 as it was drilled and completed in the imported fill. Samples were also not collected from monitoring well MW-2 because of the shallow depth to groundwater and the location of the well outside of the area of . previously excavated contamination. '. The soil samples were obtained from the boreholes using a standard split spoon sampler which was fitted with three brass tubes for collection of undisturbed samples, each 6 inches long and 2 1/2 inches in diameter. The split spoon sampler was driven into the soil beneath the borehole auger resulting in an 18 inch soil core which accurately reflects the composition and condition of the formation being sampled. The number of blows 02060010,032 17 required to drive the sampler 18 inches was recorded on the borehole logs (Appendix V). Prior to collecting each sample, all sampling equipment including the brass tubes and the split spoon sampler were washed with Trisodium Phosphate (TSP) and water, then double rinsed with' water. Upon recovery, the samples were visually inspected and screened with an organic vapor meter (OVM) for hydrocarbon vapors. The middle sample tube was retained for laboratory analysis as it generally had the best sample recovery. Samples of the drummed cuttings from each of the monitoring wells were also collected in brass sample tubes for chemical analysis. Upon recovery, the ends of each of the sample tubes were covered with aluminum foil, capped with plastic caps and secured with plastic tape. The tubes were then labeled with waterproof ink and the labels covered with plastic tape. All soil samples were stored on ice pending delivery to Sherwood Laboratories with proper Chain of Custody documents (Appendix II). The soil samples collected near the top of the groundwater in boreholes MW-3 and MW-4 at a depth of approximately 15 feet below ground surface and the soil Samples collected from the drummed cuttings were analyzed for the following: Analysis Method (EPA Method 8015M) Total Petroleum Hydrocarbons as Gasoline (TPHG) Total Petroleum Hydrocarbons as Diesel (TPHD) (EPA Method 8015M) Benzene, Toluene, Ethylbenzene, Xylene (BTEX) (EPA Method 8020) Laboratory analytical results of the soil samples collected from the boreholes and drummed cuttings are presented in Appendix VI and summarized on Table 3. 02060010.032 18 Concentrations of TPHG and BTEX were reported as being below detection limits for all the samples analyzed. Low levels of diesel and motor oil, ranging from 15 mg/kg to 55 mg/kg, were detected by the TPHD analysis of the drummed soils from boreholes MW-l, MW-2 and MW-4. These concentrations are consistent with Iow levels of diesel and motor oil contamination detected in the samples collected from soils stockpiled on the remediation pads. These concentrations are interpreted to be associated with minor hydrocarbon surface contamination which is common at the site. 7.4 Groundwater Sampling and Analyses Groundwater samples were collected from monitoring wells MW-l, MW-2, MW-3 and MW- 4 on September 29, 1995. All samples were collected from the Wells using disposable plastic bailers. Prior to collecting samples, the elevation of each well head was measured with a theodolite and the water depth in each well was measured to within .01 inches. Approximately 15 gallons of water (approximately 4 well volumes) was bailed from each well. Temperature, conductivity and pH of the bailed water were measured and recorded to establish stability of the water conditions. These measurements; as well as the water level measurements, are included on Table 4. All of the bailed water was stored on-site in steel drums. Water samples from each well were poured from the bailer into 40 mi. glass VOA's and glass 1 liter amber bottles which were obtained from Sherwood Laboratories. The sample containers were stored on ice and transported to Sherwood Laboratories in Hilmar, California with proper Chain of Custody documents (Appendix II). 02060010.032 19 The following analyses were conducted on each groundwater sample: Analyses Method Total Petroleum HydrOcarbons as Gasoline (TPHG) EPA 8015M Total Petroleum Hydrocarbons as Diesel (TPHD) EPA 8015M Benzene, Toluene, Ethylbenzene, Xylene (BTEX) EPA 8020M Laboratory analytical results of the groundwater samples collected from. the monitoring wells are presented in Appendix VII and summarized on Table 5. Concentrations of TPHG, TPHD and BTEX were all reported as being below detection limits for each of the groundwater samples. 02060010.032 20 8.0 CONCLUSIONS AND RECOMMENDATIONS 8.1 Conclusions The conclusion of this investigation are summarized as follows: 1. A former underground storage tank was responsible for gasoline contamination of soil and groundwater beneath the northeast area of the former Leo Black Electric site. A total of approximately 5700 cubic yards of clean and hydrocarbon contaminated soil was removed from the subsurface during excavations conducted in 1991 and 1993. A total of approximately 1660 cubic yards of hydrocarbon contaminated soil was stockpiled on remediation pads constructed on the Leo Black Estate Property. 2. All hydrocarbon contaminated soil removed and stockpiled from the 1991 excavation was sampled for hydrocarbon content. All soil samples were reported as below detection limits and the remediated soil was approved for use as excavation backfill by KCEHSD. 3. The maximum areal extent of the soil excavation extended approXimately 30 feet north of the property line onto the adjacent Reed parcel. All significant hydrocarbon contaminated soil was removed during the 1993 excavation. 4. Hydrocarbon contaminated soil removed and stockpiled from the 1993 excavation was sampled for hydrOcarbon content. Concentrations of TPHG and BTEX were reported as below detection limits for all of the samples. The samples did contain minor concentrations of diesel and motor oil varying in concentration from 5 ppm to 39 ppm, which is probably associated with hydrocarbon surface staining. All of the stockpiled soil from 02060010.03221 the 1993 excavation was remediated to acceptable levels for use as excavation backfill. KCEHSD concurred with this conclusion and all of the stockpiled soil was used as backfill material. 5. The depth to groundwater has risen from approximately 45 feet below ground surface to approximately 15 feet below ground surface since the time of the 1993 excavation. Groundwater elevations measured in the four monitoring wells indicates the groundwater gradient is to the southwest. !~! 6. Groundwater encountered at a depth of 45 feet beneath the site during the ..... 1993 excavation contained hydrocarbon contamination in the form of TPHG, TPHD and xylene. Laboratory analyses of groundwater samples collected from the four monitoring wells installed at the site in 1995 are reported as below detection limits for all hydrocarbon constituents. 8.2 Recommendations WZl recommends the following: ! 1. No further investigation of hydrocarbon contaminated soil is warranted for the Leo Black Estate property and no additional investigation or excavation i~i:i is recommended. ~!! 2. The four groundwater monitoring wells should be sampled quarterly until four successive quarters of monitoring indicate hydrocarbon constituents are below analytical detection limits. At this time, KCEHSD is requested to issue a Closure Letter for the groundwater phase of the Leo Black Estate investigation. 02060010.032' 22 9.0 REFERENCES CITED Kern County Water Agency, 1987, Water Supply Report 1986: Kern County Water Agency Annual Report, 70 p. 02060010.032 23 TABLE 5 LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY SAMPLE WELL DATE TPH GASOLINE TPH DIESEL BENZENE TOLUENE ETHYLBENZENE XYLENE NUMBER NUMBER COLLECTED ug/I ug/I ug/I ug/I ug/I ug/I LAB LB-MW1-1 MW - 1 9/27/95 ND ND ND ND ND ND SHERWOOD LB-MW2-1 MW- 2 9/27/95 ND ND ND ND ND ND SHERWOOD LB-MW3-1 MW - 3 9/27/95 ND ND ND ND ND ND SHERWOOD LB-MW4-1 MW - 4 9/27/95 ND ND ND ND ND ND SHERWOOD ND = NONE DECTECTED F:\CLIENTS\LEO BLACK\WATERTBLWQ2 13Cd I0/1 ~gs --~ ~ Beardsley Primary Sch O~/vE .... ..~: · ~,.~ - '".,. ' . Beardsle . .: ..~ / Sch~l _~_ .,~: J .. '-. ........ SITE LOCATION ~ .... "o o' = P o ;'. t~/ -'~;'-2. "~ ~ -~ o · .':[}~.' ~ · ~ /' ...'. :~;.~......., , 22 - o o o oa ~ ~1 ~ . · ' o ~ ~ o o A / ~" ~ ~.?--. ,~:.~'i '.~ , · ~'" " "26 ;7 Mile 23 '% 99 ' . T29S / R27E BAKERSFIELD. CAUFORNIA LEO BLACK ELECTmC $O0O ~IERCE ROAD, BAKERSREL~, CA o. ~ogo' 4~oo' LOCATION MAP SCALE IN FEET DATE ~ 1/.5 J 02~.mmA I eXH~mT 1 $ NOLLYA3'F:I 'NOI.LVAg'I~] gOV::lbln~ EIJ].LVMC]NnOI:I!D (]NV OldlODd$ NOIJ.¥00'I NOItO:~S ~;OEIO .~ ...... V NOI.LVOO9 99E]/~ ~NIHOJ-INO~I OluJ. o~'la ~ovge 03'[ ON~O3'] WNUO~nVO 'O'~USU~)~Ve II~ · .... ,~ '; 130~Vd Q99,~ SITE. LOCATION SEDIMENTARY AND METASEDIMENTARY ROCKS r~ Dune sa.d ~ Pleistocene nonmarine ~ ~ Ref: Division of Mines and Geology, Geologic Alluv/um Plio-Pleistocene nonmarine Map of Oalifornia, Bakersl'ield Sheet Fan deposits .~ LEO BLACK ELECTRIC Basin deposits i ~ lYliddle Miocene maline 3909 PIERCE ROAD, BAKERSFIELD, CA Qu,.ternary nonmarine t~rrace deposita REGIONAL GEOLOGIC MAP ~ IOt Statute Miles DATE 11/95 0206.0010 EXHIBIT 6 SITE LOCATION RO~,O .-R27E. WZI INC. BAKERSFIELD, CALIFORNIA LEO BLACK ELECTRIC 3909 PIERCE ROAD, BAKERSFIELD. CA REGIONAL DEPTH TO GROUNDWATER MAP · ~_,.~_ o .~ ~,~ REF: Kern County Water Agency. ID#4, 1992 DATE 11/95 0206.0010 EXHIBIT 7 SITE LOCATION / BAKERSFIELD, CALIFORNIA LEO BLACK ELECTRIC 3909 PIERCE ROAD, BAKERSFIELD, CA REGIONAL GROUNDWATER ELEVATION MAP '~ - ° '~ ~, REF: Kern County Water Agency, ID#4, 1992 DATE 11/95 I 0206.0010 IEXHIBIT 8 I I GALLON GALLON GASOLINE DIESEL TANK TANK PROPERTY LOC.~T~ON OF US~S REMOVED BOUNOARY ...................... PROPERTY LIMIT OF 19~ LEO B~CK PARCEL LEGEND FENCE . I LEO BLACK ELECTRIC ~W.~ GROUNDWATER MONITORING WELL LOCATION A ...... A' CROSS SECTION LOCATION ~ROSS SECTIONS AND AERATION PILE ~ SAMPLE LOCATION-SOILD STOCKPILED ON ~E I I~X~B~ ' ~ REMEDIATION PADS LEGEND t.OCATION OF SO~L BORING DRTI.J,.EO BY KRAT. A~ & ASSO~IATE~, 7f91 SITE ACTIVITY MAP ~, ........................................................... ~:. ..'..~ ....... ~ I . ~,. I ~--' ~'[ ~ ~ ~C' - ' ,~. ~r .......... ~'" ~ MW ~ ~mxi~te ~flon ~ te~ ~ weft ~-1 LEO B~CK E~CTRIC TABLE 1 LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY · SOILS STOCKPILED ON REMEDIATION PADS SAMPLE DATE TPH GASOLINE TPH DIESEL BENZENE TOLUENE ETHYLBENZENE XYLENE LEAD NUMBER COil I=CTED mcj/kg mg/kg ug/kg ucj/kg ug/kg ug/kg mg/I LAB LB-RP1-NW 6/22/95 ND 11 MOTOR OIL ND ND ND ND NA SHERWOOD LB-RP1-NE 6/22/95 ND 7 DIESEL ND ND ND ND 0.13 SHERWOOD/ ASSOCIATED LB-RP1-SW 6/22/95 ND 39 DIESEL ND ND ND. ND NA SHERWOOD 10 MOTOR OIL LB-RPI-SE 6/22/95 ND 5 MOTOR OIL ND ND ND ND NA SHERWOOD LB-RP2-E 6/22/95 ND 17 MOTOR OIL ND ND ND ND NA SHERWOOD LB-RP2-W 6/22/95 ND 6 DIESEL ND ND ND ND 0.60 SHERWOOD/ 8 MOTOR OIL ASSOCIATED ND = NONE DECTECTED NA = NOT ANALYZED F:\CLIENTS\LEOBLACK~SOILTBL1 .WQ2 TABLE 2 LEO BLACK ELECTRIC GROUNDWATER MONITORING WELLS WELL DEVELOPMENT - WATER CHARACTERISTIC DATA WELL SAMPLE DATE pH CONDU~IVITY TEMPERATURE NUMBER NUMBER COLLECTED (pH units) i~,(uomhs/cm) .' (degrees F) MW-1 1 9/22/95 8.06 4.15 75.5 2 9/22/95 8.22 2.55 73.4 3 9/22/95 8.32 1.808 71.5 4 9/22/95 8.25 1.844 73.3 " 5 9/22/95 8.26 1.720 71.8 ~'I.'?~ 6 .... 9/22/95 8,29 1.657 71.9 MW-2' 1 9/22/95 8.11 1.885 83.4 2 9/22/95 8.34 1.718 91.6 3 9/22/95 8.24 1.394 75.8 4 9/22/95 8.17 1.304 72.9 5 9/22/95 8.18 1.31 2 72.1 6 9/22/95 8.16 1.298 72.9 7 9/22/95 8.18 1.292 72.2 MW-3 1 9/22/'95 8.35 1'.664 .. , 7414 .'. 2 9/22/95 8.34 1.313 74.7 3 9/22/95 8,09 1.237 72.5 4 9/22/95 8.24 1.224 73.4 5 9/22/95 8.26 1.1 69 73.8 6 9/22/95 8.23 1.172 73.9 MW-4 1 9/22/95 8.'06 2.05 85.5 2 9/22/95 8.12 1.670 82.5 'l~,~, 3 9/22/95 8.02 2.50 80.1 4 9/22/95 8.36 1.799 82.3 '":~i 5 9/22/95 8.25 1.678 79.4 6 9/22/95 8.24 1.637 78,2 7 9/22/95 8.15 1.603 79.3 , 8 9/22/95 8.18 1.573 79.5 9 9/22/95 8.20 1.560 79.9 10 9/22/95 8.21 1.595 78.7 F:\CLIENTS\LEOBLACK\WTRDATA2.WQ2 BCJ 10/16/95 TABLE 3 LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY SOIL SAMPLES COLLECTED DURING MONITORING WELL DRILLING SAMPLE WELL DATE DEP'I;H TPH GASOLINE TPH DIESEL BENZENE TOLUENE ETHYLBENZENE XYLENE NUMBER NUMBER COLLECTED (feet) mg/kg mcj/~g ug/kg ug/kg ug/kg ug/kg LAB LB-MW3-3 MW - 3 9/19/95 15.5 - 16.0 ND L'ND'~) ND ND ND ND SHERWOOD LB-MW4-3 MW - 4 9/19/95 15.5 - 16.0 ND {~D~,'[l~ ND ND ND ND SHERWOOD LB-MW1 -GRAB MW - 1 9/20~95 ND 15 MO"T'(~ R OIL ND ND ND ND SHERWOOD LB-MW2-GRAB MW - 2 9/20/95 ND ~2'~D_I_~EL ND ND ND ND SHERWOOD 55 MOTOR OIL LB-MW3-GRAB MW - 3 9/20/95 ND ND NO NO ND ND SHERWOOD LB-MW4-GRAB MW - 4 9/20/95 ND ~EL ND ND ND ND SHERWOOD 27 MOTOR OIL ND = NONE DECTECTED GRAB = SAMPLE COLLECTED FROM DRUMED CU'I-I'INGS F~CU ENTS~EOBLACK~SOILTBL2.WQ2 ~ 1~1~ TABLE 4 LEO BLACK ELECTRIC GROUNDWATER MONITORING WELLS GROUNDWATER SAMPLING -WATER CHARACTERISTIC DATA TEMPERATURE WELL SAMPLE DATE pH CONDU~IVITY NUMBER NUMBER COLLECTED (pH units) (uomhs/cm) , (degrees F) MW-1 I 9/27/95 7.85 355 75.3 Water Depth (below wellhead): 13.76' 2 9/27/95 7.75 213 73.7 Wellhead Elevation (above SL): 402.65' 3 9/27/95 7.60 215 72.0 IGroundwater Elevation (above SL): 388.89' 4 9/27/95 7.47 211 70.9 5 9/27/95 7.56 208 70.3 MW-2 I 9/27/95 7.65 129 71.5 Water Depth (below wellhead): 14.01' 2 9/27/95 7.58 120 69.4 Wellhead Elevation (above SL): 404.01' 3 9/27/95 7.48 120 ' 68.6 Groundwater Elevation (above SL): 390.00' 4 9/27/95 7.54 120 68.1 MW-3 1 9/27/95 7.56 99 71.8 Water Depth (below wellhead): 14.35' 2 9/27/95 7.60 98 68.5 Wellhead Elevation (above SL): 402.83' 3 9/27/95 7.53 96 68.3 Groundwater Elevation (above SL): 388.48' 4 9/27/95 7.44 93 67.0 , MW-4 I 9/27/95 7.41. 113 69.1 Water Depth (below wellhead): 14.81' 2 9/27/95 7.48 114 67.1 Wellhead Elevation (above SL): 401.93' 3 9/27/95 7.31 116 67.1 Groundwater Elevation (above SL): 387.12' 4 9/27/95 7.27 114. 66.5 F:\CLIENTS\LEOBLACK\WTR DATA1 .WQ2 JAW 10/13/95 APPENDIX I ENVIRONMENTALHEALTH SERVICES DEPARTMENT STEVE McCALLEY. R.E.H.S. " .':':::::;:" ~-~.~~ :7oo 'M' Stt.,t. Suit, 300 :? AT.. DIRECTOR ~~;: .~ aaker~field, CA 93301 ~ {805) 861-3636 (805) 853-3429 FAX September 30, 1993 Tom Gilbert P. O. Box 121 Wofford Heights, CA 93285 SUB~E~: Underground Tank Ske Remediation, Leo Black Estate, 3909 Pierce Road, Bakersfield, CA (Permit No. 050119) Dear Mr. Gilbert: The August 1993 soil remediation report prepared by .V,.tZI Inc. for the.subject site has ......... Been. reVieWed. The report results indicate that all gasoline-contaminated soil to an approx:imate depth ot' 45 feet has been removed. The groundwater grab samt~te results, however, showed the presence or' significant levels or' total petroleum hydrocarbons quantified as gasoline and diesel. Based on our review, the Department does not require any additional excavation at the site. We concur with WZI's recommendation to remediate the contaminated soil presently stored on site by aeration. Upon successful completion of remediation, the soil may be utilized as backfill for the remaining excavation. [ As to your request to discontinue groundwater monitoring, the Department does not concur with the explanation provided to support the proposed action. Supporting documentation '. needs to be provided to prove that only gasoline was stored on site. Although other sources of hydrocarbon contamination have been identified in the area, there is sufficient evidence to suggest that Leo Black Estate also has contributed to this contamination as shown in the work reports to date. To this end, we require that gasoline contamination '.~ in the groundwater at this site be investigated further. Please submit your plan' to add?ess-this matter within 60 days from the date of this letter. If you have any questions regarding this correspondence,, please call me at (805) 861-3636. Sincerely, Steve McCalley, Director By: Dolores Gough Hazardous Materials Specialist II Hazardous Materials Management Program DG:ch cc: WZI Inc. Winifred Thomson Donna Roberts Read Investments, c/o J'ohn Sears Central Valley RWQCB gougDgilberl.let 'f--' ENVIRONMEN L HEALTH SERVICES DEPARTMENT STEVE McCALLEY, R.E.H.S. ,~ 2700 *M' Street, Suite 300 DIRECTOR ~ Bakersfield, CA 93301 (805) 861-3636 (805) 861-3429 FAX "' February 9, 1995 Leo Black Estate c/o Tom Gilbert & Donna Roberts P. O. Box 121 Wofford Heights, CA 93285 SUBJECT: Underground Storage Tank Investigation, Leo Black Estate, 3909 Pierce Road, Bakersfield, CA (Permit No. 050119) Dear Sir/Madam: A review of the subject facility file indicates that site closure was denied last year because of the contamination found in groundwater. Further investigation, which may involve groundwater monitoring initially was required. To our knowledge this work has not been initiated to date. In order to facilitate site closure and keep the facility in compliance with the state's and our corrective action requirements, the additional groundwater assessment work must be initiated as soon as possible. Prior to beginning field activities, a workplan must be submitted for our approval within 30 days from the date of this letter. As previously discussed, the excavated soil may be utilized as backfill if confu-matory sampling shows that remediation has been successful. If you have any questions regarding this matter, you may contact us at (805) 861-3636. Singerely, Steve McCalley, Director By: Dolores Gough Hazardous Mater/als Specialist II Hazardous Mater/als Management Program DG:cas cc: WZI CVRWQCB - Fresno \gough\050119e.clt · ' ENVIRONMENTAL HEALTH SERVICES DEPARTMENT STEVE McCALLEY, R.E.H.S. ~ 2700 'M' Street. Suite 300 DIRECTOR .- Bakersfield, CA 93301 (805) 861-3636 (805) 861-3429 FAX April 10, 1995 Leo Black Estate c/o Tom Gilbert & Donna Roberts P. O. Box 121 Wofford Heights, CA 93285 SUBJECT: Underground Tank Site Assessment and interim Remedial Action Workplan for Leo Black Estate, 3909 Pmrce Road, Bakersfield, CA (Permit No. 050119) Dear Mr. Gilbert & Ms. Roberts: The subject workplan prepared by WZI Inc. has been reviewed. The proposed tasks including the methods of implementation are acceptable to this Department. In regard to the stockpiled soil, sampling should be conducted before interim remedial action is initiated to determine if any volatile organics remain in the soil. We recommend retrieving a minimum of three samples composited to one for every 50 cubic yards. The field work for this phase of the investigation must be initiated within 60 days from the date of this letter. Please notify this office at least 48 hours prior to beginning any sampling and/or drilling activities. If you have any questions regarding this matter, I can be reached at (805) 861-3636. Sincerely, . . Steve McCal!ey, Director . . By: Dolores Gough Hazardous Materials Specialist II ' ' Hazardous Materials Management Program DG:ch cc: WZI Inc. Central Valley RWQCB gough\050119 f. clt' ~ STEVE McCALLEY, R.E.H,S. C 0 U N T Y DIRECTOR Environmental 2700 'M" S~'eel, Suite 300 Health BaJ<ersfieid, CA 93301 Services (805)8614636 Department (8o5)861-3429 FAX July 10, 1995 James Allen Waggoner WZI, Inc. P. O. Box 9217 t..., Bakersfield, CA 93389 -~:: SUBJECT: Stockpiled Soil Analysis, Leo Black. Estate, 3909 Pierce Road, Bakersfield, CA !{:i (Permit No. 050119) Dear Mr. Waggoner: The'laboratory results of the samples retrieved from the soil piles at the Leo Black Estate have been reviewed. As discussed, the soil may be used as backfill to the existing excavation at the site. Following completion of backfilling activities, implementation of the workplan recently approved may be initiated. If you have any questions regarding this matter, I can be reached at' (805) 861-3636. Sincerely, .. Steve McCalley, Director By: Dolores Oough Hazardous Materials Specialist II 'Hazardous Materials Management pro~ram' DG:cas cc: Tom Gilbert / Donna Roberts REOEt~IED BY Wendy Thompson ' JUL 1 3 1995 WZi INC, ~ McCALLEf, R.E.H.S. RECEIVED BY c o u N T Y DIRECTOtt OCT 3 Environmental 2700 'M' S~eet, Suite 300 WZ~ INC. Health Bakersfield, CA 93301 Services (~05)861-3636 Department (8o5)8§1-3429 F~X October 9, 1995 Allen Waggoner WZI, Inc. P. O. Box 9217 Bakersfield, CA 93389 -: SUBJECT: Soil and Groundwater Sampling Results, Leo Black Estate, Pierce Road, il Bakersfield, CA Dear Mr. Waggoner: We have reviewed the laboratory results of the soil (drill cuttings) and groundwater samples collected from the newly installed monitoring wells. Based on our review, thi's Department approves of your plan to spread the cuttings on site. The water may be left to evaporate on site or used for dust control during the soil spreading activities. If you have any questions regarding this letter, you may contact us at (805) 861-3636. Sincerely, .. Steve McCalley, Director By: Dolores Gough Hazardous Materials Specialist II Hazardous Materials Management 'Program DG:cas cc: Donna Roberts 1004 Lorene Avenue Bakersfield, CA 93308 \Bough\050119H.¢lt APPENDIX II ~ '.. ~/~ c Analysis Request Special Instructions ' Sample Remarks/Sample Condition - -~mPle Number Date Type ~ 'Relinquished By (Sign &Print) , Date~ime , 0 ff~ R :e~ved By (Sign) Date/Time A~ORNEY CLIENT PRIVILEGED P~go o~ Po~I Office Box 9217 0~26-1112 ~ample T~e: (che~ one) (% o ~ ~ 7 ~[ - C ~ 6 4 ~ Ddnking Water Sudace Water Waste Water Oil /Soil ~ , Sludge ~her (specify) '::;eam¢le Description(s): ~¢¢~ ~ ¢~ / ~_ Sample Number Date Colle~ed .. CollectoCs Name Type of Analysis I ;a~le(s) Reli~u~h~ by: Date: Time: Sample(s) R~eived by:. Date: Time: Sample(s) Receiv~ in ~b by: ~~;~[~: ~'(~O~v"t~. Dar Time: C~N OF CUSTODY DOCUMEI~ ZI INC. Post Office Box 9217 /L/ ~ersfield, California 93389 )5/326-1112 :~ample Type: (ch~ one) ~ Drinking Water Su~ace Water Waste Water Oil Soil ~ Sludge ~ther (specify) ' Sample Number DateCollected Collecloes Name Type of Analysis arnple(s) Relinquished by: Date: Time: Sample(s) Received by: Date: Time: ! ample(s) Relinquished to Lab by: ///~ ~~ ~~,,-~-,->--~.~.'~' Date:,./~,,~/~',ff Tim e: ~'; .~'~ ~, , Y~.,., - . ..--h,,~/ .. ,./ I.:/.~...,/,, .. Sample(s) Received in Lab b¥: ~'X-~',~(t-~I'I,") ii,/~ /' "lYh,"~'~(;~'~,!' Date: /(-,?~f,'..~. Time: //'.:~ 6" ~ ri 1 " APPENDIX III ~ ~UN-27-1995 16:12 SHERllIOOD LABS, INC. 20966772581 P.02 " SherwOod 8071 NORTH LANDER AVENUE P.O. BOX ~7 C 0 R P 0 R a T I 0 N HILMAR, CALIFORNIAg5324 - EtBl~/('~j5 DHS CertifiCation # 14El0 ..... ANALYSIS REPORT= BTEX/Total Petro. Hydrocarbons as Gasoline CLIENT= WZI INC PO BOX 9217 Bakersfield. CA 93389 Attn= Steve Muir ProJect Name= Leo Black Estate Date Sampled= 06/22/95 Date Received~ 06/25/g5 Date Started= B6/26/95 Date Completed~6/27/95 Sampled By= Stephen ~ulr Lab Report #= H5~62606 BTEX TPH-gasollne · RESULTS= EPA 8020 EPA 5~3B/8015(M) ug/Kg mg/Kg Ethyl Total Benzene, Toluene, Benzene. Xvlene TPH PHS~6318g ND<3 ND<3 ND<3 ND<3 ND<I LB-RP1 -NW PH5~63190 ND<3 ND<3 ND<3 ND<3 ND<I LB-RP1-NE PH5063191 ND<3 ND<3 ND<3 ND<3 ND<I 'LB-RPI-SW PH5~63t'92' ND<3" ND<3 .... ND<3'- ND<3 - ND<I ........... _ . LB-RPI-SE PH5083193 ND<3 ND<3 ND<3 ND<3 ND<I LB-RP2-E' PHSB63194 NO<3 ND<3 ND<3 ND<3 ND<I LB-RP2-W Gloria Poi'lng Laboratory Director OFFICE: (209) 667-5256 · FAX: (209) 667-2581 · 885: (209) 667-4119 JUN-27-1995 16:12 SHERWOOD LABS, INC. 28966772581 P.03 Labs ., C 0 R P 0 R A T I 0 N HILMAR, CALIFORNIA g~24 ANALYSIS REPORT: Total Recoverable Petro, Hydrocarbons CLIENT~ WZI INC PO 80X g217 Bakersfield, CA 9338g Attn~ $~eve Muir Date Sampled= 06/22/95 Project Namer Leo Black Estate Date Recelved~ ~6/23/95 Date Started= e6/26/g5 Sampler~ Stephen Muir Date Completed,06/27/95 , Lab Report #~ H5062606 RESULTS~ ~RPH-Olesel, Kerosene, Oielectrlc and Motor Oils EPA 3540/8~15(M) mglKg ; PHSB63189 11 Motor 0 · '.' LB-RP1-NW .!' i PHSE}631 90 7 D i ese I LB-RP1 -NE PH5063191 39 Diesel LB-RP1-SW 10 Motor 0 PHSEI63192 5 Motor Oil LB-RP1 -SE t:i~i PH5063193 -, 17 Motor Oil LB-RP2-E ' PHSEI63194 6 Diesel LB-RP2-W 8 Motor 0 ; Gloria Poling · : Laboratory Dlreotor OFFICE: (20g) 687-5258 · FAX: (209) 667-2581 · BBS: (209) 667-4119 47 ~ .,~,, ~..~,? RECEIVED BY ~<L~../ ?~" ~j JUl !8 1995 ~SOC~D ~O~~S ~06 North Bar,ia- Orange, ~lifornia ~2668- 714/771~900 F~ 7J4/588-1209 CLIENT Sherwood Laboratories (507~) LAB NO. G9249~ k~n: B~enda P.O. Box 937 ~PORTED 06/30/95 807~ N. Lande~ Ave. Hi~ma~, CA 95324 SAMPLE Soil RECEIVED 06/26/95 IDENTIFICATION WZI Date Collected 06/22/95 BASED ON SAMPLE As Submitted EPA Date Constituent Method Analyst LB-RP1-NE LB-RP2-W Lead (STLC) 6010 06/03 MT 0.13 mg/1 0.60 mg/l' Robert A Webber Vice President .,RAW/gk NOTE: Unless notified in writing, all samples will be discarded .by appropriate disposal protocol 30 days from date reported. TESTING & CONSULTING Chemical · The reports of ti're Associated I_aOoratorles are confidential property of our clients and MicroDio/Ogicol · may not De reproduced or used for publication In part or In full wltl~out our written permission. TIlls Is for the mutual protection of the public, our clients, and ourselves. Envfronmentol · C-! tOM APPENDIX IV STEVE McCALLEY, R.E.H.S. DIRECTOR HAZARDOUS MATERIALS C 0 U N T Y MANAGEMENT PROGRAM Environmental 2700 "M" Sffeet, Suite 300 MONITORING WEII (S) PERMIT Health Bakersfield, CA 93301 Services (805)861-3636 , Department (805)8~, 1-3429 FAX PERI~OT #: MW 1531-05 OWNER'S NAME: Leo Black Estate ~ 1532-05 ~ 1533-05 FACILITY NAME: Leo Black Electric ~ 1534-05 FACILITY LOCATION: 3909 Pierce Road DRILLING METHOD: Hollow Stem Auger CONTRACTOR: Melton Drilling LICENSE NO.: C 57 - 508270 ENVIRONIV[ENTAL CONTRACTOR WZI, Inc. 'TYPE OF MONITORING WELL(S) Groundwater NUMBER OF WELLS REQUIRED TO MONITOR FACILITY: Four (4) GENERAL CONDITIONS OF THIS PERMIT: 1. Well site approval is required before beginning any work related to well construction. It is unlawful to continue work past the stage at which an inspection is required unless inspection is waived or completed. 2. Other required inspections include: conductor casing, all annular seals, and final construction features. 3. A phone call to the Department office is required on the morning of the day that work is to commence and 24 hours before the placement of any seals or plugs. 4. Construction under this Permit is subject to any instructions by Department representatives. 5. All wells constructed Of PVC located at a contaminated site where degradation may occur must be destroyed after 2 years or prove no degradation is occurring or has occurred. 6. Any misrepresentation or noncompliance with required Permit Conditions or Ordinance will result in issuance of a "STOP WORK ORDER." 7. '~ A copy of the Department of Water Resources Driller's Report, as well as copies of logs and water quality analyses, must be submitted to the Health Department within 14 days after completion of the work. 8. A well destruction application must be filed with this Department if a well is being destroyed that is not in conjunction with a test hole permit. 9. The permit is void on the ninetieth (90) calendar day after date of issuance if work has not been started and reasonable progress toward completion made. Fees are not refundable nor transferable. 10. I have read and agree to comply with the General Conditions noted above. SPECIAL CONDITIONS: 1. Approved Annular Seal Depth Approximately 37 Feet. OWNER'S SIGNATURE DATE CoI~r~RACTOR;S-~5'~TURE ~ 6ATE' Dolores Gough v Hazardous Materials Specialist DATE: September 19, 1995 DG:cas ~gough\1531-05h.m46 APPENDIX V LOG OF MW-1 ANALYSES SAMPLE Lab Field WELL COMPLETION ~ ~ SOIL DESCRIPTION o '~' DIAGRAM Ben- Hnu ~ ~. > ~ ~ = (WITH REMARKS) zene P.I.D.! _o ~ ~ ~ ~ ~d TPH ~ ~ ~ ~ -- · ~m Lo~ing Well C~ - % -- 0 -- S~ BROWN. SA~D. ~IST. LOOSE. FINE TO ~ , 0 ~ ~ MEDIUM GRAINED. MINOR PEBBLES. SLIGHTLY ~, , CEMENT TO m -- SIL~ ~- - SURFACE ( NO O~R ) ~ ~ BENTONITE 0 ~10 ~ SW BROWN, SAND, MOIST, LOOSE TO MEDIUM - ~ DENSE, MEDIUM TO COARSE GRAINED, MINOR [ .~. ~ PEBBLES, SlL~ ( NO O~R ) - ~:;. ??: o --15-- ~ SW BROWN, SAND, ~IST TO VERY MOIST, MEDIUM ;~;~;~~:;.~ SAND 0 ~20 ~ SW BROWN, SAND. VERY MOIST TO WET, MEDIUM · '?~'?; DENSE, MEDIUM TO COARSE GRAINED, PEBBLY ~.. Z' ?~ ' ./: ::':; ' ':t. O ~30 ~ SW BROWN, S~D. WET, LOOSE TO MEDIUM ~ DENSE, MEDIUM TO COARSE GRNNED, MINOR '. ~ ? ~ PEBBL~, SlL~ (NO O~R) ::::;. - _ -.: :~ ¢~ ~35 :::::- ,::.:: - - ~ '/: ~ ~ DENSE, MEDIUM TO COARSE G~INED, PEBBLY ? ~::' 0 SP ( NO ODOR, NO OVM RESPONSE ) ",".", 40 ~ TD 40' ~ WATER AT 14.4' BELOW GROUND LEVEL ~ ALL C~INGS DRUMMED "· ~45 LOGGED BY: a. WAGGONER SURFACE ELEVATION: 402.65' SUPERVISED BY; TOTAL DEPTH: 40' DIAMETER OF BORING: 8' DATE DRILLED: 9/18/95 WATER ENCOUNTERED AT: 14.4' LOCATION: LEO BLACK ELECTRIC 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA LOG OF MW-2 ANALYSES SAMPLE Lab i Field ~ -- WELL COMPLETION · ~ ~ SOIL DESCRIPTION DIAGRAM Ben- Hnu ~ ~ > ~u ~ ~= (WITH REMARKS) zene P.LD. TPH ~ gu ~ :E ~ d POm ppm n _Z Z ,-° L~cking Well Cap --- ~--°/]~1 0 ~ 0 -- SW BROWN TO DARK BROWN, SAND, MOIST, ' t' LOOSE, MEDIUM GRAINED, MINOR SILT 't .' CEMENT TO ~ ~ ( NO ODOR ) ~ SURFACE ~ 1 BAG ]* *; BENTONITE ' '.?1 0 --10 -=- SW BROWN, SAND, MOIST, LOOSE TO MEDIUM, '";: '!iiit ~ ~ DENSE, MEDIUM TO COARSE GRAINED, MINOR ii!:.' ~ PEBBLES, MINOR SILT ( NO ODOR ) ii' ':' ~ ~ ~-- BROWN, SAND, VERY MOIST TO WET, LOOSE :: 0 --15 '--' ~ SW TO MEDIUM DENSE, COARSE GRAINED, MINOR ~ ~ PEBBLES -- ( SAND BECOMES WET AT 14'. NO ODOR ) ~i~]~ -- -- (NOODOR) ".".'i ' -J '.'.': --30 --- ~ UGHT BROWN TO BROWN.SAND, WET, LOOSE 0 an SP VERY MINOR SILT ( NO ODOR ) ~ TD 40' WATER AT 14.4' BELOW GROUND LEVEL ~ ALL CUTTINGS DRUMMED ' --'45 -- LOGGED BY: a. WAGGONER SURFACE ELEVATION: 404.01' SUPERVISED BY: TOTAL DEPTH: 40' DIAMETER OF BORING: 8' DATE DRILLED: 9/18/95 WATER ENCOUNTERED AT: 14.4' 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA LOG OF MW-3 ANALYSES SAMPLE LaD Field ~ -- WELL COMPLETION = ~ ~~ ~ SOIL DESCRIPTION DIAGRAM Ben- Hnu -- = ( WITH REMARKS ) zene ppm ppm Locking Well CaD '-- -- 0 -- SAND, MOIST, LOOSE, FINE TO 0 SM BROWN, ~ ~l MEDIUM GRAINED, SILTY , , CEMENT TO -- ( NO ODOR ) ~· SURFACE ,; · .0 2 -- 5 -- SW LIGHT BROWN TO BROWN, SAND, SLIGHTLY 3 -- __ ~ LB-MW3-1 MOIST, LOOSE, MEDIUM TO COARSE GRAINED, ~ 1 BAG 4 VERY MINOR SILT ~ * BENTONITE -- -- ( NO ODOR ) iii', ' '"'" 0 5 --10 SW BROWN, SAND, MOIST TO VERY MOIST, LOOSE, .:.- ,..'; 6 __ __ ;~; LB-MW3-2 MEDIUM TO COARSE GRAINED, MINOR 'i:} - ,.".' 8 -- -- PEBBLES, MINOR SILT ( NO ODOR ) '-''.": -- --~.--,T-- LIGHT BROWN TO BROWN, SAND, WET, LOOSE, · :'.., o 5 --15 -- = SW MEDIUM TO COARSE GRAINED, PEBBLY, MINOR TPHG-NO 6 __ ~ LB-MW3-3 ' '.'.i! -- SILT ( NO ODOR ) TPHO-ND 8 -- #3 SAND .:.: --20 -- o --25 -- SW BROWN, SAND, WET, LOOSE TO MEDIUM . ...... -- -- DENSE, MEDIUM TO COARSE GRAINED. MINOR · . - ; -- PEBBLES (NOODOR) "';" .';:" -- BROWN, SAND, WET, LOOSE TO MEDIUM -- -- DENSE, MEDIUM TO COARSE GRAINED, PEBBLY, 0 SP MINOR SILT ( NO ODOR ) -- TD 40' -- -- WATER AT 14.7' BELOW GROUND LEVEL -- -- ALL Cu3-rlNGS DRUMMED LOGGED BY: A. WAGGONER SURFACE ELEVATION: 402.83' SUPERVISED BY: TOTAL DEPTH: 40' DIAMETER OF BORING: 8" DATE DRILLED: 9/19/95 WATER ENCOUNTERED AT: 14.7' LOCATION: LEO BLACK ELECTRIC 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA LOG OF MW-4 ANALYSES SAMPLE LaD F~ld WELL COMPLETION ~= -_v ~< r~ ~ '~ SOIL DESCRIPTION DIAGRAM Ben- Hnu 8 -- ~ ( WITH REMARKS ) zene P.I.D TPH ~ uJ ~ ::> ~ _~ d. ppm ~ "- :::3 Locking' Well Ca~ ppm -- 0 -- SAND, SLIGHTLY MOIST, LOOSE. FINE 0 SM BROWN. , , -- -- TO MEDIUM GRAINED. SILTY ( NO ODOR ) , , CEMENT TO -- i~, 't SURFACE -- -- · 0 6 -- 5 -- SW LIGHT BROWN TO BROWN, SAND, SLIGHTLY / ~ LB-MW4-1 ~, -x 7 -- MOIST, LOOSE, MEDIUM TO COARSE GRAINED, ^ 1 BAG 8 -- MINOR SILT ( NO ODOR ) ~ ~ BENTONITE .;.'.- 0 7 --10 -- SW LIGHT BROWN, SAND, MOIST, LOOSE, MEDIUM ;'.'. 7 __ __ ~ LB-MW4-2 TO COARSE GRAINED, MINOR PEBBLES "'." -' s -- -- ( NO ODOR ) "'."-- 0 S ---15 -- ',~i~'' TPHG-ND 7 -- -- =~=a~ LB-MW4-3 ~ SW BROWN, SAND, WET, LOOSE, MEDIUM TO COARSE GRAINED, MINOR PEBBLES. MINOR .?~.: TPHD-NO 7 -- -- BTEX-ND I -- SILT ( NO ODOR, VERY WET) ..-:., ..',,' L - 9 BAGS __ ii! ' ~3 SAND r': __---20 -- ' o --25 -- SW BROWN, SAND, WET, LOOSE TO MEDIUM ....., .. __ -- DENSE, MEDIUM TO COARSE GRAINED, MINOR .:. - -- SILT ( NO ODOR ) '..'.' -. i::: --35 -- "-" ' v'. -- -- -- -- COARSE GRAINED, PEBBLY, MINOR SILT 0 ~ SP (NOODOR) -- -- TD 40' -- -- WATER AT 15.0' BELOW GROUND LEVEL -- -- ALL CUTTINGS DRUMMED ' '--45 -- LOGGED BY: a. WAGGONER ~ SURFACE ELEVATION: 401'.93' SUPERVISED BY: TOTAL DEPTH: 40' DIAMETER OF BORING: 8- DATE DRILLED: 9/19/95 WATER ENCOUNTERED AT: 15.0 ' LOCATION: LEO BLACK ELECTRIC {1~1 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA ........ TAr"71 0.~ .I ~ '~ APPENDIX V LOG OF MW-1 ANALYSES SAMPLE Lab Field WELL COMPLETION = ~ ~ ~ SOIL DESCRIPTION DIAGRAM Ben- Hnu ~ ~- > m"' ~ ~ (WITH REMARKS ) TPHzenep.i.D m-° LUn ~UCC~_ :::D:~ _~ ~;d. ppm n Z Z o Dpm -- Locking Well Cap ,~ 0 ~ 0 ~ SM BROWN, SAND, MOIST, LOOSE, FINE TO ~ -- MEDIUM GRAINED, MINOR PEBBLES, SLIGHTLY · t' CEMENT TO -- -- SILTY · t SURFACE ( NO ODOR ) i.'.', 0 ~10 ~ SW BROWN. SAND, MOIST, LOOSE TO MEDIUM ':?.i ~ DENSE. MEDIUM TO COARSE GRAINED, MINOR ' ~:~; ~ PEBBLES, SILTY ( NO ODOR } '- 0 ::15 "-- ---~ SW BROWN, SAND, MOIST TO VERY MOIST, MEDIUM · '.:.. DENSE, MEDIUM TO COARSE GRAINED · ''i:}~t3 SAND 0 ~20 --" SW BROWN. SAND, VERY MOIST TO WET, MEDIUM "i~! ~ DENSE, MEDIUM TO COARSE GRAINED. PEBBLY ?.;'- ~ :.'~ --25 -- '"".~' }[:i 0 --30 '" SW BROWN, SAND, WET, LOOSE TO MEDIUM '~:;: . '~"/: .... DENSE, MEDIUM TO COARSE GRAINED. MINOR ~'":' -- PEBBLES, SILTY ( NO ODOR ) ....: :..; -...} -- .. ::: - .'.-', ~:",' ~" :!:i ~ -- BROWN, SAND, WET, LOOSE TO MEDIUM .' .}} ~ . DENSE, MEDIUM TO COARSE GRAINED, PEBBLY · .,'..--?., 0 SP ( NO ODOR, NO OVM RESPONSE ) · -- TD 40' ~ ~ WATER AT 14.4' BELOW GROUND LEVEL ~ ~ ALL CU3-rlNGS DRUMMED ~45 LOGGED BY: a. WAGGONER SURFACE ELEVATION: 402.65' SUPERVISED BY: TOTAL DEPTH: 40' DIAMETER OF BORING: 8" DATE DRILLED: 9/18/95 WATER ENCOUNTERED AT: 14.4' LOCATION: LEO BLACK ELECTRIC ~ 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA 0206.0010 WZI Pacje 1 of I LOG OF MW-2 ANALYSES SAMPLE Lab Field WELL COMPLETION ~ SOIL DESCRIPTION DIAGRAM Ben- 8 "r Hnu ~ ~ > uJ ~ -o (WITH REMARKS) zene P,I.D, o n ppm bockin9 Well Cap 3pm · · o sw BROWN TO DARK BROWN, SAND, MOIST, · · LOOSE. MEDIUM GRAINED, MINOR SILT · CEMENT TO , ( NO ODOR ) · ,- SURFACE ~'~ * BENTONITE '{.? 0 ~10 ~ SW BROWN, SAND, MOIST, LOOSE TO MEDIUM, ' :i~'i ~ DENSE, MEDIUM TO COARSE GRAINED. MINOR ' ::'. ~ PEBBLES, MINOR SILT ( NO ODOR ) '"'::'i - -- BROWN. SA.D. VERY O,ST TO wET. OOSE ',.:: 0 ~15 '" SW TO MEDIUM DENSE, COARSE GRAINED, MINOR ' ':' ~ PEBBLES iiii ~ ( SAND BECOMES WETAT 14'. NO ODOR ) ..-., - '..': 0 ~25 ~ SW BROWN, SAND, WET. LOOSE TO MEDIUM ':',' - :": ~ DENSE, COARSE GRAINED. PEBBLY, VERY TO MEDIUM DENSE, COARSE GRAINED, PEBBLY, · 0 SP VERY MINOR SILT ( NO ODOR ) I , TD 40' WATER AT 14.4' BELOW GROUND LEVEL .... ALL CUTTINGS DRUMMED .. ~45 SURFACE ELEVATION: 404.01' LOGGED BY: A. WAGGONER TOTAL DEPTH: 40' SUPERVISED BY: DIAMETER OF BORING: 8' DATE DRILLED: 9/18/95 WATER ENCOUNTERED AT: 14.4' LOCATION: LEO BLACK ELECTRIC ~ 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA 0206.0010 WZI Page 1 of 1 LOG OF MW-3 ANALYSES SAMPLE WELL COMPLETION Lab Field ~ SOIL DESCRIPTION DIAGRAM Ben- Hnu ,,, ( WITH REMARKS ) zene TPH P.I.D. ~ uu ppm ppm Lockinc~ Well Cap '-- ~ o SM BROWN, SAND, MOIST, LOOSE, 0 FINE TO ~ MEDIUM GRAINED, SILTY · , CEMENT TO -- , , (NOODOR) ' · SURFACE % ,,. 0 2 --- 5 -- SW LIGHT BROWN TO BROWN, SAND, SLIGHTLY R · 3 __ __ ~ LB-MW3-1 MOIST, LOOSE, MEDIUM TO COARSE GRAINED. ~' 1 BAG 4 VERY MINOR SILT ^ BENTONITE -- -- ( NO ODOR ) .'.,'..- ..:'.. 0 5 ---10 -- SW BROWN, SAND, MOIST TO VERY MOIST, LOOSE, i !- iili 6 __ __ ~ LB-M~N3-2 MEDIUM TO COARSE GRAINED, MINOR ilil 8 -- -- PEBBLES, MINOR SILT ( NO ODOR ) ~'. -- -'' -- ~ LIGHT BROWN TO BROWN. SAND, WET, LOOSE, ~ '!.ii' o 5 --15 I ~ SW MEDIUM TO COARSE GRAINED, PEBBLY, MINOR :..: TPHG-ND 6 __ ~=~ LB-MW3-3 ';'" .;" TPHD-ND 8 __ -- SILT ( NO ODOR ) · :.: :.... · ..... BTEX.ND -- -'?';8 BAGS ",' .' #3 SAND --20 -- ,.:., 0 --25 -- SW BROWN, SAND, WET, LOOSE TO MEDIUM .':~ -- DENSE, MEDIUM TO COARSE GRAINED, MINOR iiiiI __ -- PEBBLES ( NO ODOR ) ....'. )"."; ~ ' :;:;! --30 -- .' V'. -- ' ' r-":. --35 -- :.::. !}i .~ '4. __ ' -../. -- BROWN, SAND, WET, LOOSE TO MEDIUM 'ii'."i" !.'i- __ __ DENSE, MEDIUM TO COARSE GRAINED, PEBBLY, '.'.' .--.'-'; 0 SP MINOR SILT ( NO ODOR ) -- TO 40' --. WATER AT 14.7' BELOW GROUND LEVEL ALL CUTTINGS DRUMMED LOGGED BY: A. WAGGONER SURFACE ELEVATION: 402.83' SUPERVISED BY: TOTAL DEPTH: 40' DIAMETER OF BORING: 8" DATE DRILLED: 9/19/95 WATER ENCOUNTERED AT: 14.7' LOCATION: LEO BLACK ELECTRIC ~ 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA 0206.0010 WZI Page 1 of 1 LOG OF MW-4 ANALYSES SAMPLE Lab Field WELL COMPLETION ~ ,,, SOIL DESCRIPTION DIAGRAM Ben- Hnu ,.., -u ( WITH REMARKS ) · TPHzene p.i.D. ~° u jcL ujC~ D:2~ _~>' ~v;. ppm ppm Lockinc~ Well Cap .--= 0 -- SLIGHTLY MOIST, LOOSE. FINE 0 SM BROWN. SAND, , ~, -- -- TO MEDIUM GRAINED. SILTY ( NO ODOR ) , ,~ CEMENT TO -- ' , SURFACE -- -- ~ 0 6 ~ 5 ~ SW LIGHT BROWN TO BROWN, SAND. SLIGHTLY "~^ '~ 1 BAG 7 __ ~ =~==~ LB-MW4-1 MOIST, LOOSE, MEDIUM TO COARSE GRAINED, .~. ~ BENTONITE 8 ~ ~ ~ ~ MINOR SILT ( NO ODOR ) f" ' ~ .5 :'..- ..:... 0 7 ~=-10 : ~ SW LIGHT BROWN, SAND, MOIST, LOOSE, MEDIUM "-'";5 7 ~ ~=m=a~ LB-MW4-2 TO COARSE GRAINED, MINOR PEBBLES ,";" ~V', S ~ ~ ( NO ODOR ) .".'.'- v': o 5 --15 -- ;'."' '.:'. ~ SW ' BROWN, SAND, WET, LOOSE, MEDIUM TO .;:; ....-. TPHG-ND 7 __ __ ~ LB-MW4-3 COARSE GRAINED, MINOR PEBBLES, MINOR ;..'. ..',.:'. TPHD-ND 7 -- -- SILT ( NO ODOR, VERY WET ) .:'~' ,'....'. BTEX.ND -- 9:L' ',:'. 9 BAGS · :.: ' ~3 SAND · '.. ' ---20 --- '.'"' ' 0 --25 -- SW BROWN, SAND, WET, LOOSE TO MEDIUM 9:' DENSE, MEDIUM TO COARSE GRAINED, MINOR ;-.., - · ;' SILT ( NO ODOR · .'.: - ~30 :..', .;.: · 2' ~35 · ...: . ....: - 9: " BROWN, SAND, WET, LOOSE TO MEDIUM i"i' ' COARSE GRAINED, PEBBLY, MINOR SILT ':':,,.~,, 0 SP ( NOODOR ) TD 40' WATER AT 15.0' BELOW GROUND LEVEL Al./. CUTTINGS DRUMMED ~45 LOGGED BY: A. WAGGONER SURFACE ELEVATION: 401.93' SUPERVISED BY: TOTAL DEPTH: 40' DIAMETER OF BORING: 8" DATE DRILLED: 9/19/95 WATER ENCOUNTERED AT: 15.0' LOCATION: LEO BLACK ELECTRIC 3909 PIERCE ROAD BAKERSFIELD, CALIFORNIA 0206.0010 WZI Pac~e 1 of 1 APPENDIX VI sherw°°d Labs C 0 R P 0 R A T t 0 N :qlLMA~.~ALIFO~N~A~532~ ~9/29/95 OHS Ceetification ~ 14~ ANALYSIS REPORT= BTEX/Total Petro. Hydrocarbons as Gasoline CLIENT: WZI INC PO BOX 9217 Bakersfield, CA 93389 Attn: Steve Muir Project Name: Leo Black Estate Date Sampled: O9/19/95 Date Received: O9/21/95 Date Started: 09/25/95 Date Completed:09/29/95 Sampled By= Allen Waggoner Lab Report ~: H5092224 BTEX TPH-Gasoline RESULTS: EPA 8920 '-- EPA 5030/8015(M) ug/Kg mg/Kg Ethyl Total Benzene, Toluene, Benzene. Xylene TPH PH5092581 ND<3 ND<3 ND<3 ND<3 ND<I LB-MW3-3 PH5092582 ND<3 ND<3 ND<3 ND<3 ND<I LB-MW4-3 ~ PH5092553 ND<3 ND<3 ND<3 ND<3 ND< 1 LB-MW1 -GRAB I PH5092584 ND<3 ND<3 ND<3 ND<3 ND<I LB-MW2-GRAB PH5092585 NO<3 ND<3 ND<3 ND<3 ND<I LB-MW3-GRA8 PH5092586 ND<3 ND<3 ND<3 ND<3 NO<I LB-MW4-GRAB Gloria Poling Laboratory Director 0FFICE:(209) 667-5258 · FAX:(209) 667-2581 · BBS:(209) 557-4119 Sherw ood C T I O N .... - , 09/29/95 OHS Certification .~: 1400 ANALYSIS REPORT: Total Recoverable Petro. Hydrocarbons CLIENT: WZI INC PO BOX 9217 Bakersfield, CA 93389 Attn: Steve Muir Date Sampled: 09/19/95 Project Name: Leo Black Estate Date Received: 09/21/95 Date Started: 09/25/95 Sampler: Allen Waggoner Date Completed:09129~95 Lab Report #: H5092224 RESULTS: TEPH-Diesel, Keros.ene, Dielectric and Motor Oils EPA 3540/8015(M) mg/Kg PH5092581 ND<5 All Analytes LB-MW3-3 PH5092582 ND<5 All Analytes LB-MW4-3 ', PH5092583 15 Motor Oil Range Organics LB-MW1-GRA8 PH5092584 55 ~lotor Oil Range Organics LB-MW2-GRAB 27 Diesel Range Organics t!~'! PH5092585 ND<5 All Analytes LB-MW3-GRAB PH5092586 27 Motor Oil Range Organics " LB-MW4-GRAB 20 Diesel Range Organics Gloria Poi ing L'aboratory Director OFFICE: ,(209) 667-5258 · FAX: (209) 667-2581 · 885: (209) 667-4119 APPENDIX VII Labs SherwOod 0 CT - 9 1995 607~ NORTH LANDER AVENUE P.O. BOX 937 C 0 R P 0 Fi A r I 0 N WZl INC, HILMAR, CAUFORNIA95324 1~/~4/95 DHS Certification ~ 14~ ANALYSIS REPORT: BTEX/Total Petro. Hydrocarbons as Oasol CLIENT: WZI INC PO BOX 9217 Bakersfield, CA 93389 Attn: Steve Muir Project Name: Leo Black Estate Date Sampled: 09/27/95 Date Received: 10/03/95 l!i! Date Started: 10/03/95 ,.. Date Completed:lO/04/95 Sampled By: Allen Waggoner Lab Report #: H5100303 BTEX TPH-Gasoline RESULTS: EPA 602 EPA 5030/8015(M) yg/L Fg/L Ethyl Total Benzene, Toluene, Benzene, Xylene TPH PH5100467 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 LB-MW1-1 " PH5100468 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 LB-MW2-1 'PH5100469 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 · ~ LB-MW3-1 I::~ i PH5100470 ND<.3 ND<.3 ND<.3 ND<.3 ND<50 LB-MW4-1 Gloria Poi lng Laboratory Director OFFICE: (209) 667-5258 · FAX: (209) 667-2581 · BBS: (209) 667-4119 SherwOod I lLabs ,x C 0 R P 0 R A T I 0 N HILMAR, CALIFORNIA 95324 10/04/95 DHS Certitication #: 1400 ANALYSIS REPORT: Total Recoverable Petro. Hydrocarbons CLIENT: WZI INC PO BOX 9217 Bakersfield, CA 93389 Attn: Steve Muir Date Sampled: 09/27/95 ProJect Name: Leo Black Estate Date Received: 10/03/95 Date Started: 10/03/95 Sampler: Allen Waggoner Date Completed:lO/04/95 Lab Report #: H5100303 RESULTS: TEPH-Diesel, Kerosene, Dielectric and Motor Oils EPA 3510/8015(M) ~g/L ,' PH5100467 ND<50 All Analytes LB-MW1-1 PH5100468 ND<50 All Analytes LB-MW2-1 PH5100469 ND<50 All Analytes LB-MW3-1 PH5100470 ND<50 All Analytes ~ 'LB-MW4-1 Gloria Poi lng Laboratory Director OFFICE: (209) 667-5258 · FAX: (209) 667-2581 · BBS: (209) 667-4119 ~._. 3 _ 86OF (30oc) 0 2 ~~ / /68°F (20°C-j = 'r ~. ~ '50°F (10°C) ¢oo¢) 0 1000- 2000 3000 SURFACE AREA OF SOIL PILE OR SOIL LAYER (fl2) ESTIMATED SOIL EXCAVATION AIR EMISSION RATES FOR BENZENE 4700 Stockdale Highway, Suite 120 Post Office Box 9217 Bakersfield, California 93389 805/326-1112 805/326-0191 FAX // ". '-,.:-" ' I'.': ! 2 , ~"~'... W:7! ~/t ,'.~,~:.r,, ..~. /.~-.. ' ,.., ~....-.~ /, March 16, 1995 ~~'x....,~/ Ms. Dolores Gough Kern County Environmental Health Services Department 2700 "M" Street, Suite 300 Bakersfield, California 93301 Re: Leo Black Electric Site Work Plan Dear Ms. Gough: Pursuant to your request, enclosed please find a copy of the Workplan to Conduct Site Assessment and Interim Remedial Action for Hydrocarbon Contaminated Soil and Groundwater for the Leo Black Electric site located at 3909 Pierce Road, Bakersfield, California. Upon your approval of the workplan, the Leo Black Estate will send out bid packages for selection of a qualified contractor/consultant in accordance with the requirements of the State of California SB 2004 UST Cleanup Fund. Please do not hesitate to contact me if you have any questions or require additional information. Very truly yours, ~/~en~a~goner Staff Geologist AW/er Enclosure cc: Ms. Donna Roberts 02060010.025 B;kersfield 4700 Stockdale Highway, Suite 120 Post Office Box 9217 Bakersfield, California 93369 805/326-1112 605/326-0191 FAX LEO BLACK ELECTRIC 3909 PIERCE ROAD BAKERSFIELD, KERN COUNTY CALIFORNIA Workplan to Conduct Site Assessment and Interim Remedial Action for Hydrocarbon Contaminated S0il and Groundwater February 1995 Prepared for: Leo Black Estate c/o Ms. Donna Roberts 1004 Lorene Avenue Oildale, California 93308 Prepared by: WZI Inc. 4700 Stockdale Highway, Suite 120 Bakersfield, California 93309 Submitted to: Kern County Department of Public Health Environmental Health Services Department 2700 "M" Street, Suite 300 Bakersfield, California 93301 Stephen G. Muir Certified Engineering Geologist State of California No. 1224 Expiration Date: 06/30/96 02060010.019 TABLE OF CONTENTS Page 1.0 INTRODUCTION .... 1 2.0 WORKPLAN TECHNICAL APPROACH ........................... 7 3.0 ON-SITE HEALTH AND SAFETY ................................ 18 4.0 REFERENCES ............................................. 19 EXHIBITS Exhibit 1 Location Map EXhibit 2 Detail Map of Underground Storage Tank Site EXhibit 3 Cross-Sections A-A' and B-B' Exhibit 4 Site Activity Map Depicting Excavation and Soil Borings on Both the Leo Black Estate and Reed Properties Exhibit 5 Map Depicting Locations of Proposed Soil Borings and Groundwater Monitoring Wells EXhibit 6 Proposed Monitoring Well Design TABLES Table I Laboratory Analyses Summary, Excavation Samples Collected 7/26/93 through 8/6/93 Table 2 Laboratory Analyses Summary, Excavation Samples Collected 2/10/87 through 1/17/91 APPENDICES Appendix I WZl 1987 Summary-Report Appendix II WZl 1993 Summary Report Appendix III Health and Safety Plan Appendix IV Exploratory Excavation and Soil Boring Sampling Protocol Appendix V Groundwater Sampling Protocol ~r~l iNC 1.0 INTRODUCTION This workplan is to conduct a soil and groundwater hydrocarbon contamination site characterization investigation and interim remedial action for the Leo Black Electric property located at 3909 Pierce Road, Bakersfield, California (Exhibit 1). Leo Black Electric was a commercial/industrial business which sold and repaired electric motors and associated equipment at the site from 1956 to 1985. A 500 gallon underground storage tank was installed on the property during 1956. The tank was located in the northeast corner of the property, immediately adjacent to the northern property boundary. This tank was used intermittently over a 30 year period to store gasoline fuel. The tank was taken out of operation when Leo Black Electric diScontinued operations at this property in 1985. The Leo Black Electric property is part of the Leo Black Estate which is administered by Mr. Tom Gilbert and Ms. Donna Roberts. McNabb Construction removed the underground tank on February 10, 1987. Significant soil hydrocarbon contamination was found to be present in analytical samples collected at depths of 2 and 5 feet below the bottom of the tank. A site characterization workplan was directed by Kern County Environmental Health Services Department (KCEHSD) to be prepared for both soil and groundwater. WZl conducted a preliminary site soil characterization during July 1987. A copy of the report of this investigation is as Appendix borings contained I. Five were advanced to a depth of approximately 15 feet below ground surface in the immediate vicinity of the former underground storage tank location. Soil samples collected from the borings were analyzed for total volatile hydrocarbons, benzene, toluene, ethlybenzene and xylene. In addition, the soil samples were analyzed for oil and grease content. The soil samples were submitted to a California certified, analytical laboratory for analyses. Analytical results reported for the soil samples indicated the presence of hydrocarbon constituents at maximum levels as follow: total volatile hydrocarbons (10,075 mg/kg); benzene (31.55 mg/kg); toluene (909 mg/kg); ethylbenzene (323 mg/kg); xylene (2,005 mg/kg); and oil 02060010,019 1 and grease 858 mg/kg. The soil borings indicated that approximately 600 cubic yards of hydrocarbon contaminated soil were present in the subsurface beneath the former underground storage tank location to a depth of at least 15 feet below ground surface. The soil borings were not advanced to any greater depth because groundwater was encountered at approximately 15 feet below ground surface. This depth to groundwater is consistent with Kern County Water Agency (KCWA) reports for the period of 1986 which indicated very shallow ground water to be located in this portion of the City of Bakersfield (KCWA, 1987). It is possible that the groundwater encountered may have been a perched groundwater aquifer above the unconfined groundwater aquifer being located at a greater depth. A workplan to delineate the vertical and horizontal extent of the soil hydrocarbon contamination on the Leo Black Estate property was developed by WZI in 1990. This workplan was designed to remove the identified contaminated soil by excavation and at the same time complete the delineation of the vertical and horizontal extent of the hydrocarbon contaminated soil. An attempt was made at that time to gain access to the property located immediately north of the site which was then owned by Grossman's Inc. with the intent of evaluating the presence of hydrocarbon contamination that may have extended onto the property from the Leo Black site. No access agreement was made between the parties. Approximately 2,700 cubic yards of soil was excavated from the subsurface of the Leo Black 1991. Approximately 660 cubic yards of the excavated soil property during January was considered to be contaminated by hydrocarbon compounds. The hydrocarbon contaminated soil was stockpiled on a remediation pad located on the west end of the parcel. ~l~maining clean soil was stockpiled adjacent to the excavation//Analytical results from soil samp obtained from the sidewalls and bottom of the excavation indicated that additional hydrocarbon contaminated soil was still present within the subsurface within the c~pnfines of the excavations. An amended site characterization workplan was submitted to KCEHSD during 1993 to remove the remaining hydrocarbon contaminated soil from the Leo Black Estate property and the adjoining Reed Property located immediately to the north. This workplan was approved during March 1993 and an agreement was made between the Leo Black Estate and the owners of the Reed Property to allow access for excavation and remedial action operations. All of the hydrocarbon contaminated soil removed during the 1991 remedial action was sampled for hydrocarbon content. All soil samples from the remediation pad were reported to be below analytical detection limits. Approval was granted from KCEHSD to use the remediated soil as backfill for future operations. The additional excavation of hydrocarbon contaminated soil was conducted by WZI between July 26 and August 6, 1993. The maximum areal extent of the excavation extended approximately 30 feet north of the property line onto the Reed parcel. A total of 3,000 cubic yards of clean and hydrocarbon contaminated soil was removed during the 1993 excavation effort. Approximately 1,000 yards of this soil consisted of hydrocarbon contaminated soil.. This soil was removed from the eXcavation and stockpiled on remediation pads constructed on the Leo Black property. The vertical extent of the hydrocarbon contaminated soil was found to be present from approximately 15 feet below ground surface to a maximum depth of 45 feet below ground surface immediately below the former underground storage tank location. 1.. results from the soil collected from the deeper portions of the 1993 Analytical samples excavation were reported to have the following hydrocarbon constituents: total petroleum · hydrocarbon as gasoline (430 my/kg); benzene (below analytical detection limits); toluene (below analytical detection limits); ethylbenzene (below analytical detection limits); xylene (below analytical detection limits). In addition, total petroleum hydrocarbon as diesel fuel was reported at maximum concentrations of 680 my/kg. Groundwater was present in the bottom of the excavation at a depth of approximately 45 feet below ground surface. The water appeared to have a brown color with a petroleum sheen on its surface and a strong hydrocarbon odor. A single grab sample of the 02060010.019 3 groundwater was collected. Analytical results from the groundwater sample were reported to contain the following hydrocarbon constituents: total petroleum hydrocarbon as diesel fuel (2,300/~g/I); benzene (below analytical detection limits); toluene (below analytical detection limits); ethylbenzene (below analytical detection limits); xylene (280 "'7 Io~ pg/I). Total petroleum hydrocarbons as gasoline were reported t° be..2,300-#g/I. The location and analytical results of the soil samples collected during the previous investigative efforts are depicted on Exhibit 2. Analytical results as well as the projected limits of the subsurface gasoline contamination are depicted on the cross-sections, Exhibit 3. Tables 1 and 2 summarize all of the analytical results for the Leo Black The 1993 WZl report concluded that all significant hydrocarbon contaminated soil had been removed from the subsurface of the Leo Black property and the adjoining portion of the Reed Parcel. The recommendations contained in the 1993 WZI report included: (1) remediation of excavated hydrocarbon contaminated soil by on-site controlled aeration and; (2) backfill the existing excavation with the remediated soil and clean fill dirt as necessary. No groundwater site characterization was recommended to be conducted for the Leo Black property at the time the WZI report was prepared based on the knowledge that an area of approximately 25 square miles of this portion of the city of Bakersfield is underlain by contaminated groundwater from a number significant of industrial sources which include nearby oil refineries. In addition to the numerous groundwater contamination source sites in the vicinity of the Leo Black property, it was discovered during 1994 by WZI personnel that the adjoining Reed Parcel, then owned by Grossman's Inc. was the.former site of a truck refueling facility and had also been the subject of at least one soil and groundwater site investigation. WZI personnel discovered in 1994 that Krazan and Associates had drilled four soil borings and one temporary monitoring well on the Reed Property during the first six months' of 1991. The locations of the soil borings were reported on a site map that 02060010.019 4 was submitted by AquaGeosciences Inc. to the City of Bakersfield Fire DePartment as part of a tank abandonment plan application. The locations of the soil borings and temporary monitoring well drilled by Krazan and Associates are depicted on Exhibit 4. The KCEHSD was unaware of any permits for the soil borings or the temporary ""7' monitoring well nor was any data from the soil borings or monitoring well submitted' 'to KCEHSD from Krazan. The temporary monitoring well was abandoned prior to Julys/_.' ' 1993. Two 8,000 gallon gasoline and diesel underground storage tanks were removed from the subsurface of the Reed Parcel during September 27, 1991 by Kern Environmental Services under the direction of AquaGeosciences Inc. and under the oversight of the Bakersfield City Fire Department. Analytical results from soil samples obtained from under the tanks located on the Reed Parcel were either below detection limits for hydrocarbon constituents or were reported to be below 1 mg/kg. A closure letter was issued by the City of Bakersfield Fire Department to Grossman's Inc. on October 7, 1991 based on the analytical data. No further action was required to be taken by Grossman's Inc. The California Regional Water Quality Control Board-Central Valley Region (CRWQCB- CVR) was petitioned by counsel representing the Leo Black Estate to release the Leo Black Estate from having to conduct the groundwater portion of the site characterization because of the area-wide groundwater problem. The petition was based on the precept that the Leo Black Estate was a very minor contributor, if any, to the regional degradation of the groundwater compared to the significantly larger potential source points in the vicinity such as oil refineries. The CRWQCB-CVR staff elected to not issue a waiver to excuse the Leo Black Estate from conducting a groundwater site assessment of the property. KCEHSD has instructed the Leo Black Estate to proceed with the groundwater phase of the site characterization. 02060010.019 5 This workplan is designed to provide the framework for a final soil and groundwater site assessment investigation in light of the discovery of a previously unknown potential soil and groundwater hydrocarbon contamination source point located immediately adjacent to the Leo Black Property. The workplan will also outline the-specific and limited interim remedial action to be conducted on the site, It is anticipated that certain elements of this workplan will be amended or modified as additional information is developed. All work outlined in this workplan will be submitted for reimbursement to the State of California underground Storage Tank Cleanup Fund program as provided in Senate Bill 2004 (SB-2004). The Leo Black Estate property is currently in the Underground Storage Tank Reimbursement Fund and is contained on the "A" category. All elements of the' work outlined in the project tasks will be placed out to bid to at least three qualified consultants and contractors, A bidding process which will include completion and submission of Invitation For Bid (IFB) packages to interested contractors and consultants will be prepared by the Leo Black Estate. The completed IFB will outline specific elements of work identified by Task numbers, Bid Packages will be completed by potential contractors and consultants and returned to the Leo Black Estate, The contract award will be based on criteria set forth in the SB-2004 criteria for bid award. All work conducted for this project will be done in accordance with provisions for the reimbursement program 'which will include detailed notes on invoices and billing procedures. 02060010,019 6 2.0 WORKPLAN TECHNICAL APPROACH Nearby off-site occurrences of soil and groundwater hydrocarbon contamination have been confirmed in conversations with CRWQCB-CVR personnel, KCEHSD personnel, and review of reports from environmental consultants prepared for nearby properties that have been identified as containing hydrocarbon contaminated soil and/or groundwater. The horizontal and vertical delineation of soil and groundwater hydrocarbon contamination at the 3909 Pierce Road site has not been determined at this time. Nearby properties that represent potential off-site sources of hydrocarbon contaminated groundwater will likely influence the location and ultimate number of groundwater monitoring wells that will be drilled on the Leo Black Estate parcel. The sequencing of tasks identified in this workplan is designed to comply with the LUFT Assessment and Remediation Guidelines (CRWQCB, 1989), the Tri-Regional Board Guidelines for Site Investigations (CRWQCB, 1991) and the Requirements for Permanent Closure of Underground Hazardous Substance Storage Tanks (KCEHSD, 1993) while at the same time focussing on the compilation and integration of data from the nearby and adjacent soil and groundwater hydrocarbon contamination sites. TASK 1: SITE BACKGROUND INVESTIGATION ! ~,"'-[~ The purpose of Task I Site Background Investigation is to obtain the necessary background technical information available for the subject parcel and surrounding · properties that may impact any site assessment or remediation activities. The proposed background investigation will follow protocols approved by the KCEHSD and the California Regional Water Quality Control Board Tri-Regional Board Guidelines for investigations (1991). The investigation will include a review of documents regarding the site and its vicinity. It will also summarize the available data and will present a series 02060010.019 7 of work items performed to provide the data necessary to evaluate the source or sources, nature, and extent of contamination in the soil and groundwater on the property. Specific topics to be addressed in the investigation will include the following items: Site History -'A detailed review of previous and current site activities and uses will be conducted. Available historical aerial photographs taken of the site will be obtained and evaluated to document past activity. These aerial photographs will be presented as part of the technical report of this investigation. Present and past activity an adjacent properties and previous work by other consultants and contractors will be reviewed. The laboratory data generated from previous sampling work on the subject property will be presented along with the sampling locations, sampling methods, chain of custody forms, and quality control procedures. This background section will be used in subsequent technical reports after this phase of the investigation is complete. Index or Location Map - A location map showing the vicinity of the site and cultural features, nearby groundwater wells, surface water bodies and major drainages will be prepared. This map will be displayed at an appropriate scale to depict all relevant data. Site Activity Map - A site activity or plan map indicating all structures, roadways, overhead power lines, topographic features, drainage, systems, local surface sewer and existing excavations on the site and immediately surrounding area Will be prepared. Known and potential contamination sources, including existing or previous locations, piping runs, tank rock wells, and leach fields will be included. The location of all existing subsurface information (cross-sections, boring or well logs, logs of trenches) will be plotted on the map. The map will be of sufficient detail and scale to depict all of the pertinent data. Review of Adiacent Properties - A review of all local, state, and federal data bases to identify any adjoining properties reported to have contaminated soil and/or groundwater will be conducted. These sites will be researched and pertinent data that may affect this investigation will be reviewed and discussed. A map showing the location of significant properties with identified or potential contamination will be prepared. 02060010.019 8 VVZl INC Quality Assurance/Quality Control - Quality control/quality assurance procedures necessary to ensure that an accurate representation of the site is obtained will be described. These quality control assurances will include: (1) the names and qualifications of the professional consultants and contractors involved in the investigation; (2) approved equipment decontamination procedures; (3) sample quality assurance program; and (4) the disposition of contaminated materials. All down-hole and sampling equipment will be decontaminated to prevent the cross-contamination or masking of possible soil and/or groundwater contamination. Sample quality assurance includes: (1) the use of a California state-certified laboratory; (2) proper sample handling and transport methods; and (3) acceptable analytical methods and detection limits. Sample quality assurance checks will include the use of sample blanks, duplicates, and chain of custody records. Proiect Schedule of Operations - A scheduling plan which will show the anticipated elements of work and their duration and completion times will be prepared. Soil Borin.q, Groundwater Monitoring Well, and Other Required Permits - The permits 'required to be issued for the various elements of the projects will be identified, submitted to appropriate agencies, and approved prior to any work being initiated. Copies of these permits will be kept for documentation into the technical reports. Workplan Amendments - Information that is discovered during the Task 1 effort may require modification of the initial workplan. The project consultant and/or contractor will prepare any amendments to the workplan that are found to be necessary during the course of the investigation and resubmit the document to KCEHSD for review and approval. 02060010.019 9 TASK 2: SOIL BORING, EXPLORATORY TRENCHING, AND MONITORING WELL INSTALLATION Subsurface utility clearance and facility mapping will be conducted on the site prior to any subsurface exploration. This effort will utilize a geophysical consultant or contractor who will provide clearance services using the following methods w.h_ere appropriate: (1) electromagnetic induction survey; (2) ground penetrating radar; (3) vertical gradient magnetic survey; and (4) cable detector survey. The utility clearance and mapping effort will coordinate Underground Service Alert clearance and mapping activities on the subject property. A map of the site at a scale of 1 inch equals 40 feet, or as appropriate, will be prepared that will indicate all mapped subsurface utility and facility locations. Locations of subsurface utilities will be marked on the property ground surface using standard Underground Service Alert color marking codes for subsurface utilities. It is anticipated that approximately~boring~s ill be advanced to the groundwater surface or approximately 45 feet below grade in locations around the south and west perimeter of the exc. avation site. Exhibit 5 depicts the location of three of the proposed soil borings. The locations may change depending on the results of the investigation outlined in Task 1. Additional soil borings may be required depending on the analytical results obtained from the first three soil borings. Prior to implementation boring of the soil program, a health and safety program will be reviewed with all personnel. A health and safety plan has been developed using the previously obtained soil analytical data and it has been determined that an OSHA health and safety Level "D" environment will be present on the project. This health and safety plan is presented in Appendix III of this workplan. This plan may be modified as additional information is developed during the investigation. The soil borings will be drilled using a drilling rig equipped with a minimum 8-inch diameter hollow-stem auger. The drilling contractor will have at a minimum a California 02060010.019 10 Contractor License Board C-57 specialty license with a hazardous materials removal specialty. Soil samples will be collected at 5-foot intervals or as appropriate and at lithologic contacts in all borings using a California modified-split-spoon sampler fitted with clean brass sleeves. Soil samples designated for possible laboratory analysis will be sealed and placed in iced storage. A soil sampling protocol is presented in Appendix IV. A photoionizing organic vapor meter (OVM) will be used during sampling to detect potential ..... ' hydrocarbon concentrations in the soil samPles and drill cuttings. Selected soil samples from the borings will be analyzed as appropriate for total petroleum hydrocarbon as gasoline and d~using U.S. Environmental Protection Agency (USEPA) Test Method 8015 (modified) and for benzene, toluene, ethyl benzene, and xylene (BTEX) using USEPA Test Method 8020. In addition, a select number of samples which will include the highest-concentrations of total petroleum hydrocarbons will be analyzed for soluble or leachable concentrations of lead. Other test methods may be designated by KCEHSD as appropriate. These analyses will be performed by a California state-certified analytical laboratory. The groundwater phase of the site assessment investigation will include the installation of approximately four groundwater monitoring wells on the property. Additional wells may be required to define the lateral and vertical extent and flow gradient of the contaminated groundwater. Hydropunch and/or temporary groundwater monitoring wells may be utilized to help establish lateral delineation of the contaminated groundwater without establishing permanent groundwater monitoring wells. Exhibit 5 depicts the four proposed locations of the groundwater monitoring wells. These locations may change depending upon the results of the investigation outlined as Task 1 and results of the soil borings. 02060010.019 11 The groundwater monitoring wells will be drilled using a drilling rig equipped with a minimum 8-inch diameter hollow-stem auger and capable of completing a 2-inch diameter monitoring well. The monitoring wells will be constructed using flush-jointed, 2-inch diameter, schedule 40 polyvinyl chloride (PVC) casing. No chemical cement, glue, or solvent will be used in the well construction. The base of each well will be tiffed with a PVC plug. The screened portion of the well will consist of factory-perforated casing with 0.01 O-inch-wide slots or as appropriate. The well screen will be set through the augers and will extend from the total depth of the monitoring well (approximately 65 feet below ground surface) to aPproximately 5 feet above the groundwater surface at the time the well is installed. This will allow sampling near the air/water interface in the completed zones during seasonal fluctuations of groundwater elevations. The annular space of the well will be packed with #212 sand or its equivalent to a point approximately 1 foot above the top of the perforated casing. A two-foot thick plug consisting of bentonite pellets or chips will be placed above the sand to prevent cement from entering the sand pack and to insure annular integrity. The remaining annulus will be backfilled to the surface with a mixture of neat cement and powdered bentonite (less than 5%) or as directed by KCEHSD personnel. A cast-aluminum utility box with a PVC apron will be placed over the well head and set in concrete flush to slightly above the surrounding grade. Utility boxes should have a watertight seal to protect against surface-water infiltration. The cover to the box will include countersunk bolts which require a special wrench to remove. The well head will /'~! be fitted with a locking well cap to protect against unauthorized disturbance of the we~o This design will discourage vandalism and reduces the possibility of accidental disturbance of the well. Exhibit 6 depicts a schematic of the proposed monitoring well construction design. 02060010,019 12 If hydropunch technique is used to establish the vertical and lateral extent of contaminated groundwater, all holes will be logged and sampled under the direction of a California Registered Geologist. Temporary monitoring wells may be utilized to obtain soil and groundwater samples using the sampling protocol outlined for the soil borings and monitoring wells above. Logs will be prepared for each soil boring and/or exploratory trench, monitoring well, hydropunch and/or temporary monitoring well and will depict the lithologies penetrated, analytical sample locations, OVM readings, and descriptions of any contamination encountered.' These logs will include a description of drilling methods and sampling techniques. All geological work will be conducted under the oversight of a State of California Registered Geologist. All geologic logs and associated field work will be conducted in accordance with standards established by the Tri-Regional Board Guidelines for Hydrocarbon Site Assessment and Remediation (CRWQCB, 1991). After each monitoring well is constructed, an inspeCtion will be conducted by lowering a clean bailer to the groundwater surface and retrieving a groundwater sample. The water in each monitoring well will be examined for floating petroleum product, sheen, or odor. If floating product is detected, the well will not be developed or sampled. If the well does not show floating product, it will be developed by surging with a vented surge block and pumping unit until approximately 3 to 5 well volumes are purged and stable field readings of pH, specific conductivity, and temperature are obtained. After groundwater returns to approximately 90% of static groundwater elevation, the well will be sampled using a clean bailer and the water will be transferred to laboratory-sterilized glass receptacles. Groundwater samples will be analyzed for total petroleum hydrocarbons as gasoline and diesel fuel using USEPA Test_ Method 8015 (modified) and for BTEX using USEPA Test Method 602. Purged groundwater and drill cuttings will be stored on-site in 55-gallon drums and/or placed on the preexisting soil remediation pile located on the property. 02060010.019 13 Wellhead elevations and horizontal coordinates will be surveyed using appropriate methods to an accuracy of 0.01 foot vertical and 0.1 foot horizontal. All elevations will be tied to a U.S. Coast and Geodetic Survey or U.S. Geological Survey bench mark. All survey notes will be provided including distances measured and any vertical or horizontal angles measured. 'All surveying work will be conducted under the oversight of a State of California Registered Civil Engineer or Land Surveyor. TASK 3: LABORATORY ANALYSIS Soil samples will be analyzed for total petroleum hydrocarbons as both gasoline and diesel fuel using USEPA Test Method 8015 (modified) and BTEX using USEPA Test Method 8020. Groundwater samples will be analyzed for total petroleum hydrocarbon as gasoline and diesel fuel and BTF_X by USEPA Test Method 602. All analyses will be performed by a California certified analytical laboratory. TASK 4: GROUNDWATER QUARTERLY MONITORING This task will' include the quarterly monitoring of the four (4) groundwater monitoring wells. Specific elements of work will include measurement of groundwater elevations, water temperature, pH, and electrical conductivity in each of the monitoring wells. Water samples will be obtained using the protocol outlined in Appendix V of this workplan. Water samples will be analyzed using USEPA Test Methods 8015 (modified) and 602. Additional tests may be required by KCEHSD. A report will be prepared for each quarter and will include a groundwater surface map and isoconcentration maps for select analytical results from water samples with all basic analytical data posted adjacent to the sampling points. All analytical results will be submitted in the report along with a chain of custody document. 02060010.019 14 TASK 5: REMEDIATION FEASIBILITY STUDY A remediation feasibility study will be initiated after the vertical and horizontal extent of hydrocarbon contaminated soil and groundwater has been identified. The remediation feasibility study will include a review of applicable 'soil and/or groundwater remediation technologies that are available and/or cost-effective. It is anticipated that these will include': (1) soil vapor extraction; (2) groundwater pump and treat; (3) air-sparging; (4) · .,. ;-%~,' ~ ,~..~-~,, overexcavat~on and on-site surface remediation; (5) excavation and off-site disposal; and (6) no action alternative. A soil vapor extraction test to assess the applicability of a vapor extraction system to remove organic volatile compounds from the subsurface soil ~ay be conducted. This test will allow determination and design of a potential soil vapor extraction system. Overexcavation and on-site remediation of hydrocarbon contaminated soil will be evaluated for cost-effectiveness, A groundwater pump test may be conducted to determine the flow characteristics of the aquifer and the nature of the extracted groundwater in order to design an appropriate groundwater treatment system, if feasiblel a joint soil and groundwater remediation system may be designed and evaluated (air sparging and/or parallel vapor ventilation and groundwater pumping). Overexcavation and surface remediation of contaminated soil will also be evaluated in terms of cost- effectiveness. A final option of remediation will include excavation and off-site disposal. A no-action alternative that would include a Health Risk Assessment will also be evaluated. The results of the Remediation Feasibility Study will be evaluated to determine the most cost-effective method for remediation of both the hydrocarbon contaminated soil and groundwater. The results of the study will be included within the Problem Assessment Report. It is anticipated that a Corrective Action Plan (CAP) will be prepared using the findings of the Remediation Feasibility Study. If practical, this CAP will be prepared and incorporated as part of the Problem Assessment Report. All remedial action will be approved by the KCEHSD prior to implementation. 02060010.019 15 TASK 6: INTERIM REMEDIAL ACTION Interim remedial action which will include the on-site aeration and sampling of the previously excavated hydrocarbon contaminated soil will be conducted on the site. The hydrocarbon contaminated soil will be bioremediated by controlled aeration in order to remove any remaining volatile organics. Once the contaminated soil has been verified ' to be clean, as evidenced by analytical soil sampling, the remediated soil will be placed / into the excavation as backfill. Prior to aeration, a permit will be obtained, if deemed necessary, from the San Joaquin Valley Unified Air Pollution Control District. In the event that the hydrocarbon contaminated soil cannot be remediated on-site by aeration or it is likely to be more cost effective to dispose of the soil off-site, then the soil will be transported to a licensed hazardous waste disposal or recycling facility. Additional backfill material will be imported to complement'the remediated soil in order to bring the excavation up to grade. It is estimated that approximately 1,500 cubic yards of clean fill will be required in addition to the' available on-site soil to fill the excavation. Backfill material will be compacted to 90% of maximum field density or as directed by the City of Bakersfield Department of Public Works. TASK 7: REPORT PREPARATION be to meet the requirements of a Quarterly Brief letter reports will prepared quarterly Status Report (QSR) for KCEHSD which will describe the field and analytical methods used, present the results of field and laboratory analyses, and contrast the recent data set with previous data each quarter. The reports will include a site location m__ap, a site plan map, and groundwater potentiometric surface maps. Where possible, all analytical data will be posted on cross-sections and maps to expedite regulatory agency review. The QSR will be prepared and signed by a California Registered Geologist or Registered Civil or Geotechnical Engineer. 02060010.019 16 Once the vertical and horizontal extent of the hydrocarbon contaminated soil and groundwater has been delineated and the remedial feasibility testing is complete, appropriate remedial alternatives and recommendations will be presented in a Problem Assessment Report (PAR). The PAR will include all basic data elements of the investigation to include the Remediation Feasibility Study and if practical, the proposed Corrective Action Plan. The PAR Will be prepared in accordance with both KCEHSD and CRWQCB standards for technical reports. The PAR shall include an executive summary of all investigation activities and results, a cumulative tabulation of all soil and groundwater data, plan views of the extent of soil contamination and groundwater contamination showing isoconcentration lines, piezometric maps, cross sections, boring logs and monitoring well construction diagrams, laboratory data sheets, and any recommendations of further work if warranted. Where possible, all analytical data will be posted on maps and cross- sections to reduce regulatory agency review time. All reports will be signed by a California Registered Geologist or Civil or Geotechnical Engineer, as required by the CRWQCB. It is anticipated that progress meetings with KCEHSD and CRWQCB staff will occur on at least a six month basis. TASK 8: ADMINISTRATIVE REPORTING Administrative reporting will be provided to the Leo Black Estate on a monthly basis. This will include a summary of all expenses and identification of costs that may be applied for reimbursement through the California State Underground Storage Tank Reimbursement Fund. A cost summary report will be prepared monthly or as appropriate for submission to the Reimbursement Fund. This Task will also provide accounting assistance in the event additional detail is needed 'to substantiate claims for work conducted on the project. 02060010.019 17 3.0 ON-SITE HEALTH AND SAFETY All on-site contractors will comply with the health and safety procedures outlined in Appendix III. Based on the data developed during the tank removal, this project should be designated as a Level D site assessment for the purposes of protective equipment and clothing. Hard hats and chemically resistant boots will be worn at all times on the site. Half-mask respirators tiffed with organic vapor cartridges will be available onsite for each individual. A Site Safety Plan for field investigations which contains the names and telephone numbers of emergency response personnel, locations of nearby hospitals and tire stations will be available onsite. A discussion of potential chemical hazards will also be included in the Site Safety Plan. All field personnel will be familiarized with the Site Safety Plan and be required to possess an Occupational Safety and Health Administration approved 40-hour training certificate. Contractor personnel will be trained in basic first aid and a first aid kit will be available onsite in case of an emergency. At least one onsite contractor employee will be trained in CPR. Before beginning work each morning, a Safety Meeting will be held with contractor personnel to explain onsite safety precautions and emergency response. A written record of each meeting signed by those attending will be kept by the site manager. Air quality around the drill sites or excavation sites will be monitored continually with an organic vapor meter (OVM). During excavation, OVM readings will be taken at the excavation/ground surface interface and at the operators chest level. If the OVM reading remains at 5 parts per million (ppm) for a prolonged period of time around the excavation or drill hole, the operators will be required to don an organic vapor respirator. A "hot zone" will be established around the excavation site to limit non-essential personnel from entering the work area. Good housekeeping will also be practiced at all times while onsite. 02060010.019 18 VVZl 4.0 REFERENCES California Regional Water Quality Control Board, 1991, Tri-Regional Guidelines for Hydrocarbon Site Assessment and Remediation. California State Water Resources Control Board, 1989, LUFT Field Manual Revision for Leaking Underground Fuel Tank Field Manual: Guidelines for Site Assessment, Cleanup, and Underground Storage Tank Closure, 77 p. Kern County Department of Environmental Health Services, 1993, UT-30 Handbook, Requirements for Permanent Closure of Underground Hazardous Substance Storage .Tanks: Kern County Department of environmental Health Services, Hazardous Materials Management Program, Publication, 17 p. Kern County Water'Agency, 1987, Water Supply Report 1986: Kern Water Agency Annual Report 70 P. United States Environmental Protection Agency, September, 1986, Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846. Wilson Zublin Inc. (WZI Inc.), 1987, Leo Black Electric Site Characterization: Unpublished Consulting Report, 3 p. WZl .inc., 1990, Leo Black Estate Site Remediation Work Plan Revised Technical Approach: Unpublished Consulting Report. WZl Inc., 1993, Leo Black Estate Summary of Excavation and Remediation of Contaminated Soils: Unpublished Consulting Report, 8 p. 02060010,019 19 · G - ND o 32 X × ~ X X' A '!'"'. ~,,.1,.~. ' ~ ~"-~- "" ~ ~-.o : ~,,-,~ r ~ ~-.o I~ ' ~ ro~u~- ~, I ' ': ~ PROPER~ O&G.~ J ELE~RICAL E : B~ERSFIELD, CALIFORNIA LEGEND a~ LEO B~CK E~CTRIC , + L~tion and depth of soil sample ~11~ 7~3 ~pmxi~te I~tion of tempora~ mon~ofing well ~-1 DETAILED MAP OF Lo~tion a.d .umber o~ ~o, bo,.g 7~7 UNDERGROUND o ~o' ~o' STORAGE T~K S~E Location of soil samples colle~ed beneath fo~r UST, ~87 SCALE IN FEET ~TE ~95 10206.0010AI EXHIBIT I I ~UILOING ASPHALT ~B.2 REED PARCEL FormerlocatlonofeOOOgallon r~ ~'~ gasoline & 6000 gallon dlelel ~ { II B. 4 undorgro~nd ~tomge tank, ~LJ U ~) "'""" °'-I ..................... --- 6:.,-~.- ~'- ,~,, ,,'W~,, ., ,,T, ~'~'~;' iI" .c..,,o. . ...... ;; ...... ;'""~ " SOiL PILE Umlt of remaining depression J SOft. AERXTION Pit.l~ I p METAL BUILOING LEO BLACK PARCEL' LEGEND ~) ~ I LOCATION OF SOIL BORING DRILLED BY KRAZAN & ASSOCIATES, 7/91 ~ TW-I LOCATION OF TEMPORARY MONITORING WELL INSTALLED BY KRAZAN & ASSOCIATES. 7/91 ..~.1 LOCATION OF SOIL BORINGS DRILLED BY WZI, 7/87 [--'4 W Z ! ! N C. ~JI BAKERSFIELD, CALIFORNIA ~ FORMER LOCATION OF 500 GALLON GASOUNE LEO BLACK ELECTRIC UNDERGROUND STORAGE TANK ~o MERCE ROAD, BAKERSRE'n, Ca. Site Activity Map Depicting Excavation and Soil Boring Locations Leo Black and Reed Parcels .o ,~' rio. DATE 2/95 , 0206.0010 IEXH,B,T 4 I I . GALLON GALLON GASOLINE DIESEL TANK TANK APPROXIMATE FORMER LOCATION OF US'PS REMOVED 9/91 X X X X X X X X X X PROPERTY -- BOUNDARY LIMIT OF 1993 EXCA VA TION.~ AERATION PILE BL LEO BL FENC MW-1 PROPOSED GROUNDWATER MONITORING WELL LOCATION t~ SB-f PRPOSED SOIL BORING LOCATION " ~ARCEL PROPERTY SB-2 i . [ -' 4 ELECTRICAL AERATION PILE z0 ~" U. C tRCEL ~ ~1~ ~': LEO B~CK ELECTRIC ~ ~ ROAD, B~RE~, O~ Map Depi~ng L~tions of Proposed Soil Bodngs and Groundwater MonEodn~ Wells GAU.ON I GALLON ' · GASOLINE · ~. DIESEl. , APPROXIMATE FORMER ~oc^~o. o~ us~ /' .. ~EMOVED ~ ~' . -' ~ ~m~., * x x x x x x ' ,"~A ................................................................. ;~'..' ...... A' :: / ~ : ~ . PROPERTY PROPERn' ~ ~ r ~;~ ~ ~ : '80UNDARY EXCAVATION~ . ~,, SB-2 · , m ' AE~ON PI~ z ' 4 I ~ LEO B~CK PARCEL w z, ,.c. B~ERSFIELD. OALIFORNIA k ~ LEO B~CK ELEC;IC - · Map Depl~lng L~tlons of Pro.seal MW.1 PROPOSED GROUNDWA~R MON~ORING J WELL LOCATION ~il and Gmun~ater ~oHngs ~ SB.1 PR~SED SOIL BORING LOCAT~N Mon~ofln; Wells ( _[ ~,.,,,, , ~ ~95 0206.0010 ~HIBI/ 5 LOCKING WELL CAP IN ALUMINUM UTILITY BOX CONCRETE PAD GROUND SURFACE 8" DIAMETER BOREHOLE 2" DIAMETER, FLUSH JOINT. SCHEDULE 40 PVC CASING (Surface to Approximately 403 CEMENT AND BENTONITE GROUT (Surface to Approximately 37) 2' OF BENTONITE PELLETS ABOVE SAND (Approximately 37' to 393 GROUNDWATER ESTIMATED · AT APPROXIMATELY 45' = SAND PACK, #212 SAND OR EQUIVALENT (Approximately 39' to 65') 2" DIAMETER SCHEDULE 40 PVC SCREEN 0.01.0" SLOTS (Approximately 40' to 653 BOTTOM CAP WZI INC, BAKERSFIELD, CALIFORNIA LEO BLACK ELECTRIC 3090 PIERCE ROAD, BAKERSFIELD, CA. GROUNDWATER MONITORING WELL CONSTRUCTION DIAGRAM TABLE 1 LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY EXCAVATION SAMPLES COLLECTED 7/26/93 THROUGH 8/6/93 Sample Numbe~. I.B-I I.B-2 LB-3 LB-4 LB-5 LB-6 LB-7 ~ LB-9 LB-10 LB-11 I.B-12 LB-13 LB-14 LB-15 LB-16 I.B-17 Sample Type: Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Sample Location: 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 Units TPH Gas mg/k;I ND ND ND ND ND 14.00 430.00 ND ND ND ND ND ND ND ND ND ND TPH Diesel rog/kg ND ND ND ND ND 100.00 680.00 .......... Benzene m~/k~! ND ND ND ND ND ND ND .......... Toluene m~/k~i ND ND ND ND ND ND ND .......... Ethylbenzene m~/kg ND ND ND ND ND ND ND .......... Xylenes rog/kg ND ND ND ND ND ND ND .......... Lead m~liter ............... Sample Number: I.B-18 LB-19 LB-20 LB-21 LB-22 LB-23 I.B-24 LB-25 LB-26 LB-27 I.B-28 LB-29 LB-30 LB-31 ::::::::::::::::::::::::::::::: Sample Location: 2 2 2 2 2 3 3 3 3 3 3 3 3 3 ii::~::iii::i:::iiii?i:~: 4 Deplh: 25 ft. 25 fL 15 ft. 15 ft. 15 ft. 1 ft. I ft. I ft. 1 ff. I fL 1 fL I fL 1 fL 1 ft. i::!!i::i??:!::i?:ii??:!i! 45 fL Units .......................... 1) Sample collected from soil stockpiled during 1/91 excavation 2) Sample collected from excavation 3) Sample collected from aeration piles 4) Groundwater sample TABLE 2 LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY EXCAVATION SAMPLES COLLECTED 2/10/87 THROUGH 1/17/91 Sample Number LB-1 LB-2 LB-1 I_B-1 LB-2 1.8-2 LB-2 LB-2 LB-,'3 LB-3 LB-3 LB-5 LB-6 LB-6 Grab Sample Type: Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Sample Date: 2/10/87 2/10/87 7/1/87 7/1/87 7/1/87 7/1/87 7/1/87 7/1/87 7/1/87 711187 7/1/87 7/1/87 711/87 7/1/87 1117/91 Sample Location: I 1 2 2 2 2 2 2 2 2 2 2 2 2 3 Depth: 5ft. 2ft. 10-11.5' 13-14.5' 5ft. 10-11' 15-16.5' 15-16.5' 10-10.5' 10.5-11" 15-15.5' 15-15.5' 10.5-11' 13.9-14. 28ft. Units TPH Gas m~/k~l ................ 1.20 TPH Diesel rog/kg .................. Benzene m~/k~l 31.55 5.24 9.01 1.90 -- ND ND ND - ND 38.49 ND ND ND ND Toluene m~/k~l 909.30 50.36 19.21 25.91 - ND ND ND - ND 48.62 ND ND ND ND Ethylbenzene rog/kg 323.59 23.94 11.84 47.00 -- ND ND ND - ND 129.80 ND ND ND ND Xylenas m~l/k~l 5972.73 484.95 405.85 642.28 - ND ND ND - ND 1328.30 ND ND ND ND Isopropyl Benzene m~/k~l 29.73 10.91 ND 67.32 -- ND ND ND - ND ND ND ND ND - Total Vol. Hydrocarbons m~k~l 10074.5 2034.8 2293.83 3690.88 - ND ND ND - ND 5263.20 ND ND ND - Oil & Grease m~Jk~l 133 130 - 144. 318. 858. I') 20 - 148. - .... 32. 1) Sample collected directly beneath tank 2) Sample collected from soil boring by WZI 3) Sample collected from excavation by WZI APPENDIX I WZI 1987 SUMMARY REPORT WILSON ZUBLIN INC. 'r c. ol. OO¥ LEO BLACK ELECTRIC SITE CHARACTERIZATION This site characterization summarizes all sampling done to date at Leo Black Electric located at 3909 Pierce Road, Bakersfield, California, Section 23,T.29S, R.27E, M. D. B. & M. (Exhibit No. 1). The sampling was required by the Kern County Health Department (Amy Green letter dated March 6, 1987). Site History. Leo Black Electric was in the business of sales and repairs on electric motors. The property is located in an industrial area of Bakersfield. The underground tank, which is the subject of this site characterization, had a capacity of 500 gallons and was installed in' approximately 1956. The tank has been used intermittently for the storage of gasoline. It was not used in the last two years prior to removal; although, actual use has not been documented. No spills or leaks have been reported. McNabb Construction removed the tank on February 10, 1987. A copy of application for permit for abandonment of the underground tank is included as Exhibit No. 2. B. C. Laboratories collected and analyzed soil samples from depths of 2 and 5 feet below the tank. The analyses are included in Appendix No. 1. The site characterization work plan required by the Kern County Health Department, as stated above, was approved on June 23, 1987. The sampling at the site was completed on 'July 1., 1987. All the lab results were reported to Wilson Zublin Inc. by July 27, 1987. Contamination Mapping The extent of contamination has been summarized in a series of maps listed below: A. Total Volatile Hydrocarbons Exhibit No. 3 - Distribution at 10 feet below surface Exhibit No. 4 - Distribution at 15 feet below surface with cross sections A-A' and B-B' (east~west, north-south, respectively) 4800 EASTON DRIVE #114 · BAKERSFIELD, CALIFORNIA 93309 POST OFFICE BOX 9217 * BAKERSFIELD, CALIFORNIA 93389 · 805/326.1112 Page 2 B. Isopach of Total Volatile Hydrocarbon Contamination (Exhibit No. 5) C. Oil and Grease Exhibit No. 6 - Distribution at 10 feet below surface Exhibit No. 7 - Distribution at 15 feet below surface with cross section C-C' and D-D' (east-west, north-south, respectively) The data indicates that BTX contamination (Exhibit No. 3 and 4) from reached The toe of the contamination the tank has groundwater. plume (identified on cross section A-A', EXhibit No. 4) which has formed may be suggesting a southwesterly down-gradient direction. However, the borehole spacing w. as not designed to confirm our interpretation of a westerly regional gradient. The isopach of total volatile hydrocarbon contamination is presented in Exhibit No. 5. The oil and grease distribution (Exhibits No. 6 and 7) is offset to the east from the BTX plume. This situation suggests that there was a separate source of oil and grease contamination. The oil and grease concentration is at its highest at around 10 feet below the surface and decreases to less that 20 rog/kg at the water table at 15 feet. Discussion of Sampling, Lab Analysis The location of the boreholes drilled and sampled are identified in Exhibit Nos. 3 through 7. All the locations were measured from the 6 1/2" metal pipe near the northeast property corner; Borehole LB 2 was measured 5' south and 43t west of the corner. The locations on the Exhibits, therefore, are precise. Note that the location and number of wells deviates from the original proposed work plan. The changes were discussed with Amy Green by telephone and with the attorney handling the estate on July 1, 1987 prior to drilling the modified and additional locations. Drilling and sampling was accomplished in accordance with the methodology outlined in the proposed work plan submitted to the Kern County Health Department on May 27, 1987. The data collected from each borehole is summarized in Appendix No. 2 (a total of five holes). The location at LB 4 was not drilled because contamination was documented in the surrounding holes and because the sampling that was done when the tank was removed was sufficient. WILSON ZUBLIN INC. Page 3 Table No. 1 summarizes the cores taken and preserved; those sent into B. C. Laboratories for analysi~ are also identified. The lab results of all the analyses along with copies of the Chain of Custody documents are included as Appendix No. 1. Hydrology The lithology in all the boreholes was massive sand to total depth. Groundwater was probably reached at 15 feet as noted on the lithologic logs in Appendix No. 1, but not penetrated enough to recover sufficient water sample for analysis. The 15' water table is compatible with the regional setting. But as emphasized in the proposed work plan, the distribution of data is inadequate to precisely determine the gradient or the possibility of the water reached in these boreholes being perched water above the primary unconfined aquifer. Report Prepared By: Susan Chandler Kiser California Registered Geologist #3831 Expiration June 30, 1988 WILSON ZUBLIN lNG. iSYCAI' .... ~ WILLOW ORIVE ~.'"" LEO BLACK ELECTRIC ~' .. 3909 Pierce Road {. ~'-~ .... Bakersfield .. ?: { '" " Gt STREET _ ~- (..)l-tiN WAY .- i u~ Z ~" ~ ~ ANTONIO WAY .° ! 1 -. ~ ~SST ' -- X THOMAS AVE ROSEDALE HWY. ,. '- COMMERCIAL ST ~, . I-. *': "-, , o --t RNIA [~] WILSON ZUBLIN INC. Baker.~field. California LEO BLACK ELECTRIC SITE CHARACTERIZATION SCALE IN MILES .. LOCATION MAP 0 0.4 0.8 · · Geol.: Kiser, Greenwood~ 7187 , DN: 143 Engr.:Wilson I EXHIBIT NO. 1 Kern County tlealth De~'tment '- Permit N_ 1700 Flower S~ree~, 8nke~sfl,eld, CA 93305 ~. of Tanks to .... ~ off Application (Ffl~ Out One Application Per ~acilit~ ' O~nry Clo~ure/A~ndo~e~ ~ · ~emanen~ Closure/~naon.er Facility Name ~ ~~ Facility ~dress ~qO~ ~ D~~ Nearest Cross St. T R S'~ 'Ror~l ~caffo~ ~ly) -- . O~rator ' ' ' ~~. Telephone ~dress ' -- · / Zip B. Water ~o Facility P~ovid~ by ~~ ~'~, ~P~ Gro~ldwater ~rk?'s C~m~a~ion certification ;~ O~ ~e Insurer Enviror~estal ~es~e~ Con.actor ~ · ~. ~~ ~ License No. ~_,. Proms~ star~i~ ~t~/~j [SQ . proms~ ~pl'etion ~rker's C~nsation cert'ifidation )" '~_- Insurer ~ ' ' D. Ch~ical C~sition of Materials Tank { Chemical Stored (non-co~ercial name) Dates stored Chemical previously Stor~ . 4if d ~erent) tO . , ~O ~ratory/T~t ~11 Perfo~ ~yses of S~ples ~te'r'~b~ " F. This application for: ~emoval or .~a~ando~en% in place · * PL~ ~OVIDE INFO~TION REQUEST~ ~ ~E DIDE OF ~I~ SHEDE B~ORE SU~'~PZ~3 APD~ICATZ~ ~R ~. This forth has been completed under. D~nalty of perjury and to ~he best of my knowl~ge is a,¥J co rrec~ EXHIBIT N~ P~o'{i¢l~ DescL'[pti,on 'cal Layout of Facility Us $ :e Provided Below; ln~Tu¢]e All' the folLowi~]'-,.~fo~tion~ ~' ~~cation of Tank(s), Piping & Ois~nse~(s) ?. pro~s~ S~pling Locatio~ Indicati~ Approximate ~p~ //of Samples ~ ~eacest Street or Intersection ~y Water ~lls or Gu~face Waters.Within 100' R~i~ of Facility .. Approved By Scale ~ ,, FORMER LOC/~TION OF UNDERGROUND' TANK " ,. v v FENCE PRdPERTY ' A LINE A ~ ~ ASPHALT A (Non'e Detected) (None Detected) (None Detected) A' LB 6 LB 3 LB 2 2293 ~ LB 5 ASPHALT BUILDING ~ WILSON ZUBLIN INC. Ilakersfiehl~ C. alil',rnia LEO BLACK ELECTRIC SITE CHARACTERIZATION -N- TOTAL VOLATILE HYDROCARBON~ SCALE IN FEET TEN FEET BELOW GROUND *9 FE ET BELOW (u g / g ) GROUND 0 5 10 Geol.:r:,,,~,. ~^,;~,.~,,Kiser' GreonwoodI 7~87 ! ,DN: 144 VIEW ~. < _ ~ i FORMER LOCATICN OF ~ ,., . / / / ~ .,1ND TANX < z , ,-- 8o / / ×.~, ;3 ~ (None Deteaed) iA' I LB 6 LB 3 LB 2 ~ld ~-,~ .,-.~'~ /" ~ / / ~,~~ ' ~ %~ ~ · ~ 0008 6000 ' . \\ .... :':-~ TOTAL ~'.V, OLATI.LE HYDROCARBONS (ug/g) ~ LB1 ,~, LB 5 ~ :~,,~e ,-' ~. '",-..~..~~,~ * 13 FEET BELOW O 5 10 ' ~ ~ t GROUND m o A I LB 6 LB 3 LB 2 ~NOSURFACE I A' [' FOR~ER LOCATmN OFI 5- HYDROCARBONS (uglg) [ __ I - o SCALE IN FEET [ 10 - (None Detected) (None Oetecte~) Non, Detected) ~ WILSON ZUBLIN INC. II II J~. ~o'~ ~-~. i LEO BLACK ELECTRIC 'J ,s- ~ '"°ne D-etect~)~~'''~'~'x/'/ · VOLATILE HYDROCARBON ................ '....'_--.'--..'..'...'.. ~,N.o,.~.D..e£e..a.e..d) ..... GROUNDWATER ~ CONTAMINATION PLUME: ................. ¢3 MAPS and CROSS SECTIONS Geol.: Kiser, Greenwood~ 7187 ~ DN: 145 Engr.:Wilson ~ EXHIBIT NO. 4 FORE{ER LOCATION OF "'. ~ UNDERGROUND TANK PROPERTY LIN ,'~ /' " X , ASPHALT A' LB6 3 LB 2 8 LB LB 5 6 ASPHALT ~ WILSON ZUBLIN INC. BUILDING l{akersfieldI Californiq LEO BLACK ELECTRIC SITE CHARACTERIZATION VOLATILE HYDROCARBON SCALE IN FEET CONTAMINATION ISOPACH 0 5 10 Geol.: Kiser, GreenwoodI , 7187 ! DN: 147- Fnnr ' W;l~n .............. FORMER LOCATION OF ",. UNDERGROUND TANK v FENC[ PROPERTY LINE '1 ASPHALT I I LB 6 LB 3 I .... , LB 2 " L44 · ~ ~1 1 LB 5 ASPHALT ~ WILSON ZUBLIN INC. BUILDING lln,ker.~ri~'Id1 C:,li,rornia LEO BLACK ELECTRIC SITE CHARACTERIZATION OIL AND GREASE FIFTEEN FEET SCALE IN FEET BELOW GROUND * 13 FEET BELOW 0 5 10 Geol.: Kiser. GroenwoodI 7/87 ! DN: 146 ~FIOtJND F_- nrlr.: Wil~nn ~ ~- PLAN' WEW FO.YE. LOC^nON. r~<OF. / FENCE X ~ X ~= ' / I 8~ / / Id I I ~ ~ ' LB 6 / LB 3 I ~-~ , , IL AND GREASE (mg/kg) N ~ TEN FEET BELOW GROUND , LB I 200~ 5 I I I I · t ~ FEET ~ELOW 0 J 10 ~ o a I C . LB 6 LB 3 ' LB 2 ~ND SU~ACE I C' ' ~ ~- ' ' 0'~ OIL AND GREA~E (rog/kg) IlL II ~,,,[ ~~~~ SITE CHARACTERI~TIONoiL AND GREASE ,,. ~ ~ ..... ~g~....~. .... MAPS and CROSS SECTIONS ..................................................................... ~ ..................... Geol.: Kiser, Greenw~d~ 7~87 I ON: 148 Engr.:Wilson I EXHIBIT No.7 I'~ APPENDIX 1 LABORATORI IN(::. J. J.' EGtlN. lEG. CHEM. ENGI. /YTR0ILqJ¥ MAIN OFFICE: 4100 PIERCE ROAD. BAKERSFIELD. CA. 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) MC NABB CONST. ATTN: BRIAN MC NABB Date of ~616 STARK STREET REPORT:2-19-8? BAKERSFIELD, CA. 93305 LAB No.:2437 lample Description: LEO BLACK ELECTRIC :~' UNDER TANK DATE DATE SAMPLE DATE ANALYSIS SAMPLE COLLECTED: RECEIVED @ LAB: COMPLETED: 2-10-87 2-11-87 2-17-87 Minimum Reporting Analyses Reporting Constituent Units Results Level Benzene ~g/g 31.55 0.10 Toluene ~g/g 909.30 0.10 Ethyl Benzene ~g/g 323.59 0.10 p-Xylene ~g/g 1983.96 0.10 m-Xylene ~g/g 1983.96 0.10 o-Xylene ~g/g 2004.81 0.10 Isopropyl Benzene ~g/g 29.73 0.10 Volatile Hydrocarbons Hg/g 2807.57 0.50 Total Volatile Hydrocarbons pg/g 10074.47 0.10 EPA 5020/8020: DRY MATTER BASIS '.;~ COMMENTS: Oil [ Grease: 133 mg/kg VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a Benzene Factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this ~eport. Total volatile hydrocarbon values may be less than, equal to, or greater than any other constituent, or the combined total. TOTAL VOLATILE HYDROCARBONS: The sum total of all non-chlorinated constituents on this report. A6111CUL ~ ,.,.,.,,.,= RATORI J. I. I~G&IN, lEG. CHEM. EN~. ~T~L~M ~AIN OFFIG~ 4100 PIERGE ROAD, BAKER$FIELD. GA. 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) MC NABB CONST. ATTN: BRIAN MC NABB Date of !616 STARK STREET REPORT:e-I~-8? LdAKERSFIELD~ CA. ~3305 ~ LAB No.:eA36 . t.i,?;ample Descripti~ ~L~ ~' UNDER TANK ~--.-..,~ ............ ~ ~ATE DATE SAMPLE DATE ANALYSIS ~AMPLE COLLECTED: RECEIVED B LAB: COMPLETED: E-10-87 e-il-8? 2-17-87 Minimum Reporting Analyses Reporting Constituent Units Results Level Benzene Hg/g 5.EA 0.10 Toluene Hg/g 50.36 0.10 Ethyl Benzene ~g/g ~3.~4 0.10 p-Xylene ~g/g 1A8.E8 0.10 m-Xylene .Hg/g 1A8.E8 0.10 o-Xylene ~g/g 188.39 0.10 Isopropyl Benzene ~g/g 10.91 0.10 Volatile Hydrocarbons Hg/g 1A5~.3~ 0.50 Total Volatile Hydrocarbons Hg/g ~034.?~ 0.10 EPA 50~0/80e0: DRY MATTER BASIS 'L''ii~ COMMENTS: Oil ~Grease: 130mg/kg VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to CeO) utilizing a Benzene Factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. Total volatile hydrocarbon values may be less than, equal to, or greater than any other constituents or the combined total. TOTAL VOLATILE HYDROCARBONS: The sum total of all non-chlorinated constituents on this report. Analyst DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC LOGGED BY:Rector. Kiser. Greenwood TEST BORING LB 1 HOLE DIAMETER: 6J./2' O.D. WZI (ft) elegy ~ ~ N. WPE=~O ~ REMARKS ASPHALT and ASPHALT RESIDUE _~ 8:30 SAND, tan, fine to ve~ fine grained with ccassional medium to coarse grains, - :.~,~.~:~{~=':~. an~ular to subangular, micaceous, _ ~ massive, slightly moist, no gasoline odor ~;~ ~ A 1-3/8' spl~ s~n sampler -- 5 ~ ~:~1 ~ Split 3 was used after a 2-3/8" - ~ ~! S~on 2 sampler (equipt~ w~h brass ~J~= ~' ~:~ 1-3~" 6 sleeves) failed to recover any Slight gasoline odor began at 7' - ~ :~:*:~E*~l sample material. SAND, as above, except increasing ~ ~;;~.~;.~ grain size with depth. - ~ -~;.-~73 ~ ~ ~' ~' ~'~' ,~'~ ~ Spl~ Did not a, empt to use a 2-3/8' Increasing gasoline odor w~h depth ~ 10 '~ '~ ., ~ ~. =~. ~ 2 sampler ~ ~;..~;.~ S~on 13 9:15 ~ TOTAL VO~TILE _ ~ ;~.~ 1-~8" HYDROCARBONS: 2293 ug/g SAND, tan, medium to ~arse grain~ ~'~?~;~ OIL and GREASE:I~ mg~g -- ~ '~'~ ~ ~bm~d~d. m~. ~i~, - ~'~:'~ ~ ~ ~ TOTAL VO~TIL~' slightly moist, strong gasoline odor. -- 1 5 ~ 2-3/8' 6 HYDROCARBONS: 3691 ug/g No Free Groundwater _ 10:10 Encountered _ --20 - - ~ Sand. fine grained, massive ~ ~ng,omarat. I Aspha,t ~ Sand, medium gr;ined, mass~e ~ Siltstone ~ Asphalt Residue ~ Sand. ~orly..ad ~ Limestone ~ Hydrocarbon Odor DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB 2 HOLE DIAMETER: 6-1/2" O.D. WZI [ SAMPLES DESCRIPTION Depth Lith- ~ NO. TYPE °~ c~ ~ REMARKS (It) ology 3: ASPHALT and ASPHALT RESIDUE 6:30 - SAND, tan, fine to very fine grained :~,~:~,~.,'.~ ~ with ocassional medium grains, - ~i~...~,~ ~,~ ~.=..~ angular to subangular, micaceous, - i~'~!~l==~ ~i massive, slightly moist, no hydrocarbon :==~==~ ~".~=~.~,=.~=::==~ .,. ~':: cdor ~ 5 ~';':~=~[~' ~ k-~ Split :~=:.,.=.<~:.,~=.~,.,~ .~= OIL and GREASE: !~'"":~'~"~'"';! !~!L~I Spoon 13 ' ::~:~i ~'..': 318 mg/kg ~-:~ ~ 2-3/8' Slight hydrocarbon odor began at 7' - ,,~ ?..~.:..;,..~ ~ ~::'.~:,~". :,,::,. SAND, as above, except increasing grain - ......... size with depth, slight hydrocarbon odor. - ~ ~-_,.~.~':""""-~' ,_-~: ;....; Increasing hydrocarbon odor with depth -- 10 ~ ;-."~.~? Split 3 ~, ."¢.-7.~.' 2 Spoon 3 7:20 HYDROCARBONS: SAND, tan. fine to coarse grained, - ~, ;'-~::'~:- (None Detected) very poorly sorted, subangular to _ ,~; ~.. ¢.. 2-3/8' OIL and GREASE: subrounded, micaceous, massive, ~ ~.'.'.'_';..'.'.'.'i ~, ~.~.: 858 mg/kg slightly moist, strong hydrocarbon odor. ~ ~. ~., SAND, as above, except with less fines, ~, I;~';;: Split TOTAL VOLATILE becoming mo[stet. ~ lS ~;'~'~=:; ~ HYDROCARBONS: ~ ~:~"":7~J 3 Spoon 14 (None Detected) Groundwater Encountered - ~ 1-3/8' at 15' 2' (measured with a - Total 8:30 OIL and GREASE: steel tape covered with a - Depth Less Than 20 rog/kg water- indicating chemical) ~ 20 Hole was plugged with seven - 60 pound sacks of cement ~ Sand, coarse grained, massive ~ Clay or Claystone ~ Concrete ~ Sand, poorly sorted ~ Limestone ~ Hydrocarbon Odor DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC LOGGED BY:Rector, Klser,Greenwood TEST BORING LB 3 HOLE DIAMETER: 6-[/2' O.D. WZl '~: SAMPLES Depth l .ith- DESCRIPTION (ft) l ~ ::r. REMARKS ASPHALT and ASPHALT RESIDUE ....... 10:20 SAND, tan, ve~ fine to fine grained w~h . ocassional medium to coarse grains, - ~ :~ massive, slightly moist. ~o gasoline odor with some ~arser grains, subangular to =~. ~. ~. 2 S~on 13 subrounded, micaceous, massive, - ~ .,~,~, (None Dete~ed) slightly moist, no gasoline odor. - ;-{;~-~;C~ ~OIL and GR~SE: 148 mg~g Slight gasoline odor began at 14' - ~':'"~ Did not affempt to use a 2-3~' sampler ,uban~ular to ~ubround~d, mieae~ou,, - lotal S~on massive, ve~ moist, gasoline odor. Depth 1-3/8' :appeared on the sampling t~t - TOTAL VO~TILE No Free Groundwater - HYDROCARBONS: 52~ ug/g Encountered _ ~20 ~ Sand, medium grained, massive ~ Siltstone ~ Asphalt Residue ~ Sand, ~arse grained, massive ~ Clay or Cl~stone ~ ~ncrete ~ Sand, ~orly so~ed ~ Limestone ~ Hydmca~on Odor DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB-5 HOLE DIAMETER: 6-!/2" O.D. WZl DESCRIPTION Depth Lith- (ft) ology J~ NO. TYPE~ ~o 8 ~ ~ REMARKS ASPHALT and ASPHALT RESIDUE 12:30 - SAND. tan. very fine to medium grained, angular to subangular, very micaceous, massive, slightly moist, no gasoline odor _ -- 5 k-"J Split 2 SAND. tan. medium to coarse grained _[/~1 Spoon 3 with rare small pebbles, subangular'to 1-3/8' 6 subrounded, micaceous, massi~/e, - slightly moist, no gasoline odor. - .~!~ SAND, as above, except increasing - 12:50 I~!':~'~' grain size with depth. -- 10 ~ Split 2 ~""~ _ 2 Spoon 2 _V~J 2-3/8' 6 1:10 ~ SAND, tan, medium to coarse grained, subangular to subrounded, micaceous, - - massive, very moist, no gasoline odor. - Split Did not attempt to use a No gasoline odors -- 15 C~ 3 Spoon 10 11:40 2-3/8' sampler No Free Groundwater - Total ' 1-3/8' TOTAL VOLATILE Encountered _ Depth HYDROCARBONS: (None Detected) ~20 ~ Sand, medium grained, massive '~ Siltstone B Asphalt Residue ~ Sand. coarse grained, massive ~ Clay or Claystone ~ Concrete ~ Sand. poorly sorted ~ Umestone ~ Hydrocarbon Odor DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC I~.1 LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB-6 HOLE DIAMETER: 6-~./2' O.D. WZl ology :{ No. 8 REUAR S ASPHALT and ASPHALT RESIDUE t :40 - SAND, tan, very fine to medium grained, - angutar to subangular, very micaceous, massive, slightly moist, no gasoline odor -- 5 ~ Split SAND, tan, fine to medium grained, _[/~1 Spoon 11 subangular to subrounded, micaceous, 2-3/8" massive, slightly moist,.no gasoline odor. - SAND. tan, fine to coarse grained - ~. 2:00 with rare small pebbles, subangular to ~ 10~. I~! Split TOTAL VOLATILE subrounded, micaceous, massive, _[/~2 Spoon 17 HYDROCARBONS: slightly moist, no gasoline odor. _ 2-3/8' (None Detected) SAND, tan, medium to coarse grained, subangular to subrounded, micaceous, - Split TOTAL VOLATILE massive, very moist, no gasoline odor. ~ 15 vX~J3 Spoon 21 2:25 HYDROCARBONS: - Total 2-3/8" (None Detected) No gasoline odors _ Depth No Free Groundwater - Encountered _ ~20 - ~ Sand, fine grained, massive ~ Conglomerate I Asphalt ~ Sand. medium grained, massive ~ Siltstone ~ ' Asphalt Residue ~ Sand, coarse grained, massive ~ Clay or Claystone ~ Concrete ~ Sand, poorly sorted J~ Umestone ~ Hydrocarbon Odor AGAI£UL TUA[ ,.,.,.,,.,,,,, LABORATORIES, InD. ~TRO~[U¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA 93389 Attention:E. GREENWOOD Lab No.: 12752 Sample Desc.: LB ~1 10-11.5' SOIL DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g 9 01 0.10 Toluene ug/g 19 21 0.10 Ethyl Benzene ug/g 11 84 0.10 p-Xylene '' ug/g 76 82 0.10 m-Xylene ug/g 181 92 0.10 o-Xylene ug/g 147 11 0.10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g 1847.92. 5.00 Total Vol. Hydrocarbons ug/g 2293.83 0.10 TEST METHOD: California State D.O.H.S. SW 5020: Dry Matter Basis Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated,] constituents on this report. LABORATORIES, Inc. J. J. ~LIN, REG. CHEM. ENGR. ~TROL[U~ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSONZUBLIN INC. Date of P.O. BOX 9217. Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 12753 Sample Desc.: LB ~1 13-14.5' B SOIL DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g 1 90 0.10 Toluene ug/g 25 91 0.10 Ethyl Benzene ug/g 47 00 0.10 p-Xylene ug/g 115 13 0.10 m-Xylene ug/g 260 53 0.10 o-Xylene ug/g 266 62 0.10 Isopropyl Benzene ug/g 67.32 0.10 Volatile Hydrocarbons ug/g 2906.47 5.00 Total Vol. Hydrocarbons ug/g 3690.88 0.10 TEST METHOD: California State D.O.H.S SW 5020: Dry Matter Basis Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report. .~'in- - Analyst LABORATORIES. Inc. J. J. EGLIN, REG. CHEM. ENGII. pC~ TflOLLCUl, t 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD .i Lab No.: 12754 1 .... Sample Desc.: LB ~2 10-11' SOIL ~ DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0 10 Toluene ug/g None Detected 0 10 Ethyl Benzene ug/g None Detected 0 10 p-Xylene ug/g None Detected 0 10 m-Xylene ug/g None Detected 0 10 o-X¥1ene ug/g None Detected 0 10 Isoprop¥1 Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. None Detected 0.10 Hydrocarbons TEST METHOD: California State D.O.H.S. SW 5020: Dry Matter Basis Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS:' The sum total of all [non-chlorin- ated] constituents on this report. ~J~J~ ~1~ Analyst i LABORATORIES, InC. J. J. EGLIN, REG. CHEM. ENGR. PETROL£U¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389' Attention:E. GREENWOOD Lab No.: 12755 Sample Desc.: LB $2 15-16.5' SOIL DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0.10 Toluene ug/g None Detected 0.10 Ethyl Benzene ug/g None Detected 0.10 p-Xylene ug/g None Detected 0.10 m-Xylene ug/g None Detected 0.10 o-Xylene ug/g None Detected 0.10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. Hydrocarbons ug/g None Detected 0.10 TEST METHOD: California State D.O.H.S~ SW 5020: Dry Matter Basis Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ,ated] constituents on this report. ~'i ~. F~lin- Analyst AGflICUL TUR[ ,~,,,,,,,,,,,,, LABORATORIES. InC. J. J. EGLIN, REG. CHEM. ENGR. P[;WO~[(/¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 12756 Sample Desc.: LB ~2 15-16.5' WATER DATE SAMPLE DATE'SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0 10 Toluene ug/g None Detected 0 10 Ethyl Benzene ug/g None Detected 0 10 p-Xylene ug/g None Detected 0 10 m-Xylene ug/g None Detected 0 10 o-X¥1ene ug/g None Detected 0 10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. Hydrocarbons ug/g None Detected 0.10 TEST METHOD: California State D.O.H.S. SW 5020: Dry Matter Basis Comments: NO WATER IN SAMPLE. SOIL MATRIX OF SAMPLE WAS ANALYZED. VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report. (/J. ~/J. ~'lin' - An~alyst AG#ICUL TUllE ,,,,,,,,,,,,,,,, LABORATORIES. Ir-lC. J. J. EGLIN, REG. CHEM. ENGR. P[~O~/~ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 12757 ~ .... Sample Desc.: LB ~3 10.5-11' B SOIL .~ DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0 10 Toluene ug/g None Detected 0 10 Ethyl Benzene ug/g None Detected 0 10 p-Xylene ug/g None Detected 0 10 m-Xylene ug/g None Detected 0 10 o-Xylene ug/g None Detected 0 10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. None Detected 0.10 Hydrocarbons TEST METHOD: California State D.O.H.S.' SW 5020: Dry Matter Basis VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report. ~: .~. Eg~in Analyst · ORATORIES. I I'-IC. PEr~oL£u¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 127,58 Sample Desc.: LB ~3 15-15.5' SOIL DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: O1-Jul-87 O1-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g 38.49 0 10 Toluene ug/g 48.62 0 10 Ethyl Benzene ug/g 129.80 0 10 p-Xylene ug/g 330.30 0 10 m-Xylene ug/g 673.26 0 10 o-Xylene ug/g '324.74 0 10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g 3717.99. 5.00 Total Vol. Hydrocarbons ug/g 5263.20 0.10 TEST METHOD: California State D.O.H.S. SW 5020: Dry Matter Basis Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report2 Analyst LABORATORIES, Inc. ~r~O~U¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 12759 Sample Desc.: LB ~5 15-15.5' A.B.C. SOIL DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0 10 Toluene ug/g None Detected .:~,~:.0 10 Ethyl Benzene ug/g None Detected .-'" 0 10 p-Xylene ug/g None Detected 0 10 m-Xylene ug/g None Detected 0 10 o-Xylene ug/g None Detected 0 10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. None Detected 0.10 Hydrocarbons ug/g TEST METHOD: California State D.O.H.S. SW 5020: Dry Matter Basis Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report. By ~.~/~. ~lin Analyst LABORATORIES, Inc:. J. J. EGLIN, REG. CHEM. ENGR. 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 12760 Sample Desc.: LB ~6 10.5-11.0' B SOIL I~ DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: 01-Jul-87 01-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0 10 Toluene ug/g None Detected 0 10 Ethyl Benzene ug/g None Detected 0 10 p-Xylene ug/g None Detected 0 10 m-Xylene ug/g None Detected 0 10 o-Xylene ug/g None Detected 0 10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. la Hydrocarbons ug/g None Detected 0.10 TEST METHOD: California State D.O.H.S. SW 5020: Dry Matter Basis .. Comments: VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report. AGRICUL TUR[ LABORATORIES, Inc. ~¥T~OL~U¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Purgeable Aromatics (SOIL) WILSON ZUBLIN INC. Date of P.O. BOX 9217 Report: 13-Jul-87 BAKERSFIELD, CA. 93389 Attention:E. GREENWOOD Lab No.: 12761 Sample Desc.: LB $6 13.9-14.3' B SOIL DATE SAMPLE DATE SAMPLE DATE ANALYSIS COLLECTED: RECEIVED @ LAB: COMPLETED: O1-Jul-87 O1-Jul-87 09-Jul-87 Minimum Reporting Analysis Reporting Constituent Units Results Level Benzene ug/g None Detected 0 10 Toluene ug/g None Detected 0 10 Ethyl Benzene ug/g None Detected 0 10 p-Xylene ug/g None Detected 0 10 m-Xylene ug/g None Detected 0 10 o-Xylene ug/g None Detected 0 10 Isopropyl Benzene ug/g None Detected 0.10 Volatile Hydrocarbons ug/g None Detected 5.00 Total Vol. None Detected 0.10 Hydrocarbons ug/g TEST METHOD: California State D.O.H.S. SW 5020: Dry Mat%er Basis Comments: VOLATILE HYDROCARBONS: Quantification ofvolatile hydrocarbons present (C1 to C20) utilizing a benzene factor. These volatile hydrocarbons are in addition to the constituents specifically defined on this report. TOTAL VOLATILE HYDROCARBONS: The sum total of all [non-chlorin- ated] constituents on this report. By ~ J~. j.~gl-{n - Analyst LABORATORIES, I F'IC. J. J. EGLIN, REG. CHEM. ENGII. 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Wilson Zublin, Inc. Date Reported: 7/21/87' P. O. Box 9217 Date Received: 7/1/87 Bakersfield, CA 93389 Laboratory No.: 12754 - 12755 (addition) Sample Description: Oil ~ Grease, mg/kg LB#2 10-11', Soil, sampled by ~.. Greenwood/M. Rector 858. LB#2 15-16.5', Soil, sampled by' ~.. Greenwood/M. Rector (-) 20. LABORATORIES, INC. · f LABORATORIES, Inc. J. J. EGLIN, REG. CHEM. ENGR. 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Wilson Zublin, Inc. Date Reported: 07/28/87 P. O. Box 9217 Date Received: 07/24/87 Bakersfield, CA 93389 Laboratory No.: 14674 - 14676 Attention: Eric Greenwood Sample Descriptions: Oil & Grease~ m~/kg LB1 @ 13-14,5' 07/01/87 .144. LB2 @ 5' 07/01/87 318, '~ LB3 @ 10-10.5' 148, ? B C LABORATORIES, INC. LABORATORIES, Ir-Ii"':. PE~OIEU~ 41~ PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Ct~IN OF CUSTODY RECO~ Report tO: Company ,_.~.~-,r.,. Attn: .Invoice to: Company S~ple Type: (check one) Drinking Water Surface Water Wastewater Oil ~Soil Sludge Other (speclfy) Company * s Address Collected: V[' /e ~ ~ Time collected: Date Sample(a) Relinquished to lab by: ~,~q ~e~& ? ~:~ Time Date Time 1. Sample Relinquished by: Name Date Tlme 2. Sample Received by: Name Date Time 3. Sample Rellnqulshed by: Name Date Tlme 4. SampLe Received by: N~e Date Tlme 5. S~ple Rellnqulshed by: Name D a t e Tlme 6. Sample Received by: Name D a J. J. BI. IN, REG. CHEM. ENGII. 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Crt&IN O~ CUSTODY RSCOtU) Invoice ~0: Company ~dress Saaple Type: (check one) Drinhin~ ~aCer Surface ~aCer ~as~ewaCer Oil '~ Soil Sludge Collector's Name ~ ~een~4~ Company' Name ~,{ ~ Company' s Address ~ % Date Collected: ~/J/~ Time collected: ~ fOO ~ ~ ZfV~ ~.~ ' ~ ~ __ ~ . a~ Date Time Sample(s) Received in lab by, .~~~ Date Time 1. Sample Relinquished by: Name Date Time 2. Sample Received by: Name Date Time 3. Sample Relinquished N~e Date Time 4. Sample Received by: · ' N~e Date Time 5. S~ple Relinquished by: Name Date Time 6. Sample Received by: Name Date Time A' A East "' West . /i=ENCE PIERCERoAD APPROXIMATE TANK LOCATION . . . . . . . .. .... i GROUND 10' -- WATER LEVEL '.' :'"%. 40'-- WATER LEVEL B' ,... ~p SAMPLE LocATION PR~EC~D Nodh PROPER~ LINE ; ..... ;....: ...... '-~ ........ READ PARCEL ~1' LEO B~CK PROPER~ . APPROXIMATE WATERLE '.:~ ' ~ 0 ~. tO' 20' -- -". ' SC~E IN FEET ?,. 30'-- 'GROUND ~~ ; ' 40'-- WATER LEVEL ~3 LEOB~CKE~CTRIC : ' .11 LIMIT OF .EADPA"CEL ® e o ® " LEO B~CK PROPER~ ,.i 'A~ A AERATION PILE 40' -2¢ -~' . -4¢ .40' -~'--~ -~¢ (Cover¢) 1000 ~. yd. e ~ -. LIMIT OF REMAINING B' ~ DEPRESSION (M~. Depth = 10 feet) ~1 wz, ,.c. ,. ? ~ ~[~ sol BAKERSFIELD, CALIFO~IA .... ST~[E ~,,~ ~ SOIL SAMPLE LOCATION LEO B~CK E~CTRIC ' AI IA' CROSS SECTION LOCATIONS ~SOIL EXCAVA~ON S~E~ ' .. .......... ~.~. ' .......... .... AUGUSTj ~93 I~;; .'. ~o. ~ i~o~..,~l~,=T ..3 '~.. '~ LEO BLACK ELECTRIC ' . LEGEND ~o PIERCE ROAD, BAKERSFIELD, CA. ~ ..., co..os~ so,. s~ ~oc~,o,~ ~o. ~xc^v^~o~ ~,~:~;.~.,~,. °i/--- o ~o. 1o. , ...... :..-~.u'--"~:~:~.~:',:~l.,:l u-- ':. SCALE IN FEET DATE APPENDIX II WZI 1993 SUMMARY REPORT 4700 Stockdale Highway, Suite 120 470 East Herndon Avenue, Suite 203 Post Office Box 9217 Fresno, California 93720 Bakersfield, California 93389 209/261-9160 805/326-1112 805/326-0191 FAX 209/261-9171 FAX WZI ,.c. LEO BLACK ESTATE SUMMARY OF EXCAVATION AND REMEDIATION OF CONTAMINATED SOILS 3909 Pierce Road Bakersfield, California August, 1993 Prepared by: WZI Inc. 4700 Stockdale Highway, ' Suite 120 Bakersfield, California 93309 Susan Chandler Kiser Certified Registered Assessor State of California No. 01095 Expiration Date: 06/30/94 ~ ' James Aller~ Waggo~r /~ Certified Engineering Geologist ~/State of California No. 1818 Expiration Date: 03~30~95 02060010.011 TABLE OF CONTENTS .Pa.qe I. Introduction 1 I1. Summary and Conclusions 1 III. Recommendations 2 IV. Geology and Hydrology 3 V. Field Methodology 3 Excavation Program 3 Soil Sampling Program 4 Ground Water Sampling Program 5 VI. Laboratory Methodology 5 VII. Analytical Results 6 Stockpiled Soil Characterization - 1991 Excavation 6 Leo Black Property and Read Parcel 6 Stockpiled Contaminated Soil- 1993 Excavation 6 Ground Water Sampling 7 VIII. References 8 EXHIBITS Exhibit I Location Map Exhibit 2 Soil Excavation Site Plan - January 1991 Exhibit 3 Soil Excavation Site Plan - July 26 - August 6, 1993 Exhibit 4 Cross Sections, July 26 - August 6, 1993 Excavation Exhibit 5 Laboratory Analyses Summary Exhibit 6 Off-Site Nearby Sources of Ground Water Contamination APPENDICES Appendix I Soil Compaction Test Results Appendix II Chain of Custody Records Appendix III Results of Laboratory Analysis of Soil Samples Appendix IV Results of Laboratory Analysis of Ground Water 0206oo1 o.011 VVZl INC TABLE OF CONTENTS Pa.cie ' I. Introduction 1 Ii. Summary and Conclusions 1 III. Recommendations 2 IV. Geology and Hydrology 3 V. Field Methodology 3 Excavation Program 3 Soil Sampling Program 4 ~..~ Ground Water Sampling Program 5 VI. Laboratory Methodology 5 VII. Analytical Results 6 Stockpiled Soil Characterization - 1991 Excavation 6 Leo Black Property and Read Parcel 6 Stockpiled Contaminated Soil- 1993 Excavation 6 Ground Water Sampling 7 EXHIBITS Exhibit 1 Location Map Exhibit 2 Soil Excavation Site Plan - January 1991 Exhibit 3 Soil Excavation Site Plan - July 26 - August 6, 1993 Exhibit 4 Cross Sections, July 26 - August 6, 1993 Excavation Exhibit 5 Laboratory Analyses Summary Exhibit 6 Off-Site Nearby Sources of Ground Water Contamination APPENDICES Appendix I Soil Compaction Test Results Appendix il Chain of Custody Records Appendix III · Results of Laboratory Analysis of Soil samples Appendix IV Results of Laboratory Analysis of Ground Water 0206o010.011 VVZl INC I. INTRODUCTION WZI Inc. has completed excavations of hydrocarbon contaminated soil at the Leo Black Electric site located at 3909 Pierce Road, Bakersfield, California (Location Map, Exhibit 1). The excavation extended onto the adjacent property located to the north of the Leo Black Electric site known as the Read Parcel. A 500 gallon underground tank, which had contained gasoline, was removed from the northeast area of the Leo Black Electric site in February, 1987. Gasoline contamination was identified in the soils beneath the tank and a site characterization was conducted in July 1987 (WZI, 1987) to determine the extent of subsurface contamination. In July 1990, a Work Plan was submitted to the Kern' County Environmental Health Services Department which outlined a program for the excavation and remediation of the gasoline contaminated soils at the site. On-site health and safety procedures were also outlined in the 1990 Work Plan. Excavation of contaminated soils was conducted in January, 1991 on the Leo Black property. Additional excavation was conducted between July 26 and August 6, 1993 on both the Leo Black property and the Read Parcel located immediately to the north. The purpose of this report is to summarize the excavation and on-site remediation activities conducted to date. co.c us o.s As documented in the previous Site Characterization (WZI, 1987), soils contaminated with gasoline from a 500 gallon underground gasoline storage tank were present in the northeast area of the Leo Black Electric property. Contamination was suspected of extending onto the Read Parcel located immediately adjacent to the Leo Black site to the north. 02060010.011 Page I Analysis of 15 confirmation samples collected from around the base of the excavation and along the north side on the Read Parcel verified that all the gasoline contamination caused by the former underground fuel tank has been removed. Diesel contamination identified in two intermediate samples (LB-6 from 32 feet and LB-7 from 34 feet) was noted by BC Laboratories as not being characteristic of diesel and probably consisted of other hydrocarbon compounds that would volatilize in the diesel range. diesel and contamination were identified in the ground water sample Gasoline, xylene collected from a depth' of 45 feet. The diesel contamination was noted as not being characteristic of diesel by BC Laboratories, similar to the diesel contamination identified in sample LB-7. Neighboring sources of confirmed ground water contamination are probably the sources of the contamination. The excavation was completely backfilled on the Read Parcel and partially backfilled on the Leo Black property as approved by the County. Compaction of the backfill soils as tested by M&T Agra, Inc. and all compaction tests exceeded the required 85%. III. RECOMMENDATIONS The contaminated soils presently stockpiled on-site should be remediated according to the Site Remediation Workplan Revised Technical Approach prepared by WZI in July 1990. The remaining excavation on the Leo Black property should be backfilled .w. ith suitable soil and the case should be closed without requiring additional ground water monitoring at the site due to the regional nature of the ground water contamination in the area. 02060010.011 Page 2 IV. GEOLOGY AND HYDROLOGY During the excavations, fine to coarse sand was encountered which are similar to those described to a depth of 15 feet in the Site Characterization performed by WZI in July, 1987. A coarse grained, cobbly sandstone was encountered during the excavation from a depth of approximately 35 feet to the maximum depth of approximately 45 feet. Ground water was encountered at a depth of approximately 15 feet in boreholes drilled at the site in July of 1987. During the excavation of July-August 1993, ground water was reached at a depth of approximately 45 feet. drop ground The in water levels compatible with the regional drop in the same time period due to drought conditions. V. FIELD METHODOLOGY Excavation Pro,qram Excavation of the gasoline contaminated soil was completed using an FMC Link Belt 3400 excavator and a John Deer 644 loader. The excavation was backfilled with a Caterpillar D6 bulldozer and the John Deer 644 loader. A 4200 gallon water truck was used to add moisture to the soils during backfill. Approximately 2700 cubic yards of soil was excavated from the Leo Black property and stockpiled on-site during January, 1991. Approximately 660 cubic yards of this soil was segregated as contaminated. The aerial extent of the January 1991 excavation and the locations of the stockpiled'soils are summarized on Exhibit 2. Additional excavation of gasoline contaminated soils was 'conducted between July 26 and-August 6, 1993 on both the Leo Black property and the Read Parcel located immediately adjacent to the north. The maximum aerial extent of the excavation to the north of the Leo Black site onto the Read Parcel was 30 feet. The excavation reached a maximum depth of 45 feet where ground water was encountered. 02060010.011 Page 3 After the analytical results determined that all contamination had been removed, the excavation was backfilled with uncontaminated soils which were stockpiled on-site. Compaction of the backfill soils was certified by M&T Agra Incorporated.. All compaction tests exceeded the required 85%. The results of the compaction tests are summarized in Appendix I. Soil Sampling Pro.qram Soil samples were collected for chemical analysis in brass tubes, each 2 1/2 inches in diameter and 6 inches long. The sample tubes were labeled and the ends covered with aluminum foil, capped with plastic and secured with plastic tape. Samples were stored on ice pending delivery with Chain of Custody documents (Appendix II) to BC Laboratories in Bakersfield, California, a California Department of Health Services (DOHS) certified laboratory. Sampling dudng the on-site investigation was conducted at several times: · On July 26, 1993, a total of four soil samples were collected from the contaminated soil which had been stockpiled during the January, 1991 excavation, to determine if the material was suitable for use as backfill. Each contained a composite of soil collected from three separate locations (Exhibit 2). · A total of 15 samples were collected from the excavation between July 28 and July 30, 1993 to confirm that gasoline contamination had been removed. Soil samples were not collected from the bottom of the excavation due to the presence of ground water. The sampling was witnessed by Dolores Gough from the Kern County Environmental Health Services Department. Sample locations are summarized on the Soil Excavation Site Plan (Exhibit 3) and the Cross Sections (Exhibit 4). 02060010.011 Page 4 VVZI lNG 'e A total of 9 samples were collected from contaminated soils which were stockpiled on-site during the July 26 - August 6, 1993 excavations. Sample locations were selected utilizing a representative sampling technique which systematically selects sampling points from a sampling grid using random numbers following U.S. Environmental Protection Agency (EPA) guidelines in SW 846. Three intermediate soil samples were collected during the excavation (LB- 5, LB-6, LB-7) to characterize the contamination. Sample locations are summarized on the Soil Excavation Site Plan (Exhibit 3). Ground Water Sampling Program A ground water sample was collected from the bottom of the excavation in glass vials provided by BC Laboratories. VI. LABORATORY METHODOLOGY The soil samples and the ground water sample were delivered to BC Laboratories in Bakersfield, California for chemical analysis. BC Laboratories is a California Department of Health Services Certified laboratory. Soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-G)(EPA Method 8020). Selected samples were also analyzed for total petroleum hydrocarl~ons as diesel (TPH-D)(EPA Method 8020), BTEX (U.S. Environmental Protection Agency (EPA) Method 8015M/8020) and soluble lead (SW6010 or SW7000 Methods). The ground water sample was analyzed for total petroleum hydrocarbons as gasoline (TPH-G), total petroleum hydrocarbons as diesel (TPH-D) and BTEX. 02060010.011.. Page 6 VII. ANALYTICAL RESULTS Results of the laboratory analysis of the confirmation soil samples from the excavation collected between July 26 and August 6, 1993 are presented in Appendix III and summarized in Exhibit 5. Results of the ground water sample collected on July 29, 1993 are presented in Appendix IV and also summarized in Exhibit 5. Results of the characterization samples collected from the 1991 and 1993 stockpiled soils are presented in Appendix III and summarized in Exhibit 5. Stockpiled Soil Characterization - 1991 Excavation No contamination was detected in any' of the four confirmation samples (LB-l, LB-2, LB- 3, LB-4) collected from the 1991 stockpile to determine the suitability of this soil as backfill material. Leo Black Property and Read Parcel No contamination was identified in ,the fifteen confirmation samples, verifying that all the gasoline contamination had been removed. Stockpiled Contaminated Soil- 1993 Excavation Gasoline and diesel contamination were detected in two of the intermediate samples (LB-6, LB-7) collected during the excavation. Contamination identified as diesel in sample LB-7 was noted by BC Laboratories as not being truly characteristic of diesel and possibly consisted of other hydrocarbon compounds that would volatilize in the diesel range. No contamination was detected in' any of the nine samples collected from the contaminated soils which were stockpiled on-site during the July 26 - AUgust 6, 1993 excavation. 02060010.01 i Page 6 Ground Water Samplin,q Both gasoline and diesel as well as a minor amount of xylene, were reported in the ground water sample collected from a depth of approximately 45 feet. The contamination identified as diesel was also noted as not being truly characteristic of diesel, similar to the diesel contamination identified in soil sample LB-7. Numerous sources of hydrocarbon contamination have been identified on surrounding sites (Exhibit 6) which have probably affected the shallow ground water in the area. ,i,~. Diesel-type contamination identified in soil samples LB-6 (32 feet) and LB-7 (34 feet) is probably from the contaminated ground water as water levels at the site have been as shallow as 15 feet in 1987 (WZI, 1987). In addition, there is no historical evidence for the on-site storage or use of any fuel other than gasoline. 0206001O, Oll Page 7 WZl INC VIII. REFERENCES WZI Inc., July, 1990, Leo Black Estate Site Remediation Work Plan Revised Technical Approach, unpublished consulting report. Wilson Zublin Inc. 0NZl Inc.), July, 1987, Leo Black Electric Site Characterization, unpublished consulting report. United States Environmental Protection Agency, September, 1986, Test Methods for iii Evaluating Solid Waste, Physical/Chemical Methods, SW-846. 02060010.011 Page 8 ' Prim~ry Scl~ · BM _~ ~ .................. '~.:. . geardslc li.l ' I oRR4' . .... .., . o I ,I , ' "' c~.....' ......... ~ ............ SITE LOCATION '.' / "_.. _'r'" ~~'~ . ,,~ ....-' o ~*° o,/,~, ~ .~a. ' , ~ ' '-- ~' ' ~' / / 24 · o~/ o ~ ~ l 22 : '- °'~"'"° " ' '"":' "/I -~ ~[ i..~~ · 'o :.' :~ m.i L.~ "l I ' ~ ' Lun(lc~ " "2& · ,[~' U/lo 21 . T29S / R27E MI , BAKERSFIELD, CALIFORNIA LEO B~CK ELECTRIC ~ PIERCE ROAD, BAKERSRELD, C~ 0, 200o' 4~00' LOCATION MAP SCALE IN FEET ~93 ~.~10A ~HIBIT 1 EXHIBIT 5 LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY EXCAVATION SAMPLES COLLECTED 7/26/93 THROUGH 8/6/93 Sample Number: LB-1 LB-2 LB-3 LB-4 LB-5 LB-6 LB-7 LB-8 LB-9 LB-10 LBo11 LB-12 LB-13 LB-14 LB-15 LB-16 LB-17 Sample Type: Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Depth: I fL t ft. I ft. 1 ft. 30 fL 32 fL 34 ft. 40 ft. 40 ft. 40 ft. 40 fL 40 fL 40 It. 40 ft. 40 fL 25 ft. 25 fL Units TPH Gas rog/kg ND ND ND ND ND 14.00 430.00 ND ND ND ND ND ND ND ND ND ND TPH Diesel mg/kg ND ND ND ND ND 100.00 680.00 ........... Benzene mg/kg ND ND ND ND ND ND ND .......... Toluene mg/kg ND ND ND ND ND ND ND .......... Ethylbenzene rog/kg ND ND ND ND ND ND ND .......... Xylenes rog/kg ND ND ND ND ND ND ND .......... Lead rng/liter .................. Sample Number: L6-18 LB-t9 LB-20 LB-2I LB-22 LB-23 LB-24 LB-2$ L8-26 LB-27 L6-28 Le-2g LB-30 L8-31 ili!!iiii!i!!i!iiii!i?i:!i:' IR-W-! Sample Type: Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil i:ii:?:i:i:?:i:~i:::;' Wate~ Depth: 25 ft. 25 fL 15 ft. 15 ft. 15 fL 1 fL 1 ft. I fl. 1 ft. I fl. I fL I fL I fl. I fl. ::::i?:i.i!:::.:::i::i-ii:~: 45 fL rPH Gas mg/kg ND ND ND ND ND ND ND ND ND ND ND ND ND ND ~ii!iiiiiiii?:i:.~;:.iii:::i:~ 7100 u i'PH Diesel rog/kg ................. :=?:i?:~:!i?.i:!~iiiii::iii:~i: 2300 u Benzene mg/kg ................ ??:~:i::?:::iii::?: ND Toluene mg/kg ................ i::!;iiii;ii~.?~.i~:ii ::i;. ND i.i;i,:.;.i.i.i.!.:...!...: ~ ND Ethylbenzene rog/kg ................. : ........................ Xylenes mg/kg ................... :::::::::::::::::::::::::::::::::::::::::::::: 280 Lead rog/liter ..... 0.84 - ND -- 1.50 ND - 3.30 0.69 :i!!!iiiiiiii?.i?.i::iiii~; - 0e/2'//~3 ,Kw LEOSI. ACF,/EXHI85 RADIUS SAN JOAQUIN REFINERY TEXACO REFINERY LEO BLACK ELECTRIC 30gO PIERCE ROAD, BAKERSFIELD, CA. Brlflan Rd. POWER MACHINERY Gu# SS 3818 PIERCE RD. Gelfy St. B I DAVIES OIL COMPANY .3505 1/2 GULF ST. ,,~ridian Ave. Turcon Ave. Orin Wy. ASSURED TRANSPORT UNION CARBIDE ~ 3228 GIBSON RD. ~ 3505 PIERCE RD. Glllmom Aw. WZI INC. BAKERSFIELD. CALIFORNIA 0 Fee t 2000' LEO BLACK ELECTRIC 3090 PIERCE ROAD, BAKERSFIELD, CA. 0 Miles %mi. . OFFSITE NEAR BY SOURCES OF 0 Kilometers .501<m GROUNDWATER CONTAMINATION l .... '' · ~ o~o~.oo,oA Table I Summary of In-Place Soil Field Density Tests and Compaction Determinations for 3901 Pierce Road ' Bakersfield, California Prepared for the Leo Black Estate Field Density Test Method - Nuclear - AsTM D2922-8i Field Moisture Test Method - Nuclear - ASTM D3017-78 Field Density Test Method - Sand Volume - ASTM D1556-90 Laboratory Moisture-Density Relationship - ASTM D1557-78 Required Relative Compaction - 85% Notes: 1 Test Performed in accordance with the Sand Volume Method Job No. 593-213 Table I (Continued) August 13. 1993 3901 Pierce Road Leo Black Estate Below Field Field Optimum Lab Test Finished Test Moisture Dry Moisture Dry % Retested Number Date Surface Location % Density % Density Comp By Notes I 8/3/93 40 See Site Sketch 1.2 117.1 5.5 119.7 98 2 8/3/93 37 See Site Sketch 2.2 117.5 5.5 119.7 98 3 8/3/93 34 Sec Site Sketch 3.8 109.9 5.5 119.7 92 4 8/3/93 31 See Site Sketch 2.5 107.7 5.5 119.7 90 5 8/3/93 29 See Site Sketch 5.5 109.6 5.5 119.7 92 6 8/3/93 26 See Site Sketch 3.2 112.6 5.5 119.7 94 7 8/3/93 23 See Site Sketch 5.9 111.6 5.5 119.7 93 1~ 8 8/3/93 20 Sec Site Sketch 7.4 103.2 5.5 119.7 86 1 9 $/3/93 18 See Site Sketch 4.0 102.9 5.5 119.7 86 1 10 · 8/3/93 16 See Site Sketch 4.5 113.0 5.5 119.7 94 1 11 8/4/93 14.5 See Site Sketch 6.3 111.2 5.5 .119.7 93 1 12 8/4193 13 See Site Sketch 5.7 103.0 5.1 109.3 94 1 13 8/4/93 11 Sec Site Sketch 5.4 97.9 5.1 109.3 90 1 14 8/4193 9.5 See Site Sketch 6.9 102.3 6.3 116.4 88 1 15 8/4/93 8 Sec Site Sketch 3.2 106.5 6.3 116.4 91 I ' 16 815/93 7 Sec Site Sketch 3.0 115 6.3 116.4 99 17 8/5/93 6 See Site Sketch 6.1 108.0 6,3 116.4 93 18 8/5/93 5 See Site Sketch 5.6 109.0 6.3 116.4 94 19 8/5/93 4 See Site Sketch 6.4 111.9 6.3 116.4 96 20 8/5193 3 Sec Site SRetch 15.0 105.9 6.3 116.4 91 · 21 8/5/93 2 Sec Site Sketch 3.7 111.7 6.3 116.4 96 22 8/5193 1 Sec Site Sketch 8.1 109.8 6.3 116.4 94 23 .815/93 0 See Site Sketch 8.5 108.9 6.3 116.4 94 Page I ., TABLE H Maximum Laboratory Density The maximum dry density and optimum moisture content of selected representative soil types utili~.ed in the compaction fill were determined in the laboratory in accordance with ASTM Soil Compaction Method D1557-78. The optimum moisture contents are in percent dry weight, and the maximum dry densities are in pounds per cubic foot. The double-letter soil classifications that follow the Soil Descriptions are in accordance with the Uniform Soil Classification System (ASTM Designation D2487-69). The results of the laboratory compaction tests are as follows: Soil Description Maximum Optimum and Classification Dry Moisture Density Content (pcf) (%) Brown fine to medium SAND with accessory SILT (sp) 109.3 5.1 Brown fine to medium SAND with accessory SILT and 119.7 5.5 GRAVEL (sp) Brown fine to medium SAND with accessory SILT (sp) 116.4 63 Post Olfice Box ,, - '--~ Bakersfield, Calilornia 93389-9217 CHAIN OF CUSTODY DOCUMENT '.'. " Job Number: _,~O d;;. o~[O WZI Inc. ,ample Type: (check one) ~ Drinking Water .. SurfaceWater WasteWater OII ~Sludge. · Other (specily) Sample ~llected Collector's Name Type of Analysis .. I I " I I I I I I ~ample Relinquished by: Tim~: Date: ~ample Received by: Time: D~te: Sample Condition When Rece~y Lab: 00/j..~_ Time; Date: Post Office Box 7 : Bakersfield, Calitornia · 93389-9217' CHAIN OF CUSTODY DOCUMENT Job Number: 0.2~C, ~ ~ 0 WZl Inc. ;ample Type: !check one) ~ Drlnklng Water .. SurfaceWater ..WasteWater ..... 011 ~Soil ~. Sludge. Other (specify) Sdmple Number Date Collected Collector's Name Type of Analysis Sample Relinquished by: Time; Date: Sample Received by: Time: Date: .y 'Lab: ' Sample Condition When Received Time; I~ate: Lab Signature: Time; Date: Post Office ~ox ', Bakersfield, Calito-rnia 93389-9217 CHAIN OF CUSTODY DOCUMENT Job Number: '/'~~. ~'~ / ~) WZ! Inc. ;ample Type: (check one) ~ Dflnklng Water SurfaceWater Waste~ater 011 ~Soli ~ Sludge. Other (speclfy) Sample Number D~le Collected Collector's Name Type of Analysis .. Sample Relinquished by: Tim~; Sample Received by: Tim~: Date: Sample Condition When Received By Lab: ~ ~ ~ , Tim,; ~.'/~-- Date: . Post Qffice Box c. ' Bal<ersfield, Calilornia , 93389-9217 CHAIN OF CUSTODY DOCUMENT " Job Number: 0,20 ¢, ~,o/'D WZ[ Inc. ;ample Type: (c)eck one) ~ Drinking Water SurfaceWater . .WasteWater .OI1' - ~ .... Soil ~ Sludge. Other (specify) ['.~ ~~.. /~ /.--.. ,I ~ ~ Sample Number Date Collected Collector's Name Type of Analysis I ;. I ~ample Relinquished by: Tim~: .ample Received by: Tim~: p~te: ~ample Condition When Received By Lab: ~ ~~ Time; X Report To: ~ · E~ Lab// . Sample Description Date & Time Sampled. '~ !.~ Comment: ' Billing Info: ,.. Relinquishe;d by: ()Signature, I:)~j{iv,~)': ,Signature,/ ,,.._./.~ Bate: ,,mecj~ Name: . Rehnqmshed by':'('S~gnat~ I~¢'~1 (Signatur )~ ,j~ r.. }., City state Relinquished by: (Signature) Received by: (Signature, ._.) i Date: Time: . Attention: Relinquished by: (Signature) Received by: (Signature, Date: Time: · Sample Disposal P.O.# Relinquished b~,: (Signature) Received by: (Signalure) ' Date: Time: 13 BO, Oisposal @ 5.00 ea. . . ~ ~ ........ 13 Return to client Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT .... ~eport: 07/29/93 P.O. BOX 121 La~-~Y'-'93-07347-1 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LEO BLACK PROJECT ~0206.0010 LB-1 SOIL IN BRASS TUBE, SAMPLED ON 07-26-93 · 3:00PM BY ALLEN WAGGONER. Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil i Date Sample Date Sample Date Analysis t. Collected: Received ~ Lab: Completed: ~ 07/26/93 07/26/9'3 07/28/93 Minimum .. Analysis Reporting Reporting Constituents Results Units Level Benzene None Detected mg/kg 0.005 Toluene ................. None Detected mg/kg 0.005 - 'Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes . None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. Total Petroleum Hydrocarbons (diesel) None Detected mg/kg 10. California D.O.H.S. Cert. ~1186 Deparment Sdpervisor cc: WZI - AT.L~-N WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab ~: 93-07347-2 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LEO BLACK PROJECT ~0206.0010 LB-2 SOIL IN BRASS TUBE, SAMPLED ON 07-26-93 · 3:00PM BY ALLEN WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample Date Analysis ~" Collected: Received ~ Lab: Completed: 07/26/93 07/26/93 07/28/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Benzene .......... None Detected mg/kg 0.005 Toluene None Detected mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) ~ None Detected mg/k~ 1. Total Petroleum ..~ Hydrocarbons (diesel) None Detected mg/k~ 10. California D.O.H.S. Cert'. ~1186 Department Supervisor cc: wzI - ALLEN WAGG6N~R Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab ~: 93-07347-3 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LEO BLACK PROJECT %0206.0010 LB-3 SOIL IN BRASS TUBE, SAMPLED ON 07-26-93 % 3:00PM BY ALLEN WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020.. Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: ReceiVed ~ Lab: Completed: 07/26/93 07/26/93 07/28/93 Minimum Analysis Reporting Reporting Constituents Results' Units Level Benzene ........ None Detected mg/kg 0.005 - Toluene None Detected mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) ~ None Detected mg/kg 1. Total Petroleum Hydrocarbons (diesel) None Detected m~/kg 10. California D.O.H.S. Cert. ~1186 Department Supervisor cc: WZI - A/~LEN WA~GONER · Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab %: 93-07347-4 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LEO BLACK PROJECT %0206.0010 LB-4 SOIL IN BRASS TUBE, sAMPLED ON 07-26-93 ~ 3:00PM BY ~?.?.EN WAGGONER. TEST METHOD.' TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/26/93 07/26/93 07/28/93 Minimum Analysis Reporting Reporting Constituents ~. Results Units Level Benzene ......... None Detected mg/kg 0.005 - Toluene None Detected mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) ! None Detected mg/kg 1. Total Petroleum Hydrocarbons (diesel) None De=ec=ed mg/kg 10. California D.O.H.S. Cert. %1186 Department Supervisor cc: WZI - ~L?.RN WAGGONER " Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-1 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB %0206.0010 LB-5 (SOIL), SAMPLED ON 07-28-93 BY A. WAGGONER. '"/ TEST HETHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample " Date Analysis. Collected: Received ~ Lab: Completed: 0?/28/93 o?/2~/93 o7-3o-93 Minimum '" Analys i s Reporting Reporting Constituents Results Units Level BenZene None 'Detected mg/kg 0.005 Toluene None Detected mg/kg 0. 005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum ~ydrocarbons (gas) None Detected mg/kg 1. Total Petroleum Hydrocarbons (diesel) None Detected mg/kg 10. California D.O.H.S. Cert..a1186 Department Supervisor cc: WZI ~...... .. .: .T .. .. · ,~..-.. · _ ..:.~ ..... . -~ ·. . . "~':':~,:' ~' ~. :i..' ' .,.:. '~:;' "~ : ..-': · ~ -' "7.3 },. "' · ~:, . ".%.,, ,.~;~..~ ..' Petroleum Hydrocarbons ESTATE OF LEO BLACK ... Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab %: 93-07496-2 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB %0206.0010 LB-6 (SOIL), SAMPLED ON 07-28-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by-EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample Date Analysis ... Collected: Received ~ Lab: Completed: 07/28/93 07/29/93 07-31-93 'Minimum Analysis Reporting Reporting Constituents Results Units Level Benzene None Detected mg/kg .. 0.005 Toluene None Detected mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes .None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) 14. mg/kg 1. Total Petroleum ~ Hydrocarbons mg/kg 10 (diesel) 100 California D.O.H.S. Cert. %1186 Department Supervisor Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-3 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-7 (SOIL), SAMPLED ON 07-28-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/28/93 07/29/93 07-30-93 Minimum Analysis Reporting Reporting Constituents Results Units Level Benzene None'Detected mg/kg 0.04 Toluene None Detected mg/kg 0.04 Ethyl Benzene None Detected mg/kg 0.04 Total Xylenes None Detected mg/kg 0.09 Total Petroleum Hydrocarbons (gas) , 430. mg/kg 9. Total Petroleum Hydrocarbons (diesel) 680. mg/kg 100 'Note:'"High'reported 'PQLis due to high hydrocarbon ba~kground~ " -' " California D.O.H.S. Cert. ,~1186 Department Supervisor CC: WZI ~ BTXE Analysis .ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: . 07/30/93 P.O. BOX 121 Lab %: 93-07560-1 WOFFORD HEIGHTS, CA 93285 Sample Descrigtion: JOB %0206.0010:LB-8 (SOIL) 07-29-93 SAMPLED 'BY A. WAGGONER TEST M~THOD.' TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample .Date sample Date Analysis Collected: ~ ...... " ~.- Received ~ Lab: .. Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert..=1186 Department Supervisor cc: WZI - ;tLLEN WAC~ONER '. .... ~',]".~,,~ .... ~.~ "' ~i.', ~.',!. ,., BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-2 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-9 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample ._ Date Sample -" D~te AnalYsis Collected: Received ® Lab: Completed: o7/2~/93 o7/29/~3 07/2~/~3 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons.(gas) None Detected mg/kg 1. California D.O.H.S. Cert..~1186 Department Supervisor cc: WZI - ALLEN WAGGONER - "~ _ . BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-3 WOFFORD HEIGHTS, CA 93285 Sample Description: jOB ~0206.0010:LB-10 (SOIL) 07-29-93 SD/~PLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Con. sti~ue~t~ Results Units Leve.1 Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 Department Supervisor cc:. WZI - ALLEN WAC~ONER ':'i '. BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-4 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-11 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual' Method - Modified EPA 8015 Sample Matrix: Soil Da~e sample Date Sample Date Analysis Collected: 'Received ~ Lab: Completed: 07/29/~3 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. #1186 Department Supervisor cc: WZI - ALLEN WAGGONER BTXE Analysis ESTATE OF' LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-5 WOFFORD HEIGHTS, CA ~3285 Sample Description: JOB ~0206~0010:LB-~2 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER sample Matrix: Soil Date Sample Date Sample' Date A~alysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/29'/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. $1186 Departmen~ Supervisor cc: WZI - ALLEN WAGGONER BTXE Analysis ESTATE OF LEO BLACK Date of C/O. TOM GILBERT " Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-6 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010: LB-lB (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.0.H.S. / L.U.F.T. Manual Method - Modified EPA.8015 Sample Matrix: Soil Da~e Sample Date Sample Date Analysis Collected: Received % Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 Department ~uperwisor cc: WZI - ;tLLEN WAGGONER · BTXE Analysis ESTATE OF LBO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-7 WOFFORD HEIGHTS, CA 9328S Sample Description: JOB $0206,0010: LB-lA (SOIL) 07-29-93 SAI~PLED BY A, WAGC~DNER TEST METHOD: TPH by D.O,H,S, / L,U,F,T, Manual Method - Modified EPA 8015 Sample Matrix: Soil ":' '~' ....... · ....... ' ...... U."': .'. ~i -. Date Sample Date Sample Date Analysis Collected: Received % Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1, California D,O,H,S, Cert, ~1186 Department S~pervisor ''. cc: WZI - ~LL~N WAGGONER '"..' . ..!... .. ..... .~... . ... ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-8 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB #0206.0010:LB-15 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 Department Supervisor · cc: WZI - ALLEN WAGGONER' BTXE Analysis ESTATE.OF LEO BLACK Date of C/OTOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab $: 93-07560-9 WOFFORD HEIGHTS, CA 93285 Sample'Description:. JOB ~0206.0010:LB-16 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date· Sample Date Sample Date Analysis Collected: Received e Lab: Completed: Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum . Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. cert. ~1186 '~ .... '..~.. Department Supervisor cc: WZI - ALLEN WAGGONER . · ','.'~" 'BTXE Analysis ESTATE OF LEO'BI~CK Date of C/OTOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-10 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB %0206.0010:LB-17 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER f'~ TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Meehod - M~dified ~PA 8015 Sample Matrix: Soll Date Sample Date Sample Date Analysis - ' ' Collected: Received @ Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 Department Supervisor ................cc: .. WZI -.. ALLEN.. WAGGONER ~.: ......... : . BTXE Analysis ESTATE OF LEO BLACK' Date of C/O TOM GILBERT Report: 07/30/93 P.0~ BOX 121 Lab ~: 93-07560-11 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-18 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soll Date Sample Date Sample Date Analysis Collected: Received % Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis 'Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~.1186 '.:,." Depart~nent Supervisor cc: WZI - ALLEN WAGGONER . Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07560-12 WOFFORD HEIGHTS, CA 93285 S.amDle Description: JOB ~0206.0010:LB-19 (SOIL) 07-29-93 SA/~PLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: · Soil Date Sample Date Sample Date Analysis Collected: Received $ Lab: Completed: 07/29/93 07/29/93 07/30/93 Minimum Analysis Reporting Reporting Constituents ResulDs Units Level Total Petroleum Hydrocarbons (gas). None Detected mg/kg 1. California D.O.H.S. Cert. Departmene Supervisor cc: WZI - AJ~LEN WAGGONER .. Petroleum Hydrocarbons ESTATE OF LEO BLACK ~ Date of C/OTOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab %: 93-07560-13 WOFFORD HEIGHTS, CA 93285 Sample Description: 'JOB %0206.0010:LB-20 (SOIL) 07130-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: 'Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/30/93 07/30/93 07/30/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) 'None Detected mg/kg 1. California D.O.H.S. Cert. %1186 .'. Department Supez'~i sot cc: ...WZI - A.LI~N WA~...~R Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab %: 93-07560-14' WOFFORD HEIGHTS, CA 93285 Sample Description: JOB %0206.0010:LB-21 (SOIL) 07-30-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Dat~ Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/30/93 07/30/93 07/30/93 Minimum Analysis Reporting Reporting Constituent~ Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert..~1186 . . '.. _.. Department Supervisor _ cc: WZI - ALLEN WAGGONER .. _ ~D~ATC~m~S Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab %: 93-07560-15 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB %0206.0010:LB-22 (SOIL) 07-30-93 SA/~PLED BY A. WAGGONER TEST HETHOD: TPH by D.'O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/30/93 07/30/93 07/30/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocakbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. %1186 Deparment Supervisor cc: WZI - ALLEN WAGGONER '..' 'Petroleum Hydrocarbons ESTATE OF LEO BLACK Da~e of C/O TOM GILBERT '-. Report: 08/19/93' '~P.O.. BOX 121 'Lab %: 93-07981-2 WOFFORD HEIGHTS, CA. 93285 000-0000 Sample Description: JOB ~0206.0010 LB-23, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample. Date Analysis Collected: Received % Lab: Completed: 08/09/93 08/09/93 08/12/93 .Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum' Hydrocarbons (gas) None Detected mg/kg 1. Depar~nt Superviso~) cc: WZI - ALLEN WAGGONER · Petroleum Hydrocarbons ESTATE OF LEO BLACK Date' of C/O TOM GILBERT' Report: 08/19/93 P.O.' BOX 121 Lab ~: 93-07981-3 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-24, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH D.O.H.S. / L.U.F.T. Manual Method Modified EPA 8015 Sample Matrix: Soil Date Sample --. Date Sample Date Analysis Collected: Received ~ Lab: Completed:. 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Repdrting Constituents Results Units Level Total Petroleum Hydrocarbons (gas). None Detected mg/kg 1. 'California D.O.H.S.' Cert. ~1186 '"~' DeparL-me'nt Superviso~ . cc :' WZI - ALLEN WAGGONER Petroleum Hydrocarbons.' ESTATE OF LEO BLACK Date of , C/O TOM GILBERT Report: 08/19/93 i P.O. BOX 121 i ~ Lab ~: 93-07981-4 WOFFORD HEIGHTS, CA 93285 000-0000 !~ Sample Description: JOB ~0206.0010 LB-25, SAMPLED ON 08-09-93 BY A. WAGGONER. '"~ TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 ~ Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: 'Completed: Minimum Analysis Reporting Reporting Constituent~ Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. #1186 " Deparm~t Supervi~ cc: WZI ALLEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/19/93 P.O. BOX 121 Lab ~: 93-07981-5 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-26, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ® Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 ' Depar~.ment SuPervi so~k cc: WZI - ALLEN WAGGONER " ' .". . · ~:.'... . . Petroleum Hydrocarbons ESTATE' OF LEO BLACK Date of C/0 .TOM GILBERT.... Report: 08/19/93 P.O.' BOX 121 Lab ~: 93-07981-6 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-27, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: ~ Received ~ Lab: Completed: 08109193 08109/93 08/~2/93 ................. Minimum Analysis Reporting Reporting Constituents Results Units Level Total.Petroleum Hydrocarbons (gas) None Detected mg/kg 1. '-' California D.O.H.S. Cert. ~,1186 " Depar~en= SupervisOr cc: WZI - A?.~.EN WAGGONER . ... Petroleum Hydrocarbons ESTATE OF LEO BLACK Da=e of C/O TOM GILBERT Report: 08/19/93 P.O] BOX 121 Lab %.: 93-07981-7 WOFFORD HEIGHTS, CA 93285 000-0000 sample Description: JOB %0206.0010 LB-28, SAMPLED ON 08-09-93 BY A. WAGGONER. D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 TEST METHOD: TPH by Sample Matrix: Soil Date'Sample Date Sample --' Date Analysis Collected: Received ~ Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Reporting Constituents Results units Level Total Petroleum Hydrocarbons (gas). None Detected mg/kg 1. California D.O.H.S. Cert. %1186 cc: WZI - ~T.L~N WAGGONER' " Petroleum Hydrocarbons ESTATE OF LBO BLACK Date of C/O TOM GILBERT .... Report:-08/19/93 ' P.O. BOX 121 Lab #: 93-07981-8 WOFFORD HEIGHTS, CA 93285 000o0000 · - Sample Description: JOB %0206.0010 LB-29, SAMPLED ON 08-09-93 BY A. WAGGONER.' ! TEST METHOD: TPH by D.O.H.S. / L.U.F.T. F~anual Method - Modified EPA 8015 Sample Matrix: Soil , Date s~mpie '' Date Sample Date Analysis Collected: Received ~ Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. · ..:.:'.,:. : .... :,. v ' . "'. ". Calif'ornia D.O.H.S~ Cert. ~1186 Department ~upervisor O cc: . WZI - ALLBN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT.' Report: 08/19/93 P.O.'BOX 121 Lab %: 93-07981-9 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB %0206.0010 LB-30, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample. Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. .California D.O.H.S. Cert. %1186 Depar~nt ~upervisor 0 cc: WZI - AI~LEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT .~ Report: 08/19/93 P.O. BOX 121 Lab ~:' 93-07981-1 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-31, SAMPLED ON 08-09-93 BY A. WAC~ONER. T, ST METHOD: . TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received % Lab: Completed: 08/09/93 08/09/93 ' 08/12/93 Minimum Analysis Reporting Reporting Cons t i tuent s Re sul t s Unit s Leve 1 Total Petroleum Hydrocarbons (gas) None Detected mg/kg ' 1. California D.0.H.S. Cert. ~1186 cc: . ' WZI - J~LLEN WA~.~NER · · ESTATE OF LBO BLACK Date Reported: 08/19/93 · C/O TOM GILBERT Date Received: 08/09/93 P.O. BOX 121 'Laboratory No.: 93-07981-2 WOFFORD HEIGHTS, CA 93285 000-0000 ' ' WET TEST EXTRACT CONTAF~INANTS'AI~ALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Sample Description: JOB #0206.0010 LB-23, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Cons t i =uent s mq/1 iter .P.Q.L. Method STLC Lead 0.84 0.5 SW-6010 5.0 Comment: All metals reported above are in mg/liter on a filtrate basis (STLC). These results are based on extracting sample according to Title 22, Article 11, California Administrative Code using a 48-hour citric acid (deionized water for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the .least amount of analyte detectable ...... ' ..... based on sample size used and analytical technique .employed) · · _. . STLC - = Soluble Threshold ~i~it Concentration .. .. .. " REFERENCES: ....... -,....'.-. ............. "SW - "Test Methods for Evaluating Solid Waste~ 'Physical/Chemical Methods", EPA-SW-846, September,.1986. Department Supervi~r cctv. WZI - ALLEN WAGGONER ESTATE OF LEO BLACK " Date Reported: 08/19/93 C/O TOM GILBERT Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-4 WOFFORD HEIGHTS, CA 93285 000-0o00 .WET TEST EXTRACT CONTAMINAlqTS ANALYZED ACCORDING TO TI~E 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Sample Description: JOB ~0206.0010 LB-25, SAMPLED ON 08o09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Constituents mq/liter P.Q..L. Method STLC i '' Lead None Detected 0.5 SW-6010 5.0 comment: All metals reported above are in mg/liter on a filtrate basis (STLC). These results are based on extracting sample according to Title 22, Article 11, California Administrative Code using a 48-hour citric acid (deionized water for hexavalent chromium) extraction. P.Q.L2 = Practical Quantitation. Limit (refers to the least amount'of analyte detectable .... 'J'~<'.'.~ based on sample size used and analytical technique '~mployed). sTL~'-7-:'%J' Soluble Threshold Limit Concentration ..':SW-= "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods",' .. · ".-.'" EPA-SW-846, September, 1986 Depa~nt Sup~ cc:.~:.WZI - ALLEN WAGGONER ESTATE OF LEO BLACK Date Reported: 08/19/93 C/O TOM GILBERT Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-6 WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTRACT CONTAMINANTS ANALYZED ACCOP. DING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Regulatory Sample Results Method Criteria Constituents mq/liter .. P.Q.L. Method STLC L~ad 1.5 0.5 SW- 6010 5.0 Comment: All metals reported above are in mg/liter on a filtrate basis (STLC). These results are based on extracting sample according to Title 22, Article 11, California Administrative Code using a 48-hour citric acid (deionized water for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte detectable ........... based on sample size used and analytical technique.employed). STLC = Soluble Threshold Limit Concentration .- REFERENCES: .... . ". ..... .: .'. '" ..... SW = "Test Methods for Evaluating Solid Waste~'"~ySical/Chemi&al MethodS"'~ EPA-SW-846, September, 1986. Depa~en-~~r cc: WZI - ALLEN WAGGONER ESTATE OF LEO BLACK Date Reported: 08/19/93 C/O TOM GILBERT Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-7 WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTRACT CONTAMINANTS D/~ALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION .. (STLC) Sample Description: JOB #0206.0010 LB-28 SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Constituents mg/1 iter P.Q.L. Method STLC Lead None Detected 0'. 5 SW- 6010 5.0 Comment: Ail metals reported above are in mg/liter on a filtrate basis (STLC). These results are based on extracting sample according to Title 22, Article 11, California Administrative Code using a 48-hour citric acid (deionized water for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte detectable based on sample size used and analytical technique employed). STLC = Soluble Threshold Limit Concentration REFERENCES: SW = "Test Methods for Evaluating Solid Wastes PhySical/Chemical Methods", EPA-SW-846, September, 1986. Depar'~en'6 Superwis~ cc: WZI - DJ~LEN WAGGONER ESTATE OF LBO BLACK Date Reported: 08/19/'93 C/OTOM GILBERT Date Received: 08/09/93 P..O. BOX 121 Laboratory No.: 93-07981-9 'WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTRACT CONTAMINANTS ANALYZED ACCORDING TO TITLE 22, ARTICLE 11, -- CALIFORNIA CODE OF REGIILATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Description: JOB #0206.0010 LB-30, SAMPLBD ON 08-09-93 BY A. WAGGONER. Sample Regulator%/ Sample Results Method Criteria Constituents mq/liter P.Q.L. Method STLC Lead 3.3 0.5 SW-6010 5.0 Comment: All metals reported above are in mg/liter on a filtrate basis (STLC). These results are based on extracting sample according to Title 22, Article 11, California Administrative Code using a 48-hour citric acid (deionized water for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte detectable. ...... ': ...i'... based on sample size used and analytical technique employed). STLC = Soluble Threshold Limit Concentration REFEP, ENCES: '' SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods", EPA-SW-846, September, 1986. Depar~en~ Superviso cC: WZI ESTATE OF LEO BLACK Date Reported: 08/19/93 C/OTOM GILBERT Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-1 WOFFORD HEIGHTS, CA 93285 000-0000 W~T TEST EXTRACT CONTAMINANTS A~U%LYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFOP. NIA CODE OF REGITLATIONS FOR HAZ2%RDOUS WASTE DETERMINATION (STLC) Sample Description: JOB %0206.0010 LB-31, SAMPLED ON 08-09-9~ BY A. WAGGONER. Regulatory Sample Results Method Criteria Constituents mq/liter P.Q.L. Method STLC Lead 0.69 0.5 SW-6010 5.0 Comment: Ail metals reported above are in mg/liter on a filtrate basis (STLC) These results are based on extracting sample according to Title 22, Article 11, California Administrative Code using a 48-hour citric acid (deionized water . for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation'Limit (refers to the least amount of analyte detectable based on sample size used and analytical technique employed). STLC . m Soluble Threshold Limit.Concentration REFERENCES: SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods",. EPA-SW-846, September, 1986. '' ' '' Dephz~ment SuPerv~or cc: WZI - ALLEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ,~: 93-07496-4 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-W-1 (WATER), SAMPLED ON 07-29-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Water Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Benzene None Detected ~g/L 5. Toluene None Detected ~g/L 5. Ethyl Benzene None Detected ~g/L 5. Total Xylenes .280. ~g/L 10. Total Petroleum Hydrocarbons (gas) ! 7100. ~g/L 500. Total Petroleum Hydrocarbons (diesel) 2300. ~g/L ? ?'.' 200. Note: High reported PQL's due to high concentration..of.:.., target analytes.. ": "'~]':"?':.!~i "'' Sample chromatogran~ not typical of diesel. Department Supervisor ... I Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/OTOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-4 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB %0206.0010 LB-W-1 (WATER), SAMPLED ON 07-29-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Water Date Sample Date Sample Date Analysis Collected: Received % Lab: Completed: 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results 'Units Level Benzene None Detected ~g/L 5. Toluene None Detected ~g/L S. Ethyl Benzene None Detected ~g/L 5. Total Xylenes 280. ~g/L 10. Total Petroleum Hydrocarbons (gas) ~ 7100. ~g/L 500. Total Petroleum Hydrocarbons (diesel) 2300. ~g/L .. ]'. 200. Note: High reported PQL' s due to high concentration .of target analytes. Sample chromatogram not typical of diesel. California D.O.H.S. Cert. Department Supervisor CC: WZI APPENDIX III HEALTH AND SAFETY PLAN APPENDIX III SITE HEALTH AND SAFETY PLAN I. GENERAL INFORMATION Client: Leo Black Electric Project Number: 0206.0010 Project Manager: Stephen G. Muir Health and Safety Officer: Bob Blalock Site Safety Officer: Stephen G. Muir Health and Safety Plan Prepared by: Stephen G. Muir Issue Date: January 31, 1995 Effective Period: 180 days I1. SCOPE AND APPLICATION The provisions of this Health and Safety Plan (HSP) are based upon an evaluation of known and/or suspected site contamination only, and are designed to minimize health and safety hazards of site activities as described in the Scope of Work. If during the course of site work new chemical contamination is discovered, or additional site activities described in the of Work become all work shall stop pending an not Scope necessary, evaluation of the new information and appropriate modification of this Plan. The Health and Safety Officer shall direct this evaluation. APPENDIX III 02060010.019 I III. HEALTH AND SAFETY ORGANIZATION Minimum qualifications, duties, and responsibilities of all site personnel: Prolect Manager Hazardous Waste Field Investigation Experience Knowledge of Work Plan Procedures and Equipment Knowledge of Standard Site Safety Procedures and Equipment Training (40 Hour, 3 Day Site Specific) Respirator Fit Tested and Trained Health and Safety Officer Trained Health and Safety Professional or Equivalent ' Site Safety Experience In Hazardous Waste Field Investigations Knowledge of Work Plan Procedures and Equipment Knowledge of Standard Site Safety Procedures and Equipment Training (40 Hour, 3 Day Site Specific) Respirator Fit Tested and Trained Site Safety Officer Site Safety Experience in Hazardous Waste Field Investigations Knowledge of Work Plan Procedures Equipment and Knowledge of Standard Site Safety Procedures and Equipment Air Monitoring Instrument Calibration and Use Respiratory Protective Equipment Maintenance and Use Training (40 Hour, 3 Day Site Specific, CPR, First Aid) Respirator Fit Tested and Trained APPENDIX III 02060010.019 2 Pro!eot Personnel Training (40 Hour, 3 Day Site Specific, 8 Hour Refresher) Respirator Fit Tested and Trained Air Monitoring Instrument Calibration APPENDIX III 02060010.019 3 IV. SITE DESCRIPTION'AND CHARACTERISTICS Site Description: 3909 Pierce Road, Bakersfield, California. Former fuel point for gasoline and diesel trucks. Topographic Map Attached: ~ yes X no Attached to Work Plan Location Map Attached: ~ yes X no Attached to Work Plan V. WORK PLAN _Obiectives: Exploratory soil boring and monitoring well installation et a former underground storage tank release. Approximately 1,000 cubic yards o! hydrocarbon contaminated soil will be remediated by bioremediation and controlled aeration. Remodiated soil will lee placed into the excavation along with the additional clean till, compacted. Excavation will be tilled to the ground surfaco. Tasks: 1. Site Background Investigation 2. SOil Boring, Exploratory Trenching, and Monitoring Well Installation 3. Laboratory Analysis 4. Groundwater Quarterly Monitoring 5. Remediation 'Feasibility Study 6. Interim Remedial Action 7. Report Preparation 8. Administrative Reporting APPENDIX III 02060010.019 4 VI. HAZARD EVALUATION Known and/or Suspected Chemical Contaminants on the Site: Name CAS # PEL IDLH Health Effects Gasoline 8006619 300 ppm 5,000 ppm Central Nervous System (Benzene) 71432 1 ppm 5,000 ppm Central Nervous System - Cancer (Toluene) 108883 100 ppm 5,000 ppm Central Nervous System (Xylene) 1330207 100 ppm 5,000 ppm Central Nervous System Chemical Hazards: Toxic X Ignitable X Corrosive Reactive__ Medical or Biological Waste __ Forms of Chemical Hazards: Solid X Dust X Fiber~ Fume~ Liquid Vapor ,X. Gas Special Characteristics: i.e. shock sensitive or explosives: ~ yes X no Explain: · Possible Gasoline Contaminated Soil APPENDIX III 02060010.019 5 Physical Aaents: Radiation Noise X Heat Stress Describe: Noise around heavy equipment. Safety Hazards: Heavy equipment operations. Trenching cave-ins. Anticipated Hazards by Job Task: Chemical Physical Task Hazards A,qents Safety Hazards 1. Site Background Investigation None None None 2. Soil Boring, Exploratory Trenching, and Monitoring Gasoline Soil and Vapor Heavy equipmen~ .~ Well Installation trenching 3. Laboratory Analysis None None None Monitoring None None None 5. Remediation Feasibility Study None None None 6. Interim Remedial Action Gasoline Soil and Vapor Heavy equipmen~ trenching 7. Report Preparation None None None 8. Administrative Reporting None None None APPENDIX III 02060010.019 6 VII. SITE STANDARD OPERATING PROCEDURES A. personal Protective Equipment (PPE) The contractor and consultant personnel will follow the standard U. S. Environmental Protection Agency (EPA) personal protective equipment convention for all hazardous waste field work, described as follows: Level A PPE Full encapsulating chemical protective suit, positive pressure demand self-contained breathing apparatus, disposable Tyvek Coveralls as the undergarment. Level B PPE Positive pressure-demand self-contained breathing apparatus or supplied-air respirator in positive pressure mode, 5 minute escape bottle worn at the hip, chemical protective suit (permeable Tyvek or impermeable coated Tyvek or Saranex coveralls for splash hazards), chemical protective gloves, inner surgical gloves, chemical protective boots with steel toe and steel shank, hard hat. Level C PPE Full face or half face air purifying respirator, chemical protective suit (permeable or impermeable coated Tyvek or Saranex coveralls for splash hazards), chemical protective gloves, inner surgical gloves, chemical protective boots with steel toe and steel shank, hard hat, .safety glasses if half face respirator is worn. APPENDIX III 02060010.019 7 Level D PPE Tyvek coveralls, hard hat, steel toed, steel shank work boots, safety glasses, work gloves. PPE required for each job task depends on the chemical and physical hazards expected of that task, as described above. The following PPE ensembles are assigned to project tasks: Task Assi.qned PPE Ensemble 2. Soil Boring, Exploratory Trenching, and Monitoring Well Installation Level D 3. Laboratory Analysis N/A 4. Groundwater Quarterly Monitoring Level D 5. Remediation Feasibility Study N/A 6. Interim Remedial Action Level D 7. Report Preparation N/A 8. Administrative Reporting N/A L APPENDIX III 02060010.019 8 B. Site Control Initial Site Entry_ The Project Manager shall arrange an initial site briefing with the Health and Safety Officer (HSO). Based on the information provided in this initial Site briefing and on the nature of magnitude of known or suspected site contaminants and the work plan tasks, the HSO shall determine initial site entry procedures and shall specify them below. It is the responsibility of the Site Safety Officer (SSO) to implement these procedures and direct proper site entry. Personal Protective Equipment (PPE) ensemble for personnel to wear during initial site entry: Level D with respirator available. Respirator shall be half mask with organic vapor cartridges (color-coded black and gray) If Level C PPE is required for initial site entry, then all personnel MUST carry a 5 minute escape air bottle. Initial Site Entry Procedures: Level D PPE and as outlined below. Air monitoring with portable photoionization detector Prior to entering the site, the SSO shall calibrate the portable direct-reading air monitoring instruments upwind from site in an uncontaminated area. The SSO shall then determine background readings for all air monitoring instruments in this same upwind, off-site, uncontaminated area. APPENDIX III 02060010.019 9 The SSO shall record the instrument calibration procedures and results and all background readings in the Site Safety Log Book. All personnel must enter the site from an upwind position if possible. C. Work Zones At the beginning of each work shift the WZI SSO shall perform initial air monitoring with portable direct-reading instruments to identify the area(s) onsite where gas and vapor contamination is present. Based on these initial air monitoring readings, the SSO shall establish discrete work zones as follows: APPENDIX III 02060010.019 10 Exclusion Zone or 'Hot' Zone The Exclusion Zone or "Hot" Zone shall be defined as follows: 1. Wherever portable direct-reading air monitoring instruments register anything above the background readings established upwind off-site in uncontaminated areas. 2. If portable direct-reading air monitoring instruments read background of known or suspected chemical contamination, or where drilling, excavation, soil sampling, or other invasive activity is to be performed. Decontamination Zones The SSO shall establish a decontamination corridor adjacent to and upwind from identified exclusion zones. The SSO shall set up both equipment and personnel decontamination areas outlined under "Decontamination Procedures", below. SuppoA Zone The SSO shall establish support zones upwind from the decontamination corridor where all portable direct-reading air monitoring instruments read background, at a distance of at least 20 meters from the exclusion zone. The support zone shall be established such that support personnel may observe all personnel in the exclusion zone at all times. APPENDIX III 02060010.019 11 If personnel must enter trenches or other excavations, a "buddy" shall remain near the excavation to maintain visual contact ("line of sight") with the personnel inside the excavation at all times. The SSO shall develop and teach all site personnel a system of hand signals that will enable the "buddy" to indicate to support zone personnel that an emergency exists inside the excavation. The SSO shall monitor the area at least every 15 minutes with the portable direct-reading air monitoring instruments to detect any changes in gas or vapor contaminant dispersion onsite. In addition, the Action Levels and corresponding Actions as described in the HSP shall be followed. If the wind changes direction and/or gas, vapor, or dust contamination moves into the established decontamination or support zones in concentrations that exceed permissible Action Levels established by the HSP, then the SSO shall direct site personnel to move the support zone to the new upwind area, confirming the absence of gas or vapor contamination with the portable direct-reading air monitoring inStruments. D. Air Monitorinq Direct-Readinq Air Monitoring Instruments follow instruments available for field work all that apply): The direct-reading (check are Organic Gases and Vapors: Thermo Environmental Organic Vapor Meter (OVM) X HNu Photoionizer Photovac Microtip Foxboro Organic Vapor Analyzer Colorimetric Detector Tubes X APPENDIX III 02060010.019 12 Inor.qanic Gases:. Hydrogen Sulfide Detector Hydrogen Cyanide Detector Combustible Gases, Vapors, and Oxygen Detector combination Combustible Gas ! Oxygen Detector, (calibrated to the combustible gas or vapor expected). Ionizin.q Radiation Geiger-Mueller counter capable of detecting alpha, beta, and gamma radiation. U. $. £~ Direot-~ading Air Monitorinfl Instrument ~¢tion Levels and ~¢tion~ for Hazardous Waste Operations. Monitoring Results (Action Level) Action Total Or.qanic Vapors: 0 ppm or "background" (BG) Level D PPE Above BG to 5 pprn breathing zone Level C PPE 5-500 ppm breathing zone Level B PPE 500-1000 ppm breathing zone Level A PPE > 1000 ppm breathing zone Evacuate APPENDIX III 02060010.019 · 13 Inorganic (~ases (H2S. HCN) Background to 5 ppm breathing zone Level D PPE 5-40 ppm breathing zone Level B PPE >40 ppm breathing zone Level A PPE or evacuate Flammable Gases and Vapors. Background Level D PPE BG-20% LEL Level D PPE if methane; evacuate if organic vapors also read > 1000 ppm >20% LEL Ventilate below 20% LEL; stop work if unsuccessful OxyRen 19.5%-21% Level D or Level C PPE <19.5% Level B PPE Radiation Background Continue work Two times background Stop work. Call Environmental Health Department, Monitor area thoroughly, Call HSO. APPENDIX III 02060010.019 14 Site Specific Air Monitorin.q Equipment and Procedures. Air Monitoring Where Frequency Action Instrument Contaminants Monitored of Monitoring Level Action HNu, OVM or Organic Microtip Vapors Photoionizer Foxboro Organic OVA Vapors Combustible Combustible Gases Gases and Indicator Vapors and Oxygen Hydrogen Hydrogen Sulfide Sulfide Detector Colorimetric Organic and Tubes Inorganic Gases and Vapors Radiation Ionizing Detector Radiation Other Special Air Samplin,q Procedures: None. E. Site Safe Work Practices 1. Daily Safety Meeting 2. Onsite Health and Safety Monitoring 3. All trenches shall be sloped at or beyond the angle of repose. APPENDIX III 02060010.019 15 F. Trenching and Excavation Safety Procedures G. Decontamination -Personnel Personnel will wear Tyvek garments and gloves. These will be disposed of onsite. Equipment 1. Wash down onsite and rinse with clean water. H. Procedures for Disposal of Wastes and Derived Materials 1. All waste water and soil will be placed on contaminated soil pile and covered. I. Site Safety Meetings Before beginning site work the SSO shall conduct a site safety meeting to discuss the. following: The tasks to be performed; The safe work practices to be followed to minimize exposure to chemical and physical agents and to minimize accidents APPENDIX III 02060010.019 16 W~I ~NC The SSO shall document the date, time, and attendance of all site safety meetings together with a short description of the topics discussed in Appendix a of this Plan. J. Prohibited Activities and Work Limitations · No eating, drinking, smoking, or chewing of tobacco Enter exclusion zones with a buddy at all times No 'Hot Work' - Welding, Cutting, Grinding without permission from SOS (Hot Work Permit) · Daylight hours only K. Health and Safety Equipment and Materials Respirators Coated or Uncoated Tyvek Chemical Protective Gloves Duct Tape Safety Glasses Hard Hat Steel-Toed Steel Shank Chemical Protective Boots Decontamination Materials Drinking Water and Cups Folding Table and Chairs Parasol Clock Walkie Talkies First Air Kit Blue Ice ABC Fire Extinguishers Emergency Alarm Equipment APPENDIX III 02060010.019 17 W"Z~ tNC L. Record Kee_Dina Site Safety Log Site Conditions Work Progress Air Monitoring Instrument Readings Air Monitoring Instrument Calibration Personnel Training Documentation ResPirator Fit Testing Records APPENDIX III 02060010.019 18 Viii. MEDICAL SURVEILLANCE All site employees must be enrolled in a medical surveillance program if they meet any of the following conditions: (Title 8 CCR 5192(f)) 1. If an employee is or may be exposed at or above the Cai-OSHA Permissible Exposure Limit (PEL) (or to other published exposure limits if a PEL doesn't exist for a specific chemical) or 30 days or more pear year, without regard to the use of respirators; 2. If any employee wears a respirator for any part of any day for 30 days or more per year; 3. If an emPloyee becomes, injured, ill, or develops signs or symptoms due to possible overexposure involving hazardous substances or health hazards from an emergency response or hazardous waste operation. IX. SPILL CONTAINMENT PLAN Not Applicable APPENDIX III 02060010.019 19 X. EMERGENCY CONTINGENCY PLAN Attach Map Showing Evacuation Route from Site to Nearest Hospital Attached Emergency Telephone Numbers Ambulance 911 Fire g 11 Police 911 EmergenCy Alarm and Communication Procedures 1. Hand signals shall be developed before site work begins to communicate at a d/stance in noisy areas. 2. Radio communication with emergency teams. Emergency evacuation and equipment shutdown procedures must be developed, ur~derstood, and rehearsed by all site personnel before project work begins. Emergency Evacuation Procedures 1. Shut all equipment down. 2. Evacuate site upwind. 3. Moot at safety point. 4.' Determine status of personnel. 5. Advise authorities/WZl as appropriate. APPENDIX III 02060010.019 20 WZl Xl. APPROVALS Health and Safety Plan Prepared by: Name Signature Date Health and Safety Plan Approved by: Project Manager Signature Date Health and Safety Officer Signature Date Site Safety Officer Signature Date APPENDIX III 02060010,019 21 APPENDIX IV EXPLORATORY EXCAVATION AND SOIL BORING SAMPLING PROTOCOL APPENDIX IV EXPLORATORY EXCAVATION AND SOIL BORING SAMPLING PROTOCOL 1.0 EXPLORATORY EXCAVATION PROCEDURES The lateral and vertical extent of soil hydrocarbon contamination at the subject Property will be determined by surface excavation procedure to attempt clean closure. The area to be excavated will be immediately around the location of the previous underground storage tanks. The excavation plan will provide for a pit extending vertically downward from the area of maximum surface contamination. Equipment will be able to excavate material to a maximum depth of approximately 30 feet. A California State Certified Engineering Geologist will supervise drilling and excavating operations. He will review and supervise the separating and stockpiling of the clean and contaminated soil, make onsite changes in excavation geometry, and record encountered geologic and'hydrocarbon contamination conditions as observed in the field. Excavation of contaminated soil will continue until soil that is believed to be uncontaminated is reached both vertically and laterally along the sides and bottom of the pit. Soil samples will be obtained along the walls and floor of the excavation laterally every 50 feet or as appropriate and will be analyzed for specific constituents as outlined in the workplan. The excavation process will continue until non-detect soil contamination levels are reached for all walls and floors of the pit. Appropriate fencing material will be placed around the excavation to prevent unauthorized entry. After regulatory approval the excavations will be backfilled. APPENDIX IV 02060010.019 I 2.0 SOIL BORING PROCEDURES Soil borings will be advanced until the base of hydrocarbon contamination is reached or the first groundwater is encountered. Samples will be obtained in the manner outlined in Section 3.1 below. During the drilling program a soil log will 'be maintained for each boring according to the Unified Soil Classification System by a California Certified Engineering Geologist. 3.0 SOIL SAMPLING PROTOCOL 3.1 Soil Sampling with Drill Rig A two and one-half inch diameter split spoon sampler fitted with three six inch brass sample tubes will be used to collect samples. In each borehole, samples will be collected at five foot intervals. After drilling to each sampling depth, the sampling apparatus will be inserted into the hollow auger and driven into the undisturbed soil beneath the borehole. Upon recovery, the lower two sample tubes, designated A and B, will be sealed by covering with aluminum foil, capping with plastic and sealing with cloth tape. This sample recovery method minimizes head space in the sample tubes. The samples will then be stored on ice pending delivery to a certified laboratory for chemical analysis and accompanied by appropriate Chain of Custody documents. The material in the third tube and in the sample "shoe" will be examined and described, then discarded. Sample descriptions will include lithology, moisture content, fossil content, and odor. Samples will also be checked with an Organic Vapor Meter (OVM). Uthologic logs for each borehole will be compiled utilizing the sample descriptions. APPENDIX IV 02060010.019 2 The sampler will be washed with a non-phosphate cleaner and double rinsed with water after each use. Auger flights will be steam cleaned after drilling each borehole. This will assure that contamination is not transferred to other boreholes. The cleaning will take place on established cleaning sites and the effluent will be contained. Uncontaminated boreholes (as determined by OVM filed tests) will be backfilled with the same material or cuttings extracted from the hole during drilling after placing five feet of bentonite in the bottom of the hole. Boreholes found to have contaminated soil will be backfilled with a cement and sand slurry containing no more than five percent bentonite. The cuffings from these holes will be placed in U. S. Environmental Protection Agency (EPA) approved, 55 gallon barrels with lids, stored onsite pending laboratory analysis and disposed of at an approved facility if necessary, with the appropriate Chain of Custody documents. Within 30 days a mitigation report will be submitted to the Department of Environmental Health Services which will include three (3) remediation methods. The report will be signed by a Registered Geologist or a Registered Civil Engineer. 3.2 Soil Sampling from Excavation The soil sampling probe for a two-inch drive sampler will be used to collect undisturbed samples from the trench floor or sidewalls. If possible, undisturbed samples will be obtained from the excavator bucket as appropriate. Upon recovery, two sample tubes, designated A and B, will be sealed by covering with aluminum foil, capping with plastic and sealing with cloth tape. This sample recovery method minimizes head space in the sample tubes; The samples will then be stored on ice pending delivery to a certified laboratory for chemical analysis and accompanied by appropriate Chain of Custody documents. Sample descriptions will include lithology, moisture content, fossil content, and odor. Samples will also be checked with an OVM. Uthologic logs for each excavation will be compiled utilizing the sample descriptions. APPENDIX IV 02060010.019 3 The sampler will be washed with a non-phosphate cleaner and double rinsed with water after each use. This will assure that contamination is not transferred to other excavation samples. The cleaning will take place on established cleaning sites and the effluent will be contained. 3.3 Field Identification of Contaminated Soil The field determination regarding the presence or absence of hydrocarbon contamination will be based on visual sample inspection for the presence of staining, odor, and OVM readings. · The presence of odor and staining in conjunction with positive OVM readings will be used to establish the presence of hydrocarbon contamination in soil samples from the excavation. Determination of the absence of contamination in a soil sample will be based on absence of odor, absence of staining and OVM readings in the range of background values. Background OVM readings will be established at the top of the excavation to a depth not greater than five feet. APPENDIX IV 02060010.019 4 APPENDIX V GROUNDWATER SAMPLING PROTOCOL APPENDIX V GROUNDWATER SAMPLING PROTOCOL 1.0 Groundwater Sampling Protocol All equipment that is used in a monitoring well for purging, sampling, or depth measurement shall be decontaminated by steam cleaning or a TSP wash and triple rinse procedure prior to use and before reusing when purging or sampling. Ii-"! 1. The first well to be monitored will be known or suspected clean wells. The next wells to be monitored will be known or suspected wells that will contain contaminated groundwater. The furthest up gradient contaminated well will be monitored first. Subsequent wells will be monitored on a down-gradient basis. 2. The well will be accessed and the wellhead checked for damage and tampering.. 3. The depth to groundwater will be measured from the predetermined measurepoint on the well casing with a sounding tape and recorded to'the nearest 0.01 foot. The time, day, and other observations will be recorded in a notebook. A calculation of the volume of water in the wellbore will be made. 4. The groundwater temperature, pH, and electrical conductivity will be measured with field instruments and recorded in a notebook. 5. A minimum of three to five well volumes will be removed from the wellbore with a pump or bailer. The purging rate will not be so great as to cause the well to go dry or have the formation water cascade down the casing. If purging causes the well to be pumped dry it will be allowed to recharge for up to 24 hours prior to sampling. If the well does not recharge within 24 hours, it will be considered to be a dry well. APPENDIX V 02060010.019 I 6. The purged water will be dUmped or pumped into barrels onsite for holding prior to proper disposal. 7. After purging the temperature, pH, and electrical conductivity will be checked every ten minutes until they stabilize. Stability will be achieved when two consecutive measurements of 0.5 units of Ph, within 2 degrees Fahrenheit for temperature, and within five percent of electrical conductivity measurement. 8. The water samples will be poured from the bailer or pump directly into sample bottles. For bottles without preservation the cap and bottle will be rinsed' two or three times with well water and filled, keeping the head space to zero. For bottles with a preservation, no rinsing will be made and the sample bottle will be filled directly with minimum head space. 9. The samples will be placed in a cooler with dry ice or blue ice for transportation to the analytical laboratory. 10. The samples will be delivered to the laboratory as soon as possible. If the samples are kept overnight they will be refrigerated at 39 degrees Fahrenheit and delivered to the laboratory within 72 hours of sampling time. 11. A chain of custody document will accompany the samples at all times. 12. The wellhead will be secured prior to departure. APPENDIX V 02060010.019 2 Post Office Box 9217 Fresno, California 93720 Bakersfield, California 93389 209/261-9160 805/326-1112805/326-0191 FAX 209/261-9171 FAX WZI ~.c. 1 LEO BLACK ESTATE ' SUMMARY OF EXCAVATION AND REMEDIATION OF CONTAMINATED SOILS 3909 Pierce Road Bakersfield, California August, 1993 Prepared by: WZI Inc. 4700 Stockdale Highway, Suite 120 Bakersfield, California 93309 Susan Chandler Kiser Certified Registered Assessor State of California No. 01095 Expiration Date: 06/30/94 z'~ Oame~ Allen Waggor~ef //(~'ertified Engineering Geologist State of California No. 1818 Expiration Date: 03/30/95 02060010,Ol 1 TABLE OF CONTENTS Pa.qe I. Introduction 1 II. Summary and Conclusions 1 III. Recommendations 2 IV. Geology.and Hydrology 3 V. Field Methodology 3 .......... Excavation Program - . .. · i .... ~-_..~ 3.. Soil Sampling Program 4 Ground Water Sampling Program 5 VI. Laboratory Methodology 5 VII. Analytical Results 6 Stockpiled Soil Characterization - 1991 Excavation 6 Leo Black Property and Read Parcel 6 Stockpiled. Contaminated Soil- 1993 Excavation 6 Ground Water Sampling 7 VIII. References 8 EXHIBITS Exhibit 1 Location Map Exhibit 2 Soil Excavation Site Plan - January 1991 Exhibit 3 Soil Excavation Site Plan - July 26 - August 6, 1993 Exhibit 4 Cross Sections, 26 - 1993 Excavation July August 6, Exhibit 5 Laboratory Analyses Summary Exhibit 6 Off-Site Nearby Sources of Ground Water Contamination APPENDICES Appendix I Soil Compaction Test Results I Appendix II Chain of Custody Records Appendix III Results of Laboratory Analysis of Soil Samples .. Appendix IV Results of Laboratory Analysis of Ground Water 02060010.011 I. INTRODUCTION WZl Inc. has completed excavations of hydrocarbon contaminated soil at the Leo Black Electric site located at 3909 Pierce Road, Bakersfield, California (Location Map, Exhibit 1). The excavation extended onto the adjacent property located to the north of the Leo Black Electric site known as the Read Parcel. .._._~-.-~.~A 500. gallon .underground tank,__which..had contained gasoline,.was ~removed from the. northeast area of the Leo Black Electric site in February, 1987. Gasoline contamination was identified in the soils beneath the tank and a site characterization was conducted in July 1987 (WZI, 1987) to determine the extent of subsurface contamination. In Jul'y 1990, a Work Plan was submitted to the Kern County Environmental Health Services Department which outlined a program for the excavation and remediation of the gasoline contaminated soils at the site. On-site health and safety procedures were also outlined in the 1990 Work Plan. Excavation of contaminated soils was conducted in January, 1991 on the Leo Black property. Additional excavation was conducted between July 26 and August 6, 1993 on both the Leo Black property and the Read Parcel located immediately to the. north. The purpose of this report is to summarize the excavation and on-site remediation activities conducted to date. II. SUMMARY AND CONCLUSIONS As documented in the previous Site Characterization (WZl, 1987), soils contaminated with gasoline from a 500 gallon underground gasoline storage tank were present in the northeast area of the Leo Black Electric property. Contamination was suspected of extending onto the Read Parcel located immediately adjacent to the Leo Black site to the north. 02060010.011 Page I Analysis of 15 confirmation samples collected from around the base of the excavation and along the north side on the Read Parcel verified that all the gasoline contamination caused by the former underground fuel tank has been removed. Diesel contamination identified in two intermediate samples from 34 feet) was noted by BC Laboratories as:~nb~t~itng~¢l~a~a~enSt~c'ofd~esel probably consisted of other hydrocarbon compounds that would volatilize in the diesel Gasoline, diesel and xylene contamination were identified in the ground water sample collected from a depth of 45 feet. The diesel.contamination was noted asm~ot~b'eing : ..... ;,~.'charactenst~c~of:d~ese/byB .G~E~iSor.~[or~es, similar to the diesel contamination identified .,,', in, sample LB-7.- Neighboring sources of confirmed ground water contamination are '{ probably the sources of the contamination. 1 . .- . -The excavation was completely backfilled on the Read Parcel and partially backfilled on the Leo Black property as approved by the County. Compaction of the backfill soils _.i as tested by M&T Agra, Inc. and all compaction tests exceeded the required 85%. J III. RECOMMENDATIONS The contaminated soils presently stockpiled on-site should be remediated according to the Site Remediation Workplan Revised Technical Approach prepared by WZI in July 1990. The remaining excavation on the Leo Black property should be backfilled with suitable soil and the case should be closed without requiring additional ground water monitoring at the site due to the regional nature of the ground water contamination in the area. 02060010.011 Page 2 IV. GEOLOGY AND HYDROLOGY During the excavations, fine to coarse sand was encountered which are similar to those described to a depth of 15 feet in the Site Characterization performed by WZI in July, 1987. A coarse grained, cobbly sandstone was encountered during the excavation from a depth of approximately 35 feet to the maximum depth of approximately 45 feet. Ground water was encountered at adepth of approximately 15 feet in boreholes drilled at the site in JulY of 1987. During the excavation of July-August 1993, ground water was reached at a depth of approximately 45 feet. The drop in ground water levels is compatible with the regional drop in the same time period due to drought conditions. V. FIELD METHODOLOGY Excavation Proqram Excavation of the gasoline contaminated soil was completed using an FMC Link Belt 3400 excavator and a John Deer 644 loader. The excavation was backfilled with a Caterpillar D6 bulldozer and the John Deer 644 loader. A 4200 gallon water truck was used to add moisture to the soils during backfill. Approximately 2700 cubic yards of soil was excavated from the Leo Black property and_ _ stockpiled on-site during January, 1991. Approximately 660 cubic yards of this soil was segregated as contaminated. The aerial extent of the January 1991 excavation and the locations of the stockpiled soils are summarized on Exhibit 2. Additional excavation of gasoline contaminated soils was conducted between July 26 and August 6, 1993 on both the Leo Black property and the Read Parcel located immediately adjacent to the north. The maximum aerial extent of the excavation to the north of the Leo Black site onto the Read Parcel was 30 feet. The excavation reached a maximum depth of 45 feet where ground water was encountered. 02060010.011 Page 3 After the analytical results determined that all contamination had been removed, the -1 excavation was backfilled with uncontaminated soils which were stockpiled on-site. Compaction of the backfill soils was certified by M&T Agra Incorporated. All t- compaction tests exceeded the required 85%. The. results of the compaction tests are summarized in Appendix I. Soil Samplin,q Pro.qram ~- Soil samples were collected for chemical analysis in brass tubes, each 2 1/2 inches in diameter and 6 inches long. The sample tubes were labeled and the ends covered with ...... . ....aluminum foil, cappedwith plastic :and secured with plastic tape. Samples were stored ~on' ice pending .delivery with Chain of Custody documents (Appendix !1) to BC -.-Laboratories in Bakersfield, California, a California Department of Health Services (DOHS) certified laboratory. · .Sampling during the on-site investigation, was conducted at several times: j · On July 26, 1993, a total of four soil samples were collected from the contaminated soil which had been stockpiled during the January, I 1991 excavation; to determine if the material was suitable for use as backfill. Each contained a composite of soil collected from three ........ separate locations (Exhibit 2). i · A total of 15 samples were collected from the excavation between July 28 and July 30, 1993 to confirm that gasoline contamination had been removed. Soil samples were not collected from the bottom of ~ the excavation due to the presence of ground water. The sampling was witnessed by Dolores Gough from the Kern County Environmental Health Services Department. Sample locations are summarized on the Soil Excavation Site Plan (Exhibit 3) and the Cross Sections (Exhibit 4). 02060010.011 Page 4 · A total of 9 samples were collected from contaminated soils which were stockpiled on-site during the July 26 - August 6, 1993 excavations. Sample locations were selected utilizing a representative sampling technique which systematically selects sampling points from a sampling grid using, random numbers following U.S. Environmental Protection Agency (EPA) guidelines in · SW 846. :¥'~:.:~:~ ::~_--' ..... ~ -~ . ~ .... ~ ..... - : ...._. .. -.-r-_ _.~- .... · ~_..-- · ....... ...........:__ Three intermediate soil samples were collected during the excavation (LB- 5, LB-6, LB-7)to characterize the contamination. Sample locations are summarized on the Soil Excavation Site Plan (Exhibit 3). Ground Water Samplin.q Pro.qram ~'"'A ground water sample was collected from the-bottom of the excavation in glass vials Provided by BC Laboratories. J VI. LABORATORY METHODOLOGY The soil samples and the ground water sample were delivered to BC Laboratories in Bakersfield, California for chemical analysis. BC Laboratories is a California Department of Health Services Certified laboratory. . ..... Soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-G) (EPA Method 8020). Selected samples were also analyzed for total petroleum hydrocarbons as diesel (TPH-D)(EPA Method 8020), BTEX (U.S. Environmental Protection Agency ':'" "' '(EPA) Method 8015M~8020) and soluble lead (SW60'10 or SW7000 MethOds).. The ground water sample was analyzed for total petroleum hydrocarbons as gasoline (TPH-G), total petroleum hydrocarbons as diesel (TPH-D) and BTEX. 02060010.011 Page 5 VII. ANALYTICAL RESULTS Results of the laboratory analysis of the confirmation soil samples from the excavation collected between July 26 and August 6, 1993 are presented in Appendix III and summarized in Exhibit 5. Results of the ground water sample collected on July 29, 1993 are presented in Appendix IV and also summarized in Exhibit 5. Results of the characterization samples collected from the 1991 and 1993 stockpiled soils are ..... p~esented in Appendixlll and summarized in Exhibit 5 .... :':_- ...... .. Stockpiled Soil Characterization - 1991 Excavation "N°c°ntaminati°n was detected in any of the four confirmation samples (LB-11 LB-2, LB- 3, LB-4).collected from the 1991 stockpile to determine the suitability of this soil as backfill material. Leo Black Property and Read Parcel No contamination was identified in the fifteen confirmation samples, verifying that all the gasoline contamination had been removed. Stockpiled Contaminated Soil- 1993 Excavation Gasoline and diesel contamination were detected in two of the intermediate samples (LB-6, LB-7) collected during the excavation. Contamination identified as diesel in sample LB-7 was noted by BC Laboratories as not being truly characteristic of diesel and possibly consisted of other hydrocarbon compounds that would volatilize in the diesel range. No contamination was detected in any of the nine samples collected from the contaminated soils which were stockpiled on-site during the July 26 - August 6, 1993 excavation. 02060010.011 Page 6 Ground Water Samplin,q Both gasoline and diesel as well as a minor amount of xylene, were reported in the ] ground water sample collected from a depth of approximately 45 feet. The contamination identified as diesel was also noted as not being truly characteristic of diesel, similar .to the diesel contamination identified in soil sample LB-7. '-~;~';~'¥:'¥':;-'i Ndmerous'sources of hydrocarbon.contamination.have be.e~, identified on ~urmunding .. sites (Exhibit 6) which have probably affected the shallow ground water in the area. !Diesel-type contamination identified in soil samples LB-6 (32 feet) and LB-7 (34_feet) is "'". . probably from the contaminated ground water as water levels at the site have been as :" -.'"~ shallow as 15 feet in 1987 (WZI;' 1987). In addition, there is no historical evidence for · . '-'. the on-site storage or use of any fuel other than gasoline. 02060010.011 Page 7 . EXHIBIT 5 '.- "- LEO BLACK ELECTRIC LABORATORY ANALYSES SUMMARY EXCAVATION SAMPLES COLLECTED 7/26/93 THROUGH 816193 Sam pie Number: LB-1 LB-2 LB-3 LB-4 LB-5 LB-6 LB-7 LB-8 LB-9 LB-10 LB-11 LB-12 LB-I 3 LB-14 LB-15 I.B-16 LB-17 Sample Type: Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil $oR Depth: 1 ft. 1 fL , ft. , ft. 30 ft. ~'~ ~"'~ --_3(~-ff~'-'~40 ft.' ~ ft~ ~"~'~ft~ 40 ft. 40 fL 40 ft. 40 ff.' 40 ft. 25 25 TPH Gas mg/kg. ND ND ND ND ND ~14,00i .~:430;00 ND NDe,/ ND ND ND ND ND ND ND ND TPH Diesel rog/kg ND ND ND ND ND i100.00 :680~00 -- --~ -- ~ ....... Benzene rog/kg ND ND ND ND ND ND ND ............. Toluene rog/kg ND ND ND ND ND ND ND .......... Ethyl~snzene rog/kg ND ND ND ND ND ND ND ........... Xylenes rog/kg ND ND ND ND ND ND ND ........... Lead mg/liter ....................... Sample Number: LB-t 8 LB-19 LB-20 LB-21 LB-22 LB;23 LB-24 LB-25 LB-26 LB-27 LB-2S LB-20 LB-30 LB-31 iii!iiiii?!ii!iiiiiiiiiiii LB-W-l, TPH Gas mg/kg ND ND ND ND ND ND ND ND ND ND ND ND ND ND !::iiiii!::ii!iii!ii!ii? 7100 u SAN JOAQUIN TEXACO REFINERY REFINERY I LEO BLACK ELECTRIC ~0~ PIERCE ROAD, BAKERSFIELD, CA. Brlttan Rd. POWER MACHINERY GulfS[ 3818 PIERCE RD. , Guff St. Gerry SL 3505 1/2 GULF ST. .ddian Ave. Turcon Ave. Orin Wy. ASSURED TRANSPORT UNION CARBIDE ~ 3228 GIBSON RD. ~ 3505 PIERCE RD. WZl INC. LEO BLACK ELECTRIC Feet 2000' 9o PIERCE ROAD, BAKERSFIELD, CA. Miles Y, mi. . OFFSITE NEAR BY SOURCES OF K il ometer s .50km GROUNDWATER CONTAMINATION II I I I I I I ! III II I I I I III I @ @ '.@ i DEPTH45 o. .iAi -20' -30' -40' -40' -30' -~; -10' EL£CTRICAL BOX ' . ~' AE~T~ PILE (~er~) . ~ CL~ SAMPLE LOCATION ST~XmL~ ...... LEO B~CK E~CTRIC. 3SS SECTION LOCATIONS ~' : ~ ~" ' '' ' "SOIL EXCAVATION,S~E;~ LIMIT OF I EXCAVATION READ PARCEL GAlE LEO BLACK PROPERTY · ~-* ---= -. :-'.':.. _ : .... ~.-.-,--...-, ,~-.:-- .:,., ..... -:~==:-.--~:.- . . .... =-.- ~...- .;..--..,.~.-?-.. m-:. :r,.:..: ;_:_.:._..,.: ::.;.._ (~) AERATION PILE ~ · (Covered) 1000 cu. yd. ~' I LIMIT OF REMAINING DEPRESSION (Max. Depth = 10 feet) {~ .. SHED BUILDING JuNK I JUNK JUtIK Q S Ai IA. C . SCALE IN FEET I II I III I I I III II I Al East r i:ENCE PIERCE ROAD IMATE ;ATION . ..":" i ." "' ." ° '" ~ , SAMPLE LOCATION 'i!;!'! ~'~:i~}'~!f!;: :~ :":' !' 1 P SAMPLE LOCATIONPR~E, ~D , [':';' "' ~:] SANDSTONE South' ~, I~:.'~'; ;:.~.I' .. '..~ := .,? .{~ ~.:~, ~: :.~, ,,.. ~ ~BBLEY SANDSTONE ~ ,'.~; ~.~ ?~,,.:.~ :. .. :~, [ :. :, .. ;~[.:::,' . .. ?'.~. . . SC~E IN . .'?"::~ . . ;, :'~.~...' .. BAKERSFIELD, CALIFORNIA", ' " LEO B~cK ELECTRIC' ';'~'. ' ~ PIERCE RO~, B~ERSRE~, ~: CROSS SE~T~S :~,i; ~,~ ,.:~ :,~ ... ,-,, l~; ',,~ ~[~,,.[,~ ....... ~1~ I I I I I III II I II I II II A West I ' 10'-- WATER LEVEl. 1 ] North PROPERTY LINE I READ PARCEL ~J~ LEO BLACK PROPERT~ APPROXIMATE I \ OTANK LOCATION o'- ................. GROUI~ID ''-' '.~ 7~87~1~- _ ........ .-..-. ,-, 3o'- . - . '.". · GROUND ''~ _' 40'-- WATER LEVEL '; ~" .~ :' ~ k~oj' '.~ .' 8193 '~' ' 50'-- ' '' '~ "~ ' ~' ' Pierce Road Limits of Backfill · Existing Depression '~ '~ \ ~ ' ~ i ~1 I II II I I I II ~k Fence ~~// * '~ '~,. 3901 Pierce Road ~ ~ · ': I Inch = 20 Feet -,' LEGEND ,. f ?'; .,,:i ~'. ~ ~ ,' ~?~ ~ .',: =~ ~, I~imtes BoRom Dep~ (Bacffil) ~ ~ ,,. .:,:~ · ::--_-:.. - .... ~. ::~.F::= · .... '"'~ .'I; ' .., ....... .- ~ ................ -- ~,~..~ ~ ,..:....~=-_-..:.... ;-. ; SITE SKETCH : .... ': ''~'? "~':" ,.: 3001 ~i~re~ ~oad, Bakersfield M&T AGRA,' Inc2 ~te~ni~l and Enw~nmenta/~S~.,~" ,:. :.,.~.'.: ~. ~ ''. , ~ . 2: I SLOPE FLOOR SLOPE ~ 1 -6' -10' -~2' -14' !.S: 1 SLOPE 1.5:: 1 SLOPE ELECTRICAL BOX TOP OP CUT LB-1 SCALE IN FEET ~-*' Ileardsley I' ' Prim.fy Sch ~ / . Beards)ey o ~,* ......... * SITE LOCATION / h / . .. ,0~ o o .:1~'.' · ~ ~ ... g ~, .. :. /.~" . . // "" _.. . /I '~ . ~: , i/ ~ '~ ,, ,, ~ . WZI INC.' T29S / R27E BAKERSFIELD, CALIFORNIA LEO B~CK E~CTRIC ~90 PIERCE ROAD, BAKERS~ELD, CA. 0 2oeo' ~oo' LOCATION UAP . SCALE IN FEET DATE 02~.~ 0A 1 Table I Summary of In-Place Soil Field Density Tests and Compaction Determinations for 3901 Pierce Road Bakersfield, California Prepared for the Leo Black Estate Field Density Test Method - Nuclear - ASTM D2922-81 Field Moisture Test Method - Nuclear - ASTM D3017-78 Field Density Test Method - Sand Volume -ASTM D1556-90 Laboratory Moisture-Density Relationship - ASTM D1557-78 * Required Relative Compaction - 85% Notes: Test Performed in accordance with the Sand Volume Method TABLE H Maximum Laboratory Density The maximum dry density and optimUm moisture content of Selected representative soil types utilized in the compaction fill were determined in the laboratory in accordance with ASTM Soil Compaction Method D1557-78. 'The optimum moisture contents are in percent dry weight, and the maximum dry densities are in pounds per cubic foot. The double-letter soil classifications that follow the Soil Descriptions are in accordance with the Uniform Soil Classification System (ASTM Designation D2487-69). The results of the laboratory compaction tests are as follows: Soil Description Maximum Optimum and Classification Dry Moisture Density Content (pc0 (%) Brown fine to medium SAND with accessory SILT (sp) 109.3 5.1 Brown fine to medium SAND with accessory SILT and 119.7 5.5 GRAVEL (sp) Brown fine to medium SAND with accessory SILT (sp) 116.4 6.3' Post Office Box J7 ~ Bakersfield, Calill~nia 93389-9217 CHAIN OF CUSTODY DOCUMENT ~mple Type: (che'ck one) ~ Drinking Water ~ SurfaceWater ~,WasteWater OII ~ Sludge. ~ Other (specify) S~mple N~ ~ollected Collector's Name Type of Analysis ;ample Relinquished by: Time: O~t~.: Sample Received by: . Tim~.: D~te: ~,mple Received in L,b by: __ ~. ~ Time: ~'~ Sample Condi,ion When Rece~y Lab: 'G/~ Tim~: Post Office BO~)217 : Bakersfield, Calitornia , 93389-9217 CHAIN OF CUSTODY DOCUMENT Job Number: ~..2C~. ~o f o WZi Inc. ;ample Type: (check one) ~ Drinking Water SurfaceWater ~,WasteWater ~ OII oil __ Sludge. __ Other (specify) Sample Number Date Collected Collector's Name Type of Analysis Sample Relinquished by: Time: Date: Sample Received by: Time: Dale' Sample Condition When Received~/y'Lab: Time; Date:_ / t Lab Signature: Time: Date; , Post Office =JCa~217 Bakersfield, ornia 93389-9217 CHAIN OF CUSTODY DOCUMENT Job Number: ,/~ ~)L"'~. r~/J / ~ WZI inc. ~ample Type: (check one) ~ DHnklng Water ~ SurfaceWater WasteWater OI! ~Soll ~ Sludge. Other (specify) Sample Number D~te Collected Collector's Name Type of Analysis ~-~ ,, ,,,, z~-/~ I Zg_~/. ,,, A~-l~ ,., I_~1~ . . ~-_ ,. . .... . ~ Sample Relinquished by: Time: Date; Sample Received by: Tim~: Date: Sample Relinquished to ~bby: ~~~ ~/~.r~ Time: Sample Received in Lab by: ~~ ~0~ ,_~~ Tim,: Sample Condition When Received By Lab: ~ ~ ~ · Time; , Post ~)ffice BOO17 ' Bakersfield, California , 93389'9217 CHAIN OF CUSTODY DOCUMENT " Job Number: O,,20¢. ~,of¢) WZI Inc. ;ample Type: (c,heck one) -- Drinking Water , SurfaceWater -WasteWater __ OII.. __ Soil "Sample Number Date Collected Collector's Name Type of Analysis 3ample Relinquished by: Time: Date; Sample Received by: Time: sample Received in Lab by: Time: '~.,' Sample Condition When Received By Lab: ~ ~ Time: ~ ,,,L~(.,~ De. te,'~/~ ~b Signature: Time: ~.'C~ RePort To: : ~, : Analysis Requested Phone: . ~.. : ,. .~ Lal~t Sample DeScdption: Date & lime Sampled: :~ Comment: Billing Inf~>::.!': Relinqui,shed by: (>Signature).,...~,. :.~.-'.., ...~ ~"~'bl: (Sig nature) / Date:Time: ' I Date: Time: : Relinquished bY:"(S,~gnat~ I~, ~l/.~)y.'f'(S~naturt .~_ ' '" ~'/(/ J~ [' Address :' ' ' ' ' · ' -- ' )~' ¢~ S )'" City State i Relinquished by: (Signature) Received by: (Signature) Date: Time: Attention: Relinquished blt: {Signature) Received b~: {Signature} Date: Time: < Miles: "~' Relinquished blt: {Signature) ReceiYed by: {Signature) Date: Time: Sa~nple Disposal P.O.# ,- ~ Reiinqui~hed b~t: (Signature) Received blt: {Signature) ' Date: Tim~: D Return to client Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT~ ':' Report: - 08/19/93 P.O. BOX 121 . Lab %: 93-07981-8 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB $0206.0010 LB-29, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ® Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis .Reporting Reporting Constituents Results 'Units Level Total Petroleum' Hydrocarbons (gas) None'Detected mg/kg 1. Depart~nt ~upervisor O cc: WZI - ALLEN WAGGONER '" Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: .. 08/19/93 .. P.O. BOX 121 Lab ~: 93-07981-9 WOFFORD HEIGHTS, CA 93285 000-0000 -Sample Description: JOB #0206.0010 LB-30, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method Modified EPA 8015 Sample Matrix: Soil .. Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 08/09/93 08/09/93 08/12/93 Analysis Reporting Reporting Constituents Results Units Level Total, Petroleum'.. Hydrocarbons (gas) None Detected · mg/kg 1. California D.O.H.S. Cert. ~1186 .... '"'"'-, . . ...~ . Depar~nt ~upez-visor 0 ' cc: WZI - ALLEN WAGGONER ..... WAX ~ 3~:::~7-1 c~18 Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/OTOM GILBERT' Report: 08/19/93 P.O. BOX 121 Lab ~: 93-07981-1 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-31, SAMPLED ON 08-09-93 BY'A.'WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method ~ Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received % Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Anaiysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. g1186 . . ". ..... Depar~'6'e~t--S~ cc: WZI - ALLEN WAGGONER 4100Aclas'~:. · BekerstSelO, CA 93~08 · ~ 327~11 · ~AX L1B0~ 3~::~7-I 91B ESTATE OF L~O BLACK Date Reported: 08/19/93 C/0TOM GILBERT ' Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-2 WOFFORD HEIGHTS, CA 93285 000-0000 .. WET TEST EXTRACT CONTAMINANTS AI~ALYZED ACCORDING TO TITL~ 22, ARTICLE 11, CALIFORNIA CODE OF REGLTLATIONS FOR HAZARDOUS WASTE DETERI~INATION (STLC) Sample Description: JOB #0206.0010 LB-23, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method . Criteria · Constituents mq/liter P.Q.L. Method STLC Lead 0.84 0.5- SW-6010 5.0 . ~ _ · Comment: All metals reported above are in~ mg/liter on a f. iltrat~, basis (_STLC! ,' .~These i''~--~' - ......... resuIts"ar&~ baSed'-on-~e'xtr'&ctin~ :s~a~pte 'acc0rdihg th?Title~ 2'2'~ ~Arti~le'-~f~'', -'-- .... ~ ...... ~- California Administrative Code usin9 a 4S-hour citric acid (deionized water - - for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the .least amount of analyte detectable . .............. based on sample size used and analytical technique_employed) ~:-..-.: : ...' STLC = Soluble Threshold Limit Concentration " '" SW = ,,Test.Methods for Evaluatin9 Solid Waste~'.phYslcal/Chemical Methods", : ..... EPA-SW-846, September, 1986. ... Department Supervet cc: WZI - ALLEN WAGGONER .' ' ." ' ESTATE OF LEO BLACK Date Reported: 08/19/93 C/0 TOM GILBERT ~' Date Received: - 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-& WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST '. EXTRACT CONTAMINANTS ANALYZED ACCORDING TO TI~E 22, ARTICLE 11, CDJ~IFORNIA CODE OF REGIILATIONS FOR HAg2%RDOUS WASTE DETERMIbIATION (STLC) : Regulatory Sample Results Method Criteria Constituents· mq/liter " P.Q.L. Method ~' STLC Lead None Detected 0.5 'SW-6010 -. 5.0 comment: Ail metals reported above are in mg/liter on a filtrate basis (STLC) . ' These ':- ' --~ results- are b~sed ~' on'- ex~ra~i~. 'sample according ~- to-~'~'T~ti~TM 2'2'i~'A~iCi~i-I'--i~'.. -~- ........ California .Administrative Code .using a &8-hour citric .acid (deionized water for hexavalent chromium) extraction. P_:.Q~.L~ = Practical Quantitation Limit (refers to the least amount:of, analyte detectable -',-:::::~"~._!:.?:. based o.n ~.sample size used and~analytical technique-emploYed). STLC . = Soluble Threshold Limit Concentration · REFERENCES: · ' ..... . · ".. ':',?:Z':i':':SW = "Test Methods for Evaluating Solid WaStes PhYSical/Chemical Methods",." """:' EPA-SW-8~6, September, 1986. " · cc:. WZI - ALLEN WAGGONER '. '""::?:/i" ' ' ' " ",'." :':.' - 4100~;las Or;. · Bakersfield. CA ~ · L~J0~ 3~:::~-4~11 . ESTATE OF LEO BLACK Date Reported: 08/19/93 -C/O TOM GILBERT Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-6 WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTRACT CONTAMINANTS Ai~/tLYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Sample Description: JOB %0206.0010 LB-27, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Constltuent s .... mq/liter P.Q.L. Method STLC Lead 1.5 0.5 SW-6010 5.0 Comment: Ail metals reported above are in mg/liter on a filtrate basis (STLC).- -These..-. - .......... 1 .... ';-results"ar~'based~ on-extracting"~sample"accordin~vt°~Ti~Ie'22;'~Arti'c~e~l, == ~=~' California Administrative Code using a 48-hour citric acid (deionized_.water for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers 'to the least amount .of analyte detectable ............ based on sample 'size used and analyticaI technique employed). -.... .~ STLC" = Soluble Threshold Limit Concentration REFERENCES: · 'SW = "Test Methods for Evaluating Solid Wastes' physical/Chemi&a'l MethodZ";' ~""' EPA-SW-846, September, 1986. cc: WZI - ALLEN WAGGONER .' 41 O0 ~:las O~. · Bakersfield. C~ '~OIB · LIB(i~ 3~7~I 1 · I:~X (BI2~ :~::r7-1 ~11B ESTATE OF LEO BLACK Date Reported: 08/19/93 C/O TOM GILBERT 'Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-7 WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTRACT CONTAMINANTS ANALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFOP~NIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Sample Description: JOB ~0206.0010 LB-28, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Constituents mq/liter P.Q.L. Method STLC Lead None Detected 0.5 SW-6010 5.0 Comment: All metals reported above are in mg/liter on a filtrate basis (STLC). These .... ' "¥- ~:resul~s' arB."b~s~"on '~Xtfacting sample' '~cc6rd£hg-:~t'0~'-Ti:tl~¥22;~-.~Al%~cle?ll~!-~'~'~ California Administrative Code using a 48-hour citric acid (deionized water for hexa~alent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte detectable . based on .sample size used.and.analytical technique employed).' .... ..: ....... : : STLC = Soluble Threshold Limit Concentration REFERENCES: ,., ..... SW = "Test Methods for Evaluating Solid Wastes PhYsical/Chemical Methods", EPA-SW-8~6, September~ 1986. .. Depar'~en~ Supervi ~9~ cc: WZI - ALLEN WAGGONER 41 OD Atlas Or,. · ~ekers'field, r_,A ~KB(1)~ · ~ ~-cr7-4~11 · F,~X ~ :~7'-1 ~I 8 ESTATE OF LEO BLACK Date Reported: 08/19/93 C/O TOM GILBERT' Date Received: 08/09/93 P..O. BOX 121 Laboratory No.: 93-07981-9 'WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTRACT CONTAI~INANTS AI~ALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGIILATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) [~...~! Sample Description: JOB ~0206.0010 LB-30, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria --' COnstituents ... .. mq/liter P.Q.L..--:. Method ....... STLC"" Lead . 3.3 0.5 SW- 6010 5.0 Comment: All metals reported above are in-mg/liter on a filtrate-basis (STLC). These - . ..... '-~-~-~ '- ~---' ~'~ re SU t t~' -are -bas e d- on~ extracti n9- ~s~mp 1 ~'~' 'acC°~di n9'-tO-'T i ~ 1~ h 2, .: Art i-c t e -- i ~ ~ ~:--~'-~ :.:~!i~:~ california Administrative Code using.a 48-hour citric acid (deionized water._. for hexavalent chromium) extraction. P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte detectable ...... based on sample size used and analytical technique employed). .. 'sTLc'".'= Soluble Threshold Limit Concentration ....... REFERENCES: "SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods", EPA-SW-846, September, 1986. Department Superviso~ cc: WZI - ALLEN WAGGONER. . >'. ESTATE OF LEO BI~%CK Date Reported: 08/19/93 C/O TOM GILBERT Date Received: 08/09/93 P.O. BOX 121 Laboratory No.: 93-07981-1 WOFFORD HEIGHTS, CA 93285 O00-00O0 WET TEST EXTRACT CONTAMINANTS AI%IALYZED ACCORDING TO TITLE 22, ARTICLE CALIFORNIA CODE OF REGULATIONS FOR HAY~ARDOUS WASTE DETERMINATION (STLC) Sample Description: JOB #0206.0010 LB-31, SAMPLED ON 08-09-93 BY A. 'WAGGONER. Regulatory Sample Results Method 'Criteria Constituents mq/liter P.Q.L. Method STLC Lead 0.69 0.5 SW-6010 5.0 Cogent: Ail metals reported-~ove are in mg/liter on a filtrate basis (STLC). These : ......results .ar? based0~ ex~rac~ing s~p!~ accor~ing to Title .22, ~ticle=~!l~,.~ .............. ' .......... Ca~ifo~-A~inistrktive COde'using-a for hexavalent chromic) extraction P.Q.L. = Practical Qu~ti~ation Limit (refers to the least ~o~t of ~alyte detect~le based on s~ple size used ~d ~alytical techni~e employed). S~C = Sol~le ~reshold Limit Concentration ..... '~FE~NCES: SW = "Test Methods for Evaluating Solid Wastes P~sical/~emical Methods", EPA-SW-846, Septe~er,' 1986. ."~ " or cc: WZI - ~LEN WAGGO~R Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab ~: 93-07347-1 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LE° BLACK PROJECT ~0206.0010 LB-1 SOIL IN BRASS TUBE, SAMPLED ON 07-26-93 ~ 3:00PM BY ALLEN WAGGONER. TEST M~THOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date'Sample Date Analysis Collected: Received % Lab: Completed: 07/26/93 07/26/93 07/28/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Benzene None Detected mg/kg 0.005 Toluene ........... None Detected mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes. None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. Total Petroleum ~ Hydrocarbons (diesel) None Detected mg/kg 10. California D.O.H.S. Cert. ~1186 Department Sdpervisor. cc: WZI - AT.?.EN WAGGONER 4100 A~Ies OC. · ~ekersfielcl. ~ ~ · ~ ~=~'7-4~ll I · I=AX (1905)~=)'7-1 ~11~ Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 'Lab ~: 93-07347-2 WOFFORD HEIGHTS, CA 93285 00'0-0000 Sample Description: LEO BLACK PROJECT ~0206.0010 LB-2 SOIL IN BRASS TUBE, sAMPLED ON 07-26-93 % 3:00PM BY ALLEN WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample.Matrix: Soil Date Sample Date Sampl.e Date Analysis Collected: Received 07/26/93 07/26/93 07/28/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Benzene .......... None Detected mg/kg 0'005 Toluene None Detected mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) ~ None Detected mg/kg . 1. Total Petroleum Hydrocarbons (diesel) None Detected mg/kg 10. California D.O.H.S. Cert. ~1186 Department Supervisor cc: WZI - ALLEN WAGGON~R Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab %: 93-07347-3 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LEO BLACK PROJECT ~0206.0010 LB-3 SOIL IN BRASS TUBE, SAMPLED ON 07-26-93 ~ 3:00PM BY ALLEN WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method-5030/80201. Sample. Matrix: S0il Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/26/93 07/26/93 07/28/93 Minimum Analysis Reporting Reporting Constituents ........ Results .......... Units "~ Level Benzene ........ None Detected mg/kg 0.005 Toluene None Detected mg/kg 0.00S Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) ~ None Detected mg/kg 1. Total Petroleum Hydrocarbons (diesel) None Detected mg/kg 10. California D.O.H.S. Cert..~1186 Department Supervisor cc: WZI ALLEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab ~: 93-07347-4 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: LEO BLACK PROJECT ~0206~0010 LB-4 SOIL IN BRASS TUBE, SD_MPLED ON 07-26-93 ~ 3:00PM BY ALLEN WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date S~mple Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/26/93 07/26/93 07./28/93 Minimum Analysis Reporting Reporting Constituents - Results '- Units -. Level Benzene ........ None Detected 'mg/kg 0.005 Toluene None Detected. mg/kg 0.005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) ! None Detected mg/kg 1. Total Petrole~n Hydrocarbons_ _ (diesel) None Detected mg/kg 10. California D.O.H.S. Cert. Department Supervisor cc: WZI - ALLEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/OTOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-1 '" WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-5 (SOIL), SAMPLED ON 07-28-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date sample. : ':'--- Date Sample Date AnalYsis Collected: Received % Lab: Completed: 07/28/93 07/29/93 07-30-93 Minimum Analys i s Report lng Reporting Constituents Results Units Level Benzene None Detected mg/kg 0. 005 Toluene None Detected mg/kg 0. 005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. Total Petroleum Hydrocarbons (diesel) None Detected mg/kg 10. "': - - - ~:~-- .:;~_ !.~_ _-__'¢:_7, ;._ '~ -r~-,.~¢-..~ ~- -_-.-L :'.:-7. w='7-:-=.'.:¢--~_ ~-j-:--' ' =:_ :Z&~ =~-.~ .t~ ='_'.- _.:._~_~- 5: ':~- :%_'~:--? 3-,.~:~ ' - ~-- ?:'-.~7 4-~--- ~_<_L- -. ~ ;_.--_'_Z~ _'z_ ~-3---- ~ 2:./H:_~- :,~:¢?~_' fL,: --=:5: Z-_~ ::-'~V--:- 5-~J~ ~ i. California D.0.H.S. Cert. ~1186 Department Supervisor Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-2 WOFFORD HEIGHTS, CA 93285 000o0000 Sample Description: JOB ~0206.0010 LB~6 '(SOIL), SAMPLED ON 07~28-93 BY A. WAGGONER. TEST METHOD:..' TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received @ Lab: Completed:' 07/28/93 07/29/93 07 -31-93 Minimum Analysis Reporting Reporting Con s t i tuent s Re sul t s Unit s Leve 1 Benzene None Detected mg/kg ..~.. 0. 005 Toluene None Detected mg/kg ' 0. 005 Ethyl Benzene None Detected mg/kg 0.005 Total Xylenes None Detected mg/kg 0.01 Total Petroleum Hydrocarbons (gas) 14. mg/kg 1. Total Petroleum Hydrocarbons (diesel) 100. mg/kg - ' 10. Department Supervisor 4100ArJas Cc. · Bakersfield. ~ ~ · (E)(D~ 3L:r;-4@1 1 · FAX [812b-) 3L:r;-1 91 8 Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-3 WOFFORD HEIGHTS, CA 93285 000-000O Sample Description: JOB %0206.0010 LB-7 (SOIL), SAMPLED ON 07-28-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method '- Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/28/93 07/29/93 / 07-30-93 Minimum Analysis Reporting Reporting Constituents.. . Results Units Level Benzene None Detected mg/kg .-.0.04 Toluene None Detected ms/kg 0.04 Ethyl Benzene None Detected ms/kg 0~04~ Total Xylenes None Detected mg/kg 0.09 Total Petroleum Hydrocarbons (gas) 430. mg/kg 9. Total Petroleum Hydrocarbons (diesel) 680. ms/kg ''i.""' 100.' Not'ei High reported PQL' s due to high hydrocarbon background2" Department ~upervisor cc: WZI "~' BTXE Analysis · ESTATE OF LEO BLACK Date of C/OTOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-1 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-8 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST ~OD: TP~ by D.O.~.S. / L.U.F.T. ~ual Method - Modified EPA Sample Matrix: Soil ' Date Sample ... Date samPle ~... -Date Analysis ... Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis' Reporting Reporting i Constituents Results Units Level Total Petroleum · Hydrocarbons (gas) None Detected · mg/kg 1. California D.O.H.S. Cer~. ~1186 .... Department Supervisor cc: WZI - ALLEN WAGGONER ," 4100Atlas Oc. · Bakersfield, C.,A ~ · [~C)O--) ::~:~-.4~1 I · I=AX ~ ~::=7-1 c~1 8 BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-2 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-9 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST HETHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil "-~i-'~-~S~mPle "~:.~';' ' ..... '~"~'D'at~ sample-~ .... i~_~ ....i..- .... 'Date Analysis..i ....................... Collected: Received ~ Lab: Completed:.. 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum . Hydrocarbons (gas) None Detected mg/kg "- .. 1.. California D.O.H.S. Cert. ~1186 Department Supervisor cc: WZI - ALLEN WAC-GONER 4100A-.3as OC. · ElakersfietcI. C~ ~ · ~ 3~7-491 I · FAX (E)(2b~ ::~c~-1 ~1E~ BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 0.7/30/93 P.O.-BOX 121 Lab ~: 93-07560-3 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-10 (SOIL) 07-29-93 SD/~PLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample '. -- Date Sample '" Date Analysis Collected: Received ~ Lab: Completed: 07/29/93. 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected -mg/kg 1. California D.O.H.S. Cert. ~1186 Department Supervisor cc: . WZI - ALLEN WAGGONER 4100A~as C-'k;. · Beker~-fielcI, CA ~ · ~ ~:::~'-,4~1 I · I=AX (1~0o--) ~:::~7-1 ~1B BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-4 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-11 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.~. Manual' Method - Modified EPA 8015 Sample Matrix: Soil Da~e 'Sample --- Date S~ple Date 'Analysis Collected: Received ® Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 Department Supervisor cc: WZI - ALLEN WAGGONER ~1C[~ ArJas C1:. · l=laker~fielcl, C~ ~. [E]123~) :::B~7~91 I · I=AX ~ :::B~:rT-1 91E] BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT .Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-5 WOFFORD HEIGHTS, CA 93285 . Sample Description: JOB ~0206.0010:LB-12 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H;S.'/ L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: s0il t~-Li~,.-'~:~?~.~ .... · ....... .-.:.,:'.-..L'.7::.~:~ ..~.~:~.,..':..~.-' "' .'., ....... ~ .... '-..' ..-- .... .- .... ..", ....~ ...,~.... · .... ..- ...... Date Sample ... "'-~--~--'~'e--~'~'~ ..... ' ............ - ............ :~t~'"~nalysis'' "-"¥' Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting RepOrting Constituents Results Units Level Total Petroleum . Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 Department Supervisor .. cc: WZI - ALLEN WAGGONER BTXE Analysis ESTATE OF LEO BLACK Date of C/0 TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-6 WOFFORD HEIGHTS,'CA 93285 Sample Description: JOB %0206.0010:LB-13 (SOIL) 07-29-93 sAMPLED BY A. WAC=GONER TEST METHOD: TPH by D.O.H.S. ~.~.L.U.F.T. Manual Method - Modified EPA 8015 SamP%e Matrix: Soil' Date samPie Date Sample ..... Date Analysis Collected: ReCeived ~ Lab: Completed:' 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum .... . Hydrocarbons (gas) 'None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 DeparTment Supervisor · ..CC:- WZI - ALLEN WAGGONER BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-7 WOFFORD HEIGHTS, CA 93285 Sample Description JOB ~0206.0010:LB-14 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER )~ii· TEST METHOD: TPH by D.O.H.S' / L.U.F.T..Manual Method - Modified EPA 8015 Sample Matrix: Soil Date sample'.. , Date Sample Date'Analysis Collected: Received ~ Lab: Completed: 07/29/93 ... 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Cons t i tuent s Re su 1 t s Unit s Leve 1 Total Petroleum Hydrocarbons .(gas) None Detected mg/kg 1. Department Supervisor 41 O0 A~as Oc. · EBekerstSelrl. C~k ~ · ~ ~B~:mT~,~l 1 · I=~X [8Ob-)~::::~7-1 ~1 8 BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O.' BOX 121 Lab ~: 93-07560-8 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-15 '(SOIL) 07-29-93 S~LED BY A. WAGGONER TEST ~T~OD: TPH by D.O.H.S. / L.U.F.T. F~%nual Method - Modified EPA 8015 sample Matrix: Soil Date'Sample Date Sample Date Analysis Collected: Received ® Lab: Completed: 07~9~93 07/29/93 07/29/93 Minimum .'.. Analysis Reporting Reporting Constituents Results Units Level Tot~l~Petroleum ..... Hydrocarbons (gas) None Detected mt/kg 1. California D.O.H.S. Cert. Department Supervisor cc: ~' WZI - ALLEN WAGGOB-~R 41(2XD,a,r,~scc. · Bakersfield. ~ ~1~ · l'~05) ~4~B11 . BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT · Report: 07/30/93 P.O. BOX 121 Lab ~: 93-07560-9 WOFFORD HEIGHTS, CA 93285 ..... Sample Description: JOB ~0206.0010:LB-16 (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST M~THOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 sample Matrix: Soil Date sample ' Date· Sample Date AnalYsis Collected: Received ~ Lab: ..... Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting ..~.~.Reporting Constituents Results Units Level Total Petroleum.- Hydrocarbons (gas) None Detected mg/kg 1. Department Supervisor BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 121 Lab %: 93-07560-10 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB %0206.0010:LB-17 '(SOIL) 07-29-93 SAMPLED BY A.- WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - M~dified EPA 8015 Sample Matrix: Soil Date Sample· Date Sample Date Analysis Collected: Received ® Lab: Completed: 07/29/93 07/29/93 07/29/93 'Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected . mg/kg 1. california D.O.H.S. Cer~. ~1186 " 'i. '"-"'"i?''' -. .'~ Department Supervisor CC: WZI - ALLEN WAGGONER . .~ ". ~'.._.. .. )O~TO~ES BTXE Analysis ESTATE OF LEO BLACK' Date of C/O TOM GIL4~ERT Report: 07/30/93 P.O~ BOX 121 Lab ~: 93-07560-11 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010: LB-lB (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - F~dified EPA 8015 Sample Matrix: Soil Date Sample~ ""' Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis Reporting -Reporting Constituents Results Units Level Total PetrOleum .' '. Hydrocarbons (gas) None Detected' mg/kg ' 1. ~ .'., :":,".. ~,...'. '.::::~.::: .j California D.O.H.S. Cert. ~1186 '.. ,.i;.:..'.... --'. Department Supervlsor cc: W~-I - A.LLEN W~NER ~. Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07560-12 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-19 (SOIL) 07-29-93' SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample .¥ Date Sample. Date'~-nalysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 07/30/93' .'" Minimum Analysis Reporting. Reporting Constituents Results Units Level Total Petroleum Hydrocarbons~(gas). None Detected. mg/kg 1. Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O. TOM GILBERT Report: 08/02/93' P.O. BOX 121 Lab ~: 93-07560-13 WOFFORD HEIGHTS,.CA 93285 Sample Description: JOB ~0206.0010:LB-20 (SOIL) 07-30-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample ...... ' Date. SamPle Date Analysis Collected: Received ~ Lab: Completed: 07/30/93 07/30/93 07/30/93 Minimum 'Analysis Reporting Reporting Constituents Results Units Level Total Petroleum'..~. '.~ Hydrocarbons (gas) None Detected mg/kg 1. Department Supervisor cc: WZI - ALLEN WAGGONER ... Petroleum Hydrocarbons ESTATE OF. LEO BLACK " Date of C/O TOM GILBERT Report: 08/02/93 P.O'2' BOX 121 Lab 4: 93-07560-14 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB 40206.0010:LB-21 (SOIL)' 07-30-93 S~w~PLED BY A. WAGGONER TEST HETHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date. Sample.-: Date Sample '' Date Analysis Collected: Received ® Lab: Completed: 07/30/~3 07/30/~3 07/30/93 Minimum Analysis Reporting Reporting Constltuent s Re sult s Unit s Level Total' Petroleum .-: ' · · Hydrocarbons (gas) None 'Detected mg/kg 1. California D.O.H.S. Cert. ~1186 -' Department Supervisor WZI - ALLEN WAGGONER . ~ . . ..~.~-..: Petroleum Hydrocarbons · ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab %: 93-07560-15 WOFFORD HEIGHTS, CA 93285 -' Sample Description: JOB %0206.0010:LB-22 (SOIL) 07-30-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EpA 8015 sample Matrix: Soil Date Sample Date'Sample Date Analysis Collected: Received ~ Lab: Completed: 07/30/93 07/30/93 .. 07/30/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. %1186 Department Supervisor cc: WZI - ALLEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/OTOM GILBERT Report: 08/19/93 P.O'. BOX 121 .. 'Lab ~: 93-07981-2 WOFFORD HEIGHTS, CA. 93285 000-0000 Sample Description: JOB ~0206.0010 LB-23, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample _-. . Date Sample. - ............ Date Analysis Collected:' Received ® ~Lab: .... Completed: 08/09/93 08/09/93 08/12/93 ' ' Minimum ' :'" 'Analysis Reporting Reporting .. Constituents Results Units Level Total Petroleum .. · Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. ~1186 ''-i'', ........... Depar~nt S~ cc: WZI - A/~LEN WAGGONER ': , , t' . ~,"i , ~: · Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT '. ." Report: 08/19/93 P.Oj BOX 121 Lab ~: 93-07981-3 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: 'JOB ~0206.0010 LB-24, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample. Date Sample Date Analysis Collected: Received ~ Lab: Completed: 08/09/93 08/09/93 08/12/93 '""~':"? Minimum Analysis Reporting Reporting Constituents Results' Units Level Total Petroleum Hydrocarbons (gas)" -. None Detected' mg/kg 1. Depar~nt .~uperviso~ · ''' cc :'. WZI - J~,I.~N WAGGONER 41 (2)0 A~las C~. · Bakersfield. C.~ ~3301B · [~)0~) ~-491 1 · I=AX [1BC)b--) ~:=7-1 ~B1B Petroleum Hydrocarbons.' ESTATE OF LEO' BLACK Date'of C/O ~DM GILBERT -~ Report: 08/19/93 P.O. BOX 121 Lab ~: 93-07981-& WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-25, SAMPLED ON 08-09-93 BY A. WAGGONER. ~'~ TEST METHOD: TPH by D.O.H.S. / L.u.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Collected: Received ~ Lab: ....... Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Reporting Constituents. ~' Results Units Level Hydrocarbons (gas) ......... NoneDetected .... mg/kg 1. .California D.O.H.S. Cert. ~1186 ."~ .' Department Supervi~ Ic~ cc: WZI ALLEN WAGGONER ~,100A~tas Oc.. E~ekerst~elcI. C~k ~ · ~ ~:=7-491 I · I=AX ~ 3~7-1 ~11 ~ Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT· ~ Report: 08/19/93 ~" .. P.O.' BOX 121 Lab %: 93-07981-5 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: ' JOB ~0206.0010 LB-26, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ® Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis Reporting Reporting Constituents Results Units Level Total Petroleum ..... '.' '.' Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. '~1186 Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 08/19/93 P.O. BOX 121 Lab $: 93-07981'-7 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB $0206.0010 LB-28, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date S .amPle Date Sample Date Analysis Collected: Received ~ Lab: ' ' Completed: 08/09/93 · 08/09/93 08/12/93 : Minimum Analysis' Reporting "Reporting .... Constituents Results Units Level Total Petroleum ':-. '- ' ..... '~ Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. $1186 '::"".';' Depar~ent ~r cc:. WZI - ~?.?.EN WAGGONER '. '' '. · 47013 Stockdale Highway, Suite 120 East Herndon Avenue, Suite 203 Post Office Box 9217 Fresno, California 93720 Bakersfield, California 93389 209/261-9160 805/326-1112 805/326-0191 FAX 209/261-917.1. FAX WZl ,.c. September 15, 1993 Delores Gough Kern County Environmental Services Department 2700 "M" Street, Suite 300 Bakersfield, California 93301 Re: Leo Black Estate Excavation and Remedlation of Contaminated Soils "'''~ Dear Delores: Attached is a report summarizing the excavation of all contamination associated with the former underground tank site on the Leo Black Electric property, 3909 Pierce Road, Bakersfield, California. This includes the contamination that extended onto the Read property to the north. · The excavation of the contaminated soil was complete, as confirmed by the sampling. · All contamination on the adjacent property which was due' to Leo Black was removed as confirmed by sampling and stockpiled on Welltech's property. · Stockpiled soil from excavation in 1991, as discussed in the report, ,.-~.-.. :~ ~ . has been characterized and found to be suitable for use as backfill, _--~ -. _--. in accordance with LUFT guidelines for hydrocarbon contamihated soil. · Ground water contamination at'the base of the excavation is diesel- based and must be from off site sources. Leo Black Estate did not. store diesel in the underground tank. "" -.' The formal workplan for aeration and remediation of the remaining stockpiled soil will be conducted in accordance with the methods described in the workplan previously submitted and approved by the KEHSD in 1990. 02060010.013 Page I For the purpose of documentation of the work, approval of the following is requested: · Excavation and confirmation sampling conducted to date is completed; and, · Ground water monitoring is not required because the source of . contamination on the Leo Black property has been completely removed. Your prompt response is appreciated. Very truly yours, Susan Chandler Kiser, R.G., R.E.A. Vice President, Project Development 'SCK/er Attachments cc: Wendy Thomson, Darling, Maclin and Thomson, w/o attach Tom Gilbert, w/o attach 02060010.013 Page 2 Petroleum Hydrocarbons ESTATE OF LBO BLACK · Date of C/O TOM GILBERT Report: 08/02/93 P.O. BOX 121 Lab ~: 93-07496-4 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB ~0206.0010 LB-W-1 (WATER), SAMPLED ON 07-29-93 BY A. WAGGONER. TEST METHOD: TPH'by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Sample Matrix: Water Date Sample Date Sample Date Analysis Collected: Received ~ Lab: Completed: 07/29/93 07/29/93 Minimum Analysis Reporting Reporting Constituents Results Unit s Level Benzene None Detected ~g/L . 5. Toluene None Detected ~g/L .5. Ethyl Benzene None Detected ~g/L 5. Total Xylenes ,280. ~g/L 10. Total Petroleum Hydrocarbons (gas) , 7100. ~g/L 500. Total Petroleum Hydrocarbons (diesel) 2300. ~g/L , ' ~' "'" 200 ~.' N'ote:High reporte'~ PQL's due to high concentration--0f target analytes. " Sample chromatogram not typical of diesel. Department Supervisor CC: WZI " ...... ::"~"' ': ;"' ~':''' ' "' 4100Acles CC. · Bakersfield. C~ ~ · ~ ~]27-4911 · F=AX (80b-) ~:::rT~l ~1 8 4800 Easton Dri~ulte 114 Bakersfield, Cal~l~llla 93309 Post Office Box 9217 Bakersfield, California 93389 805/326-1112 805/326-0191 FAX LEO BLACK ESTATE SITE REMEDIATION WORKPLAN REVISED TECHNICAL APPROACH July 1990 Prepared by WZI Inc. 4800 Easton Drive, Suite 114 Bakersfield, California 93309 0206.0010A TABLE OF CONTENTS Pa.qe Phase I 1 Excavation 1 Field Determination Regarding Contamination 1 Sample Collection 2 On-Site Health and Safety 3 Soil Aeration 4 Phase II 5 Phase III 5 Analysis of Water Samples 5 References Cited 6 EXHIBITS Exhibit 1 Location Map "" Exhibit 2 Plot Plan/Monitoring Well Location APPENDICES Appendix I Summary of Laboratory Analyses Appendix II Screening Health Risk Assessment After consideration of comments received from Kern County Environmental Health Services.in a letter dated February 6, 1990 and in technical meetings on January 31 and June 5, 1990, it is proposed to deal with the contamination problem at Leo Black Estate in the following manner: i' PHASEI Contaminated soil excavation/aeration will be conducted according to Regulation 8, Organic Compounds Rule 40. EXCAVATION A California State Registered Geologist will supervise the separating and stockpiling of the Clean and contaminated soil, as well as record encountered geologic and contamination conditions as observed in the field. Field Determination Regarding Contamination The field determination regarding the presence/absence of contamination will be based on visual sample inspection for the presence of staining, odor and Organic Vapor Meter (OVM) readings. The presence of odor and staining in conjunction with positive OVM readings will be used to establish the presence of contamination in soil samples from the excavation. Determination of the absence of contamination in a soil sample will be based on absence of odor, absence of staining and OVM readings in the range of background Values. Background OVM readings will be established at the top of the excavation above the depth of five feet. Page 1 Sample Collection I" I Soil samples will be collected from the base of the excavation or side walls if the excavation is in contact with groundwater. Samples will be analyzed for BTEX and TPH utilizing EPA method 8020 and modified EPA 8015 for gasoline respectively. Soil samples will be collected from the backhoe as follows: 1. Remove approximately one inch of soil from the Immediate surface area where the sample Is to be taken. 2. Drive a thin-walled stainless steel or brass cylinder into soil. 3. No head space should be present In the cylinder once the sample is collected. 4. Cover the ends with aluminum foil and plastic caps. 5. Seal with duct tape. 6. Label the tubes with waterproof ink and cover the labels with clear plastic tape. ":;~ 7. Store the tubes In an Ice chest with dry Ice until delivery to the laboratory. ~',:~' 8. Prepare a complete sample inventory and Chain of Custody documents for the samples. 9. Deliver the samples to the laboratory with Chain of Custody documents and analyze in less than 14 days. Page 2 On-Site Health and Safety WZI Inc. personnel and all on-site contractors will comply with all of WZI's health and safety procedures. Based on the data provided by Leo Black Estate, the WZI Safety Manager and Project Geologist have designated this project as a Level D site assessment for the purposes of protective equipment and clothing. Hard hats and chemically resistent boots will be worn at all times on the site. Half-mask respirators fitted with organic vapor cartridges will be available on-site for each individual. A Site Safety Plan for field investigations which contains the names and telephone numbers of emergency response personnel, locations of nearby hospitals and fire stations will be available on-site. A discussion of potential chemical hazards will also be included in the Site Safety Plan. All field personnel will be familiarized with The Site Safety Plan. WZI personnel are trained in basic first aid and a first aid kit will be available on-site in case of an emergency. At least one on-site WZI Inc. employee will be trained in CPR. Before beginning work each morning, a Safety Meeting will be held with contractors to explain on-site safety precautions and emergency response. A written record of each meeting signed by those attending will be kept by the site manager. Air quality around the excavation will be monitored continually with an OVM. During excavation, OVM readings will be taken at the excavation/ground surface interface and at the backhoe operators chest level. If the OVM reading remains at 10 ppm for a prolonged period of time around the excavation the backhoe operator will be required to don an organic vapor respirator. A "hot zone" will be established around the excavation site to limit non-essential personnel from entering the work area. Good housekeeping will also be practiced at all times while on site. Page 3 SOIL AERATION ........ ~/~, ~ ~ The estimated volume of soil to be aerated is 416 cubic yards. The soil is to be aerated at a rate of 30 cubic yards per day for fourteen (14) days based on an estimated average degree of contamination (total volatile hydrocarbons) of 1,000 parts per million according to Resolution 8, Rule 40 guidelines. Soil awaiting aeration will be stockpiled and covered with visqueen. The average composition of the contamination is presented in Appendix I. The Screening Health Risk Assessment is presented in Appendix II. Samples representative of the contaminated soil will be collected within 24 hours of soil excavation. These samples will be composited by the laboratory such that representative samples will be analyzed for each 50 cubic yards. All sample collection and analysis procedures will be in compliance with county regulations. The uncontaminated soil removed from the top of the excavation will be returned to the excavation after the contaminated soil is removed. After aeration is complete the soil will be resampled to ver!fy the volatiles have been removed. Page 4 PHASE II Determination of groundwater gradient from adiacent wells as identified in ExhiBit 1 in accordance with County guidelines of one-half mile radius outlined in 13'1'-50. Drill and install two groundwater monitoring wells {one up gradient and one down gradient) to characterize the current water quality beneath the property, lhe drilling, sampling, installation protocols as well as the Health and Safety Plan for this site were previously described in the work plan submitted to the County on NovemBer 29, 1958, supplemented on May 10, 1989 and deemed acceptable on FeBruary 6, 1990. The approximate location of the two groundwater monitoring wells located on the Leo Black site are shown on Exhibit 2. PHASE III Analysis. of Water Samples Upon receiving the water analyses, all the available data will be integrated within one- half mile of the site, including those off-site wells used to establish the water gradient. A report will be prepared summarizing the field activities, the collection of data and analysis of any groundwater contamination found beneath the Leo Black Estate. Page 5 REFERENCES CITED U.S. Environmental Protection Agency, 1989, Estimating Air Emissions from Petroleum UST Cleanups: United States Environmental Protection Agency, Office of Underground Storage Tanks, Washington D.C., June. Wilson Zublin Inc. (WZI Inc.), 1987, Leo Black Electric Site Characterization: unpublished consulting report, prepared for the estate of Leo Black, July. Page 6 II..~ I / xB' PLAN ~ o ;.~ / ~', '" ' '" I xx,x FORMEIR LOCATION OF I [ ~ LBM-2 (None Detected) I [ LB 6 LB 3 LB 2 VOLATILE HYDrOCArBONS FEET BELOW GROUND ESTIMATED E~ENT OF ~ (ug/g) o SOIL CONTAMINATION BASED xx ~ O~ 7187 SOIk S~M~kI~G x 40C AND GRADIENT xx 3 6 91 (Non~ Detected) ~,.,'. ' SCALE IN FEET / · ~13 F~ET BELOW 0 5 ~ ~ GROUND A I LB 6 LB 3 LB 2 ~NOSU~ACE I A' LEGEND ' L__ __ J ' TOT~ V~LE HYDR~ARBONS (u~g) o 0 . 5 .................. ~ SCALE IN FEET [ <' 10 - (None Det~ed) (None Deleted) 2 0 3 5 L ~[ B~ERSFIELD, CALIFORN~ LEO BLACK ELECTRIC 'None Oet~ N WA R --: ...................................................................... L._~ ........ [~ ..... ~.~..g~ .... .~. .... .~o~ .' MONITORING ~LL LOCATIONS { DATE 6/90 IDN 2,371EXHIBIT 2. _.~/_ - ~ . ks, ' 0 ~ ' '::'TEXA REFINE Sum ~i .. I ~ ~ ,..;. o . 11/2 o · I " IRADIU o EFINI LE(~END ., P.M, POWER MACHINERY, 3818 PIERCE ROAD: CONTAMINATED SOIL D.O. DAVIES OIL CO., 3505 1/2 GULF STREET: ': FREE PRODUCT PLUME REFERENOE:, WATER ELEVATICN, · SEPT. 1987 U.C. UNION CARBIDE, 3505 PIERCE ROAD: (KCWA- I.D.#4) GROUNDWATER CONTAMINATED A.T. ASSURED TRANSPORT, 3228 GIBSON ROAD: BAKERSFIELD, CALIFORNIA GROUNDWATER ~AMINATED LEO BLACK ESTATE V.P. VALLEY PERFORATING LOCATION MAP & NEAR BY CONTAMINATION SITES 0 1000' 2000' , -- .... DATE 4/90 DN 1988 I SUMMARY OF LABORATORY ANALYSES APPENDIX I CONSTITUENT LB#1 LB#1 LB#3 PPM 10-11.5' SOIL % 13-14.5' B SOIL % 15-15.5' SOIL % AVERAGE % BENZENE 9.01 0.39 1.9 0.05 38.49 0.73 0.39 TOLUENE 19.21 0.84 25.91 0.7 48.62 0.92 0.82 ETHYL BENZENE 11.84 0.52 47.00 1.27 129.8 2.47 1.42 p-XYLENE 76.82 3.35 115.13 3.12 330.3 6.28 4.25 m-XYLENE 181.92 7.93 260.53 7.06 673.26 12.79 9.26 o-XYLENE 147.11 6.41 266.62 7.22 324.74 6.17 6.6 ISOPROPYL BENZENE ND 67.32 1.82 ND 0.61 VOLATILE HC 1847.92 80.56 2906.47 78.75 3717.99 70.64 76.65 TOTAL VOLATILE HC 2293.83 100 3690.88 100% 5263.2 100% ! 00% WZl ! INC. APPENDIX II LEO BLACK ELECTRIC SOIL AERATION SCREENING HEALTH RISK ASSESSMENT INTRODUCTION Leo Black Estate proposes to treat volatile organic compounds (VOC) contaminated soil from an underground storage tank by excavation and on-site aeration under guidelines contained in Regulation 8, Rule 40 of the South Coast Air Quality Management District (SCAQMD) (Attachment 1). This document has been adopted by the Kern County Department of Environmental Health as the recommended procedure for aeration of VOC contaminated soil. This Appendix addresses the health risk to the public from exposure to benzene emanating from the proposed remediation project. It includes a discussion of the methodology, the results, and the supporting documentation for the health risk assessment. The analysis indicates the expected quantity of benzene released during the soil remediation procedure will not significantly increase the lifetime cancer risk to the public. DESCRIPTION OF EMISSION RELEASES The remediation process will involve the transfer of contaminated soil from the subsurface to the surface of the ground where it will be treated by exposure to the atmosphere. Excavation will result in the release of VOC to the atmosphere. The initial burst of VOC emissions will be relatively high, but the emission rate will rapidly decline over time (Attachment 2). The emission rate of constituent compounds will be affected by the vapor concentration, soil type and moisture, temperature, wind speed and exposed surface area (U. S. Environmental Protection Agency (EPA) 1989). A synthetic Page 1 cover will be used to control the surface area, and therefore the rate, at which compounds are released. The VOC of concern are benzene, toluene and xylene. Their rates of release will be relative to their concentrations in the soil. Intermittent Releases The excavated soil will remain undisturbed following removal. Consequently there will be no intermittent release of benzene under normal operating conditions. Accidental Releases Accidental releases of benzene might occur from tearing of the synthetic mantel by vehicular traffic or high wind. These risks will be mitigated through the use of fences, durable materials and adequate ballast (see below). No accidental releases are anticipated. Other Release Characteristics Release characteristics are shown in the modeling results (Attachment 3). MITIGATION MEASURES Emissions will be mitigated by controlled releases of benzene contaminated soil as described in the work plan. Each day 30 cubic yards will be exposed as permitted under Regulation 8, Rule 40. The remaining contaminated soil will be covered with visqueen to prevent emissions. Page 2 Terrain Considerations The remediation site is located in Northwest Bakersfield. It is an industrial and commercial area bounded by U.S. Highway 99 on the west and Pierce Road on the east. The terrain is extremely fiat, and there are no significant changes in elevation for several miles, particularly in the direction of the prevailing winds. Within the general vicinity of the project there are service and supply company and some light industry. · The Iow level structures supporting these activities are well dispersed. Receptor Data Within a one half mile radius light commercial and industrial activities predominate, and vehicular traffic on Highway 99 and Pierce Road is intense. Most businesses hold normal hours, Monday through Friday. It is estimated that a typical business employees less than 25 persons, many of whom provide services outside the area of potential' impact. Human activity in the area is slight evenings and weekends. There is a single dwelling on Pierce Road, approximately 50 meters south of the contaminated area. The immediate vicinity is otherwise vacant. The dwelling is the nearest, and therefore, the most sensitive receptor site. Toxicity of Benzene The major toxic effect of benzene is on the blood producing organs. Chronic exposure of humans to Iow levels on benzene in the work place is associated with blood disorders including aplastic anemia and leukemia (Andrews 1986). Benzene associated leukemia has been reported in workers employed in the shoe and rubber industries, chemical plants and other industrial settings. Numerous other epidemiologic and case studies have reported an increased incidence or casual relationship between leukemia and exposure to benzene. Carcinogenicity has been demonstrated in rodent studies Page 3 and chromosomal aberrations have been observed in various tissue culture studies. (IRIS 1989). These studies have established benzene as a human carcinogen (EPA Category A). Human populations are primarily exposed to benzene through inhalation of contaminated ambient air (Andrews 1986). There is nothing in the available literature to suggest that noninhalation pathways will be significant, or that noncarcinogenic health effects will occur, at the anticipated emission levels. The area around the remediation site is zoned industrial, and it is unlikely that livestock and crop contamination from the source will occur. Toluene and Xylene Toxicity Neither toluene nor xylene have been identified as probably human carcinogens. In high doses these chemicals may cause liver injury or central nervous system depression. The EPA has established daily NOAELJLOAEL levels for toluene and xylene as 151 mg/m~ and 4750 mg/m~ respectively (EPA 1990). Emissions Of toluene and xylene are expected to be well below these levels. Consequently, no assessment of risk is necessary. Methodology Quantative estimates of carcinogenic risk from benzene exposure consisted of estimating worst case emission rates for benzene and determining off-site concentrations by modeling. These concentrations were assessed in terms of potential cancer risk from releasing the total amount of benzene at the maximum emission rate. A maximum daily allowable volume of exposed soil was determined from tables in Regulation 8, Rule 40, SCAQMD. The surface area of the exposed pile was calculated and a maximum emission rate was determined from nomograms in the EPA manual, Estimatin.q Emissions From Petroleum UST Cleanups (EPA 1989)'. Benzene emissions Page 4 were modeled using the Industrial Source Complex Short Term (ISCS'l') dispersion model (EPA, 1987). Emissions were modeled as a ground level area source using worst cast ISCST meteorological default options. Receptor sites were assumed to be directly down wind with no intervening structures. Average worst case ground level concentrations were determined at 20 meters and 50 meters (nearest residence). The excess lifetime cancer risk at each receptor site was calculated as the product of the maximum atmospheric concentration, the duration of exposure at the estimated emission rate, and the lifetime Unit Risk value divided by the daily risk (IRIS 1989). Formula for estimating risk: (Risk Factor) (Concentration) (Days Ex_~osure) 70 X 365 Calculations Modeling parameters are included in Attachment 3. The calculations are summarized as follows: Parameter Factor Basis Surface Area 1,620 ~ work plan Horizontal Dimension 40.2 ft calculation Emission Rate 1.6 lb/hr EPA document Duration (total benzene/rate) 2 days calculation Concentration @ 20 meters 30.4 E2 ug/m~ ISCST model Concentration @ 50 meters 1.24 E2 ug/m~ ISCST model Unit Risk Factor 8.3 E-6 ug/m~ IRIS Results Risk @ boundary (20 meters) 1.98 X 10.7 Risk @ resident (50 meters) 0.8 X 10" Page 5 The results of the screening assessment show that the proposed project will not pose a significant risk to the public. The results, presented above, indicate that the upper bound lifetime cancer risk to the general public at the property line is less than one in a million. The nearest residence to the project will also have an upper bound lifetime cancer risk of less than one million. This risk assumes modeled worst case concentrations of benzene at the selected receptor sites. Discussion Numerous measurements of atmospheric benzene concentrations indicate urban populations are exposed to a typical range of 2.8 to 20 ppm benzene, and the average inhalation of benzene is in the order of 182 - 1,300 mg per day. Higher concentrations occur from heavy traffic, filling stations, tobacco smoke and industrial processes. Public water supplies contain little or no benzene and although benzene has been detected in food supplies, data-is too scant to estimate exposure from these sources (Howard, 1990). The maximum estimated exposure from the remediation project is within the range of observed ambient concentrations of benzene in the urban environment. The health risk assessment was based on worst case assumptions. Actual concentrations at a specified receptor site can be expected to be well below the calculated values. Page 6 REFERENCES CITED U. S. Environmental Protection Agency (EPA) 1987. Industrial Source Complex (ISC) Dispersion Model User's Guide - Second Edition (Revised). EPA-450/4-88-002a U. S. Environmental Protection Agency (EPA) 1989. Estimating Emissions from the Petroleum UST Cleanups. Office of Underground Storage Tanks. U. S. Environmental Protection Agenc.y (EPA). April, 1990. Health Effects Assessment l~ Summary Tables. First/Second Quarter, FY 1990. Office of Solid Waste and Emergency Response. OSWER Directive OS-230. Andrews, L S. and R. Snyder, 1986. Toxic Effects of Solvents and Vapors, Pp 640- 644 in C. D. Klassen, M. O. Amdur, and J. Doull, eds., Toxicology, the Basic Sciences of Poisons, 3rd Ed., McMillan Publishing Co., Inc., New York. IRIS. Integrated Risk Information System (data base). 1989 U. S. Environmental Protection Agency, Office of Research Development. HoWard, P. H., ed. 1990. Handbook of Environmental Fate and .Exposure Data for Organic Compounds, Vol. II, p. 31, Lewis Publishers, Chelsea, Michigan. Page 7 ATTACHMENT 1 REGULATION 8 ORGANIC COMPOUNDS RULE h 0 AERATION OF CONTAMINATED SO.IL AND REMOVAL OF UNDERGROUND STORAGE TANk:S (Adopied July I~, 1~8(~) 8-~0-100 GENERAL 8-~0-101 Descrlptio~: The purpose of this .Rule is to limit the emlsslon of organic compounds from soil that has be~n contaminated by organic chemical petroleum chemical leaks or spills~ to d~scribe an acceptable ~il ~erati~n procedure; and to describe an acceptable procedure for controlling emissions from underground storage tanks intended for removal. 8-~0-110 Exemption, Stora~cPlle~ Caiculatio'nsofaeratlonvolumeunderSection 20q shall not include storage piles that.ar~ covered per Section B-~O-30); nor shall they include act)va storage pile~ 8~0-1'11 Ex=~ptlon, Excavat~ Ho)~: The expOs~Usu~f~ceof'an~xcavat~dholeshallnot be included in calculations of aera'ted volume under Section 8-q0-20~. 8~0-112 'Exemptl~,.Sampling:' Contamln~t~d ~il ~Xp~ed for thc ~le purpose of sam'piing shall notbeconside~edtobeaerated. ~emoval of ~il for sampling not qualify a pile as "ectiv¢.'~ 8-~0-113 ' Exemp~lon~ Non-volatile Hydr~a~on~ The requirem.)nts of this Rule shall apply if the ~il is contaminated by a known organic chemical or petrol=urn liquid, and that chemical or liquid has an initialboi~ing point of )02°F orhigher, provide~ that the ~il Is not hea~d, 8~0-200 DEFINITIONS 8-q0-201 Actlw St~age Pilc~ A pile Of Cbn:a~in~t~d ~)t to which ~il is currently being added or from which ~ll iS currently b~ng re.moved. Activi~ must have occurred or' be anticipated to occur within bna hour ~o b~ curren~ 8-~0-202 A=ratl~: Exposur~ of excavated contaminated ~i1 to the air. 8~0-203 Aeration Dep~: The smaller of t~e following: the actual averag~ depth of contaminated ~il; or 0.1S meters (0.S feet) multiplied by the dally frequtncy with ~hich ~11 is turned. The exposed s~rface area includes the pile of excavated unle'ss the pile is covered per Section 8-~0-~0~. 8~0-20~ A~ratl~ Volume: The volume of ~ii being aerated shall be calculated as follows: the exposed surface ar~a (in square fe~t or square meters) shall be multiplied by the aeration depth. 8-~0-Z05 ConMminat~ Soi1: Soil which has an organlc content, as m~asured using the procedure lA Section 8-q0'-~02, exceeding ~O ppm(~t). 8-A0-206 Organic Comp~nd: Any compound of carbon~ excluding methah~ carbon monoxide, carbon dioxide, ¢arboni~ acld~ me'talllc carbides or carbbhateS ammonium carbonate. A1 - 1 8-40-207 Organic Co. tent: The concentration of organic compounds measured in the composite sample collected and analyzed using the procedures in Sections 8-40- 601 and 8-40-602. 8-40-208 Vap<x' Free: The process of purging gases from a tank using dry ice to replace organic vapors with an Inert atmosphere. 8-40-20:9 Ventilation: The process of purging gases from a tank by blowing or drawing another gas through the tank. 8-40-]00 STANDARDS 8-40-301 Unconm-olledAeration: A person shalinot aerate contaminated sol1 at a rate in excess of that specified in Table I for the degree of organic content.. The limitations in Table I apply to the entire facility, and Indicate the volume of contaminated soil that may be added, on any one day, to soil that is already aerating. Table 1 Allowable Rate of Uncontrolled Aeration ORGANIC C0ETENT,' RATE OF UNCONTROLLEO AERATION ppm (weight)(~ll~ Cubic meters/day Cubic yards/day (50 Exempt from this Rule. Subject to Rule 8-2. 50-100 ~459.0 GOO I00-500 91.8 120 500-1000 45.9 60 1000-2000' 22.9 30 '2000-.t000 11.5 15' 3000-~000 7.6 lO 4000-5000 5.7 8 >5000 0~08 0,1 8-40-302 Controlled'Aeration: Soll may be aerated at rates exceeding the limitations of 8- 40-301 provided emissions of organic compounds to the atmosphere are reduced by at least ~0~ by weight. 8-~0-303 Storage Plies: Contaminated soil which Is not being aerated shall be covered except when soil Is being added or removed. Any uncovered contaminated soil will be considered to be aerated. The soil may be covered with a layer of uncontaminated soll no less than six inches deep; or it may be covered with a tarp or other covering, provided no head space where vapors may accumulate is formed. 8-40-310 Undergroond Stcx-age Tanks--Decommissioning: Any person wishing to permanently decommission an underground storage tank which previously contained organic compounds shall follow the following .procedure: 310.1 All piping shall be drained and flushed into. the tank or other container. 310.2 All ilqulds and sludges shall be removed, to the extent possible, from the tank. It may be necessary to use a hand pump to remove the bottom few inches of product. 310,3 Vapors shall be removed from the tank using one of the followlng three A1 - 2 m e thods: 3.1 The tank may be Filled with water, displaclng vapors and hydrocarbon liquids, rater used for this purpose must be collected and/or disposed of in a manner approved by the APCO. ].2 Vapor freeing. ].) Ventilation. 8-410-311 Vapo~ Freeing: 1to person shall vapor free a tank containing more than 0.001 g~llons of liquid organic compounds per gallon of tank capacity unless emissions ~f organic compounds to the atmosphere ~re reduced by at least ~0%. 8-~0-]12 Ventilation: ~o person shall ventilate a tank containing more than 0.001 gall0Ds o~ liquid organic compounds per gallon of tank capacity unless emissions of organic compounds to the atmosphere are reduced by et least 8-~0~00 ADMINISTRATIVE RE(UIRE~ENTS 8-~0-~01 Excavation of Contaminated SoU: The per~n responsible for aeration of any con~amln~ted soil sh~li provide the Oistrict~ by telephone~ ~ith the following information. Th~s shall be provided no less than 2~ hours prlor to the spreadlng or heating of any ~ontamlnated soil. The Distrlctshallbenotifledwithi~.2~Vr~ a~y of the parameters change. ~01.1 Estimated total quantity of soll i'D be aerated. h01.2 Estimated quantity of soil to be aerated per day. h01.3 Estimated average degree of contamination, oK total organic content of h01.q Chemical composition of contaminating organic compounds (i.e., gasoline, methylene chloride, etc.). q01.~ A description of the basis from which thJse estimates were de~ived (soil analysis test reports~ etc.). 8-~0-600 ~AEUAL OF PROCEDURES 8-~0~01 S011 Sampll~: One composite sample shall be col)acted and analyzed for every 50. cubic yards of excavated contaminated soil to be aerated. At least one composite sample shall be collected From each inactive, uncovered storage pile within 2q hours of ~xcavation. Samples are not required i~ the soil uncontaminated. 601.1 Each composite sample shall consist of four separate soil samples taken using the procedures described below. The ~11 samples shall remain separate until they are combined in the laboratory just prior to analysi~ 601.2 'Samples shall be taken from at least thre~ inches below the surface of the pile. Samples shall be taken using one of the following two methods: 1.1 Samples shall be taken using a driven-tube type sampler, capped and sealed with inert materials, and extruded in the lab in order toreduce the loss of volatile materials; or 1.2 Samples shall be taken using a clean brass tube (at least three inches long) driven into the ~il with a suitable instrument. The ends of the brass tube shall then be covered with aldmlnum foil, then plastic end caps, and finally ~rapped with a suitable tape. The samples shall then be immediately placed on ice, or dry ice, for transport to a laboratory. A1 - 3 i~easurement of 0rganlc [:~ntent; 0rganic content of soil shall be determined by the Regional Water (~uallt¥ Control Board's Revised Analytical t~ethodss Attachment 2, 11/8/8S~ or any other method approved by the APe0. Determination of Emlsslons~ Emissions of organlc compounds as specified in Section 8-~0-302 shall be measured as prescribed in the Hanual of Procedures, Volume IV~ ST-7. A1 - 4 TIME (DAYS ~WEEKS) ~'; .CHANGE/N EMIsSION RATE'$ ;'WITH TIME .~ FOR AN EXC, AVATED:SOII~ PILE -- ~ T~ I I '~ ~ I~--~LU~ F"~ .... __ ..... I '~ ATTACHMENT 3 [SC. ST (DATED 87338) Ak AIR QUAtITY DISPERSION MODEL IN SECTION 1. GUIDELINE MODELS IN UNAMAP (VERSION 6) OAN. 88. BOWMAN ENVIRONMENTAL ENGINEERING REV.6.3 SESSION INFORMATION INPUT DATA FILE NAME: LB30.DTA OUTPUT LIST FILE NAME: LB30.LST I *** LEO BLACK BENZENE MODEL 7/6/90 *** CALCULATE (CONCENTRA?ION=i,DEPOSITION=2) ISW(1) = 1 RECEPTOR GRID SYSTEM (RECTANGULAR:I OR 3, POLAR:2 OR 4) ISW(2) = DISCRETE RECEPTOR SYST~ (RECTANGULAR=i,POLAR:2) ISW(3): 1 TERRAIN ELEVATIONS ARE READ (YES:i,NO:O) ISW(4): 0 CALCULATIONS ARE'WRITTEN TO TAPE (YES=I,NO=O) ISW(5) = 0 LIST ALL INPUT DATA (NO=O,YES=i,MET DATA ALSO=2) ISW(6) = 2 COMPUTE AVERAGE CONCENTRATION (OR TOTAL DEPOSITION) WITH THE FOLLOWING TIME PERIODS: HOURLY (YES=i,NO=O) ISW(7) = 0 2-HOUR (YES=i,NO=O) ISW(S) = 0 3-HOUR (YES=i,NO=O) ISW(9) = 0 4-HOUR (YES=i,NO=O) ISW(lO) = 0 6-HOUR (YES=I,NO=O) ISW(ll) = O. 8-HOUR (YES=i,NO=O) ISW(12) = 0 12-HOUR (YES=I,NO=O) ISW(13) = 0 24-HOUR (YES=I,NO=O) ISW(14) = 1 PRINT 'N'-DAY TABLE(S) (YES=i,NO=O) ISW(15) = 1 PRINT THE FOLLOWING TYPES OF TABLES WHOSE TIRE PERIODS ARE SPECIFIED BY ISW(7) THROUGH ISW(14): DAILY TABLES (YES=I,NO=O) ISW(16) = 1 HIGHEST & SECOND HIGHEST TABLES (YES=i,NO=O) ISW(17) MAXIMUM 50 TABLES (YES=i,NO=O) ISW(18) = 1 METEOROLOGICAL DATA INPUT METHOD (PRE-PROCESSED=i,CA~,D=2) I$W(19) = 2 RURAL-URbAN OPTION (RU.=O,UR. RODE I=I,UR. MODE 2=2,UR. MODE 3=3) ISW(20) = 0 WIND PROFILE EXPONENT VALUES .(~EFAUL?S=i,USER ENTERS=2,3) ISW(21) = 1 VERTICAL POT. TEMP. GRADIENT VALUES (DEFAULTS=i,USER ENTERS=2,3) I$W(22) = 1 SCALE E~ISSION RATES FOR ALL SOURCES (NO=O,YES>O) lSW(23) = 0 PROGRAM CALCULATES FINAL pLuME RISE ONLY (YES=i,NO=2) ISW(24) = 2 PROGRAM ADJUSTS ALL STACK.HEIGHTS FOR DOWN,ASH (YES=2,NO=I) lSW(25) - 1 PROGRAM USES BUOYANCY INDUCED DISPERSION (YES=i,NO=2) ISW(26) = 2 CONCENTRATIONS DURING CALM PERIODS SET = 0 (YES=i,NO-2) ISW(27) · 2 REG. DEFAULT OPTION CHOSEN (YES=i,NO=2) ISW(28) = 2 TYPE OF POLLUTANT TO BE MODRLLED (I=S02,2=OTHER) ISW(29) = 2 DEBUG OPTION CHOSEN (YES=I,NO=2) ISW(30) = 2 ABOVE GRO4]ND (FLAGPOLE) RECEPTORS USED (YES.-I,NO=O) ISW(3X) = O NUI4~ER OF INPUT SOURCES NSOURC = i NUMBER OF SOURCE GROUPS (=0,ALLSOURCES) NGROUP = 0 TIME PERIOD INTERVAL TO BE PRINTED (,,O,ALL INTERVALS) IPERD = 0 NUI(BER OF X (RANGE) GRID VALUES NXPNTS - 11 / NUMBER OF ¥ (THETA) GRID VALOES NYPNTS = 11 NUMBER OF DISCRETE RECEPTORS NXWYPT = 10 NUMBER OF HOURS PER DAY IN MET~ROLO~ICAL DATA NHOSRS = 24 NUMBER OF DAYS OF MET1K)ROLOGICAL DATA NDAYS = 1 SOURCE EMISSION RATE UNITS CONVERSION FACTOR TK =.lO000E+07 HEIGHT ABOVE GROUND AT ~IC~ WIND SPEED WAS MEASURED ZR = 10.00 METERS LO(;ICAL UNIT N~]~BER OF METEORO~ICAL DATA IMET = 5 ALLDCATED DATA STORAGE LIMIT = 43500 WORDS REQUIRED DATA STORAGE FOR THIS PROBLEM RUN MIMIT = 1578 WORDS 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** *** UPPER BOUND OF FIRST THROUGH FIFTH WIND SPEED CATEGORIES *** (METERS/SEC) 1.54, 3.09, 5.14, 8.23, 10.80, *** X-COORDINATES OF RECTANGULAR GRID sySTEM *** (METERS) -200.0, -150.0, -100.0, -50.0, -25.0, .0, 25.0, 50.0, 100.0, 150.0, 200.0, *** Y-COORDINATES OF RECTANGULAR GRID SYSTEM *** -200.0, -150.0, -100.0, -50.0, -25.0, .0, 25.0, 50.0, 100.0, 150.0, 200.0, *** X,Y COORDINATES OF DISCRETE RECEPTORS *** (METERS) 3.0, .0), ( 5.0, .0), ( 10.0, .0), ( 20.0, .0), ( 30.0, .0), 40.0, .o), ( 50.o, .o), ( 60.0, .o), ( 70.0, .o), ( 8o.o, .o), *** LEO BLACK BENZENE MODEL 7/6/90 *** *** SOURCE DATA *** EMISSION RATE TEMP. EXIT VEL. TYPE=O,1 TYPE=O ' TYPE=O W (GRA]{S/SEC) (DEG.K); (M/SEC); BLDG. BLDG. BLDG. A NUMBER TYPE:2 BASE VERT.D~M HORZ.DIM DIAMETER HEIGHT LENGTH WIDTH SOURCE PK PART. (GRA~S/SEC) X Y ELEV. HEIGHT TYPE=I TYPE=l,2 TYPE=O TYPE=O TYPE=O TYPE=O E CATS. *PER METER**2 (METERS) (METERS) (METERS) (METE~) (METERS) (METERS) (METERS) (MET~) (METERS) (MHTERS) 0 0 .12600E-03 .0 .0 .0 .15 .00 12.30 .00 .00 .00 .00 *** LEO BLACK BENZENE MODEL 7/6/90 *** * SOURCE-RECEPTOR COMBINATIONS LESS TRAN 001 METERS OR THREE BUILDING HEIGHTS IN DISTANCE. NO AVERAGE CONCENTRATION IS CALCULATED * X ¥ (METERS) DISTANCE SOURCE OR RANGE OR DIRECTION BETWEEN NUMBER (METERS) (DEGREES) (METERS) 1 3.0 .0 -.03 1 5.0 .0 -.68 1 10.0 .0 .32 1 MET. DATA DAY 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * METEOROLOGICAL DATA FOR DAY 1 * POT. TEMP. FLOW WIND MIXING GRADIENT WIND DECAY VECTOR SPEED HEIGHT TEMP. (DEG. K STABILITY PROFILE COEFFICIENT HOUR (DEGREES) (MPS) (METERS) (DEG. K) PER METER) CATEGORY EXPONENT (PER SEC) 1 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 2 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 3 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 4 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 5 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 6 90.0 3.50 2.0 293.0 .0000 4 .1500 . .O00000E+O0 7 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 8 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 9 90.0 3.50 2.0 293.0 .0000 3 .1000 .O00000E+O0 10 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 11 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+00 12 90.0 3.50 2.0 293.0 .0000 4 .1500 .000000E+00 13 90.0 3.50 2.0 293.0 .0000 3 .1000 .000000E+00 14 90.0 3.50 2.0 293.0 .0000 4' .1500 .O00000E+O0 15 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 16 90.0 3.50 2.~' 293.0 .0000 4 .1500 .000000E+00 17 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 18 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 19 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 20 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 21 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 22 90.0 3.50 2.0 293.0 .0200 5 .3500 .000000E+00 23 90.0 3.50 2.0 293.0 .0200 5 .3500 .O00000E+O0 · 24 90.0 3.50 2.0 293.0 .0000 4 .1500 .O00000E+O0 1 DAILY: 24-HR/PD SGROUPI *** LEO BLACK BENZENE MODEL 7/6/90 *** * DAILY 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * ENDING WITH HOUR 24 FOR DAY 1 * * FROM ALL SOURCES * * FOR THE RECEPTOR GRID * * MAXI)ION VALUE EQUALS 222.23890 AND OCCURRED AT ( 25.0, .0) * Y-AXIS / X-AXIS (METERS) / -200.0 -150.0 -100.0 -50.0 -25.0 .0 25.0 50.0 100.0 200.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 150.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 100.0 / .00000 .'00000 .00000 .O0000 .00000 .00000 .00000 .00000 .00000 50.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00687 25.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .16352 8.74955 .0 / .00000 .00000 .00000 .00000 .00000 .00000 222.23890 124.29890 89.44106 -25.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00001 .29088 -50.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00006 -100.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 -150.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 -200.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 1 DAILY: 1 24-HR/PD 1 SGROUP{ 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * DAILY 24-HOUR AVERAGE CONCENTRATION (MICROGRA14$/CUBIC METER) * ENDING WITH HOUR 24 FOR DAY 1 * * FROM ALL SOURCES '* * FOR THE RECEPTOR GRID * * ~XIMU)4 VALUE EQUALS 222.23890 AND OCCURRED AT ( 25.0, .0) * Y-AXIS / X-AXIS (METERS) (M ,TERS) / 15o.o 200.0 200.0 / .00000 .00000 150.0 / .00000 .00000 100.0 / .00000 .00078 50.0 / .27082 1.35601 25.0 / 20.72114 26.17406 .0 / 68.08548 53.48967 -25.0 / 2.78986 7.33467. -50.0 / .02794 .24900 -100.0 / .00000 .00007 -150.0 / .00000 .00000 -200.0 / .00000 ' .00000 1 DAILY: 1 24-HR/PD 1 SGROUP/ 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * DAILY 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * ENDING WITH HOUR 24 FOR DAY 1 * * FROR ALLSOURCES * * FOR THE DISCRETE RECEPTOR FOIHTS * -X- -Y- CON. -X- -Y- CON. -X- -Y- CON. 3.0 .O .00000 5.0 .0 .00000 10.0 .0 .00000 20.0 .0 304.20920 30.0 .0 179.84710 40.0 .0 141.50100 50.0 .O 124.29890 60.0 .0 113.92730 70.0 .0 106.41000 80.0 .0 100.20070 1 'N'-DAY 1 DAYS SGROUP; ! *** LEO BLACK BENZENE MODEL 7/6/90 *** * 1-DAY AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCF~ * * FOR THE RECEPTOR GRID * * MAXIMI3]/VALUE EQUALS 222.23890 A~D OCCURRED AT ( 25.0, .0) * Y-AXIS / X-AXIS (METERS) (METERS) / -200.0 -150.0 -100.0 -50.0 -25.0 .0 25.0 50.0 100.0 200.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 150.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 100.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 50.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00687 25.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .16352 8.74955 .0 / .00000 .00000 .00000 .00000 .00000 .00000 222.23890 124.29890 89.44106 -25.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00001 .29088 ~50.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00006 -100.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 -150.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 -200.0 / .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 .00000 ' N ' -DAY 1 DAYS SGROOP$ 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * 1-DAY AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCES * * FOR THE RECEPTOR GRID * * ~XIMI~t VALUE EQUALS 222.23890 MD OCCURRED AT ( 25.0, .0) * Y-axis / X-AXIS (METF2.S) (METERS) / 15o.o 200.0 200.0 / .00000 .00000 150.0 / .00000 .00000 100.0 / .00000 .00078 50.0 / .27082 1.35601 25.0 / 20.72114 26.17406 · 0 / 68.08548 53.48967 -25.0 / 2.78986 7.33467 -50.0 / .02794 .24900 -100.0 / .00000 .00007 -150.0 / .00000 .00000 -200.0 / .00000 .00000 1 'N'-DAY 1 DAYS SGROUPl 1 *** LEO BLACK BENZENE MODEL 7/6/90 * 1-DAY AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCES * * FOR THE DISCRETE RECEPTOR POINTS * - X- - Y- CON. - X- - Y- CON. - X- - Y- CON. 3.0 .0 .00000 5.0 .0 .00000 10.0 .0 .00000 20.0' .0 304.20920 30.0 .0 179.84710 40.0 .0' 141.50100 50.0 .0 124.29890 60.0 .0 113.92730 70.0 .0 106.41000 80.0 .0 100.20070 1 HIGH 24-HR SGROUPl 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCES * * FOR THE RECEPTOR GRID * * MAXIMUM VALUE EQUALS 222.23890 AND OCCURRED AT ( 25.0, .0) * Y-AXIS / X-AXIS (METERS) (METERS) / -200.0 -15010 -100.0 -50.0 '25.0 ...............--...........----------------------------------------''----'----''''''''' 2oo.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o)' .ooooo ( o, o) .ooooo ( o, o) 15o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o). .ooooo ( o, o) lOO.O / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 50.0 / .ooooo ( o, o) .ooooo ( o, o) .oOOoo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 25.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .0 / .00000 ( o, o) .OOooo ( o, o) .00000 ( o, o) ..00000 ( o, o) .00000 ( o, o) · -25.0 / .00000 ( o, o) .ooooo ( o, o) .00000 ( o, o) .00000 ( o, o) .ooooo ( o, o) -5o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) -loo.o / .ooooo'( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) -15o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) -2oo.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 1 HIGH 24-HR SGROUPt 1 · ** LEO BLACK BENZENE MODEL 7/6/90 *** * HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCES * * FOR THE RECEPTOR GRID * *RAXIMUR VALUE EQUALS 222.23890 AND OCCURRED AT ( 25.0, .0) * Y-AXIS / X-AXIS (METERS) (METERS) / .0 25.0 50.0 loo.o 150.0 200.0 / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 15o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( l, 1) loo.o / .ooooo ( o, o) .ooo00 ( o, o) .ooooo ( o, o) .ooooo ( 1, 1) .00ooo ( 1, 1) 50.0 / .00000 ( O, O) .00000 ( O, O) .00000 ( 1, 1) .00687 ( 1, 1) .27082 ( 1, 1) 25.0 / .00000 ( o, o) .00000 ( 1, 1) .16352 ( l, 1) 8.74955 ( :, 1) 20.72::4 ( 1, :) .0 / .00000 ( O, O) 222.23890 ( 1, 1} 124.29890 ( 1, 1) 89.44106 ( 1, 1) 68.08548 ( 1, 1) -25.0 / .00000 ( O, O) .00000 ( 1, 1). .00001 ( 1, 1) .29088 ( 1, 1) 2.78986 ( 1, 1) -50.0 / .00000 ( O, O) .00000 ( O, O) .00000 ( 1, 1) .00006 ( 1, 1) .02794 ( 1, 1) -100.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( 1, 1) .00000 ( 1, :) -:50.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( 1, 1) .00000 ( 1, :) -200.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( 1, l) 1 HIGH 24-HR SGROUPl 1 *** LEO BLACK BENZENE )40DEL 7/6/90 *** * HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCES * * FOR THE RECEPTOR GRID * * MAXIMUM VALUE EQUALS 222.23890 AND OCCURRED AT ( 25.0, .0) * Y-AXIS / X-AXIS (METERS) (ME?ERS) / 200.0 200.0 / .00000 ( 1, 1) :50.0 / .00000 ( 1, l) 1oo.o/ .ooo78 ( 1, :) 50.0 / 1.35601 ( 1, 1) 25.0 / 26.17406 ( 1, 1) .0 / 53.48967 ( 1, 1) -25.0 / 7.33467 ( 1, 1) -50.0 / .24900 ( 1, 1) -100.0 / .00007 ( 1, 1) -15o.o / .oo00o ( 1, 1) -2oo.o/ .ooooo ( 1, 1) 1 HIGH 24-HR SGROUPl ti, LEO BLACK BENZENE MODEL 7/6/90 * HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROGRANS/CUBtC METER) * * FROM ALL SOURCES'* * FOR THE DISCRETE RECEPTOR POINTS - X - - Y - CON. (DAY,PER.) - X - - Y - CON. (DAY,PER.) 3.0 .0 .00000 ( O, O) 5.0 .0 .00000 ( O, O) 10.0 .O .00000 ( O, O) 20.0 .0 304.20920 ( 1, 1) 30.0 .0 179.84710 ( 1, 1) 40.0 .0 141.50100 ( 1, 1) 50.0 .0 124.29890 ( 1, 1) 60.0 .0 113.92730 ( 1, 1) 70.0 .O 106.41000 ( i, 1) 80.0 .0 100.20070 ( I, i) 1 2ND HIGH 24-HR SGROUPI *** LtD BLACK BEI{ZEIiE MODEL 7/6/90 *** * SECOND HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROCRAM~/CUBIC METER) * * ~R THE ~E~R ~RZD * * ~XI~ V~UE EQU~ .0~ ~D ~CU~ED AT ( 200.0, 2~.0) * ~-~x~s / x-axis (S~T~) / -200.0 -~50.0 -~00.0 -50.0 -25.0 200.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) 150.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) loo.o / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, 0). 50.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) 25.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -25.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -50.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -~00.0/' .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) -~5o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) -200.0 / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 1 2ND HIGH 24-HR *** LIK) BLACK BENZENE MODEL 7/6/90 iii * SECOND HIGHEST 24-HOUR AVERAGE C09{CENTRATION (MICROGRAMS/CUBIC METER) * * I~M ALL SOURCES * * FOR THE RECEFIgR GRID * * MAXIHUM VALUE EQUALS .00000 AND OCC~fl~ED AT ( 200.0, 200.0) * Y-AXIS / X-AXIS (METERS) (METEP~) / .0 25.0 50.0 100.0 ~50.0 ----............................................................_. 200.0 / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 15o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) loo.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 5o.o / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) 25.0 / .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .ooooo ( o, o) .0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -25.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -50.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -~00.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -~50.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) -200.0 / .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) .00000 ( o, o) 1 2ND HIGH 24-HR SGRO~t 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * SECOND HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FROM ALL SOURCES * * FOR THE RECEPTOR GRID * * HAXIMUH VALUE EQUALS .00000 AND OCCURRED AT ( 200.0, 200.0) * Y-Axis / X-AXIS (~ERS) (ME?ms) / 2oo.0 200.0 / .00000 ( O, O) 150.0 / .00000 ( O, O) 100.0 / .ooooo ( o, o) 50.0 / .ooooo ( O, O) 25.0 / .00000 ( O, O) .0 / .00000 ( O, O) -25.0 / .00000 ( O, O) -5o.o / .ooooo ( o, o) -loo.o / .ooooo ( o, o) -~5o.o / .ooooo ( o, o) -200.0 / .00000 ( O, O) 1 2ND HIGH 24-HR S~ROUPI 1 *** LEO BLACK BENZENE MODEL 7/6/90 *** * SECOND HIGHEST 24-HOUR AVERAGE CONCENTRATION (MICROGRAMS/CUBIC METER) * * FK)M ALI, SOURCES * * FOR THE DISCRETE RECEPTOR POINTS * - X - - ¥ - CON. (DAY,PER.) - X - - Y - CON. (DAY,PF2.) ..............--..................--......--......--.--..--....--...... 3.0 .o .ooooo ( o, o) 5.0 .o. .ooooo ( o, o) lO.O .o .ooooo ( o, o) 20.0 .o .ooooo ( o, o) 3o.o .o .o0000 ( O, o) 40.0 .0 .0oo00 ( o, o) 50.0 ..o .ooooo ( o, o) 60.0 .o .ooooo ( o, o) 70.0 .o .ooooo ( o, o) so.o .o .ooooo ( o, o) 1 MAX 50 24-~ SGROOP$ l *** LEO BLACK BENZENE MODEL 7/6/90 *** * 50 MAXI~I~[ 24-HOUR AVERAGE CONCENTRATION (MICRO~]~9[S/COBIC MET~) * * FROM ALL SOURCES * X Y(METERS) X Y(METERS) OR OR OR RANGE DIRECTION RANGE DIRECTION RANK CON. PER. DAY (METERS) (DEGREES) RANK CON. PER. DAY (METERS) (DEGREES) 1 304.20920 1 1 20.0 .0 26 .00007 1 1 200.0 -100.0 2 222.23890 ! 1 25.0 .0 27 .00006 1 1 100.0 -50.0 3 179.84710 1 1 30.0 .0 28 .OOO01 1 1 50.0 -25.0 4 141.50100 1 1 40.0 .0 29 .00000 1 1 150.0 100.0 5 124.29890 1 1 50.0 .0 30 .00000 1 1 150.0 -100.0 6 124.29890 1 1 50.0 .0 31 .00000 1 1 200.0 150.0 7 113.92730 i 1 60.0 .0 32 .00000 1 1 200.0 -150.0 8 106.41000 1 1 70.0 .0 33 .00000 1 1 25.0 25.0 9 100.20070 1 i 80.0 .0 34 .00000 1 1 50.0 50.0 10 89.44106 i 1 100.0 .0 35 .00000 i 1 100.0 100.0 11 68.08548 1 1 150.0 .0 36 .00000 1 1 150.0 150.0 12 53.48967 1 1 200.0 .0 37 .00000 1 I 200.0 200.0 13 26.17406 1 1 200.0 25.0 38 .00000 1 1 150.0 -150.0 14 20.72114 1 1 150.0 25.0 39 .000(N) 1 1 200.0 -200.0 15 8.74955 1 1 100.0 25.0 40 .00000 1 1 100.0 -100.0 16 7.33467 1 1 200.0 -25.0 41 .0(0)00 1 1 50.0 -50.0 17 2.78986 1 1 150.0 -25.0 42 .00000 1 1 150.0 -200.0 18 1.35601 1 1 200.0 50.0 43 .00000 1 1 100.0 -150.0 19 .29088 1 1 100.0 -25.0 44 .00000 1 1 25.0 -25.0 20 · 27082 1 1 150.0 50.0 45 .00000 1 1 .0 -25.0 21 .24900 1 1 200.0 -50.0 46 .00000 1 1 -25.0 -25.0 22 .16352 1. 1 50.0 25.0 47 .00000 1 1 -50.0 -25.0 23 .02794 1 1 150.0 -50.0 48 .00000 1 1 -100.0 -25.0 24 .00687 1 1 100.0 50.0 49 .00000 1 1 -150.0 -25.0 25 .00078 1 1 200.0 100.0 50 .00000 1 1 -200.0 -25.0 ,,, I 86°F (30°C) ~ -- / /68°F (20°c) ~ ~ 50°F (10°C) .--I ~2°[ (O°C) o ~ . · , o lOO0- 20oo 3OO0 SURFACE AREA OF SOIL PILE OR SOIL LAYER (ft2 ) ESTIMATED SOIL EXCAVATION AIR EMISSION RATES FOR BENZENE