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Home My WebLink AboutMITIGATION FILE #3Bakersfield 4700 Stockdale Highway, Suite 120 Post Office Box 9217 Bakersfield, California 93389 805/326-1112 805/326-0191 FAX LEO BLACK ELECTRIC 3909 PIERCE ROAD BAKERSFIELD, KERN COUNTY CALIFORNIA Workplan to Conduct Site Assessment and Interim Remedial Action for Hydrocarbon Contaminated Soil 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 ~. ~_,i~,' Stephen G. Muir ,~,~ Certified Engineering Geologist '~:3o ,~[2~ ,~ ~1~ State of California No. 1224 T ~'~' Expiration Date: 06/30/96 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 1 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 ~1 INC 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 1~1 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 contained as Appendix I. 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, 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 rog/kg); toluene (909 mg/kg); ethylbenzene (323 rog/kg); xylene (2,005 mg/kg); and oil 02060010.o19 I 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 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. \,~- remaining clean soil was ~t~ockpiled adjacent to the excavatlon.~' 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 within the c°nfines of the excavations. 02060010.019 ... · '.~ 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. Analytical results from the soil samples collected from the deeper portions of the 1'993 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); 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 mg/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 #g/I). Total petroleum hydrocarbons as gasoline were reported to be~4~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 I and 2 summarize all of the analytical results for the Leo Black property. 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 of significant 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. WZl 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 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 July, 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 1 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, local surface drainage, sewer systems, and existing excavations on the site and immediately surrounding area will be prepared. Known and potential contamination sources, including existing or previous tank locations, piping runs, 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 Adjacent 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 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 Borinq, 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 where 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!~,,r soil bori ill be advanced to the groundwater surface or approximately 45 feet below grade in locations around the south and west perimeter of the excavation 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 of the soil boring 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. 7'he 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!.9..s__eJ fuel 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. 0206001o.o19 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 fitted with a PVC plug. The screened portion of the well will consist of factory-perforated casing with 0.010-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 well. 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 BTEX 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) °vei'exca~)ati& and on-site surface remediation_; (5) e~cavation 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 .r~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 feasible, 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 Brief letter reports will be prepared quarterly to meet the requirements of a 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 fitted 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 fire 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 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. 0NZI Inc.), 1987, Leo Black Electric Site Characterization: Unpublished Consulting Report, 3 p. WZI 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 Primary $ch DRivE .... ~ ", . Beardsle SITE LOCATION .'" o o "' ~ / 0. .... .~-'... ~. ... '-'-' - "0 ' ~:- ~ ? ",!.",: ,' / . 22 : ~ ~ " ~ ~" o°°. /f ~ ,.~;:'"-', .:~ :. OiY 5umo o - ' ~"1' .~ .loa /~ / ;..i 1: .' ~ ~. -. .. // '~ , Landc~ " " X . . . /' ~It: -- IIII T29S / R27E BAKERSFIELD, CALIFORNIA LEO B~CK E~CTRIC LOCATION MAP 2000' 4000' I SCALE IN FEET DATE ~95 I 02~.~10A I~HIBIT 1 I I B : 15' TVH - 2O35 ~, - TPH-G - N D BENZENE - 5 ~' ' 25' TOLULENE - 50 ~ TPH G ND . ETHYL BENZENE - 24 ~ ' ' X~.ENE- 485 ~ - ND : / ~amole 5' ~1~ tank- : ~ / WH-~74 ~ : TPH D - ND / BENZENE- 32 : TPH'G ND / TOLULENE-~ : / t ' 10.~-11.0' x xl x ),~dl~' ~ ~H-D ~O ~ 15.~-16.0' WATER ...... I rn-u - .~v ~ BT~ - ND TEX-ND : BT~-ND ~NZENE- 38 ~ ~ Y 5 15.~-15.5' ~LU~NE-49 : T 10.0511.5' ~ ~H-ND ~% BE~ENE- 1~ ~H- 2~4 ~ ~NE - 1328 : BENZENE - ~ / ~ ~ PROPERTY : TOLUENE- 19 : ~ BENZENE - 12 BOUNDARY : X~NE - 4~ BENZENE- 2 ~ TPH-G- ND TOLUENE- 26 / ~% BE~ENE - 47 TPH-G - ND ~ ~H-D - 7.2 BTEX- ND - O&G - 32 ELECTRICAL BOX .= WZl INC. ~ BAKERSFIELD. CALIFORNIA B ' LEO BLACK ELECTRIC -1 3090 PIERCE ROAO, BAKERSRELD, CA. DETAILED MAP OF UNDERGROUND o lO' 20' STORAGE TANK SITE I SCALE INFEET DATE 2/95 10206.0010AIEXHIBIT 2 I I LIMIT OF 1993 _ EXCAVATION .~ ~'~ APPROXIMATE LOCATION Q TPH-G-ND A~,,,,,,,, ''''''''~'''~'''''''''''''~'''~'~''''~'''''~'''''''~'~''''''''''''''~'~'' WH-.~ ,,, 13.S'-14.3' ~ - TPH-G - ND ~ Location and depth of soil sample collected 7~93 Approximate location of temporary monitoring · ~ Location and number of boring 7/87 ~, Grab sample 1/91 soil drilled location collected -~- Location of soil samples collected beneath former UST, 2/87 SOIL BORING SOIL LB ~6 GROUND LEVEL FORMER UND~ TANK LOC LB-6 10.5'-11.0' TVH - ND BTEX- ND LI~6 13,9'-14,3' // TVH - ND BTEX- ND 15.0'-15.5' TVH - 5236 p; BENZENE - · TOLUENE - ETHYL BENZ XYLENE- 13: PROJECTED LIMIT OF CONTAMINATION R REED PARCEL FENCE NORTH ,~ SOIL BOF LB #1 GROUND LEVEL FORMER UNDERGROUND 4~p~ TANK LOCATION TVH - 10074 ppm X BENZENE - 32 ppm TOLUENE - 909 ppm 'rmJ_m. _ ~un ETHYL BENZENE - 324 ppm ~H-D - 680 ppm / ~H-G - 430 ppm ~ Projected 4' 'EX- ND TPH-G- ND -- 40' ~j '~' GROUND WATER LEVEL 8/93 LEO BLACK PARCEL B' SOUTH -o :294 ppm NE - 9 ppm~ -- 10' NE - 19 ppm BENZENE - 12 ppm CLEAN FILL E - 406 ppm '\ ~ \ LIMIT OF =m \ EXCAVATION 7/93 -. 20' :)pm JE - 47 ppm PROJECTED LIMIT [~ OF CONTAMINATION [ TPH-G- ND -- 40' ~ ~' GROUND WATER LEVEL 8/93 BAKERSFIELD, LEO BLACK El. 3090 PIERCE ROAD, BAK CROSS SEC~ A-A' & B-, DATE 2/95 I 0206.001( ] B REED PARCEL NORTH GROUND LEVEL FORME[ TAI' ~EAN FILL LB-1 ~ SOIL SAMPLE COLLECTED FROM BOREHOLES - 7~87 Q SOIL SAMPLE COLLECTED FROM EXCAVATION - 7/93 X SOIL SAMPLE COLLECTED 5' BENEATH UST - 2/92 10' 0 10' SCALE IN FEET Al EAST - 0 CLEAN FILL 'VH - ND ~ LIMIT OF W EXCAVATION 7~3 - 30' ,,cted 4' *G- ND ~ 40' GROUND WATER LEVEL 8/93 GEL B' SOUTH - 0 UNPAVED LC) I REED PARCEL Former location of 80430 gallon l-"1 gasoline & 8000 gallon diesel ._J I B - 4 underground storage tanka PROPERTY BOUNDARY (~ TW - I .' excavation $O~L AERATION PILE Limit of remaining ~'~ : depression SOIL AERATION PILE LEO BLACK PARCEL ~) ~1 LOCATION OF SOIL BORING DRILLED BY KRAZAN & ASSOCIATES, 7/91 DRILLED BY WZI, 7~87 W Z I I N C. BAKERSFIELD, CALIFORNIA ~ FORMER LOCATION OF ~0 GALLON GASOLINE LEO B~CK ELECTRIC UNDERGROUND STORAGE TANK ~m ~ERCE ROAO, 9AKE~RE~, C~ Site A~ity Map Depicting Excavation and Soil Boring Locations Leo Bla~ and Reed Pamels 0206.0010 4 SC~ IN FEET I I I OMONITORINGWELL APPLICA'I:IO~ ENVIRONMENTAL HEALTH SERVICES DEPARTMENT HAZARDOUS MATERIALS MANAGEMENT PROGRAM Application Date q- 1~'-~'-3" 2700 "M" STREET, SUITE 300 No. of Wells BAKERSFIEID, CA 93301 PTO No. Y_) MW No.(s) Circle One: MODIFY DESTROY For Office Use Only ~ FACILITY INFORMATION Sec . Project Contact: Allen Waggoner Phone: (805) 326-1112 T/R/Sec: T.29S., R.27E., 23 Leo Bl~¢k Facility. Name: Electric Facility. Phone: Cross Street: Brittan Rd. Address: 3909 Pierce Road City.: Bakersfield Zip: 93308 Owner: Leo Black Estate e/o Ms. Donna Roberts Phone: (805 399-6966 Address:1004 Lorene Avenue City,: Bakersfield ZiP: 93308 B. CONTRACTOR INFORMATION Environmental Contractor: WZI Inc. Phone: (805 326-1112 4 (ou ~oc~a±e ~ignway AddresS:suite 120 City: Bakersfield ZiP: 93309 License No. and Type: NA W.C. No.: WCN23548 Drilling Contractor: Melton Drilling Phone: (805) 589-0521 Address:7101 Downing Avenue City: Bakersfield Zip: 93308 License No. and Type: 508270 C-57 W.C. No.: RJ960-8427 C. ENVIRONMENTAL INFORMATION Depth to Groundwater: 40' Verified By: Allen Waggoner Litholo~ Log Reviewed By: Stephen G. Muir Registration No.: CEG #1818 D. PROJECT INFORMATION Proposed Start Date: 9/18/95 Proposed Completion Date: 9/22/95 Drilling Method: 8" Hollow Stem Auger Type of Well (Circle One0~: G Vadose Zone Test Hole 39/15/95 ~ r~vo-i ce Nbr. 1 i ~,89'79 10:54 am KERN CO RESOURCE ~ANAGEHENT AGENCY : 00 ~4 Street 8aker'sfffeqd, CA 93301 Type of Or'den W CASH ~EGISTER NZ! INC Cus~:omer' P.O.= Wt:~, Sy IOr'der' Dat. e Sh'ip Dal:e I V"fa ~ Terms H0915951 CSR I 09/!5/95 09/15/95 ~CK 09&92 DF I NT Lfine Descrfi p.., Ouan~i~y Price Unit Disc Total ~ &751 I4AZNAT WELLS NONZTORZNG ~ NELL ~ 335.00 E 335.00 H~IN003A -¢.~I 'HAZ~4AT ~ELL ~ONZTOR;NG >i WELL 3 50.00 E ~50.00 H~N003B Or'der Toga 485.00 Amoun~ Due 485.00 P~me~ ~mde By Check THANK YOU ! III LOCKING WELL CAP IN i ALUMINUM UTILITY BOX PAD ! GROUND SURFACE 8" DIAMETER BOREHOLE 2" DIAMETER, FLUSH JOINT, SCHEDULE 40 PVC CASING (Surface to Approximately 40') CEMENT AND BENTONITE GROUT (Surface to Approximately 373 2' OF BENTONITE PELLETS ABOVE SAND (Approximately 37' to 39') GROUNDWATER ESTIMATED · AT APPROXIMATELY 45' ~ SAND PACK, #212 SAND OR EQUIVALENT (Approximately 39' to 65') 2" DIAMETER SCHEDULE 40 PVC SCREEN 0,010" SLOTS (Approximately 40' to 653 BOTTOM CAP WZl INC. BAKERSFIELD, CALIFORNIA LEO BLACK ELECTRIC 309~ PIERCE ROAD, BAKERSF3ELD, CA. GROUNDWATER MONITORING WELL CONSTRUCTION DIAGRAM TABLE I 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-lO LB-11 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 Sample Location: I I 1 I 2 2 2 2 2 2 2 2 2 2 2 2 2 Depth: 1 ft. 1 ft. I ft. 1 ft. 30ft. 32ff. 34ft. 40ff. 40ff. 40fL 40ft. 40ft. 40tt. 40fl. 40ft. 25ft. 25fL Units TPH Gas m~/k~l ND ND ND ND ND 14.00 430.00 ND ND ND ND ND ND ND ND ND ND TPH Diesel m~/k~l ND ND ND ND ND 100.00 680.00 ........... Benzene m~kg 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 ............. X¥1enas m~kg ND ND ND ND ND ND ND ............ Lead mc~l/liter ........................... Sample Number: LB-18 LB-19 LB-20 LB-21 LB-22 LB-23 LB.24 LB-25 LB-26 LB-27 LB-28 LB-29 LB-30 LB-31 iiiiii!i!ili!iiiii!iiiiiiiiii LB-W-1 Sample Type: Soil Soil Soil Soil Soil Soil Soil SOil Soil Soil Soil Soil Soil Soil ::::::::::::::::::::::::::::::::::::::::::~,,,~ ,~ Water Sample Location: 2 2 2 2 2 3 3 3 3 3 3 3 3 3 :::::::::::::::?:?:::::::::::::?::?::: 4 , Depth: 25 ft. 25 ft. t 5 ff. 15 ff. 15 ff. 1 ff. 1 ff. 1 fl. 1 ff. 1 ft. 1 ft. I ft. , 1 ft. 1 fl. ::::::::::::?:::::::::::::::??::::::::?::, '45 ft. TPH Gas rog/kg ND ND ND ND ND ND ND ND ND ND ND ND ND ND:i.!!?.!?i:,?!:!:i~:i:~:~:~:i:i:i:~:~:i:i:~:!:i: 7100 u TPH Diesel .. m~k~l ................ :::::::::::::::::::::::::::::::::::::::::::::: 2300 u Benzene mg/kg ................... :ii!::!~i::i::i::?:i::iiiii~.?:i!i::ii ND Toluene mg/kg ................. !;!iii;i;;iiiiiiii!i!i?:i ND Eth¥1benzene m~/k~ .................. ::iiiiiii!i::iiiiiiiiiii!iiiiiii ND X¥1enes .. m~kg ................... iiiiiii!;i!i!iiii~;iiiiiiiiii. 280 ILead rog/liter ........ 0.84 - ND - 1.50 ND - 3.30 0.69 iiiiiiii::iii?:!::::~::i::~ !::~· -- o2/oe/~s 9cJ LEOBLACK/T,~BLE1 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 2/1 0/87 THROUGH 1/1 7/91 Sample Number LB-1 LB-2 LB-1 LB-1 LB-2 LB-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 7/1/87 7/1/87 7/1/87 7/1/87 7/1/87 1/17/91 Sample Location: 1 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~l/k~l ............................ 1.20 TPH Diesel rog/kg ............................ Benzene mcj/kcj 31.55 5.24 9.01 1.90 -- ND ND ND -- ND 38.49 ND ND ND ND Toluene mcj/k~l 909.30 50.36 19.21 25.91 -- ND ND ND -- ND 48.62 ND ND ND ND Ethylbenzene mg/kg 323.59 23.94 11.84 47.00 -- ND ND ND -- ND 129.80 ND ND ND ND iXylenes mcj/kc, i 5972.73 484,95 405.85 642.28 -- ND ND ND -- ND 1328.30 ND ND ND ND Isoprop¥1 Benzene m~/k~l 29.73 10.91 ND 67.32 -- ND ND ND -- ND ND ND ND ND -- 'l'otalVol. Hydrocarbons m~l/k~! 10074.5 2034.8 2293.83 3690.88 -- ND ND ND .- ND 5263.20 ND ND ND .- Oil & Grease mg/kg 133 130 -- 144. 318. 858. (-) 20 - 148. - ........ 32. 02/09/95 BCJ LEOBLACK/TABLE2 1) Sample collected directly beneath tank 2) Sample collected from soil boring by WZI 3) Sample collected from excavation by WZI WILSON ZUBLIN INC. TECHNOLOGY CONSULTANTS 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 the tank has reached groundwater. The toe of the contamination 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 was 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 mg/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 43' 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. ~VILSON ZUBLIN INC. Page 3 Table No. 1 summarizes the cores taken and preserved; those sent into B. C. Laboratories for analysis 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 INC. SYCAh- · - ':' DR ..... ~ V¢ILLOW ORIVE ~'"' LEO BLACK EL -~' - 3909 Pierce Road Bakersfield :'~' ..; ., .' SH o,_.... Gl. STREET _ ; ,,. GE~ · : ~.~' .-.L ~ UHIN WAY ,, j u3 Z / ~ ~- ANTONIOWAY / _L / I ~ )R i · T -' ~3 ~S Sl' , __ THOMAS AVE I I ROSEDALE HWY.. ~j -;'- COMMERCIAL ST ST ~RNIA ~ WILSON ZUBLIN INCo Baker.qfield. California LEO BLACK ELECTRIC SITE CHARACTERIZATION SCALE IN MILES -N- . LOCATION MAP 0 0.4 0.8 · Geol.: Kiser, Greenwood~ 7187 I DN: 143 Engr.: Wilson I EXHIBIT No. 1 I Kern Count. y Ho~lth ~ep~rCment '- PermiL N_ · ~700 Flower SUree~, Bakersfi,eld, CA 93305 No. of Tanks to · -- U'. h~ of ~lication (Fil~ Out One Application Per Facilit~ : ~n~rary Closuf~/A~fldo~e~ ~ _.. ~e~anen~ Closurg/~adomnen Facility Nam~ ~ ~~~~~ ~ - . ' __ . _ ' -. Facility ~dress ~qO~ ~~ ~..~~... Nea{e~t. Cross S~ T R '- - (Rural ~ca~io~ ~ly; . . ~ner ~6q ~{~ ~~i~ Tele~one O~ racor ~~. ~elephone ~dress - ' ~ Zip , _ B. Water to Facility Provid~ by ~,~: ~~ ~'~, ~P~ to Groundwater Soil Characteristics at Facility ~~{ --~~. ~sis for ~il ~ and Gro~d~ter ~pth ~te~inatio~ _~]~ ~dress ~(~ f~~ ~ ~~, Zip ~~ Tele~Ione Pro~s~tarti~ DaCe /~[-I~ Pro~ C~pletion ~rker's C~a~ion CertifiCation ; O~ ~(~ Insurer ~~, ~dress ~ ~~,~,. ~~ Zip ~8 .. Te~e~one ~Dq. ~glf . Pro~s~ Starci~ ~%e Z~I[8~ .- Pro~s~ C~ple~ion '~rker's C~a~ion Cert'ifiOat~on ~ ~_- Insurer ~ ' D. Ch~ical C~sition of Materials Tank ~ Chemical Stored (non-co~ercial name) Dates Stored Chemical previously Stor~ lif d i'k'ferent; Co to to '1- [ F. This application for: ~emoval or ~a~undo~ent in pla~ · * PL~E ~OVIDE INFO~TION REQUEST~ ~ ~E SIDE OF ~IS SHE~r B~ORE APPLX~TI~ ~R ~. This foLTn has been completed under p~nalty of perjury and to t, he best of ,ny knowlLwdge is trt a~¥3 correc,t~--'] EXfIIBIT N, " ' ,I,2:7,, - 2 , k~>~'~//~ ~L- Title Da~e pro,Wide Descr~p~'.~ol~ of P~ ',ual Layout of F~cLi£=¥ Usi~"'L' .:e Provkl~ ~low; l~ude All the Followi~]-~,~fo~oq: ~ ~ ~caaion of 'Fa~%k(s), Piping & Dis~nsef(s) /-~[o~s~ S~piing Locatio~ Indicati~ Approximate ~p~ ~/of Samples ' ~ ~earest Sur~e~ or Intersection ~y Water ~lls or Surface Waters.W~thin 100' R~i~ of Facil i ty , /~ NORTH ' Approved By. Scale "l FORMFR LOCATION OF GROIJND TANK '~' - ' '" X X FENCE /~ PROPERTY LINE z~ ASPHALT A' A (None Detected) (None Delected) (None Detected) I LB 6 LB 3 LB 2 2293 ~ LB 5 B ASPHALT BUILDING WILSON ZUBLIN INC. ~:,l<ersri,,if!i Cill!f,,r?i:~ LEO BLACK ELECTRIC SITE CHARACTERIZATION -N- TOTAL VOLATILE HYDROCARBON... SCALE IN FEET TEN FEET BELOW GROUND FEET BELOW (u g/g ) GROUND 0 5 10 Geoi.' Kisor, Groonwood~ 7187 ~ ON: 144 " B: I '" i FOR~R LOC; UNDERGROU~ '~ PROPERTY LINE A (None Oet~ted) 5 2 6 3 ~ 1 0 0 7 S (None Der LB 6 LB 3 LB /j~ ~ ~ ~o. 800 - 6000 TOTAL FIFT[ 4000 3 ~1t91 - LB 1 2000 ~r13 FE~ G[ A LB 6 LB 3 LB FORMER LOCATION OF UNDERGROUND TANK 5.. I I - I I 2035~~° 10 - None Detected) None Detected) -- Detected 15 ,,, ~EW I I ~ed) IA I / I VOLATILE HYDROCARBONS ~N FEET BELOW GROUND (ug/g) ' LB 5 ~ -~.o~o ~ .o ~ . . -. . ,, 5~ ~ HYDR~AR~N O=R ~ TOTAL VOLATILE II . HYDROCARBONS o~ (ug/g) 0 SCALE IN FEET Non~Dete~ed) ~WILSON ZUBLIN INC. ~ BakersfleldI California LEO BLACK ELECTRIC SITE CHARACTERIZATION VOLATILE HYDROCARBON CONTAMINATION PLUME: ~22~Z~22L ..... ~~A~....~.... MAPS and CROSS SECTIONS Geol.: Kiser, Greenwood] 7187 } DN: 145 Engr.: Wil~n ~ FORI~[ER LOCA¥~ON OF ~ LJNDERGROL~ND TANK FENCI ~' PRO'PERTY LINL~ · ,-, /- X ASPHALT A A' LB6 LB 3 LB 2 8 LB LB 5 6 4 B 0 '' ASPHALT ~ WILSON ZUBLIN INC. BUILDING~ Bakersfield, Cnlifornia II I II I1 II I LEO BLACK ELECTRIC SITE CHARACTERIZATION VOLATILE HYDROCARBON SCALE IN FEET CONTAMINATION ISOPACH 0 $ 10 Geol,: Kiser, Greonwood~ 7187 ~ DN:, 147 D .o FORMER LOCATION OF UNDERGROUND TANK v FENC! PROPERTY LINE ~' 'l ASPHALT [ 1 ;3' le~ titan 20 I LB 6 LB 3 I ., LB 2 44 I LB 5 ASPHALT L~ WILSON ZUBLIN INC. BUILDING i~ak er.,;?icld! C,'mli ~fo r n~ !i~ LEO BLACK ELECTRIC SITE CHARACTERIZATION OIL AND GREASE FIFTEEN FEET SCALE IN FEET BELOW GROUND (mglkg) * 13 FEETBELOW 0 5 10 Geol.': Kiser, Greonwoodl 7/87 I DN: 146 GFIOIIND Enrlr,: Wilson I ~w **~*'v' ~,*,.. ~,~ APPENDIX 1 LABORATORI 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:2-19-87 BAKERSFIELD, CA. 93305 LAB No.:2437 Sample Description: LEO BLACK ELECTRIC 5' 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 ~g/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. A $1I ICH L TUII~ ORATORI J. J. EGLIN, lEG. CHEM. EN~. ~T~LWM MAIN OFFIC~ 4100 PIERCE ROAD, BAKERSFIELD, CA. 93308 PHONE 327-491 Purgeable Aromatics (SOIL) MC NABB CONST. ATTN: BRIAN MC NABB Date of !616 STARK STREET REPORT:2-19-8? dAKERSFIELD, CA. 93305 ~ ~ LAB No.:2436 ~ ~' UNDER TANK gATE DATE SAMPLE DATE ANALYSIS ;AMPLE COLLECTED: RECEIVED @ LAB: COMPLETED: 2-10-87 2-11-87 ~-17-87 Minimum Reporting Analyses Reporting Constituent Units Results Level Benzene Hg/g 5.24 0.10 Toluene ~g/g 50.36 0.10 Ethyl Benzene ~g/g 23.94 0.10 p-Xylene Fg/g 148.28 0.10 m-Xylene ~g/g 148.28 0.10 o-Xylene ~g/g 188.39 0.10 Isopropyl Benzene ~g/g 10.91 0.10 Volatile Hydrocarbons ~g/g 1459.39 0.50 Total Volatile Hydrocarbons ~g/g 2034.79 0.10 EPA 5020/8080: DRY MATTER BASIS COMMENTS: Oil ~ Grease: 130 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 report. 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. Analyst DATE DRILLED: 7/1/87 LEO BLACk( ELECTRIC LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB 1 HOLE DIAMETER: 6W2" O.D. WZI S,~MPLES -~o ~ : ~ REMARKS DESCRIPTION Depth Lith- ~: Eo. NO. TYPE ~ iT. (ft) ology ~ ~ ~ ASPHALT and ASPHALT RESIDUE - ~ 8:30 SAND, tan, fine to very fine grained with - ccassional medium to coarse grains, - ::::.':~:~:~:.~:: ::::: :5 ?-~ >¥ .'.'::: ;:~:".';: :.:.:.:.....;+ .::..'.,,.~ ~ ancular to subangular, micaceous, massive, slightly moist, no gasoline odor ~::~::~;~.~i..<.~ A 1-3/8" split spoon sampler :~[..*.<~.~:~ Split 3 used after a 2-3/8" :::':':'~ <::~ ~';:~I1~ was -- iii.'.'-;?~!ii 1 Spoon 2 sampler (equipted with brass :::~[~.~/~ 1-3/8" 6 sleeves) failed to recover any Slight gasoline odor began at 7' - ,~.~ :~:~.~.~.~¥~{~ - ~ :::::::::::::::::::::::::: sample material. SAND, as above, except increasing v-,v" ~:~'"'~'~*~<~.-:~.-:~ Grain size with depth. - ~-,~:.-.~-..-, v-, -,; .--.; ;-~ ~-~ ~)id not attempt to use a 2-3,'8' Increasing gasoline odor with depth -- 1 0 ~v- '~:"~:";[/~J 2 Split sampler - ~ '~'."~'-"; Spoon 13 9:15 ~'4:'~..'~ TOTAL VOLATILE _ ~, ;.,~-;.~;.--~ 1-3/8" HYDROCARBONS: 2293 ug/g SAND, tan, medium to coarse grained ~ ;',;.-.'~;~-~ OIL and GREASE:144 mg/~g wi:h some finer grains, subangular to - ~-'~;'~;'~ ~ ,....~..- q Split 2 subrounded, micaceous, massive, - ~,~,~..~:/~: 3 Spoon 4 TOTAL VOLATILE slightly moist, strong gasoline odor. -- 1 5 .~ 2-3/8' 6 HYDROCARBONS:3691 ug/g No Free Groundwater _ Total 10:10 Encountered Depth --20 ~ Sand, fine grained, massive ~ Conglomerate I Asphalt ~ Sand. medium grained, massive ~ Siltstone / AsphaitResidue ~ Sand, coarsegrainod, massive ~ Clay or Claystono ~ Concrete ~ Sand, poorlysortod ~ Limestone ~ Hydrocarbon Odor DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC IAI LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB HOLE DIAMETER: 6-1./2" O.D. WZl SAMpLEs '~ ~ E REMARKS DESCRIPTION Depth Lith- ~= ~ NO. TYPE ~o o o i-= (ft) ology ASPHALT and ASPHALT RESIDUE 6:30 - j SAND, tan, fine to very fine grained - :.:.?: :.: ~ ~,.-'~:,:,':. x ,:.,':.':..: with oCassional medium grains, - angular to subangular, micaceous, _ :~.,::~::~:~:~:~:~.~:~:.~: massive, slightly moist, no hydrocarbon ~.~:~.'.<~:~ cdor -- 5 k--71 Split OIL and GREASE: - ~:~:~:~:~:~:~:-"-'~:~:~:~L/Y~ 1 Spoon 13 318 mg/kg ::!i;.':'i~;~i~;:!~i~i!:: 2-3/8' Slight hydrocarbon odor began at 7' - v~ '~.:.'.~:::-:::::.: SAND, as above, except increasing grain - size with depth, slight hydrocarbon odor. _ ~ .:,;.'.,;.' TOTAL VOLATILE Increasing hydrocarbon odor with depth -- 1 0 ,~.~.~?.~? ~ Split 3 '~"~':'"~'/L/~ 2 spoon 3 7:20 HYDROCARBONS: SAND, tan, fine to coarse grained, -- ~_ ,.'.'.4....'.;:: 5 (None Detected) very poorly sorted, subangular to - ~.,..;~:.'.~.:.: 2-3/8' subrounded, micaceous, massive, ,~.,.....~......~/; OIL and GREASE: ~ ...'.:...'~.,; 858 rog/kg slightly moist, strong hydrocarbon odor. SAND, as above, except with less fines, ~- ~ .'-'~'.'-~ becoming moister. '- 1 5 ~'~'~-;;; ~)I Split TOTAL VOLATILE HYDROCARBONS: Groundwater Encountered _ ,~ .-~-.-~..,~3 Spoon 14 (None Detected) 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, medium grainod, massive ~ Siltstone ~ Asphalt Residue ~ 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, Kiser,Greenwood TEST BORING LB 3 HOLE DIAMETER: 6.[./2' O.D. WZl · _E SAMPLES ~ ~ : ce REMARKS Depth i Lith- DESCRIPTION r, NO. TYPE _O.o ~ I.: (ft) ology =: o. ca ASPHALT and ASPHALT RESIDUE 10:20 - SAND, tan, very fine to fine grained with - :==,==...:;=:=:.~=: ocassional medium to coarse grains. - · :'::-~:':':":': :¥:h?.':'× :~ angular to subangular, micaceous, massive, slightly moist, no gasoline odor :~:~:~:~:~:?::';"~::"~:~:~:~:~:~:~: Split 2 Spoon 4 SAND. as above, except increasing ........ ~¥=:===,,:.< 2-3/8' 6 grain size with depth. ::~:::~:.:~;.:::::. ¥,:..~-:-:,: SAND, tan, fine to medium grained ;: ¢;.';;.'; TOTAL VOLATILE with some coarser grains, subangular to ~ 10 ;...;;..;;,,.'. ~ Split HYDROCARBONS: ~; ~: ';".'; 2 Spoon 13 subrounded, micaceous, massive, - ,;; ¢; ,;;.~[/~ (None Detected) ~: ~:. ~.'.~ 2-3/8' slightly moist, no gasoline odor. - ;.,.-;;;;;..; OIL and GREASE: 148 mg/kg -- ~:.~ ~.'.~ Slight gasoline odor began at 14' - ~:~51; :. ; :. .; Did not attempt to use a SAND, tan, medium to c~arse grained, ~ 1 5,~;""~:'"'~ ~ 2-3/8" sampler 3 Split 10 11:40 NOTE: Hydrocarbon 'rainbow" subangular to subrounded, micaceous, - Totalv~ Spoon massive, very moist, gasoline odor. Depth 1-3/8' appeared on the sampling tool - TOTAL VOLATILE No Free Groundwater - i HYDROCARBONS: 5263 ug.,g Encountered ~20 DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC I .1 LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB-5 HOLE DIAMETER: 6-V2' O,D. WZI [ SAMPLES (~ = ~ REMARKS DESCRIPTION Depthl LJth- c= NO. TYPE (ft) elegy ~ 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 -L~I Spoon 3 with rare small pebbles, subangular to 1-3/8' 6 subrounded, micaceous, massive, - slightly moist, no gasoline odor. - SAND. as above, except increasing - 2:50 grain size with depth. ~ 1 0 k"-J Split 2 -LXJ 2 Spoon 2 - 2-3/8" 6 1:10 SAND. tan, medium to coarse grained, _ subangular to subrounded, micaceous, - ' massive, very moist, no gasoline odor. - ." ,.;.',"."-:" Did not attempt to use a No gasoline odors -- 1 5 'c..-,;.-.c.-.c ~ Split 3 Spoon 10 11:40 2-3/8' sampler No Free Groundwater - Totalv~ 1-3/8" TOTAL VOLATILE Encountered _ Depth HYDROCARBONS: (None Detected) --20 ~ Sand, coarse grained, massive J~ Clay or Clays'tone ~ Concrete ~ Sand, poorly sorted ~ I_imestone ~ Hydrocarbon Odor DATE DRILLED: 7/1/87 LEO BLACK ELECTRIC LOGGED BY:Rector, Kiser,Greenwood TEST BORING LB-6 HOLE DIAMETER: 6-V2' O.D. WZ! Depth Lith- ~: E SAMPLES = E (ft) ologym NO. TYPE03 DESCRIPTION REMARKS ASPHALT and ASPHALT RESIDUE ~ 1:40 ;~,~.'.~.~ SAND,'tan, ve~ fine to medium grain~, - ;.':~-'~.'~ angular to subangular, ve~ micaceous, - massive, slightly moist, no gasoline odor _ ;.';4.; 4.'. ; ~ 5 ;.'.~.'.~. ~ ~ Split ;~.',~,~ SAND, tan, fine to medium grained, _ :~:.~,.~ 1 Spoon 11 subangular to subrounded, mi~ceous, ;.'.4.'.~¢.; 2-3/8" massive, slightly moist, no gasoline odor. - ;'-~¢'~'"~ - ;~,.4 2:00 SAND, tan, fine to coarse grained with rare small pebbles, subangular to ~ 1 0 ;...4¢.~¢.4 ~ Split TOTAL VO~TILE subrounded, micaceous, massive, ;,.~:.~.'.~~2 Spoon 17 HYDROCARBONS: -- ;...~...~ ~. ~ slightly moist, no gasoline odor. _ ;~¢.~...q 2-3/8" (None Detected) SAND, tan, medium to ~arse grained, ;~ ~' subangular to subrounded, micac~us, ;¢ 4¢ ~,.< Split TOTAL VO~TILE 3 massive, ve~ moist, no gasoline odor. ~ ~ 15 Spoon 21 2:25 HYDROCARBONS: - Total 2-3/8' (None Detected) No gasoline odors - Depth No Free Groundwater - Encountered -- ~20 AGRICIJL TURE LABORATORIES, Inc. J. J. EGLIN, REG. CHEM. ENGR. P£Tf~OL~U¥ 41OO 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. ~/~.~J. ~][[~'~ Analyst AGflICUL TUfI£ ,,,,,,,,,,,,,,, LABORATORIES. Inc. J. J. EGLIN, REG, CHEM. ENGR. P£Tf~OL£1J~ 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.: 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 l0 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. ~ J~ J.~g-l~in- Analyst LABORATORIES, Ir-lo. 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.: 12754 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-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. Analyst AGflI£UL TUllE ,,,,,,,, ,,,,,,,, ABORATORIES. In . J. J. EGLIN. REG, CHEM. ENGR. PET~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.: 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. (-~. ~/3. F~li~- Analyst ,,,,,,,,,.,, ,.,,,.,,.,,., LABORATORIES. Ir'lc. J. J. EGLIN, REG. CHEM. ENGR. PETf~OLEIJ¥ 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-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: NO WATER IN SAMPLE. SOIL MATRIX OF SAMPLE WAS ANALYZED. VOLATILE HYDROCARBONS: Quantification of volatile hydrocarbons present (Cl 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.dJ. ~1~'- Analyst AGflI~,UL TI, I~£ LABORATORIES. Ir-lC;. J. J. EGLIN, REG. CHE/qA. ENGR. t'ET#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.: 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. 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. By ~. ~ Analyst LABORATORIES. Inc. J. J. EGLIN, REG. CHEM. ENGR. PETROLEUM 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.: 12758 Sample Desc.: LB ~3 15-15.5' 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 38 49 0.10 Toluene ug/g 48 62 0.10 Ethyl Benzene ug/g 129 80 0.10 p-X¥1ene 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 report. By ~. ~.' E~i~-' Analyst AG~ICUL ~E J. J. EGLIN, REG. CHEM. ENGR. ~OL~¥ 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. 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. Analyst LABORATORIES, Irq ':. 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 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-X¥1ene 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. _ ORATORIES, Inc. J. J. EGLIN, REG. CHEM. ENGR. PETFIOLEIJM 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: 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. By 6f J~. j.~gl-~n Analyst AGflI~UL TUfI£ LABORATORIES, InC. PETROLEUM 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.: 127S4 - 127SS (addition) Sample Description: Oil & Grease, mg/kg LB#2 10-11', Soil, sampled by E. Greenwood/M. Rector 8S8. LB#2 1S-16.S', Soil, sampled by E. Greenwood/M. Rector (-) 20. B C LABORATORIES, INC. J. J. EGLIN, REG. CHEM. ENGII. PETf~OLEU¥ 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 Wilson Zubltn, 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 & GreaseD m~/k~ LB1 @ 13-14.5'. 07/01/87 .144. LB2 @ 5' 07/01/87 318. ~ LB3 @ 10-10.5' 148. ? B C LABORATORIES, INC. LABORATORIES, IBC. J. J. ~LIN, REG. CH~. ENGR. ~ET~O~EUM 41~ PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 C}~IN OF CUSTODY RECO~ Invoice to: Company Address Sample Type: (check one) Drinking Water Surface Water Wastewater 0tl /Soil Sludge Other (specify) Collector's Name ~-~-- 6~C~o-~e~/~. ~C~-- Telephone ( ) ~ -[(('~ Company' Name (5~ ~ / ~~ Company' s Address Date Collected: 7['/e~ ~ Time collected: Sample(s) Relinquished to 'Date Time .J, Date Time 1. Sample Relinquished by: Name Date Time 2. Sample Received by: Name Date Time 3. Sample Relinquished by: Name Date Time 4. Sample Received by: Name Date Time 5. Sample Relinquished by: Name Date Time 6. Sample Received by: Name Date Time J. J. EGLIN, REG. CHEM. ENGR. ;'E;71OIEIIM 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 CHAIN OF CUSTODY RECORD '-- Report to: Company Invoice to: Company ~dress Sample Type: (check one) Drinking Water Surface Water Wastewater Oil ~ Soil Sludge '"-0 Other (specify) ~d ~3w'~ Collector's Name ~ ,~ee~ec~/~ ~C~'- Telephone <SO~> ~ I ~] % Company' Name ~, { 5~ ~1, ~ Company's Address ~ % ~~ Date Collected: ~/I/~ Time collected: ~ 'oO ~ ~ %f ~ ~,~ SampleCs) Relinquished to lab by: ~ ~D[ ~~ Date Time Sample(s) Received in lab by: Date Time 1. Sample Relinquished 2. Sample Reeefved Name Date Time 3. Sample Relinquished by: 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 APPENDIX II WZI 1993 SUMMARY REPORT B~[~ersfield Oresno 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 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 CJames Aller{ Waggo'r~r ertified Engineering Geologist State of California No. 1818 Expiration Date: 03/30/95 02060010,011 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 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, 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 02o6oo10.011 TABLE OF CONTENTS .~ Page 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 -Juiy 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 02060010.011 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 0NZI, 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. 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 1 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. Gasoline, diesel and xylene contamination were identified in the ground water sample 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%. I!1, 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 WZ! 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. 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 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 during 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 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 Samplin.q Pro,qram 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 hydrocarSons 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.Ol I Page 5 ,Nc 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. 02060010.01i Page 6 Ground Water Samplina 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. 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 VIII. REFERENCES WZI Inc., July, 1990, Leo Black Estate Site Remediation Work ~Plan Revised Technical Approach, unpublished consulting report. Wilson Zublin Inc. (WZI Inc.), July, 1987, Leo Black Electric Site Characterization, unpublished consulting report. United States Environmental Protection Agency, September, 1986, Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846. 02060010.011 Page 8 .--' ~ Beardsley i' Pri~n.ry DR','VE ,. ,.,'~ : ' · # I: J ' ' ,,'i 3 1 5 ..... ~"I °%' '" " ...... la' Iii o o . · ~ ,~ GFb~ . .....--~ ~ SITE LOOATION ..~..-' · , ;o .6~' :' " '--' ~0 "'~' :~' " "!" ' / 24. ~ · o . , ~ / ' ~ '.:;" '~' o,~?.~ ~.~.~ ~ ,.. ~. I°L.~ [. L Do 0~ · · ,;~... · '" 26 'i ' o OBu . T29S / R27E BAKERSFIELD, CALIFORNIA LEO B~CK E~CTRIC ~ PIERCE ROAD, BAKBS~ELD, CL LOCATION MAP 0 20QQ' 4Q~00' SCALE IN FEET DATE 8/93 I 0206.0010A [EXHIBIT 1 A West AF O' -- TAI GROUND~ 10' -- WATER LEVEL '.' ; .'"'~... ' 7~87 ,, ~', ' ".~ ., -- UJ 20'-- n 30'-- C3 GROUND ' ° ' &' 40' -- WATER LEVEL ..... 8193 '~' e' ' §C)°-- B North PROPERTY LINE I READ PARCEL ~ J ~ LEO BLACK PROPI I APPROXIMATE o'-- ..... ~ '.'. '." '..I~.. oTANK LOCATION 10"-- W E i.u 20'-- n 30'-- ,,, ..... :. :.~ .. . (~ /.,,, ': ~ 'GROUND - 40'-- WATER LEVEL ' ' '--"' 8/93 ~ , , ' .'. ,~ -~_ ,,/' '.~"- ' ' . o . o- '.~. .: o.,) · .~,..o. ia. II I I I I I II I I I IIIII Al East I :ENCE PIERCE ROAD E )N .' '. .... ' SAMPLE LOCATION P SAMPLE LOCATION PROJEC'I~D [':':' :: ::'t SANDSTONE ' South ~ COBBLEY SANDSTONE 0 !. 2'0, SCALE IN FEET :: · ....... ,. .... ~!,..1.~' BAKERSFIELD, CALIFORNIA LEO B~CK ELECTRIC 3090 PIERCE ROAD, BAKERSFIELD, CA.: . FENCe: GATE AERATION CC~ITAU~IATED soiL STOC~ILE LB-4 O~ LB-3 5~ ~. yd. LB'2 CLEAN SOIL STOCKPILE SHED 3~0 CU. YD. BUILDING JUNK I I DOOR JUNK JUt,IK COMPOSITE SOIL SAMPLE LOCATIONS FL~ SLOPE ~ . . ~ T~ OF CUT DUILOINO ,. BAKERSFIELD. CALIFORNIA, LEO 8L~CK,=L~CTmC II 30.0 .,.cE .o~, ,,,,,,.;..,u,~ ~,."~ I I SOIL EXCAVATION.'. o ?, :,,~? :,, ~;P~ ;"'i I! APPENDIX II WZI 1993 SUMMARY REPORT Bakersfield eresno 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 LEO BLACK ESTATE SUMMARY OF EXCAVATION AND REMEDIATION OF · CONTAMINATED SOILS 3909 Pierce Road Bakersfield, California August, 1993 Prepared by: WZl 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 yC James Aller~ Waggo'r~r ertified Engineering Geologist State of California No. 1818 Expiration Date: 03/30/95 O2O6O010.011 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 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 ! 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 0206001 O. Ol I VVZlINC 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 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 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 ONZI, 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 atthe 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 (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. Gasoline, diesel and xylene contamination were identified in the ground water sample 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. 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 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 Samplinq 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 BO Laboratories in Bakersfield, California, a California Department of Health Services (DOHS) certified laboratory. Sampling during 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 · 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 Pro.qram 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 SWT000 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 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. 02060010.011 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. Numerous sources of hydrocarbon contamination have been identified on surrounding 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. o206OOlO.Oll Page 7 VIII. REFERENCES WZI Inc., July, 1990, Leo Black Estate Site Remediation Work Plan Revised Technical Approach, unpublished consulting report. Wilson Zublin Inc. (WZI Inc.), July, 1987, Leo Black Electric Site Characterization, unpublished consulting report. United States Environmental Protection Agency, September, 1986, Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846. 02060010.011 Page 8 ~ Beardsley , Prhnary Sch · · B~4 - ' ~ '~,.. ~ ................... o~vE .... .~ : ·. ~ ".% ." / ' ~ Beardsley I .. . .,~=__ ..... ..... , ~ ~ ¢~. ......~ ............. ' * 0 ~ o ee "'~,'~ ~ - -- ** o , . ~ / · -,-~, ,0.~ . .= .) ~. .. ' ..... /~ ...5 .."~'"" ' "- ? o.5~ .... ~ ':~' ' ' / '" : o=''' o ' !;' ~: , '.' ,, .... ~.. Y'[Sump o - /' ... · o :. .; m.i o ':: //? · .o .Z~I / "' 001 Lo' .,~ L Do ]: ,. o -o ( i' .. /" '-: /.:.. . I " I ./ Lan(Ic~ '," ~ ~' ' · ' "26 o 'i, , oi M,le 21 X . T29S / R27E BAKERSFIELD, CALIFORNIA LEO B~CK E~CTRIC ~ PI~CE ROAD, BAK~S~ELD, C~ 4900' I SCALE IN FEET DATE ~93 I 02~.~,OA I ~HIBIT I 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 LB-11 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: ! ff. 1 ft. I ft. 1 ff. 30 ft. 32 ft. 34 ff. 40 ft. 40 fL 40 ff. 40 fL 40 ff. 40 ff. 40 ff. 40 ff. 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 mg/kg ND ND ND ND ND ND ND ............... Xylenes mg/kg ND ND ND ND ND ND ND .................. Lead mg/liter ~ ............................. Sample Number: LB-18 LB-19 LB-20 LB-21 LB-22 LB-23 LB-24 LB-25 LB-26 LB-27 LB-28 LB-29 LB-30 LB-31 ?:::!!:.ii::i?:::i~i?:ii!!i!. LB-W-1 Sample Type: Soil Soil Soil Soil Soll Soil Soil Soil Soil Soil Soil Soil Soil Soil !:?i!ii!i!::.i:i!:::::?!:::' Water Depth: 25 fL 25 fl. ! 5 fl. 15 ff. 15 ft. I fl. 1 ft. ! ft. I ft. 1 ft. I fL ! ft. 1 fL 1 ft. ================================= 45 ft. .:!:i:!.'::.i:;:i'i'::::i.: ~ Units .... :,::,.::: ::. .......... TPH Gas mg/kg ND ND ND ND ND ND ND ND ND ND ND ND ND ND iiiii!i?ii?iii:::=: 7100 u TPH Diesel mg/kg ...................... ::ii!iiiii!::i!ii!iiii::iii!i!.i: 2300 u Benzene rng/kg ....................... iii?!i::!ii?:i::i !ii!i::: ND Toluene mg/kg ..................... !iiii!iil i=:~iii::i!iiii ii;. ND Ethylbenzene mg/kg ': ..................... ND ......................... ii!:i !!!!!ii:i:i!!:i! ;:i. Xylenes mg/kg ....................... :!i;iii::ii:::.iii:ii::::iiiii= 280 Lead mg/liter ......... 0.84 -- ND -- 1.50 ND - 3.30 0.69 ;i~:~ii:iiiii::i;::!ii .... Oal27/93 Jt(W LE~LACK/EXHIB5 RADIUS SAN JOAQUIN TEXACO REFINERY REFINERY LEO BLACK ELECTRIC 309~ PIERCE ROAD, BAKERSRELD, Bdttan Rd. POWER MACHINERY GulfS£ 3818 PIERCE RD. Get~' St B I DAVIES OIL COMPANY 3505 1/2 GULF ST, ..~ridian Ave. Tum..on Ave. Orin Wy. ASSURED TRANSPORT UNION CARBIDE ~ 3228 GIBSON RD. ~ 3505 PIERCE RD. ~ Gillmore Ave. WZl INC. BAKERSFIELD, CALIFORNIA 0 Fee 1: 2000' LEO BLACK ELECTRIC ~,' " '. , ' ,~i ~°""'~"c~"°~'~"~"~'~'c~'I, , ~ 0 Miles½mi. mi. OFFSITE NEAR BY SOURCES OF 0 Kilometers .50km GROUNDWATER CONTAMINATION Table ! 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: 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 (ft)- (pa) (pct') 1 8/3/93 40 See Site Sketch 1.2 117. I 5.5 119.7 98 2 8/3/93 37 See Site Sketch 2.2 117.5 5.5 I 19.7 98 3 8/3/93 34 See 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 See Site Sketch 7.4 103.2 5.5 119.7 86 1 9 8/3/93 18 See Site Sketch 4.0 102.9 5.5 119.7 86 1 I0 8/3/93 16 See Site Sketch 4.5 113.0 5.5 119.7 94 I 11 8/4/93 14.5 Sec Site Sketch 6.3 111.2 5.5 119.7 93 I 12 8/4/93 13 See Site Sketch 5.7 103.0 5.1 109.3 94 1 13 8/4/93 11 See Site Sketch 5.4 97.9 5.1 109.3 90 1 14 8/4/93 9.5 See Site Sketch 6.9 102.3 6.3 116.4 88 1 15 8/4/93 8 See Site Sketch 3.2 106.5 6.3 116.4 91 1 16 8/5/93 7 See 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 8/5/93 3 See Site Sketch 15.0 105.9 6.3 116.4 91 · 21 8/5/93 2 See Site Sketch 3.7 111.7 6.3 116.4 96 22 815/93 1 See Site Sketch 8.1 109.8 6.3 116.4 94 23 8/5/93 0 See Site Sketch 8.5 108.9 6.3 116.4 94 Page I TABLE II 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 double4etter 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 a v I. (sp) Brown fine to medium SAND with accessory SILT (sp) 116.4 6.3 Pierce Road Existing Depression ence '= 3901 Pierce Road -~, ~ ~..," ? ~ii ,-i' ~: 1 Inch = 20 Feet LEGEND Indicates Location o~ Field Density Test . Indicates Bottom DeDth {Backffill , , : ! I r ' 'il . Indicates Bottom Depth/!~ r~ ¢~=1%' ':: 'iii'' !I "='~,"' ~e~.e~.on~"~ . · , :., !iii ~:'i ,, , ' .. > I ,i' ;':1 ' ' ,: !',i~ ' ::. '"": .... . :..',~ t.::~': ·' · 3901 P~erce Road, Bakersfield~Californlalt., .,': ' .' . LEO BLACK ESTATE M&T AGRA, Inc., ...... Geolechn/cal and Env/>onmanl~l,Seivic~s ~,,:!, Post Office Box --- '--: Bakersfield, Calilornia 93389-9217 CHAIN OF CUSTODY DOCUMENT Job Number: ~'~,~O ~. Attention: .Z/7, ~',~,~,,-r ~,./" ample Type: (check one) . Drl.nklng Water ~ SurfaceWater WasteWater ~ OII ~Sludge. · , _Other (specify) ample Description(s>: .~"'/ ~2 '~" ~ f'~'$'S ~ ~¢'''¢' '~ ~// Sample dlected Collector's Name Type of Analysis I I I I " I I I I I' I I I i ~mpl~ ~linquish~d b~: Tim~: .~ample Received by: Tim~: Post Office Box 7 : Bakersfield, Calilornia 93389-9217 CHAIN OF CUSTODY DOCUMENT Job Number: ~.2c~c. oD / c~ . WT'{ Inc. ~ample Type: (check one) ~ Drinking Water ~ SurfaceWater WasteWater ~ OII oi1' __ Sludge. Other (specify) Sample Number Date Collected Collector's Name Type of Analysis Sample Relinquished by: Time: Date: Sample Received by: Time: D~[~: Sample Relinquished ,o Lab by: y,~/~ -~/......_, ~.~.....~.~ Tim~:.///'.).'.b~"~'' Date: 5amp,. Received in Lab by: ,_, ~X,.~ ,.- Time: Date: Sample Condition When Received Lab: · Tim~: Date: ~b Signature: Time: Date: Post Office Bo× : Bakersfield, Calilornia 93389-9217 CHAIN OF CUSTODY DOCUMENT Job Number: ~"~~, ~r..) / d) WZl Inc. ;ample Type: (check one) __ Drinking Water SurfaceWater __.WasteWater OII ~olI __ Sludge. __ Other (specify) S~mpl~ Number D~t~ Collected Ooll~ctor'~ Nam~ Type of Analysis .... j/ AC_i/ · Sample Relinquished by: Time: Sample Received by: Time: D~,te: Sample Relinquished to Lab by: .~r-~Z~¢ Time: ,-~,'/(-.) P~ate: sample Received in Lab by: ~~~0~, _ _ Time' ~b Signature: -,~ ........ Time: ~.'/~/~ Date: , Post O. ffice Box .~ t · ' Bakersfield, California 93389-9217 CHAIN OF CUSTODY DOCUMENT " Job Number: O,.20¢ ~,o/'D WZI Inc. :ample Type: (c.heck one) ~ Drinking Water ~ SurfaceWater ..WasteWater ~ OII. · - Soll ~ Sludge. , Other (specify) Sample Number I Date Collected Collector's Name Type of Analysis I I JI J . ~-7 ~/' ,. i ~ample Relinquished by: Time: Date: ample Received by: Time: Date: ~ample Condition When Received By Lab: Report, _T°: ·. ~o~ Analysis Requested ,. ~J~. ~'~' , Address: /~' ~ Project~: 'O~C) C Od ~O: '.' City: /~.._ ' ':" Sampler Name: ' State: ~/~ ZiP: Other: AMn: ~J ~ ~ · ' E ~' o La~ Sample Description Date & Time Sampled / / · _.;_. ~ , · "- 1_~' X/ , Relinquished by: (~ignature) ~iv~d~7: (Signature) j ~ , Date: Time: 'Comment: Billing Info: ....... .....;-/.., ' ~ddr~ss ~ · ' )~ ~' S J-, City State Relinquished by: (Signature) Received by: (Signature) ._~ ~ Date: Time: ~ Attention: -Relinquished by: (Signature) Received by: (Signalum) Dale: Time: ~: · Bolinquishod b~: (Si~naturo) ~ocoiwd b~: (Si~naturo) ~ato: Time: ';}, ~, ~ · , Sa~plo ~isposal P.O.~ ~olinquishod b~: {Si~naturo} Bocoivod b~: {Si~natu[o) ' ~aIo: lime: ~ Rotufn~o client Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT ...... RePOrt: 07/29/93 P.O. BOX 121 Lab--~¥~-93o07347-1 WOFFORD HEIGHTS, CA 93285 000-0000 S~mple Description: LEO BLACK PROJECT ~0206.0010 LB-1 SOIL IN BP, ASS %~JBE, SA/~PLED 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 mg/kg 10. California D.O.H.S. Cert. ~1186 Department Supervisor cc: WZI - ~?.?.~.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 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 ~/ETHOD: 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 ~eparrnnent Superwisor 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 ~: 93-07347-3 WOFFORD HEIGHTS, C_A 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 Total Petroleum Hydrocarbons (diesel) None Detected mg/kg 10. California D.O.H.S. Cert. Department Supervisor cc: WZI - ~LLW. N WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/29/93 P.O. BOX 121 Lab ~: 93-07347-4 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 AI~LEN 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 mg/kg 10. California D.O.H.S. Cert. ,=1186 Department Supervisor cc: WZI - AI~LEN 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 OOO-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 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. Department Supervisor cc: WZI '. 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 /%nalysis Collected: Received @ Lab: Completed: 07/28/93 07/29/93 07-31-93 Minimum Analysis Reporting Reporting Const£tuents 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 (diesel) !00. mg/kg 10. California D.O.H.S. Cert. =,1186 Department Supervisor cc: WZI 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 Saarple Description: JOB ~0206.0010 LB-7 (SOIL), SA/~PLED ON 07-28-93 BY A. WAC~NER. 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 430. mg/kg 9. Hydrocarbons (gas) Total Petroleum Hydrocarbons (diesel) 680. mg/kg 100. Note: High reported PQL's due to high hydrocarbon ba6kground~ '" Cal£forn£a D.O.}{.S. Cert. Department ~per~isor 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 Description: JOB %0206.0010:LB-8 (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 Superwisor cc: WZI - ALLEN WAGGONER · '' . - · BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report: 07/30/93 P.O. BOX 12! 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 Dar-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 Supez-visor cc: WZI /%LLEN 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 SAb~PLED 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 - AJ~LEN WAGGONER ' 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-il (SOIL) 07-29-93 SAMPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. ManuaI 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 De~ec~ed mg/kg 1. California D.O.H.S. Cert. ~1186 Deparrnnent Supervisor cc: WZI - A3~LEN 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 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: 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 - A3~LEN 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-13 (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 ® Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum Analysis ReDorting 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 SAbIPLED BY A. WAGGONER TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method o 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 To~al Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. Deparr_ment S~pez-visor 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 ~: 93-07560-8 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-15 (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 ® Lab: Completed: 07/29/93 07/29/93 07/29/93 Minimum 3%nalysis 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 ~: 93-07560-9 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-16 (SOIL) 07-29-93 SA~iPLED 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 mt/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 ~: 93-07560-10 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-17 (SOIL) 07-29-93 SAI~PLED 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 California D.O.H.S. Cert. Department Supervisor cc: WZI - ALLEN WAGGONER OI=~TO~ES BTXE Analysis ESTATE OF LEO BLACK Date of C/O TOM GILBERT Report:, 07/30/93 P.O' BOX 121 Lab ~: 93-07560-11 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-18 (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 07/29/93 Minimum 3%natysis Reporting Reporting Constituents Resu!~s Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. Department Supervisor cc: WZI - ~J~LEN WAGC~DNER 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 DaCe Sample Date Analysis 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. Department Supez-visor 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 5: 93-07560-13 WOFFORD HEIGHTS, CA 93285 Sample Description: JOB ~0206.0010:LB-20 (SOIL) 07-30-93 SAI~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: 07/30/93 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. 51186 Departmen~ Superwisor 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 ~: 93-07560-14 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 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 m~/k~ 1. California D.O.H.S. ,Cert. Department 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 ~: 93-07560-15 WOFFORD HEIGHTS, CA 93285 Sarmple 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 De~ec~ed mg/kg 1. California D.O.H.S. Cert. Department 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. California D.O.H.S. Cert. ,~1186 Depar~nt S~ cc: WZI - A3~LEN WAGGONER Petroleum Hydrocarbons ESTATE OF LEO BLACK Date of C/O TOM GILBERT' Report: 08/19/93 P.O.' BOX 121 Lab $: 93-07981-3 WOFFORD HEIGHTS, CA 93285 000-0000 Sample Description: JOB $0206.0010 LB-24, SAMPLED ON 08-09-93 BY A. WAGGONER. TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Date Sample Date Sample Date Analysis Collected: Received ® Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis ReDorting ReDorting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. 'California D.O.H.S.' Cert..=1186 Depar~t Supez-viso~ . cc: WZI ALLEN WAGGONER )O~TO~E$ Petroleum Hydrocarbons.' ESTAT~ OF L~O BIJkCK Date of C/O TOM GILBERT Report: 08/19/93 P.O. BOX 121 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: TP~ 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.M.S. Cert. ~1186 Depa~-~m~t Super~i~ 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. Department Super~i~ cc: WZI - ~LLEN WAGGONER Petroleum Hydrocarbons ESTATE' OF LEO BLACK Date of C/O .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, SA/HPLED ON 08-09-93 BY A. WAGGONER. TEST ~/ETHOD: 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.. Deparrnn~-'ent SupervisOr cc: WZI AL!.F.N WAGGONER 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 '~ETHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Sample Matrix: Soil Dare'Sample Date Sample Date Analysis Collected: Received @ Lab: Completed: 08/09/93 08/09/93 08/12/93 Minimum Analysis ReDorting Reporting Constituents Results Units Level Total Petroleum Hydrocarbons (gas) None Detected mg/kg 1. California D.O.H.S. Cert. $1186 ."." cc: WZI ALLEN 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 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 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. California D.O.H.S. Cert. =,1186 Depar~-~nt '~upe fyi s or O cc: WZI - /%LLEN 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, SAMIPLED 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~en~ ~upervisor ~ cc: WZI ALLEN WAC=GONER . ~.. 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. 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. c~lifo'rnia D.O.H.S. Cert. ~1186 Depar~e~t- SupervisoO 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.: 93-07981-2 WOFFORD HEIGHTS, CA 93285 000-0000 ~ WET TEST EXTRACT CONTD~_INANTS'ANALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFO.%NIA 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 Constituents mq/liter P.Q.L. Method STLC Lead 0.84 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 ~imit Concentration REFERENCES: ...... -."'-. ............. SW = "Test Methods for Evaluating Solid waste~ Physical/Chemical Methods", EPA-SW-846, September, .1986. Depa~'rnnent Supe~-v~r cc:. WZI ~%LLEN 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 000-0000 WET TEST EXTRACT CONT~INANTS Al~3%LYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMINATION (STLC) Sample Description: JOB ~0206.0010 LB-25, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Constituents mg/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 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'i = Practical Quantitation Limit (refers to the least amount'of analyte detectable ..-. _-i~':..'~'~..._. based on sable 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~ent Supe~'~~ so CC: _..WZI - /~T.LEN 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 EXTP~ACT CONTAMINA!qTS ANALYZED ACCORDING TO TITLE 22, ;%RTICLE 11, CALIFORNIA CODE OF REGNILATIONS FOR HAZJIRDOUS WASTE DETERMINATION (STLC) Sample Description: JOB $0206.0010 LB-27, SAMPLED ON 08-09-93 BY A. WAGGONER. Regulatory Sample Results Method Criteria Constituents 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 results are based on extractin9 sample accordin9 to Title 22, 31rticle 11, California Administrative Code usin9 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). sTL~-'~' = Soluble Threshold Limit Concentration -' SW = "Test Methods for Evaluatin9 Solid Wastes' PhYsical/Chemical Methods", '' EPA-SW-846, September, 1986. 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 AIq3%LYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFOR/~IA CODE OF REGULATIONS FOR HAZARDOUS WASTE DETERMiINATION (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: 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-q~en~ Supervis~ cc: WZI - ~%LLEN 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.: 93-07981-9 'WOFFORD HEIGHTS, ~ 93285 000-0000 " WET TEST EXTRACT CONTAMINANTS AB%ALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS W;%STE DETERMINATION (STLC) Sample Description: JOB ~0206.0010 LB-30, SA~IPLED 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: 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 analy~e detectable ...... ~ ........ based on sample size used and analytical technique employed). STLC = Soluble Threshold Limit Concentration REFERENCES: SW = "Test Methods for Evaluating Solid Wastes Physical/Ch'emical Methods", EPA-SW-846, September, ~986. Depar~en~ ~ cc: WZI - ~r,~,EN 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.: 93-07981-1 WOFFORD HEIGHTS, CA 93285 000-0000 WET TEST EXTP~ACT CONTA~/INA/qTS A/%IALYZED ACCORDING TO TITLE 22, ARTICLE 11, CALIFORNIA CODE OF REGULATIONS FOR HAZARDOUS 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 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 aunalytical technique employed). STLC = Soluble Threshold Limit Concentration ..... · ...... REFERENCES: SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods", EPA-SW-846, September, 1986. ' ' '' . Dep~n~nt Supez-v~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. '-...~ Sample chromatogr~m not typical of diesel. California D.O.H.S. Cert. ~1186 ." ." ".~ Department Superwisor cc: WZI -' ':" ': !' :- ' 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. '..~ .~ Sample ~.ronm. togram not typical of diesel. California D.O.H.S. Cert. ~1186 Department Supervisor CC: WZI '""-' ' ' i'~:. """: ' APPENDIX III HEALTH AND SAFETY PLAN APPENDIX III SITE HEALTH AND SAFETY PLAN !. 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 not described in the Scope of Work become necessary, all work shall stop pending an 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:' Project 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 and Equipment 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 Proiect 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 Descri_otion: 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 of a former underground storage tank release. Approximately 1,000 cubic yards of hydrocarbon contaminated soil will be remediated by bioremediation and controlled aeration. Remediated soil will be placed into the excavation along with the additional clean fill, compacted. Excavation will be filled to the ground surface. 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 Soft APPENDIX III 02060010.019 5 Physical A,qents; 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 Agents 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 4. Groundwater Quarterly 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 1. Site Background Investigation N/A 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 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 (OVM). 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 throughout the site, the exclusion zone shall be defined around the area(s) 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. Suppo~ 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 Monitoring Direct-Reading Air Monitoring Instruments The follow direct-reading instruments are available for field work (check all that apply): Or.qanic 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 VVZl Inor,qanic Gases: Hydrogen Sulfide Detector Hydrogen Cyanide Detector Combustible Gases, Vapors, and Oxy,qen Detector Combination Combustible Gas / Oxygen Detector, (calibrated to the combustible gas or vapor expected). Ionizinq Radiation Geiger-Mueller counter capable of detecting alpha, beta, and gamma radiation. U. S. EPA Direct-Readinq Air Monitoring Instrument Action Levels and Actions for Hazardous Waste Operations Monitoring Results (Action Level) Action Total Or,qanic Vapors: 0 pprn or "background" (BG) Level D PPE Above BG to 5 ppm 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 - Inor.qanic Gases (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 Oxygen 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 ~1 IHC Site Specific Air Monitorinq Equipment and Procedures Air Monitoring Where Frequency Action Instrument Contaminants Monitored of Monitorinq 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 Sampling 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 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 ill 02060010.019 17 I_ Record Keepin_cl 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 ~1 INC 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 Appficable APPENDIX III 02060010.019 19 X. EMERGENCY CONTINGENCY PLAN Attach Map Showing Evacuation Route from Site to Nearest Hospital Attached Emerqency Telephone Numbers Ambulance 911 Fire 911 Police 911 Emer.qency Alarm and Communication Procedures 1. Hand signals shall be developed before site work begins to communicate at a distance in noisy areas. 2. Radio communication with emergency teams. Emergency evacuation and equipment shutdown procedures must be developed, understood, and rehearsed by all site personnel before project work begins. Emerqenc¥ Evacuation Procedures 1. Shut all equipment down. 2. Evacuate site upwind. 3. Meet at safety point. 4. Determine status of personnel 5. Advise authorities/WZI as appropriate. APPENDIX III 02060010.019 20 ~1 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 Icg 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 bacldilled 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 bacldilled with a cement and sand slurry containing no more than five percent bentonite. The cuttings 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 ~1 INC 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. 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