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Home My WebLink AboutUNDERGROUND TANK 1 (2)-ADVANCED ENVIRONMENTAL CONCEPTS INC- February 17, 1994 Ms. Flora Darling Kern County Environmental Health Services Department 2700 "M" Street, Suite 300 Bakersfield, California 93301 Regarding: Environmental Site Assessment Report Chico and the Man Service Station 231 East 18th Street Bakersfield, California Dear Ms, Darling: Advanced Environmental Concepts, Inc. (AEC] has prepared the Environmental Site Assessment Report for the above referenced project/location. Enclosed please find that report, which AEC is submitting for review. Should you have any questions or require clarification on any aspects of the enclosed, please do not hesitate to contact our office at (805] 831-1646. Respectfully yours, Advanced Environmental Concepts, Inc. /' ... D~'E~bf'e Irwin " ............... P.r. oj~ct Coordinator / Off~ce Admimstrator Attachments: Report (1] Distribution: 1/Addressee -REG MAIL 11 Mr. Gene Bolton 1/Bksfld File · Ef'~IVI¢tO~*JMEi"Ii'^L COt'~CEPTS WITH DESIGt,J IN MltqO · 44f~OASHEROAD.#206 * BAKERSFIELD CA.a, 3313 805/831-IR,16 · FAX RPR!R;:~! I//! -ADVANCED ENVIRONMENTAL CONCEPTS INC- Advanced Environmental Concepts, Inc. is pleased to present the following: Environmental Site Assessment for Chico and the Man Service Station 231 East 18th Street County of Kern · Bakersfield, California This report has been prepared for: ' Gene Bolton, Pro-Tech Specialties January t994 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA93313 805/831-1646 · FAX805/831-1771 Environmental Assessment Report Advanced Environmental Concepts. Inc. Table of Contenls 1.0 INTRODUCTION 2.0 BACKGROUND 3.0 SITE CHARACTERISTICS 3. I Site Description 3.2 Regional Geolagy 3.3 Local Geology 3.4' Hydrogeology 4.0 ASSESSMENT ACTIVITIES 4, '1 Decontamination Procedures 4.2 Soil Borings 5.0 ANALYTICAL RESULTS 6.0 FEASIBILITY STUDY 6.1 Soils 6.2 Extent of Hydrocarbon Migration 6.3 Remediation Alternatives 7.0 CONCLUSIONS 8.0 RECOMMENDATIONS 9.0 LIMITATIONS I0.0 CLOSING Pacle I 1 2 2 3 3 3 3 3 4 4 5 5 5 6 7 8 8 Appendices: [A] (B) lC) Project Maps/Figures Boring Logs Laboratory Reports/Chain-of-Custody Documents Roject: AEC 94C-14ti · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 · BAKERSFIELD. CA93313 805/831-1646 · FAX805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 1.0 INTRODUCTION This report presents the results of a soil investigation conducted by Advanced Environmental Concepts, Inc. [AEC] to estimate the extent of hydrocarbon impacted soil resulting from the unauthorized discharge of gasoline, identified following the removal of four [4] underground storage tank lUST] and associated plumbing. The UST was located at the Chico and the Man Service Station, 3t5t East 18th Street, Bakersfield, California [Appendix A, Figure t]. The project was performed on December 22, 1993, in accordance with the work plan previously designed and submitted by AEC and appraved by the Kern County Environmental Health Department [KCEHD]. This investigation was authorized by Mr. Gene Bolton of Pro-Tech Specialties, representing Mrs. Nelsien the property owner, and conducted under the direct supervision of Ms. Flora Darling, Hazardous Materials Specialists, Kern County Environmental Health Department [KCEHD}. The subject site is located In east Bakersfield. The general area Is comprised of light Industries, retail stores and related Service businesses. Contained in this report is background information regarding existing site characteristics, regional and local hydrogeological profiles, and the project history. Also included in the following sections are the objectives and scope of investigation, detailed investigative procedures, and subsequent findings. Finally, AEC provides an evaluation of said findings and makes related conclusions and recommendations. The report appendices contain project maps and figures [Appendix A), soil baring logs [Appendix BI, laboratory reports/chain-of-custody documents [Appendix C], and cross- sections depicting the horizontal and vertical extent of hydracarbon migration [Appendix D). 2.0 BACKGROUND On April 21, 1989 Valley Tree Construction supervised the excavation, removal, and disposal of four (4] gasoline UST's from the subject site. Very strong gasoline odors were noted in the soil during the excavation procedures. Former tank locations and sample locations are presented on Figure 2 [Appendix A). The analytical results of soil samples collected from below the removed UST are presented in Table I. Units are in milligrams per kilogram [rog/kg] which are equivalent to parts per million (ppm). Table I Analytical Results - Soil Samples Tank Removal 4121189 [ppm] Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene TH-I-2' TH-t-6' TH-2-2' TH-2-6' ProJeol: AEC 94C-t4ti 6900 310 920 1210 220 5600. 2t0 690 1085 190 4300 150 550 670 140 7000 230 930 t520 280 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CAg3313 805/831-1646 · FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. Table t (continued] Analytical Results - Soil Samples Tank Removal 412tl89 (pprn) Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene TH-3-2' 5000 85 490 '1230 2'10 TH-3-6' 2500 ~ 5 ~ 00 472 70 TH-4-2' ND ND ND ND ND TH-4-6' ND ND ND ND ND TH-5-2' ND ND ND ND ND TH-5-6' ND ND ND ND ND TH-6-2' ND ND ND ND ND TH-6-6' ND ND ND ND ND TH-7-2' ND ND ND ND ND TH-7-6' ND ND ND ND ND TH-8-2' ND ND ND ND ND TH-8-6' ND ND ND ND ND TH-9-2' ND ND ND ND ND TH-9-6' ND ND ND ND ND Detection Limit: '1.0 2.0 2.0 5.0 2.0 ND: Non-detected TPH-g: Total Petroleum Hydrocarbons as gasoline Based on these results, KCEHD required that a site assessment evaluating the lateral and vertical extent of hydrocarbon impacted soil be performed. 3.0 S[I'E CHARACTERISTICS The following sections summarize the project site features and conditions along with regional and local geological and hydrological characteristics. 3. t Site Description The Chico and the Man Service Station is located on the southwest corner of the intersection of East ,18th and Sonora Streets, in Bakersfield, California. The general area is comprised of light industry and related services. The subject site is at an average elevation of 385-feet above mean sea level with minimal topographic relief. The property is presently a vacant lot. Project: AEC 94C-t444 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD CA93313 805/831-1646 - FAXS05/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 3.2 Regional Geology The subject property is located in the Southern San Joaquin Valley [Valley] which is a part of the Central Valley of California. The Valley forms the southern ~o-thlrds of the Central Valley and is characterized as a broad structural trough. It is bordered on the east by the Sierra Nevada Range and on the west by the Coast Range [Diablo and Temblor Mountains]. The Valley extends 250 miles southeastward from the confluence of the San Joaquin and Sacramento Rivers to the Tehachapi and San Emigdio Mountains. The width ranges from 25 miles wide near the Kern River to approximately 55 miles wide near the Kings River, with an approximate average width of 40 miles. Geology of the southern Valley consists of a Pre-Tertiary basement complex overlain by marine and non-marine sedimentary rocks of Tertiary age. These rocks are composed of consolidated sandstones, siltstones and shales which thicken from northeast to southwest. The Valley was once an inland sea of comparatively shallow depth that continued to subside due to the ever increasing load of sediments transported and deposited from higher elevations. These deposits consist of gravels, sands, silts and clays. The majority of the groundwater pumped from the Valley floor occurs within these relatively unconsolidated continental deposits. 3.3 Local Geology The investigated property is located on alluvial deposits, created from sediments transported and deposited by local streams, and during flood stages of the Kern River. The site is situated in a Iow to moderate energy flood plain environment consisting of weakly consolidated to unconsolidated, poorly bedded sands and silts. 3.4 Hydrogeology Ground and surface water in the central Bakersfield area is regulated by the Kern County Water Agency. According to the Kern County Water Agency "Water Supply Report-1990", depth to groundwater in unconfined and equivalent wells is estimated at 180-feet below grade level [BGL] at the site. No perched water bearing zones are reported in the area. 4.0 ASSESSMENT ACTIVITIES 4. t Decontamination Procedures Prior to initiating drilling operations, the augers and associated drilling equipment were thoroughly cleaned using a high pressure steam cleaner. In addition, the soil sampler and hand auger were washed in an Alconox solution and double rinsed in clean, deionized water prior to initial use and between each sampling interval to minimize the possibility of cross-contamination between samples. Projecl: AEC 94C-1411 3 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MINO · 4400 ASHE ROAD. #206 ,, BAKERSFIELD. CA 93313 805/831-1646 * FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 4.2 Soil Borings On December 12, 1994 four (4] soil borings (B-l, B-2, B-3, and B-4) were drilled on the subject property. The borings were advanced using a truck-mounted Mobile B-61 drill rig, equipped with 8-Inch O.D. continuous flight, hollow-stem augers. Borings I, 2, and 4 were drilled to a total depth of 60 feet BGL and boring 3 was drilled to 30 feet BGL. The borings were positioned to evaluate the vertical and horizontal extent of the hydrocarbon migration. Soil samples were collected at Intervals of 5-feet in all borings commencing at 10-feet BGL. Samples were obtained by driving a thin-walled steel sampler, equipped with three {3) 2.5-inch x 6-inch brass sleeves, a minimum of 18-inches into previously undisturbed soil. The sampler was driven ahead of the augers using a 140- lb. slide hammer with a 30-inch vertical fall. Following each sample drive, the sampler was withdrawn from the borehole and the three [3) brass sleeves were removed. The bottom sleeve was retained for laboratory analysis and prepared by placing teflon tape and plastic caps over each end, then securing the caps with duct tape. The samples were labeled, placed in sealable plastic bags, recorded on a Chain-of-Custody document and placed in an ice chest cooled with blue ice. Soil exposed at each end of the center brass sleeve, and the cuttings, were examined for lithological purposes and for any obvious evidence of hydrocarbons. Lithologic descriptions (Appendix BI were logged according to the Unified Soils Classification System [USC, S]. Chain-of-Custody protocol was strictly followed to ensure sample integrity and traceability. Upon completion of the above described procedures, the borings were abandoned with hydrated bentonite followed by a cement slurry to grade. 5.0 ANALYTICAL RESULTS Selected soil samples were submitted to Associated Laboratories, Inc., of Orange, California and analyzed for total petroleum hydrocarbons as gasoline ['rPH-g] and volatile aromatics [BTXE] using CA DHS and EPA 8020 method, respectively. The analytical results are presented in Table 2 and the laboratory reports and Chain-of Custody are provided in Appendix C. Units are in milligrams per kilogram [mg/kg] which are equivalent to parts per million [ppm]. TABLE 2 Analytical Results - Soil Borings t 2/t 5/93 [ppm) Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene BI-20 ND ND ND ND ND Bt-30 ND ND ND ND ND B1-40 11 0.80 2.0 0.93 0.11 Bt-50 13 ND ND ND ND B1-55 19 0.08 0.15 0.06 ND BI-60 ND ND ND ND ND Project: AEC 94C-1411 4 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND ,4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. TABLE 2 [continued] Analytical Results - Soil Borings t 2115/93 [ppm} Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene 82-'15 4300 ND 2.2 380 4.3 82-25 2600 0.20 35 300 40 82-30 9800 45 9'10 '1400 250 82-35 2700 2.7 '130 350 55 82-40 '14000 ~ 90 '1500 2000 370 82-45 39 0.23 2.0 3.4 0.56 82-50 4.6 ND 0.85 0.20 ND 82-55 '10 0.08 0.02 0.'10 0.0'1 82-60 '15 ND ND ND ND 83-20 42 ND ND ND ND 83-30 2700 '12 200 340 56 84-30 70 0. '1 '1 '1.5 '1.3 4.4 84-50 '16 ND 0.0'1 0.039 ND 84-60 '17 0.02 0.'~ 0.'16 0.02 D.L.[mg/kg] 4.0 0.005 0.005 ND: Non-detected at indicated limit of detection D.L. Detection Limit 0.005 0.005 6.0 FEASIBILIIY STUDY 6.'1 Soils The soil profile at the site consists of silty sands, "clean" sands, and paorly sorted sands to a total drilled depth of 60 feet BGL. The silty sands [SM-ML) are commonly tan-brown, slightly to very compact, commonly friable, and slightly to moderately moist. The "clean" sands [SW) are olive gray-buff, moderately dense, unconsolidated, and slightly moist. The poorly sorted sands [SP-GC) commonly consist of olive-gray to white, moderately to very dense, unconsolidated to very consalidated, and slightly maist. The sediments are typical of Iow to moderate energy fluvial deposits subjected to periodic reworking during flood stages. The strata were loosely compacted due to the increasing weight of the overlying sediments. 6.2 Extent of Hydrocarbon Migration Analytical results indicate that significant hydrocarbon concentrations extend to a depth of 45 feet BGL with the highest concentration, '14,000 ppm, being detected in B-2 at 40 feet BGL. Hydrocarbon levels below '100 ppm were detected in B-'1 and B-4, and below Project: AEC 94C-14t t 5 ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD, #206 · E~AKERSFIELD. CAg3313 805/831-1646 · FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 40 feet BGL in B-2. Plume dimensions are approximately 60 feet deep by 60 feet wide and forms an nonsymetric, elongated, spheroid shape that occupies approximately 6,200 cubic yards. The highest concentrations of hydracarbans are contained within about 785 cubic yards. 6.3 Remediation Altematives Advanced Environmental Concepts, Inc. recommends the following three (3] remediation alternatives for treatment of the hydrocarbon contamination located at the subject facility: I) No-action alternative; 2] Implementation of an in-situ vapor extraction system; and 3) In-situ bioremediation of the impacted soil. Allemcrlive The no-action remediation alternative invOlves leaving in place, the soils that exhibit hydrocarbon levels in excess of RAL, then capping the contaminated area with a relatively impermeable layer of asphalt or concrete. This alternative would require approval of the Kern County Environmental Health Department. To be eligible for this remediation alternative, the site location must satisfy specific parameters associated with depth to groundwater, site geology and contaminant concentration levels. It is unlikely that this facility will be eligible for this alternative in that the site does not satisfy the following criteria based upon the "Leaching Potential Analysis- gasoline" as outlined in the LUFT Manual: (a) Groundwater depth is estimated at 180-feet BGL [I0 points] [bi No discernible fractures [I0 points) [c) Average annual precipitation is less the 10-inches (5.72) (10 points] Id] No available man-made conduits [10 points] (e) Coarse grained soil ( 9 points] There is a total of 49 points scored which correlates to the following maximum allowable levels of gasoline-range hydrocarbans that can be left in place; 1,000-ppm and 1/50/50/50 for TPH and BTXE constituents, respectively. The hydrocarbon concentration levels found at the subject site exceed these limits to a depth of 45-feet in soil boring Alternative ~2: The vapor extraction alternative involves the withdrawal of the volatile organic constituents from the soil matrix via a vacuum pump manifolded to extraction wells, and the subsequent destruction or collection of hydrocarbons using a regenerative thermal oxidizer or carbon adsorption. This system operates on the principle that volatile organic compounds have relatively high vapor pressures and will volatilize at ambient soil temperatures provided a reduction in pressure is applied. The treatment Project: AEC 94C-t411 6 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 " BAKERSFIELD. CA 93313 805/831-1646 ,, FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. at the subject site would also involve injecting air into the perimeter wells to enhance the volatilization of the diesel-range hydrocarbons while oxygenating the soil and promoting natural bio-degradation. Vapor extraction is most effective and efficient in coarse grained soils (SP), alihough soils classified as ML [silt} also have the capability of being treated by this method. Because hydrocarbon vapors are generated by the removal process, an air emission recovery system will be required by the local Air Pollution Control District [APCD] if the hydrocarbon concentrations exceed allowable emission levels. The soil venting system is also most effective on hydrocarbons with high vapor pressures. The advantages of this treatment alternative include the ability to treat the soil in-situ, ease of installation and manifolding of the extraction wells, minimal maintenance, relatively rapid reduction In hydrocarbon concentrations, and minimal disruption of normal site operations. Alternative ~3: Bioremediation involves treating the' impacted soil either aboveground or in-situ. The aboveground treatment alternative involves excavation and surface treatment of the affected soil and is more time-efficient and effective than the in- situ method. However, this discussion will center on the in-situ method because the depth of gasoline impacted soil and the proximity to the warehouse negates an excavation alternative. The in-situ treatment method involves introduction of microbes and nutrients to the contaminated soil via injection wells screened across the affected intervals. A mixing tank is placed above the well and hydrostatic head pressure allows continual percolation of biologically active fluids through the contaminated zones. The soil type is primarily a sand or silty sand and would be receptive to an active biological treatment method. However, intervals of consolidated sand are also present, which could impede the lateral migration of the microbes. To offset this effect it would be necessary to install a tight injection well pattern, which increases the treatment cost per cubic yard. 7.0 CONCLUSIONS On the basis of our investigation, AEC presents the following conclusions: a} The soil profile at the subiect site generally consists of interbedded sands and silts to the total drilled depth of 60 feet. b) The analytical results indicate elevated levels of TPH-g and BTXE to a total depth af 40 feet in B-2 and B-3. TPH-g and BTXE levels are below the PAL far gasoline in soil in all other samples analyzed. c] The vertical extent of the gasoline migration appears to extend to a depth of 60 feet BGL. The lateral extent of the plume is about 60 feet. The approximate volume of the plume is 6,280 cUbic yards and extends underneath a large portion of the site and probably the adjoining streets. Project: AEC 94C-t4t t 7 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400ASHEROAD.#206 * BAKERSFIELD. CA 93313 805/831-1646 · FAX S05/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. d] e] The soils containing elevated levels of TPH and BTXE are separated from groundwater by approximately t40 feet. It is unlikely that groundwater is currently threatened by this unauthorized release. 8.0 RECOMMENDATIONS Based upon the levels and volume of gasoline-range hydrocarbons and the found in the coarse grained soil, Advanced Environmental Concepts, Inc. recommends that the vapor extraction alternative be implemented at this site. 9.0 LIMITATIONS This work has been performed in accordance with generally accepted environmental science and engineering practices. The soil samples for this project were obtained on a finite grid as directed by the on-site regulatory agency representative, hence the analytical results are indicative of discrete samples and are not meant to be misconstrued or representative of unsampled subsurface areas. Conclusions and recommendations are based upon information collected and compiled during this investigation. No other warranty, expressed or implied, is given. Project: AEC 94C-t4tt 8 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSI='IELD. CA93313 805/831-1646 * FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. t0.0 CLOSING Advanced Environmental Concepts, Inc. appreciates the opportunity to be of service to Mr. Gene Bolton on this project. If there should be any questions or additional information required regarding this report, please do not hesitate to contact our office at [805) 831-1646. This Environmental Site Assessment has been prepared by: Advanced Environmental Concepts, Inc. alifornia Registered Geologist #5504 This Environmental Site Assessment has been reviewed by: I Pr/bject Hydrogeologist V~alifornia Registered Environmental Assessor #1508 DOCZZBX Project: AEC 94C-1411 9 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4.400 ASHE ROAD. #206 * E~AKERSFIELD. CA 93313 805/831-1646 · FAX 8051831-1771 Advanced Environmental Concepb. Inc. · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · KERN SrAOIUM I ! AEC ,^,. Chico and the Man Service Station 231 East 18th Street ADVANCED ENVIRONMENTAL CONCEPTS P,O. BOX 40672 BAKERSFIELD, CA 93384 County of Kem· Bakersfield, CA EAST 18th STREET ~ / ......... ~-..o,- ,~- - -- ? ! FORMER TANK PIT ~ ~ m i "T"-I '''/ TH-2 j TH-1 SAMPLE I.D. ~ ............................................................................................ ~ SAMPLE L~ATION > SCA~ 231 East 1 ~h Street ADVANCED ~RONME~AL ~NCEP~ P.O. 80X ~X~ 8AKERSRE~, CA 9~ ~un~ of Kern · B~ersfield, CNEomia E. 18th STREET BUILDING B3 VACANT LOT · B1 SOILBORING I. O. · SOIL BORING LOCATION / /JEff'~ -Soil BoringM~nLOCation Map- FIGURE i · ~ Chico and the Service Station 231 East 18th Street ADVANCED ENVIRONMENTAL CONCEPTS P.O. BOX40672 BAKERSFIELD, CA 93384 County of Kern · Bakersfield, Calffomia · · / E. 18th STREET BUILDING / VACANT LOT -----= · · ~o,.~o~,~.oo~,o~ 1" - 10' Areal View ' -'"' Chico and the Man Service Station 4 231 East 18th SITeet ADVANCED ENVIRONMENTAL CONCEPTS P.O. BOX40672 BAKERSFIELD, CA 93384 County of Kern · Bakersfield, California I NORTH O O SOUTH A' A l B4 B3 B2 BI ^~.ox,~ ^. ,~ o~.o~^. ~.u~ ,,..,,,,, ,,,,,,,,,,'~oo \ ,,,,,,,,'""'"'"'"'"'"" 1~ ~ ,,,,,,,,,,,,,,,,,,,,,,,,,'"'"' ~, ~ ~//////////////////~ ~//~,~ ~ , ,~ ND 30' '" ,- 70 2__ 16 ZONEOF>I,000ppm 4.6 .-- '--~ 13 --- 50' 10 --- 19 ~. lipiltli.II N. 17 1R ...~,,...,,,,,,,, ---- ND --- 60' T' ~6~'..~..'...~.~..~"~...~"~"".~.~.~....~...~"....~......~.~...."~"."....~.~".~....~.~.~..~r- ~o' S TPH~g IN PPM 140OO = I ---- ND = NON DETECABLE SCALE I / ~f~ - Cross Section A- A' - FIGURE Extent of Hydrocarbons - TPH-g i ~ Chico and the Man Service StaUon 5 ADVANCED ENVIRONMENTAL CONCEPTS 231 East 18th Street P.O. BOX40672 BAKERSFIELD, CA 93384 County of Kern · Bakersfield, California I Advanced EnVironmental Concepts. Inc. BORING LOGS "" .. · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · WELL DEPTH PID ~RVAL LI~ LOGIC DESCRIPTION DETAIL (ppm) 8~VCOUNT LOG _. -- 5 -- o GRAB SILTY SAND (SM): Dk yell bm, fn- cae, hrd, 60% sand, 40% fines, SM moist, no odor. -- 10 -..- o e I sP POORLY GRAOED SAND (SP): Yell Bm, fn-med grained, __ 11~ subang-submd, hard, medium dense, homo, moist, no odor. 15 m 15 -- o 22I SP SAME AS ABOVE ~ 20 ~ o 12 [] SP SAME AS ABOVE 3O 25 "-- soo 14 · SP SAME AS ABOVE 18 25 ~ 30 ~ 7oo 10 B SANDY SILT (MI.): Gm-blu, verystlff, 60% 18 ML fine grained, Iow plastic, no dry strgh, 40 % hydroca~x~ o~x. AEC =wcEoE~w. oNM vr, .co vc= = WELL/BORING LOG lof2 P.O. BOX 40~7£ BAKERSFIFI_D= CA 93384 PROJECT _Chleo and the Man / Gone Bolton LOCATION 231 E. 18thStmet, Bakersflekl, Cellfomla WEI.LJBORING NO. a-1 SURFACE ELEVATION WELLHEAD ELEVATION DATE DRIH r=O 12/15/93 LOGGED BY J. Dunwoody REVIEWED BY J. DUNW_~DY __ DRIMJNG COMPANY S B & S Drlllln_¢l Company DRILLER Vem_Sm~h METHOD __I-~__LLOW_S__TE~_A__UGER~__ BORE HOLE DIAMETER 8 INCH TOTAL DEPTH 60' DEPTH TO WATER: INmAL N/A STATIC CASING TYPE DIAMETER SCHEDULE INTERVAL N~A TO ...... _N/A. ......... SCREEN TYPE DIAMETER SLOT SIZE INTERVAL N/A .TO N/A FILTER PACK TYPE INTERVAL N/A TO __ _N/A_ SURFACE SEAL TYPE Cement sand slurry over bentonite INTERVAL NIA TO NIA NOTES WELL DEPTH PID ~i~4PLE ~O U.S.C.S. DETAIL (ppm) ~3~LN-i- LOG LI LOGIC DESCRIPTION --- WELL GRADED SAND (SW): Yelkbm, flne-cse grained, hard, subeng-subrnd, mod dense, homo, hydrocarbon odor. -- 35~ 70o 10 · sw 18 25 --40m soo I 11 SAME AS ABOVE 18 · ML SILT ~NITH SAND (ML): Dk yell-bm, hard, 20% sand, fn-cse, homo, 50 ~' soo 21 I WELL GRADED SAND (SW): Redlshbm, fn-cse gralnedd, 50 SW subang-submd, very dense,homo, moist, mod hydrocarbon odor. ~ 55 ~ 220 12 · SW SAME AS ABOVE lO 60 ~ o 20 · T. D. Drilled 24B SM/ML SILTY SAND/SANDY SILT (SM/ML): Reddish 60 Feet So bm-dkyeilbm.dnese/hard, 50% fines. 50% sand, fn-med, homo, no 65-- AEC co~c t,r WELL/BORI NG LOG ~ROJ£OT Chl~o ~nd th~ ~n I Gon~ 8olton LOCA?IO~ ~'1 fi. 18th ~, B~k~{i~ld, ~li[om18 WEII.ffiORI~O ~O. ~- 1 WELL DEPTH PID ~RVAL U.S.C.S. DETAIL (ppm) E~OWCOUNT LOG LI LOGIC DESCRIPTION SILTY SAND (SM): Dk yell bm, fn- cse. hrd, 60% sand, 40% fines, -- 5 -- 0 SM moist, no odor. GRAB -- 10 -- 150 20 · sP POORLY GRADED SAND (SP): YelI Bm, fn-medgra]ned. 25 suban~submd, hard, medium dense, homo, moist, no odor. 18 -- 15 l~:X) 19 ~ SP SAME AS ABOVE 26 -- 20 -- 2500 26 SP SAME AS ABOVE SP SAME AS ABOVE -- 25 -- 2soo 4s -- 50 SANDY SILT (ML): Gmblue - gry, ve~ stiff, Iow plastic, -- 30 -- 2500 27 ~ ML no dry stmtgh, 60% fines, 40% sand, flne-rned grelnod, 25I poorly srtod, homo, moist, organics, strong hydrocaHxm odor. AEC ADVANCED ENVlRONMENTAL CONCEPTS WELL/BORING LOG 1 of 2 P.O. BOX 4067E BAKERSFIELD, CA 93384 PROJECT ChleoandtheManlGoneBolton LOCATION 231E. 18thSIreet, Bakerslteid, Cellfomla WELL/BORING NO. 8-2 SURFACE ELEVATION WELLHEAD ELEVATION _.._~A DATE DRtl[ FO 12/15/93 LOGGED BY J. Dunwoody REVlEW~_D BY J. DUNWOODY DRILLING COMPANY S_B & S Dfllllr~ Company DRILLER ___Vem~Smllh METHOD HOLLOW STEM AUGER____ BORE HOLE DIAMETER 8 INCH TOTAL DEPTH 60' DEPTH TO WATER: INITIAL NIA STATIC_.N/A CASING TYPE DIAMETER SCHEDULE INTERVAL N/A --TO ....... _NJA_ ......... SCREEN TYPE DIAMETER SLOT SIZE INTERVAL NIA -TO -- NIA FILTER PACK TYPE INTERVAL N/A TO ....... _NlA ....... SURFACE SEAL TYPE Cement sand slurry over bentonite INTERVAL N/A TO NOTES WELL DEPTH PID ~PLE IDI U.S.C.S. -.~ ~RVAL LI LOGIC DESCRIPTION DETAIL (ppm) BLOWCOUNT LOG WELL GRADED SAND (SW): Yait-brn, fine-cse grained, hard, subang-subrnd, med dense, homo, hydrocarbon odor. ~ 35~ 2S00 38 · SW ~ 40 m 1900 39 · SW SAME AS ABOVE 51 ~ 45 ~ 2SO0 29 · ML SILT WITH SAND (ML): Dk yail. bm, hard, 20% sand, fn-cse, homo, ~ 50 m 2300 39 I WELL GRADED SAND (SW): Redlshbm, fn-cse grained, 48I SW subang-submd, very dense, homo, moist, mod hydrocarbon odor. ~ 55 ~ 220 29 I SAME AS ABOVE 35I SW 60 ~ 0 ~ SILTY SAND/SANDY SILT (SM/ML): Redish T. D. Drilled 29I bm-dkyailbm,dnese/hard, 50% fine.% 50% sand, fn-med, homo, no 60 Feet 35 SM/ML odor. -- 65 AEC .,ov.,~cEo ENVIRONMENTAL CONCEPT WELL/BORING LOG 2 of 2 P.O. BOX40672 BAKERSFIELD, CA 93384 PROJECT Chico and the Man / Gene Bolton LOCATION 231 E. 18th Street, Bakersfield, California VVELI./BORING .O. a-2 ~MP~ ID U.S.C.S. WELL DEPTH PID ~RVAL LI LOGIC DESCRIPTION D~AIL (ppm) ~cou~ i LOG SILTY SAND (SM): Dk yell bm, fn- me, hrd, 60% sand, 40% fines, _. ~ 5 ~ o GRAB SM mol~, no ~or. m 10 ~ o 18 ~ SP pp P~RLY G~DED SAND (S~: Y~ ~, ~ greln~, --- ~5I subang-submd, hard, medium der.~e, homo, moist, no odor. --- 15 -- 0 ~2 i 16I SP SAME AS A~ ~ · SP SAME AS ABOVE __ 31 25 ~ 25oo 28 · sP SAME AS Aao~ 32 ~ ~ 25~ ~ SANDY SILT ~: Gm~ue - g~, ~ s0ff, ~ pl~ T, D. ~11~ ~I ML no d~ ~gh, ~% fines, ~% ~, flne-m~ gr~, ~ Feet -- ~ ~ ~, ~n~, ~, ~, ~ hyd~n ~r. AEC CONC= ,= WELUBORING LOG P.O. BOX 40872 BAKERSFIELD, CA 93384 P~ECT. Ch~and~eMan/Gene~on L~A~ON ~lE.l~,~,Cellfomla ~BORING NO. B-3 SURFACE E~A~ON ~~ E~ATION ~A DATE DRP~FD 1~1~3 L~GED BY J. ~ R~D BY J. DUO. DY DRI~NG COMPANY S B & S ~llln¢~ ~mpany DRI~ ~em Sm~ M~OD HO~OW S~M__A__UGER~ ~RE HO~ DIAM~R 8 INCH TOTAL DE~ $0' DEP~ TO WA~R: INI~L NIA STATIC CASING ~E DIAM~R, SCHE~ I~RVAL ~A TO ____N~A_ ...... SCREEN ~PE DIAM~R SLOT S~ I~ERVAL NIA TO ..... _N!A_ ...... FILTER PACK TYPE I~RVAL NIA TO _N[A_ .......... SURFACE S~L ~PE. ~ sand $~ over ~nton~® I~ERVAL ~A -TO-----N../.~ ............. NOTES PID I~'ERVALID U.S.C.S. LIT~LOGIC DESCRIPTION WELL DEPTH LOG DETAIL (ppm) BLOWCOUNT ~ 5 ~ 0 SM SILTY SAND (SM): Dk yell bm, fn- cse, hrd, 60% sand, 40% fines, GRAB moist, no odor. ~ 10 ~ 0 22 sP m POORLY GRADED SAND (SP): Yell Bm, fn.med grained, 25 subang-submd, hard, medium dense, homo, rno~t, no odor. ~ 15 -- 0 sP 35 SAME AS ABOVE ~ 20 ~ 0 28 SP 35 I SAME AS ABOVE ~ 25 ~ so sP 29 · SAME AS ABOVE ~ 30 m 25 39 I~/ ML SANDY SILT (NIL): Gmblue - gry, very stiff, Iow plestlc, 44B no dry slmtgh, 60% fines, 40% sand, fine-meal grained, 50 poorly srted, homo, moist, organics, strong hydrocartmn odor. AEC WELL/BORING LOG of 2 P.O. BOX 4067'2 BAKERSF!F'LD, CA 93384 PROJECT ChleoandtheManlGoneBolton LOCATION 231E. 18thStreet, Bakersfield, California WELL/BORING NO. B-4 SURFACE ELEVATION WELLHEAD ELEVATION N/A DATE DRILLED 12/15/93 LOGGED BY J. Dunwoody REVIEWED BY J. DUNW_OOO_Y DRILUNG COMPANY S B & S Dflllin~ Company DRILLER ___~em_Smlth METHOD ~/'IOLI~_O__W_S__TI~_ M.._A_..U_G~R BORE HOLE DIAMETER 8 INCH TOTAL DEPTH 60' DEPTH TO WATER: INmAL N/A STATIC NIA CASING TYPE DIAMETER SCHEDULE INTERVAL__ N/A_ TO SCREEN TYPE DIAMETER SLOT SIZE INTERVAL N/A TO N/A FILTER PACK TYPE INTERVAL N/A __.TO .... _N./.A_. .... SURFACE SEAL TYPE Cement sand slurry over bentonite INTERVAL N/A TO N/A NOTES ,~"PLE ~O ! U.S.C.S. '1~ WELL DEPTH PID ~RVAL LI LOGIC DESCRIPTION DETAIL (ppm) aLOWCOUm' LOG 22II subang-submd, meal dan~e, homo, hydrocarbon odor. --~ 40 m 75 29 ~ SW SAME AS ABOVE 28 ! · .-- 45 ~ 75 38 I ML SILT WITH SAND (MI..): Dk yell-bm, hard, 20% sand, fn-cse, homo, 35I s~rong hydrocarbon odor. m 50 ~ 25 2s I SW WELL GRADED SAND (SW): Redishbm, fn-cse graJnedd, 29 subeng-submd, very de~se,homo, moist, mod hydrocarbon odor. ~ 55 ---- 0 6 · SAME AS ABOVE 12I SW 10 SILTY SAND/SANDY SILT (SM/MI.): Reddish 60 ~ 0 20~ bm-dkyellbm,dne~e/hard, 60% flne~, 50% sand, fn-med, homo, no T. D. Drilled __ 24 ~ SM/ME oder. 60 Feet so ~ 65 ,~ov,~~cEo E~V,~ONM~./,rr,~,. CO~C~PT~ WELL/BORING LOG 2 of 2 AEC ~,.o. ~ox ~ ~a~t~w. ca ~ PROJECT Chleo and the Man / Gene Bolton LOCATION 231 E. 18th S1]'eet, Bakersfield, California WELL/BORING .O. B-4 Advanced Environmental Concepls. Inc. · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · ASSOCiATED LABORAK)RIES 806 North Bata~a. Orange, California 92668- CLIENT Advanced Environmental Concept Attn: Jon Buck 4400 Ashe Road Suite #206 Bakersfield, CA 93313 (4283) FAX 714/558.1209 LAB NO, G64635-01 REPORTED 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, CA As Submitted RECEIVED 12/16/93 B1-20' B1-30' B1-40' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline ND< 5 ND< 5 11 Benzene (mg/kg) ND< 0.005 ND< 0.005 0.80 Toluene (mg/kg) ND< 0.005 ND< 0.005 2.0 Ethylbenzene (mg/kg) ND< 0.005 ND< 0.005 0.11 Total Xylenes (8020) (mg/kg) ND< 0.015 ND< 0.015 0.93 Date Analyzed: 12/24 & 27/93 A S SOS IATED~LLAB?--~WR I ES, by: EfiB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reports of the Associated laboratories are confidential property of our clients and may not be reproduced or used for publication in part or in full without our written permission. This is for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCIATED LABO RIES 806 North Batcrvia-Orange, Cali[ornia 92668-714/771-6900 CLIENT Advanced Environmental Attn: Jan Buck 4400 Ashe Road suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED FAX ~4/538-1209 G64635-02 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, As Submitted CA RECEIVED 12/16/93 B1-50' B1-55' B1-60' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline 13 19 ND< 5 Benzene (mg/kg) ND< 0.005 0.08 ND< 0.005 Toluene (mg/kg) ND< 0.005 0.15 ND< 0.005 Ethylbenzene (mg/kg) ND< 0.005 ND< 0.005 ND< 0.005 Total Xylenes (8020) (mg/kg) ND< 0.015 0.06 ND< 0.015 Date Analyzed: 12/24 & 27/93 E .-'~. _%~eh Vice President ESB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reports of the Associated Laboratories are confidential property of our clients and may not be reproduced or used for publication in part or in full without our written permission. This ts for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCIATED LABORATORIES ~ Batavia-Orange, C.~li[omia 92668-~14/7~1-6900 Advanced Environmental Attn: Jon Buck 4400 Ashe Road suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED FAX 714/538-1209 G64635-03 12/30/93 FAX ~14/558-12~ G64635-04 12/30/93 Soil ~ATION Chico & The Man 231 E. 18th, Bakersfield, SAMPLE As Submitted CA RECEIVED 12/16/93 12/16/93 B2-15' Hydrocarbons QMS) (mg/kg) 3asoline 4,300 ne (mg/kg) ND< 0.005 ne (mg/kg) 2.2 ~enzene (mg/kg) 4.3 Xylenes , (mg/kg) 380 B2-25' 2,600 0.20 35 40 300 B2-30' 9,800 45 910 250 1,400 B2-45' 39 0.23 2.0 0.56 3.4 ~nalyzed: i~residenl 12/24 & 27/93 Unless notified in writing, all samples will by appropriate disposal protocol 30 days from be discarded date reported. iiscarded .e reported. Associated Laboratories are confidential orooerty of our clients and ~Juced or usecl for publication in part or in full without our written :is for the mutual protection of the Public° our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Env;ronmental * TESTING & CONSULTIb Chemicc Microbiologlcc Enwronmentc ASSOCiATED LABORAIORIES 806 North Bata~a - Orange, California 92668 - 714/~1-6900 CLIENT Advanced Environmental Concept Attn: Jon Buck 4400 Ashe Road suite #206 Bakersfield, CA 93313 (4283) LAB NO. REPORTED F;zX ~14/538-1209 G64635-05 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, As Submitted CA RECEIVED 12/16/93 B2-50' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline 4.6 Benzene (mg/kg) ND< 0.005 Toluene (mg/kg) 0.85 Ethylbenzene (mg/kg) ND< 0.005 Total Xylenes (8020) (mg/kg) 0.20 B2-55' B2-60' 10 15 0.08 ND< 0.005 0.02 ND< 0.005 0.01 ND< 0.005 0.10 ND< 0.015 Date Analyzed: 12/24 & 27/93 by: ESB/gl NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reports of the Associated Laboratories are confidential property of our clients and may not be reproduced or used for puDlication in part or in full without our written permission. This is for the mutual Protection of the Public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCLItTED I..ABO RIES 806 North Batavia-Orange, California 92668-714/771-6900 CL~IENT Advanced Environmental Concept Attn: Jon Buck 4400 Ashe Road suite #206 Bakersfield, CA 93313 (4283) LAB NO. REPORTED FAX ~14/538-1209 G64635-06 12/30/93 SAMPLE soil IDENTIFICATION Chico & The Man 231 E. 18th, Bakersfield, BASED ON SAMPLE As Submitted CA RECEIVED 12/16/93 B3-20' B3-30' B4-30' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline 42 2,700 70 Benzene (mg/kg) ND< 0.005 12 0.11 Toluene (mg/kg) ND< 0.005 200 1.5 Ethylbenzene (mg/kg) ND< 0.005 56 1.3 Total Xylenes (8020) (mg/kg) ND< 0.015 340 4.4 Date Analyzed: 12/24 & 27/93 ASi°c Vice President by: ESB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reports of the Associated Laboratories are confidential property of our clients and may not be reproduced or used for publication in part or in full without our written permission. This is for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological . EnWronmental · ASSOCIATED LABORATORIES 806 North Batavia-Orange, California 92668-714/771-6900 CLIENT Advanced Environmental Attn: Jon Buck '4400 Ashe Road Suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED FAX ?14/538-1209 G64635-07 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Mall 231 E. lSth, Bakersfield, As Submitted CA RECEIVED 12/16/93 B4-50' B4-60' Total Hydrocarbons (TPH DtlS) (mE/kg) -Gasoline 16 17 Benzene (mE/kg) ND< 0.005 0.02 Toluene (mg/kg) 0.Gl 0.10 Etbylbenzene (mE/kg) ND< 0.005 0.02 Total Xylenes (802u) (mE/kg) 0.039 0.16 Date .A-al~rze,-]' I,./~., & 27/93 ASGOC,~AT~RP~JORIES, r,'¢: ESB/ql NOTE: Unless notified in wcJ'ting, all by appropriate disposal protocol. samples 30 days will be discarded from date reported. The reports of the Associated Laboratories are confidential property of our clients and may not be reproduced or used for publication in part or in full without our written permission. This is for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · (~SSOCIA TED LABORATORI~ · COMMITME~rr TO QUALITY ' QUALITY CONTROL/QUALITY ASSURANCE REPORT G64635 QA/QC CONTROL NO. G64689 INSTRUMENT LOGBOOK Hyd 1-6 DATE G64689 ANALYZED Dec 23 1993 I.L.B. PAGE LOCATION 53 DATE G64635 ANALYZED Jun 23 1993 SAMPLE LOG PAGE LOCATION 35 [ EPA 8020 REPORTING UNITS rog/kg SAMPLE MATRIX soil ] COMPOUND SR SR1 RPD S.A. 8SR $$R1 56RE %REI RPD BLK BENZENE 0 0 0 0.05 0.054 0.046 108 92 16 0 TO£U£~:ii" :...~,. ........ . .0:. . 0:,. ~0 '0.05 ~0. o550.05I!.:i.!. .I~0.'.!:!:::..!:!.!: J02..i:':::::!:!:ii!:: 7.'-~.i:..i..i::,'./ '011!!!:..:. E TH YLBE3rZENE 0 0 0 O. 05 O. 052 O. 048 104 96 8. 8 0 XYLENE$ 0 0 0 0.15 0.16 0.149 107 99 7.8 0 CHroROB£gT__~mr · · :i'' ', v.. 'Y ..i · · 1,2-DICHLOROBENZENE I ,$-DICHLOROBENZENE AvE AcE lo I [loz I 9z l 1o SR ....... SAMPLE '1 SRI ..... SAMPLE DUPLICATE RPD----- R£LATIVE PERCEt~rr DIFFERENCE S.^.--- ANALYTE SPIKE ilq SAMPLE MATRIX SSR ..... SPIKE RECOVERED ^ND SAMPLE '$R' SSR I .... SPIKE RECOVERED ^ND SAMPLE 'SRI ~,RE .... PERCENT RECOVERY OF SPIKE IN %REI-- PERCENT RECOVERY OF SPIKE IN BLK ..... AN^LYTE CONCENTR^TION DETECTED IN LAB BL^NK 99~; ..... UPPER/LOWER CONTROL LIMIT 95% ..... UPPER/LOWER W^RNING LIMIT s .......... STANDARD DEVIATION 2s ........ 2 x ST^ND^RD DEVI^TION (WARNING LIMIT) 3s ........ 3 x STANDARD DEVIATION (CONTROL LIMIT) MEA~-- TIME WEIGHTED ~VER~GE OF SPIKE RECOVER~ SURROGATE SPIKE D~TE BERZERYL FLHORIDE SPIKE CORCE~R~TIO~ OF 150 WITH ~ RECOVERY OF 79 ~ BE~ZE~YL FLHORIDE RECOVERY LIM~S O~1 PASS / NO PASS ~~ DATE TYPED Dec 29 1~ A!33201 ACTION TAKEN SPIKE SOURCE EPA Repositor~ Dil. STANDARD LOT NO. BTX 40893 ANALYST Rick,,Conn QA / QC COMPILER tSSOCIATED LABORATORI~ ' CoMMrI'MENT TO QUALITY ' QUALITY CONTROL/QUALITY ASSURANCE REPORT G64635 QA/QC CONTROL NO. G64689 INSTRUMENT LOGBOOK Hyd 1-6 DATE G64689 ANALYZED Dee 23 1993 I.L.B. PAGE LOCATION 53 DATE G64635 ANALYZED Dee 23 1993 SAMPLE LOG PAGE LOCATION 35 EPA 8015M/D.H.S.L.U.F.T. REPORTING UN1TS mg/kg SAMPLE MATRIX soil COMPOUND 8R 8RI RPO S.A. SSR $snl %RE %REI RPO BLK ' GASOLINE 0 0 0 5 5.4 5. 7 108 114 5 0 DIESEL · [° I I I'* SR ....... SAMPLE X O SRI ..... SAMPLE DUPLICATE RPD---- RELATIVE PERCENT DIFFERENCE S.A.--- ANALYTE SPLICE IN SAMPLE MATRIX SSR ..... SPIKE RECOVERED AND SAMPLE 'SR' SSRI .... SPIKE RECOVERED AND SAMPLE 'SRI' %RE--- PERCENT RECOVERY OF SPIKE IN 'SR' %REI--- PERCENT RECOVERY OF SPIKE IN 'SRI' BLK .... ANALYTE CONCENTRATION DETECTED IN LAB BLANK 99% ..... UPPER/LOWER CONTROL LIMIT 95ff ...... UPPER/LOWER WARNING LIMIT s ......... STANDARD DEVIATION 2s ....... 2 x STANDARD DEVIATION (~VARNING LIMIT) 3s ........ 3 x STANDARD DEVIATION (CONTROL LIMIT) MEAN-- TIME WEIGHTED AVERAGE OF SPIKE RECOVERY SURROGATE SPIKE DATE BENZENYL FLUORIDE SPIKE CONCENTRATION OF WITH A RECOVERY OF BENZENYL FLUORIDE RECOVERY LIMITS OF TO PASS / NO PASS /~v _/J,~ DATE TYPED Dec 29 1993 BI33201 ACTION TAKEN SPIKE SOURCE SH-R STANDARD LOT NO. Gas 52093 ANALYST Danielle Luian QA / QC COMPILER /J/~,,,O ,,-'" CHAIN-OF-CUSTODY RECORD Proj~ A~ ~ ~ ~ o Chilled Y~ I No ~ t CHAIN-OF-(.;~S', ~ . ..... liant Date LAB.. ~ e S~ple Co~iti~ ' : '" Dae e. ~v~ by: (Sig~e~ Date ~ ~in~i~ W: (Sig~re) Dae ~ R~eiv~ by ~a~: (Signature) Date ~ADVANCED ~NVIRONMENTAL CONCEf & Associates "V" Street Bakersfield, CA 93304 (805) 327-0671 (805) 324-4218 FAX --April 14, 1994 Mr. Gene Bolton Post Office Box 11324 Midland, Texas 79702 SUBJECT: Remediation of Soil 231 East 18th Street Bakersfield, California Dear Mr. Bolton: BSK & Associates (BSK) has evaluated options to remediate approximately 6,300 cubic yards of soil containing gasoline at the above-referenced site in Bakersfield, California. Remediation options for soils containing'gasoline include ex-sim and in-sim methods. Soil excavation (ex-sim treatment) is effective for most soils and petroleum hydrocarbons. Excavation is generally limited to depths of 25 feet and can be further limited by site development and site operations. Extent of attainable cleanup is usually more predictable and more likely to be complete. Remediation usually requires shorter time periods and is time- dependant on the type of surface treatment selected (i.e. off-haul, recycling, or controlled on-site aeration). Environmental impact and site disturbance can be substantial, including risk of chemical exposure and physical contact with chemicals. The potential for damage to nearby structures and other site features can be high. Costs for ex-sim treatment of hydrocarbons in soil deeper than 25 feet are typically high and can approach one million dollars depending on site-specific conditions. In-sim remedial methods include bioremediation, vapor extraction, and bioventing. In-sim methods are generally effective in permeable soil types (i.e. sand and sand silt mixtures) and are not limited by depth or by site development. Site operations are usually only minimally interrupted by system installation and maintenance tasks. Extent of attainable cleanup often varies depending on soil types and type of contaminant and is generally not entirely complete. In-sim methods require long periods of time (on the order of several years) in comparison to ex- situ treatment. Environmenfial impact and site disturbance are usually minimal. Short-term liabilities are minimal. Long-term liabilities may result from incomplete reduction. Costs associated with in-sim methods are generally substantially less in comparison to ex-situ methods. Geotechnical Engineering · Engineering Geology · Environmental Services · Construction Inspection & Testing · Analytical Testm; R6mediation of Soil 231 East 18th Street Bakersfield, California April 14, 1994 Page 2 Results of BSK's informal feasibility study and our review of available site information and site characterization reports indicate that the site is suitable for in-situ remediation. BSK is looking forward to working with you on this project. If you choose to select BSK as your remediation contractor, we would be plea.ned to meet with you to discuss a project scope and negotiate a contract. We appreciate the opportunity to propose an alternative for remediation of your site. If you have questions or require additional information, please contact our Bakersfield office. Respectfully submitted, BSK & Associates Brace M. Blythe Project Geologist BMB/ds & Associates "V' Street Bakersfield, CA 93304 (805) 327-0671 (805) 324-4218 FAX April 15, 199,* PROPOSAL BP94053 Mr, Gene Bolton Post Office Box 11324 Midland, Texas 79702 SUBJECT: Proposal and Fee Estimate Remediation of Soil 231 East 18th Street Dear Mr. Boiton: BSK & Associates (BSK) is pleased to present our proposal for soil remediation at the former Chico and the Man service station site in Bakersfield, California. Information concerning the site was obtained from our review of the Environmental Assessment Report prepared by Advanced Environmental Concepts dated January 1994. The site is presently a vacant, commercially zoned, parcel at the southwest corner of East 18th and Sonora Streets. Gasoline product originating from leaking USTs has migrated to an approximate depth of 45 feet and extends laterally for a distance of 20 to 30 feet from the source point. Known maximum concentration of gasoline in soil is 14,000 ppm. Maximum known benzene concentration is 120 ppm. Gasoline migration reportedly extends in an eastwardly direction into the right-of-way of Sonora Street. Subsurface soils are granular ranging from poorly graded sand to silty sand. Groundwater is reported to occur at. a depth of 200 feet in the vicinity of the site. Two options for soil remediation are presented for your consideration. OPTION A - BIOVENTING Fuels such as gasoline are well-suited for Bioventing treatment. Bioventing biodegrades petroleum hydrocarbons through the stimulation of indigenous bacteria which are present in nearly all natural soils. To increase hydrocarbon degradation rates, environmental conditions within the soil are optimized by introducing oxygen into the impacted soil zone. Through their metabolic processes,, bacteria works to reduce hydrocarbon levels in soil. By limiting air emissions through reinjecting0into the soil and limiting the clean air influx rate to the minimum flow needed to promote biodegradation, the need for air emission control is avoided or greatly reduced. Geotechnical Engineering · Engineering Geology · Environmental Services · Construction Inspection & Testing · Analytical Testir~g Proposal and Fee Estimate Remediation of Soil 231 East 18th Street Proposal BP94053 April 15, 1994 Enclosure 1 -Page 1 SUMMARY OF ESTIMATED FEES SO1L REMEDIATION 231 EAST 18TH STREET OPTION A - BIOVENTING CAPITAL COSTS Governmental Permits: Pilot Study: Well-Field and Equipment Installation: Progress and Post-Operation Assessments and Closure: Project Management, Plans, Engineering, Permitting and Reporting: Estimated Total: 500 5,000 20,000 15,000 25,000 65,500 MONTItLY EXPENSES Equipment Rental: Electricity: Sampling and Maintenance: Estimated Monthly Total: $ 500 350-500 750 $1,600-1,750 Proposal and Fee Estim,,,e Remediation of Soil 231 East 18th Street Proposal BP94053 April 15, 1994 Page 2 Scope of Services .Qption A o Preparation of Remedial Action Plan specific to the proposed scope of work for submittal to the KCEHSD o Obtaining required permits o Drilling, sampling and logging soil borings and construction of extraction wells o Submitting selected soil samples to BSK Analytical Laboratories for analyses of Total Petroleum Hydrocarbons as gasoline and BTEX o Underground piping, including trenching, materials, valves,.fittings, electrical and labor (electricity connection to be provided by client) o Equipment and equipment installation, including skid mounted blower o Pilot Testing commensurate with system startup o Operations and maintenance including monthly sampling and analyses o Remedial-progress assessment, including drilling, confirmation sampling, chemical analyses, and progress reporting o Post-operation drilling, confirmation sampling and chemical analyses, well closure, piping removal and grouting o Project management, engineering design, and final reporting Estimated. . Fees Option..A - Estimated cost for the scope of services described would be approximately $65,500 and monthly operating costs would range from $1,600 to $1,750 per month. A Summary of Estimated Fees is attached. OPTION B - VAPOR EXTRACTION Vapor Extraction involves the removal of gasoline vapors from subsurface soils by mechanically drawing or venting air through the soil matrix. Vapors brought to the surface may be treated through a thermal oxidizer eguipped with a catalytic module. Gasoline concentrations in soil are reduced to carbon dioxide which can be safely emitted to the atmosphere. This alternative would require the construction of extraction wells and the installation of a transportable vapor extraction and thermal oxidation unit. Proposal and Fee Estimate Remediation of Soil 231 East 18th Street Proposal BP94053 April 15, 1994 Page 3 Scope of Services Option B o Preparation of a Remedial Action Plan specific to the proposed scope of work o Obtaining required permits o Drilling, sampling and logging soil borings and construction of extraction wells o Submitting selected soil samples to BSK Analytical Laboratories for analyses of Total Petroleum Hydrocarbons as gasoline and BTEX o Underground piping, including trenching, materials, valves, fittings, electrical, and labor o Equipment and equipment installation, including thermal oxidizer unit o Electrical and natural gas hookups for the thermal oxidizer unit (electricity and natural gas connections to be provided by clien0 o Pilot Testing commensurate with system startup o Operation and maintenance including monthly sampling for air pollution control requirements (if required) O Remedial progress assessment, including drilling, confirmation sampling, chemical analysis, and progress reporting. o Post-operation drilling, confirmation sampling and chemical analyses, well closure, piping removal and grouting o Project management, engineering design, and final reporting Estimated Fees Option B - Estimated cost for the scope of services described would be approximately $81,000 and monthly operating costs would range from $5,750 to $6,000 per month. A Summary of Estimated Fees is attached. BSK & Associates Enclosure: Summary of Estimated Fees Proposal and Fee Estim.,e Remediation of Soil 231 East 18th Street Proposal BP94053 April 15, 1994 Enclosure I - Page 2 SUMMARY OF ESTIMATED FEES SOIL REMEDIATION 231 EAST 18TH STREET OPTION B - VAPOR EXTRACTION CAPITAL COSTS Governmental Permits: Pilot Study: Well-Field and Equipment Installation: Progress and Post-Operation Assessments and Closure: Project Management, Plans, Engineering, Permitting and Reporting: Estimated Total: $ 500 5,000 30,000 20,000 25,000 80,850 MONTHLY EXPENSES Equipment Rental: Electricity and Natural Gas: Sampling and Maintenance: Estimated Monthly Total: $ 2,500 750-1,000 2,500 $5,750-6,000 ENVIRONMENTAL HEALTH S,-t.~ES DEPARTMENT STEVE McCALLEY, 2700"M" STREET, SUITE34)0 BAKERSFIELD, CA 93301 Phone: (805) 662-8700 FAX:(805) 862-8701 R.E.H.S., Director April 29, 1996 ..~O'URCE MANAGEMENT AGENCY DA VID PRICE III, RMA DIRECTOR Engineering & Survey Sewicea Department Envimnrnental Health Services Department Planning Department Roads Department Gene Bolton Pro-Tech Specialties P. O. Box 11324 Midland, TX 79702 SUBJECT: Location Known As Permit # 231 E. 18th Street, Bakersfield, CA Chico & the Man 150040 Dear Mr. Bolton: This letter confirms the completion of site investigation and remedial action at the above site. With the provision that the information provided to this agency was accurate and representative of existing conditions, it is the position of this office that no further action is required at this time. Please be advised that this letter does not relieve you of any liability under the California Health and Safety Code or Water Code for past, present, or future operations at the site. Further, it does not relieve you of the responsibility to clean up existing, additional, or previously unidentified conditions at the site which cause or threaten to cause pollution or nuisance or otherwise pose a threat to water quality or public health. Additionally, be advised that changes in the present or proposed use of the site may require further site characterization and mitigation activity. It is the property owner's responsibility to notify this agency of any changes in report content, future contamination findings, or site usage. If you have any questions regarding this matter, please contact Dan Starkey at (805) 862-8757. DS:cas cc: A E C Environmental Health Servi~artmenC~ Regional Water Quality Control Board colfi150040.b 64,6,25.00 P (J :3 SCOPE 0¥ WORK ef.r~ctive, Prepm'~ ~nd submit to the Kern County Environmental Health Services ~p?mment tKCEHSD) a RemoVal Action Wink ~.n and 1t¢~ asd 5a~ PI~ for ~ f~i[ity; :ns~l t,h. ree 'vadose zon, wo]!$ in order to conduct a pilot v:-'.do~e zone wells. Cc,.st e. sdmam includes [he c~:s: of two ~.dcl.i~oniil w¢ih~ for a total of Eve. Any additioneJ ',t.'ell~ needed will increase Soil s~_r. nples wilJ be coll:.cted eve:7 five feet h~ all we[l boEngs, tis ?re'.~cribed in ~tace ceNfied Iabcra:og. for sn~;,'sis of Total Pe:rcl~um Hydm~yarbons ~:ts gasoline and maintain a vapor exu'actlon uni*. for a peziod (;f :~i mon..'hs; Collect vapor simph',s from the vapor ,xtracdon .9'stem on ,'i ti-monthly bas!i for l~:b,.)ra~o~."y analy~i.., fo...' a pe.,.,.ic~ not to exceed s!x months; Dispo~M of ail drill cuttings ,'.o tee appropha!e dispost~ facility; Reports will b~ prepa..,'~xi detailing obse;wation~ made in 0~e field a:',d results of ;et'nm r..nendadons; the ,x ...r:.n.~ w :]¢t=m~[n¢ ~,,. mos~ c[?s~-e~:ecnv'e and ef~cie~nt m~4,,''.-t~ ' .,; -,r , ,,.,.~_. to sm.,.e {.ut,. probleius. If you ha:': an?' que.~d;:ms md;ltd'lng the.. S¢,.,p¢ of Work or Cos~ Estin'lzte, p.,~ :,:,c ,:;ill me UNDERGROUND STORAGE TANK UNAUTHORIZED RELEASE (LEAK) / CG .... AMINATION SITE REPORT PHONE ~ SlGNA~RE / / ADDRESS G~ STA~ Z~ NAME ~ ~NT~TPERSON I PHONE FACILI~ N~E (IF APPLICABL~ ~ OPE~TOR ~ PHONE ADDRESS CRO~ STREET L~AL AGENCY AGENCY N~E ~NT~T PERSON PH~E REG~N~ BOARD PN~E ( ) (1) NAME QUANTI~ Lost (~LLONS) (21 ~ UNKNOWN DA~ DIVERGE GE~ M~OD USED TO STOP DISCHARGE (CHECK ~L ~AT APPL~ ~ "l OI OI ,Y~ YI ~ UNK~WN ~ REMOVE ~N~N~ ~ CLOSE TANK & REMOVE ~ REPAIR PIPING HAS DISC~RGE BEEN STOPP~ ? ~ REPAIR TANK ~ CLOSE TANK & FILL IN P~CE ~ CHANGE PR~EDURE SOURCE OF DIVERGE CAUSE(S) ~ TANK~K ~ UNKNOWN ~ OVERFI~ ~ RUPmR~AILURE ~ SPILL ~ UNDERMINED ~ SOIL ONLY ~ GROUNDWATER ~ DRINKING WATER - (CHECK ONLY IF WATER WELLS HA~ AC~ALLY BEEN A~EC~D) CHECK ONE ONlY ~ NO AC~ON TArN ~ PR~IMINARY S~ A~ESSMENT ~R~N SUBM~ED ~ POLLUTION CHARAC~RI~TION ~ L~ GEI~ ~NFIRMED ~ PRELIMINARY SI~ ~ESSMENT UNDERWAY ~ POST CL~UP MONITORING IN PROGRE~ ~ REMEDIATION P~N ~ CASE CL~ED(CLE~UP~MPLE~DOR UNNECE~AR~ ~ CLE~UP UNDERWAY CHECK APPROPR~TE ACTION(S) ~ EXCAVA~ & DISUSE (ED) ~ REMOVE FREE PRODUCT (FP) ~ ENH~CED BIO DEG~DATDN (1~ ~ C~S~(CD) ~ EXCAVATE&TREAT(E~ ~ PUMP&TREATGROUNDWA~R(G~ RE~CESUPPLY(R~ ~ ~NTAINMENT BARRIER (CB) ~ NOACTDNREOUIRED(NA) ~ TREA~ENTATH~P(HU) ~ VENT~IL~S) ~ wcuu~ Exm~c~ ~ ~ O~.ER (O~ HSC 05 (8/90) I',~r. Gene B..bitof P' O. Box ~1324 Midiana. TX 79702 D~ar Mr Pcoilon: P~.')f. OSA.L,' ,* ~ 24z Ch!co & The Mac 23~ East '~8~t; S~ri~et iSakersfie!d. CA ~ ~.A~DVANCED ENVI,qONMENTAL CONCEP'rS-tNC,, rf¢gula~o,,"r' ..'::c:,pr~va: (2-montr.s) ! V .r:;nal Repot! [1,rr~?~rltn) (tnoJudin2 mop.:t:$rlng data, ,r,J,:'aJO. Opal cor¢;rh'.,:,'Hor¥' .oro.~rorr~i i .:,,U,L, 0 ,UU 30 r ",* 0'.2 U ,,, 6.300 O0 2.C',00.00 3,500.00 4.500.00 $67,700,00 Mr. ~ne 6oiior., De Ir:vo[ceO on o monlh;~' ~sls, I Op?Cb, ,- ..... ~ fO CrO~er¢ OUr ...... ~_1 Concepts, Inc. $1gnoture' f-;ignafu~e: 150040 Chico & The Man Station 231 E. 19th St., Bak. Contrac: Status : Est TOC: Grndwtr: Comment: AEC 831-1646 Case Closed 5-96 No groundwater contamination 5 9-6-95 12-28-95 3-6-96 4-23 -96 . receiving funds from the state. Case was inactive for many years because of RP's financial problems. No information received. At site VES system operating. Reviewed closure workplan and drafted letter of approval. Workplan states that VES system has stabilized and levels of contamination are low. Submitted closure s~mmery to RWQCB. Reviewed conformation boring assessment report. Drafted closure letter. VES application being sent to SQVAPCD. Facility :ALIFORNIA - CALIFORNIA ENVIRON,,' 'rAL PROTECTION AGENCY PETE WILSON, Governor VATER RESOURCES CONTROL BOARD OF CLEAN WATER PROGRAMS T~ET, SUITE 130 944212 .NTO, CALIFORN!A 04244-2120 ~27-4307 ~27-4530 (FAX) JUL 1 2 ;irginia Nielsen Box 11324 ~d, TX 79702 3ROUND STORAGE TANK CLEANUP FUND PROGRAM, NO RESPONSE TO LETTER OF UMENT (LOC): CLAIM NUMBER 000071; FOR SITE ADDRESS: 231 E. 18th Bakersfield, CA come to my attention that the LOC issued to you on January 10, 1994 amount of $20,000 has not been responded to with a request for ursement. e submit your reimbursement request with all of the required rting documentation, or a written explanation as to the status of the up and why you have not requested reimbursement to date. If a request equate explanation is not received within thirty (30) calendar days the date of this letter, I will take steps to begin the withdrawal ss of your LOC. send your reimbursement request or explanation to: State Water Resources Control Board Division of Clean Water Programs Underground Storage Tank Cleanup Fund Program Attention: Lydia Bracco Claim No. 000071 P.'O. Box 944212 Sacramento, CA 94244-2120 u have any questions, please contact Pamela Rarick at (916) 227-4516. ~rely, · Bra¢co, Team Leader, Region 5 'ground Storage Tank Cleanup Fund Kern County EHD Attn: Joe Canas 2700 M Street, Suite 300 Bakersfield, CA 93301 · AOVANCED ENVIRONMENTAL CONCEPTS iNC' ~ '~' .... ~"-'"~':~- '::i ::~'i ~'ii~:~'~ -' : · '2 2.. ~-', ,3 3 ! ~* STATE OF CALIFORNIA o CALIFORNIA ENVIRONM=~'TAL PROTECTION AGENCY STATE WATER RESOURCES CONTI~ BOARD DIVISION OF CLEAN WATER PROGRAMS 2014 T STREET, SUITE 130 P.O. BOX 944212 SACRAMENTO, CALIFORNIA 94244-2120 (916)227-4307 (916)227-4530 (FAX} Mrs. Virgin~ielsen P. O.--B/~11324 Tl~d, TX 79702 PETE WILSON, Governor -$EP 7 1994 UNDERGROUND STORAGE TANK CLEANUP FUND PROGRAM, NOTICE OF PROPOSED WITHDRAWAL OF LETTER OF COMMITMENT, CLAIM NUMBER 000071 SITE ADDRESS: 231 E. 18th St., Bakersfield, CA A Letter of Commitment (LOC) was issued to you on January 10, 1994. Pursuant to its terms and conditions, an LOC may be withdrawn at any time if the claimant is found to be not in compliance with any applicable state rules and regulations, and with all of the terms, conditions, and commitments contained in the claimant's application. This letter is to notify you that the Underground Storage Tank Cleanup Fund 'is proposing to withdraw your LOC for the following reason(s): On July 12, 1994· a letter entitled "No Response to Letter of Commitment"" was sent to you. You were given thirty (30) calendar days from the date of the letter to submit your reimbursement request with all of the required supporting documentation, or a written explanation as to the status of the cleanup and why you have not-requested reimbursement. To date· we have not received a response from you. If you are not in agreement with this decision, you may request a review of the decision by the Manager of the Underground Storage Tank Cleanup Fund Program within thirty (30) calendar days of the date of this Notice. Please send any request for review to: Mr. Dave Deaner, Manager Underground Storage Tank Cleanup Fund Program State Water Resources Control Board Division of Clean Water Programs P. O. Box 944212 Sacramento, CA 94244-2120 If a request for review of this decision is not received within thirty (30) calendar days of the date of this notice, your LOC will be withdrawn. If you have any questions, please contact me at (916) 227-4374. Sinc ely, ~ · Team Leader Region 5 Underground Storage Tank Cleanup Fund CC: Kern County EHD Attn: Joe Can'as 2700 M Street, Suite 300 Bakersfield, CA 93301 · ADVANCED ENVIRONMENTAL CONCEPTS INCa` September 22, 1994 Ms. Flora Darling Hazardous Materials Specialist Kern County Environmental Health Services Department 2700 "M" Street, Suite 300 Bakersfield, California 93301 RE: Reply to r,,.,,-, .,~,., request for additional information regarding the Chico & The Man Site, KCEHSD Site #150040. Dear Ms. Darling, Please find below the additional information you requested regarding the remedial action activities at the above stated facility. The information will be listed in the order that it was requested in the KCEHSD letter dated August 30, 1994. Radius of influence can be calculated using the following parameters: t. flow rate 2. permeability 3. screened interval 4. change in pressure 5. viscosity of gas 6. temperature of gas 7. compressibility of gas 8. well radius When these parameters are held constant and solved for effective radius of influence for a rar~ge of permealoi!ity values the result is radius of influence distances from 19 to '140 feet. These results are presented in Table '1. TABLE 1 EFFECTIVE RADIUS PERMEABILITY RADIUS [in darcys] [in feet] 10 140 9 71 8 36 7 19 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MINI:] · 4400 ASHE ROAD, #206 · BAKERSFIELD. CA 93313 805/831-1646 * FAX 805/831-1771 Ms. Flora Darling Chico & The Man Page Two Advanced Environmental Concepts, Inc. AEC has measured influence distances in excess of 55 feet at other sites in Kern County that have soil types similar to those found at the Chico & The Man site. AEC estimates that influence radii at the subject site would be between 40 and 90 feet. Once vadose wells are installed at the site the communication between wells will be measured and placement and/or addition of subsequent wells adjusted accordingly. The physical measuring of well communication will be accomplished by inducing a vacuum on the vapor extraction well network using a 250 cfm vacuum pump. The vacuum will be isolated on one individual well while measuring the effect on another well using a Merium U-Tube Manometer. The estimated time required to achieve the cleanup goals of 4/50/50/50 and 'I000 ppm for BTEX and TPH-g, respectively is one year, The method AEC proposes to use to demonstrate that these goals have been achieved is conformation soil borings. Location, number and sample points will be submitted to KCEHSD for approval prior to commencement of the activities. The total impacted area at the subject site is approximately 37,073 cubic feet. This area can be divided into two distinct sub-areas, that less than 4000 ppm and that greater than 4000ppm with approximate volumes of 24,980 and 42,093 cubic feet, respectively. To determine the gallons of product present in the impacted area average hydrocarbon concentrations of 6400 ppm for the greater than 4000 ppm area and 400 ppm for the less than 4000 ppm area were used. These average concentrations result in estimated gasoline quantities of 4450 and 200 gallons in the greater than 4000 ppm and less than 4000 ppm plume areas, respectively. Monitoring of the cleanup activities will be performed by collecting influent and effluent air samples from the vapor extraction machine and submitting them to a laboratory for analysis of TPH-g and BTEX. The frequency of this sampling will be weekly for the first month and monthly after that. In addition to the air sampling the influent will be measured with a Gastech GT302 LEL meter for hydrocarbon and oxygen levels. This testing method will be performed daily for the first two weeks then weekly there after. If you should require additional information, please do not hesitate to contact our office at 834- 4646. Sincerely, Advanced Environmental Concepts, Inc. // Registered Geologist~5504 cc: Mr. Gene Bolton Letr21Z · ENVIRONMENTAL CONCEPTS WiTH DESIGN IN MIND Mrs. Virginia Neilson June 19, 1990 Page 2 7) discharge, dispersal, release or escape is sudden and accidental; Coverage does not apply to liability arising out of damage t~ property owned, occupied, rented, or used by the insured or to property in the care, custody or control of the insured or as to which the insured exercised physical control for any purpose; 8) Coverage does not apply to any alleged property damage which is caused to work performed by or on behalf of the insured, arising out of the work or any portion thereof, or o~--of-materials, parts, or equipment furnished in connection therewith; 9) Coverage does not apply to liabilities arising out of the acts or omissions of any individual or organization other than those in~ividuals or organizations describe~ as "Named Insured" or Persons Insured" in the policies; lO) Any payments that might be made by Transamerica in this case are subject to the applicable limits of liability and/or deductibles as contained in the policy; 11) Coverage does not apply if the insured failed to provide notice to Transamerica in accordance with the conditions of the policy; 12) Coverage does not apply to any voluntary payment, assumed obligation or incurred expense other than for first aid to others at the time of any accident or occurrence; 13) In accordance with the assignment condition of the policy, coverage is not afforded for any person or entity whose interest in the ...policy is secured without the written consent of Transamerica; and 14) Should Transamerica assert and prevail on any of the reservations set forth herein, it does not waive its rights, if any, to seek reimbursement for any, indemnity or other payments made to you or on your behalf in connection with the captioned matter. As this matter develops further, you will be advised of any additional legal principles or policy provisions which might limit the indemnity obligations which Transamerica has undertaken or will undertake. It is my understanding that your property was leased to Chat Candelaria and he operated a gas station for several years. Mr. Candelaria has advised his insurance carrier, Sequoia Insurance, of this matter and I anticipate that they will also conduct a similar investigation into this matter. By copy of this letter to the Clifford Bradford Agency, I ask that Ms. Jan Woodin please forward the address of Mr. Ed Noriega. R'ANSAMERiCA INSURANCE GROUP June 19, ~990 Mrs. Virginia Nielson 1001Sylmar AVenue, # 31 Clovis, CA 93612 P°li~yh°lder: ~ans & Virginia Nielson Re= PrOperty lOCated at 231E. 18th St. BakerSfield, CA. Dear Mrs. Nielson: , ~2-~°Uareaware. _ ~°~camination .~'. ~ransameric~ ~ 2~v? submitted=~the aaptione~ n~s cOmmenced ;~:~h. Service; ~_~Ote that t~e s~te. In my r~, anvestigati~_ , __~aCterizat~__"~s requested __Aern Count.. ~=Vlew of th~ ~" into the = uperty is i.~i~aat¥ Stud.. _=_responsib~-'''="= of Envi__-''~= You "-uaated. : ~n~ remedi~.-= Party dev..~°nmental n ~*an before The insuring a -3ury or Prod any suit again_7 POlicies nr contemo~_~ _ ~erty dam~- . ~c the ...: = ~va~es th~- . Accord~=~ed by the __~e . Such a f~aCYhOlder _ .~u the f.._ *ngly, Tr~--- ~eneral li~:, request _ seeking d _~any has ~=s --~am · "-'-'~ a ' does ama e a You may inc,,- ~erzca Will .^~ty POlicieo = not COnsti...f s for bcd{3.. ~ ~n this m=~''~u reimbur._ o aSsued b~ - =cue a suit ~=er Unless a~ or Pay for==~ansamerica as We Will continue our investigation - ~ucn a su~- i''= ~ as initiated 1) Coverage dOes not appl sUbject to the fOllowing reservations: incurred in con. .... Y to 2) .... uu~°n With COSts alleged to have been In aCCOrdance With POll any claim for e~ui,=~, or t ged or r._ . mPzY to ..... ns and a- , =cOvered ~ .~ munltive ~=__ PPllcabl. __ 3) Coverage does not appi" =ne captio..~,,uges, fin--- =use law, not COnstitute ._ Y to an~ ~,-.=u matter; =~ or Penalties Propert.. = r a*aeged 4) ~any "PrOpert.. ~ ~ uama~e,, as ~age or ~=rlned in -= -'duty cares a .... ~ uamage,, ._ is no.~_urang Which T~_~h/ch takes ~, =ac policies;" does ~" property a_~''uer no obH..~sued by ~_-*auy tnsuJ~-.~ ~o the = ~cunage. --~aclon t~ ~ i-ansameri,~ -=nce to You $) Coverage does n ~ andemnify c1~, and thus Caused by an ,,_~t apply to any alleged dam a~ns for any 6) ~ccurrence,, as defin~ ~ age or injury Unless --~ uY the POlicy. Coverage does no f age arisino . ,apply to ~ Smoke, vaoo~r~ of the dis_,~*a~tY for ~qUids ~ _~ rs, Soot. ~.._ Charge, dl-- ~¥ inju~. _ or ,.~. 7' ~ases, w~--' -umes, acid~ -?persal, -= or Pro e ~ or Water, b..~ ~on land_ .= Other irr4.- lc chemical_ pe uu this e~-,' cue armor_= ~uants, c~-~ ~' ~uaUsion do._"maere or an- ~"=aminants =~ not ap l- ~I ~at~rcOUrse ~ ~ ~ such Mrs. Virginia Neilson June 19, 1990 Page 3 Thank you for your attention to this matter. Robert O. Edwards Claims Analyst ROE/jh cc: Jan Woodin ~ifford-Bradford Agency 1831 Truxtun Ave Bakersfield, CA 93301 Gene Bolton Pro Tech Specialties P. O. Box 11324 Midland, Texas 79702 :orner filling station leaves lasting memories HE KERN COUNTy Museum, re- " cenUy acquired a real gem. Not a diamond, emerald or ruby, but a M a building, a ~panish-Myle gas on from the late 1920s. The gas . was known as Chet's 66 and stood · corner of East 18th and Sonora. It run for the last 43 years by Chef elaria. he corner gas 'station has been a ~e in American life for many years, ~ts evolution and pa~sing is interest- ~ecause the changes that have oc- li to the comer gas station reflect ges that have happened to Kern [y and America since the drilling of rst oil well in 18~J, the development .~ automobile and later the oil crisis ccording to the American Petroleum ute in a 1930 boek caUed "Oil," the oil refiners were not interested in ine at all. instead it was a cause of JAMIE JACKS Contributing Columnl.~ worry. When refining oil, the desired product was kerosene which was used to fuel lanterns and stoves. "Before he could get kerosene out o~ crude oil, (the refiner) had to 'boil off' the gasoUne. He was glad to dispose of it at any price. Thousands of gallons of gaso- line were sold for a fraction of a cent · gallon," read an excerpt from "Oil." Even if there was a market, for gasoline, shopkeepers of the era wouldn't have stocked it sfnce it was a dangerotm and troublesome substance. In "One Hun- dred Years of Oil, A Brief History o~ the Oil Industry" (19~9) kermene was ~.!,' formed into theaulmnobil, repair shop. *It from barrels in tJm basements ol waanatm'M, therefore, for thefirst motor- ware and grocery stor~ or hal been more flanunable and easily co~andast.. The Invention o~ the autmnobile changed gasoline from unwanted byprod- ud into desirable commodity, la 18ga, Charle· Duryea placed n one-cylinder the horseless earflage wan bern. In 1~ there were Just four automol~m qm-at-. lng in the United States; by 1911 tbeve. were 600,000. It was the village smithy that early. motorists went to when thel~ Izirseless** carriages needed repairs. Aceonling to' "Oil," the blacksmith became mecfumie,: "as faithful old Dobbin. gave way to the motor car, the blacksmith shop was trans. ' butlon system with its conveniently locat- ed filling staUmm.' Many cities claim the honor o~ being Hundred Years o~ Oil" it says, "the only certsb tNng Lq that .taUona began to ~ tl~ ~.- The opening o~ new service stations kept pace with the ever-increasing hum- o/ America. In 19~, there 'were nearly 15,000 in operation; by 19~9, there were roughly ]ff0,00t - * In IS00, 'X)il"'boasted that the rdung station had reached the high plane o~ · l~ease tara to STATIONS I D11 TATIONS: Service ange ~ed from [YL_ ' men who leased their stctJons from er[eclats quickly see the big oil eompa..nies. They made gasoline and oil needs ... In their living repairing cars, and gas- Jdition there are restrooms, and oUne sales were a sideline. When oil filling station is a veritable, producing countries nationalized oU u'eau o~ information for matters' .'~mpany assets abroad, these eom- '.training to ro~ road c'ondiUona parties focused their efforts on lm- wlxalnoC" proving the sales of gasol~e in thi~ That ldgb plane ol perfection country as a way M maintaining . sted only two score. According to their ProfltoblUty.. article in Time m Aug. 2~, 1917, ' : . -. ~merieas motorL~ find that puli- s.:_Tlu~ eha.nge, forced large nun~- ! into · gas staUon cdn be a ~-,~ m. serwee staUon operators out -.; . ~ely-experience -- ne smiling . ousmess, to be __re~laced by_. o--~n~ ...._. too oltes net even an attendanL ~u-sm-v~ee gas stations. ~ ,.. -. · # . ~,ns~O, ,~ ~ I~r . ~ '.o**' ; ~_en .ti~b. disappeamt the Kern Count~ ~4us~un~ mU be a . uon W~,~ Decaase o~ '~ UI~ Deonle that m_,_g, .~ I~ way gasoline was wl~ cleaned your ~ma..,.h~ (6o6) 3e3-7427 PRO-TECH SPECIALTIES P.O. Box 11324 Midland, Texas 79702 MIDLAND, TX. (e'~S) 6aT-34;e October 20, 1990 To: From; Subj: Flora Darling 2700 M. Street Suite 300 Bakersfield, Ca. 93301 Gene Bolton P.O. Box 11324 Midland, Texas 79702 Letter of October Il, 1990 Dear Floria, Let me introduce myself. Mrs Virginia Nielsen is my mother. I have been transaating all business matters for her during the last ten months. All future correspondence should be mailed to me at the address noted above. You can FAX any information to me at 915-687-1993. The following points pertaining to our mutual prob- lems need to be listed at this time; 1. Mrs. Nielsen paid $14,100.00 to have all tanks, feeder lines, and contaminated soil removed from the property at 321 E. 18th. Street Bakersfield, Ca. New soil was transfered to this site and placed in the existing cavity. .~ HOBBS, N.M. · ~ (rms) 3e,3-7~ PRO-TECH SPECIALTIES P.O. Box 11324 Midland, Texas 79702 MIDLAND, TX. (e~5) es?-34ee 2. Mrs. Nielsen paid an attorney in Clovis, Ca. approximatl'y $5,500.00 trying to recover her money from Mr. Chet Candal- eria's Insurance Company., or his attorney. 3. No response was forthcoming from Mr. Candeleria, his Insur- ance Company., or his attorney. 4. These actions, expenditures, and non-solutions. Contributed to a partial mental and complete physical breakdown with. Mrs. Nielsen. 5. Mrs. Nielsen has no money. She exists on Social Security and her retirement check from Kern County. 6. Mrs. Nielsen contributed the very Historic Station Building to the Kern County Museum. No funds were rece&ved or wanted. 7. My late stepfather, Mr. Hans Nielsen, had a signed contract with Mr. Candeleria, (Accompanying copy) which bound Mr. Candeleria to moniter the tanks as instructed in Permit 150040C. It is obivious that this requirement was not performed. 8. Mrs. Nielsen's property Insurance has stated that Mr. Candeleria's Insurance is liable. HC~BBS, N.M. 393-7427 PRO-TECH SPECIALTIES P.O. Box 11324 Midland, Texas 79702 MIDLAND, TX. (e~ 6) 08?.,3490 9.. I certainly want to work with you in every possible way. I naturally desire to get this property into a sellable status. Mrs. Nielsen needs.the income it could produce. 10. I have'.been a contributing member of-Green peace for many years, and I believe that all poluting areas must be terminated. Keep up the good efforts. Thank you and regards CC/J.W. Neal File Gene Bolton RANDALL L. ABBOTT DIRECTOR DAV1D PRICE 111 ASSISTANT DIRECTOR RESOURCE MANAGEMENT AGENCY Environmental Health Service$ Department STEVE McCALLEY, REHS, DIRECTOR .Air Pollution Control District WILLIAM ,I. RODD¥, APCO Planning & Development Sem.,ices Department TED JAMES, AICP, DIRECTOR ENVIRONMENTAL HEALTH SERVICES DEPARTMENT October 11, 1990 Mrs. Virginia Nielsen 1001Sylmar Space 31 Clovis, CA 93612 SUBJECT: Loc at i on: Known As: Permit #: 321E. 18th Street, Bakersfield, CA Chico and the Man Gasoline Station 15O04O Dear Mrs. Nielsen: Our last communication regarding the above referenced site was February 20, 1990, when Mrs. Virginia Knudsen telephoned this office to discuss the site's status. It was our Department's understanding that you were consulting an attorney in regards to recovering costs of site characterization and possible clean-up actions from Mr. Chet Candelaria. Since our office has not received any further communication from you regarding the site, I have enclosed a copy of SB 299 (Keene), for your information. You may be eligible under SB 299 Legislation to obtain a small business loan or clean-up fund to characterize the site. Please stay in communication with this Department regarding your efforts to resolve the necessary actions needed to move this site toward closure. If you have questions you may contact me at (805) 861-3636, Ext. 549. Sincerely, x~ F1 ora Darl i ng, R.E. Ho S. · Hazardous Materials Speciali'st Hazardous Materials Management Program FD:ch darl in~I\nielsen, let 2700 "M" STREET, SUITE 300 BAKERSFIELD, CALIFORNIA 93301 (805) 861-3636 PRO-TECH SPECIALTIES P.O. Box 11324 Midland, Texas 79702 ~ber 20,--1990 Flora Darling 2700 M. Street MIDLAND, TX. (915) 687-3496 Suite 300 Bakersfield, Ca. 93301 Gene Bolton P.O. Box 11324 Midland, Texas 79702 Letter of October 11, 199 P.O. BOX 11324 MIDLAND, TX 79702 GENE BOLTON OWNER MIDLAND OFFICES 915-687-3496 TOLL FREE 800-562.5499 FAX 915-687-1993 3 Floria, Let me introduce myself. Mrs Virginia Nielsen is my ~er. I have.been transacting all business matters for during the last ten months. All future correspondence ~ld be mailed to me at the address noted above. You can any information to me at 915-687-1993. The following points pertaining to our mutual prob- need to be listed at this time; Nielsen paid $14,100.00 to have all tanks, feeder lines, contaminated soil removed from the property at 321 E. 18th. et Bakersfield, Ca. New soil was transfered to this site placed in the existing cavity. BNA CALIFORNIA ENVIRONMENT REPORTER Vol. 1, No. 2 THE BUREAU OF NATIONAL AFFAIRS, INC. November 26, 1990 HIGHLIGHTS ENVIRO~AL .CLEANUP COSTS are damages covered by insurance policies, the Cali- fornia Supreme Court rules.in a decision viewed as "pro-policyholder." In a separate action, the court 'agrees to decide the power of counties to enforce permits at hazardous waste sites (p. 25). ROADSIDE INSPECTIONS of the opacity of emissions from buses and heavy-duty trucks are ordered under rules adopted by the Air Resources Board (p. 19). OIL*EATING MICROORGANISMS indicate promise for cleaning up a 59,000-gallon diesel spill at Sandia National Laboratories (p. 20). AN ENVIRONMENTAL SUPERAGENCT for the San Francisco Bay Area is contemplated in a Bay Vision 2020 draft report (p. 28). CTIARCOAL LIGHTER FLUID is the subject of a suit by outdoor barbecue manufacturers which charges that a South Coast Air Quality Management District rule limiting lighter fluid emissions is flawed (p. 26). DAIRIES ARE TARGETED as hazardous waste sources that pollute streams as Sonoma County prosecutors settle one case brought under the Hazardous Waste Control Act and file a sec- ond one (p. 24). SMOG SEASON OZONE EX--ES fell to' historic lows this year in both the South Coast and the Bay Area Air Quality Management Dis- tricts, according to reports issued by the two districts (p. 28). MINOR MITIGATION COSTS are associated with the proposed merger of San Diego Gas & Electric Co. with Southern California Edison Co., the California Public Utilities Commission says in a ~nal environmental impact report on the merger (p. 22). GROUND WATER RECYCLING at Lawrence Livermore National Laboratory uses treated groundwater from Superfund cleanup to cool the facility's air conditioning system in an effort to trim Livermore's water use (p. 20). PARKING FEES suggested by the Bay Area Metropolitan Transportation Commission as part of a three-pronged air quality improvement plan are condemned by industry as "potentially devas- tating'' to retail centers, but branded inadequate by some environmental groups, at a hearing on the proposal (p. 27). TOUGHER AUTO EMISSIONS LIMITS will be phased in between 1993 and 1995 by the ARB under a waiver from the Clean Air Act granted to California by the federal Environmental Protec- tion Agency (p. 21). SMALL RECIPROCATING ENGINES used in utility and lawn and garden equipment could be subject to new emissions standards after hear. ings by the ARB scheduled for Dec. 13-14 in San Francisco (p. 23). OIL TANKER TRAFFIC improvement sugges- tions for San Francisco Bay are voiced during the first hearings held following enactment of land* mark oil spill prevention legislation. The sugges* tions range from deferring to federal officials to a call for a sweeping expansion of the existing vessel traffic system (p. 22). BIG GREEN'S DEFEAT does not signal a voter backlash on environmental issues, the heads of California's two leading business and environmental groups--Kirk West of the California Chamber of Commerce and Michael Paparian of Sierra Club Califor- nia--tell BNA in exclusive interviews on the election's aftermath (Interview, p. 29). ~ht · 1~90 I:)y The Bureau of National Affair~. Inc.. WashingtOn. D.C. 20037 10M-a13X/~O/IO+.SO LEGAL DEVELOPMENTS Hazardous Waste ENVIRONMENTAL CLEANUP COST8 'COVERED DAMAGES,' SUPREME COURT RULES Government-ordered environmental cleanup costs are damages covered by comprehensive general ii. ability insurance policies, the California Supreme Court ruled Nov. 15 in a unanimous pro-policyholder decision (AIU Ins. Co. v. Super/or CouFt, Calif SupO. No. S012525, 11/15/90). Ruling that insurance policy language should be construed according to '*the mutual intentions of the parties*' and its '~)lain and ordinary" meaning, resolv* lng ambiguiti*es in faVor of coverage, the supreme court overturned an appeals court decision in favor of insurance carriers (AIU Ins. Co. v. $uper~ Court of Sant~ Clara County, Caiif CtApp Sixth AppDiv, No. H005467). Attorneys for policyholders hailed the ruling as further evidence of a "pro-peiicyholder trend" across the county, but attorneys for insurance carriers pre- dicted it would result in more litigation, not necessar- ily more victories for policyholders. At issue is coverage sought by FMC Corp., a ma- chinery and chemicals manufacturer, from about 170 of its insurance companies for complying with guvern- merit cleanup orders. FMC is the defendant in actions commenced by federal and state governments under the Comprehensive Environmental Response, Com- pensation, and Liability Act (CERCLA) and similar state laws, in which the governments claim that FMC must elect to either pay the governments' cleanup costs or perform its own investigation and cleanup. Carriers' Defense Arguments Fail '~sis decision is significant nationally because this is California, a key state," FMC General Counsel Bowon H. Tucker told BNA Nov. 16. "The California court clearly confirmed that general liability policies provide coverage for the costs of waste site cleanup. The other important aspect of the decision is that the court rejected one of the carrier's key arguments that large companies--because of their size and sophistica- Uon--should not have the benefit of the same kind of policy interpretation as the normal policyholder." But carrier attorneys disputed that interpretation. "I don't think the court rejected that argument at all," said carrier attorney Barry Ostrager of the New York firm of Simpson, Thacber & Bartlett. "What the court was clearly saying was that these cases each have to be resolved on the facts." "l'he supreme court ruled exactly the same way that the appeals court ruled two .years ago in the Aero.~et case and settled the question of liability permanently in California," attorney Moses Lasky told BNA Nov. 16. Lasky, a partner in the San Francis* co-based law firm of Lasky, Haas, CoMer & Munter, represented Aerojet General Corp. in a similar cover* age dispute heard by a California appellate court which ruled for policyholders on the damages issue two years ago (Aero, et General Corp. v. Superior Court o.f San Mateo County, Callf CtApp First App- Div, 209 CalApp. 3d 973). "Since California pronounce- ments tend to affect the rest of the country, this will probably have farther reaching effects," he said. Insurers argue that the court's decision will affect all insured companies, whether or not they bare a waste problem. "Our point has been that these tempe* hies are polluters--polluters who are endangering the environment--and they should be responsible for cleaning up the mess they make," said Bill Packer, spokesman for the Association of California Insurance Companies. "By asking insurance companies to pay, you are asking the consumers--the poUcyholders--to pay for the cleanup.'* High Court Rejects 'AeroJet' Definition In interpreting policy provisions, the court ruled in its 60-page opinion that if FMC is held Uable in the underlying third-party suits, it will be "legally obUgat- ed" to pay for whatever reUef the courts order. The high court rejected the carriers' argument that in making such an award, the courts would be exercising "equitable" rather than "legal'* authority. The word "damages'* in comprehensive general U- ability (CGL) policies should be given its "plain and ordinary" meaning, the court said. It rejected the narrow, technical definition of "damages" used by the U.S. Court of Appeals for the Fourth Circuit in the pro- carrier decision, Maryland Casualty Co. v. Armco Inc. (822 F2d 1348, cert. denied 484 US 1008). The court also rejected the broad definition of dam- ages applied by the California Court of Appeals, First District, in the pro-policyholder Aerojet decision. The Aero, et court defined, damages to include "any sum expended under sanction of law." The Aero, et court said, "The insured may reasonably expect coverage for any sums expended, either at law or equity, as a result of the insured's causing property damage to another." The supreme court denied review of Aero- jet in August. The case is currently pending before the trial court on other issues. Although ruling that the statutory and dictionary definitions of damages should be used, such a defini- tion will not be appUed "inflexibly," the court said, adding that ambiguiUes would be construed to protect the "reasonable expectaUons of the insured." I 1-26.-90 BNA C~lifoml~--En~'onment Rol~r 10S2-~13x/t0~10+.50 (A) STATE CONTRACT The State Leaking Underground Storage Tank Pilot Program provides a mechanism for the State to reimburse the County for County oversight. The County will conduct the necessary oversight and bill the State Water Resources Control Board under this State contract. The State will then charge you, a responsible party, for both the costs incurred by the County and the State, pertaining to your site, under the State terms explained below: Whereas the Legislature has appropriated funds from thc California Hazardous Substance Clean-up Fund to pay the local and state agency administrative and oversight costs associated with the cleanup of release~ from underground storage tanks; and Whereas the direct and indirect costs of overseeing removal or remedial action at t he above site are funded, in whole or in part, from the Hazardous Substance Cleanup Fund; and Whereas the above individual(s} or entity(les) have been identified as the party or parties responsible for investigation and cleanup of the above site; YOU ARE HEREBY NOTIF][ED that pursuant to Section 25360 of the Health and Safety code, the Above Responsible Party or Parlies shall reimburse the State Water Resourcem Control Board for all direct and indirect costs incurred by any and all stale and local agencies while overseeing the cleanup of the above underground storage tank site, and the above Responsible Party or Parties shall make full payment of such costs within 30 days of receipt of a detailed invoice from the Slate Water Resource~ Control Board. (B) COUNTY OF KERN LOCAL AGREEMENT OPTION Kern County Environmental Health is providing this option for those who prefer to pay the County directly and avoid the addition of State costs. Prior to the County's performance of services, this option requires your deposit of $1,000.00 (one thousand dollars) with the County to be held in the Local Option Trust Account. Charges for County oversight are made against this account. In this option, a responsible party must enter into a County agreement, attachment "B". The environmental sensitivity (attachment "C") of this, site has been reviewed by Environmental Health to determine the potential threat for groundwater contamination. Only sites determined to be non-environmentally sensitive may enroll in the Local Option Agreement. The site described above is not in an environmentally sensitive area and may be enrolled in the Local Agreement Option; however, the County of Kern reserves the right to cancel any Local Agreement Option, should it be discovered that groundwater contamination or a unique, complex hydrogeological condition exists. In such cases, Environmental Health will utilize the State contract to pay for County oversight activities. The County of Kern reserves this right for any site even when the site is located in a non-environmentally sensitive area. It is necessary for you to respond, in writing, within ten (10) calendar days of receipt of this letter to advise Kern County Environmental Health of your choice: either the State contract or the County's Local Agreement Option. If you select the County's Local Agreement, please complete and sign the Local Agreement, (attachment B), and return it with your check for $1.,000.00 (one thousand dollars) made payable to the County of Kern, addressed to Kern County Environmental Health 2700 M Street, Suite 300, Bakersfield, CA 93301, Attention: Accounting - Local Agreement Option. If you select the State contract, please indicate, in writing, that you have made this selection and that you have read the above official notification. Failure to respond within ten (10) calendar days to this notice will automatically result in oversight cost recovery for your site(s) to be placed under the terms of the State contract for Leaking Underground Storage Tanks. If you should have any questions regarding this matter, please contact Susan Gonzales -at (805) 861-3636. jSteve McCalley, Director J Environmental Health ServicesDebartment attachments 'ADVANCED ENVIRONMENTAL CONCEPTS INC- Advanced Environmental Concepts, Inc. is pleased to present the following: Environmental Site Assessment Chico and the Man Service Station 23t East t8th Street County of Kern · Bakersfield, California This repod has bean prepared for: Gene Bolton, Pro-Tech Specialties · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND. January ~994 4.400ASHEROAO.#206 * BAKERSFIELD. CA93313 805/831-164.6 ,, F,~X 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. Table of Contenls '1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 '10.0 INTRODUCTION BACKGROUND SITE CHARACTERISTICS 3.1 Site Description 3.2 Regional Geology 3.3 Local Geology 3,4' Hydrogeology ASSESSMENT ACTIVITIES 4. t Decontamination Procedures 4.2 Soil Borings ANALYTICAL RESULTS FEASIBILITY STUDY 6.'1 Soils 6.2 Extent of Hydrocarbon Migration 6.3 Remediation Alternatives CONCLUSIONS RECOMMENDATIONS LIMITATIONS CLOSING PQQe I 2 2 3 3 3 3 3' 4 4 5 5 5 6 7 8 8 9 Appendices: IA] [B] ICI Project Maps/Figures Boring Logs Laboratory Reports/Chain-of-Custody Documents Prolect: AEC 94C-t4tt · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * E~AKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 1.0 INTRODUCtiON This report presents the results of o soil investigotion conducted by Advonced Environmentol Concepts, Inc. (AEC) to estimote the extent of hydrecorbon impocted soil resulting from the unouthorized dischorge of gosoline, identified following the removol of four (4) underground storoge tonk (UST) ond ossocioted plumbing. The UST wos Iocoted ot the Chico ond the Mon Service Station, 315t East 18th Street, Bakersfield, California [Appendix A, Figure t). The project was performed on. December 22. 1993, in accordance with the work plan previously designed and submitted by AEC and approved by the Kern County Environmental Health Department [KCEHD). This investigation was authorized by Mr. Gene Bolton of Pro-Tech Specialties, representing Mrs. Nelsien the property owner, and conducted under the direct supervision of Ms. Flora Darling, Hazardous Materials Specialists, Kern County Environmental Health Department (KCEHD). The subject site is located in east Bakersfield. The general area is comprised of light Industries, retail stores and related service businesses. Contained in this report Is background information regarding existing site characteristics, regional and local hydrogeological profiles, and the project history. Also included in the following sections are the objectives and scope of investigation, detailed investigative procedures, and subsequent findings. Finally, AEC provides an evaluation of said findings and makes related conclusions and recommendations. The report appendices contain project maps and figures [Appendix A), soil boring logs {Appendix BI, laboratory reports/chain-of-custody documents [Appendix C], and cross- sections depicting the horizontal and vertical extent of hydrocarbon migration [Appendix D). 2.0 BACKGROUND On April 21, 1989 Valley Tree Construction supervised the excavation, removal, and disposal of four {4] gasoline UST's from the subject site. Vew strong gasoline odors were noted in the soil during the excavation procedures. Former tank locations and sample locations are presented on Figure 2 [Appendix A). The analytical results of soil samples collected from below the removed UST are presented in Table I. Units are in milligrams per kilogram [mg/kg] which are equivalent to parts per million (ppm). Table t Analytical Results - Soil Samples Tank Removal 4121189 (ppm) Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene TH-I-2' TH-I-6' 6900 310 920 t210 220 5600 210 690 1085 190 TH-2-2' 4300 150 550 670 t40 TH-2-6' 7000 230 930 t520 280 Projecl: AEC 94C-t411 . · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MINE) 4400 ASHE ROAD. #206 · BAKERSFtELD. CA93313 805/831-1046 - FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts. Inc. Table 1 (continued} Analytical Results - Soil Samples Tank Removal 4/2 tl89 [ppm] Sample I.D, TPH-g Benzene Toluene Xylenes Ethylbenzene TH-3-2' TH-3-6 TH-4-2' TH-4-6 TH-5-2' TH-5-6 TH-6-2' TH-6-6 TH-7-2' TH-7-6' TH-8-2' TH-8-6 TH-9-2' TH-9-6 5000 85 490 t230 210 2500 15 100 472 70 ND ND ND ND ND ND ND ND ND ND ND. ND ND ND ND ND. ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Detection Limit: t.0 2.0 2.0 5.0 2.0 ND: Non-detected TPH-g: Total Petroleum Hydrocarbons as gasoline Based on these results, KCEHD required that a site assessment evaluating the lateral and vertical extent of hydrocarbon impacted soil be performed, 3.0 SITE CHARACTERISTICS The following sections summarize the project site features and conditions along with regional and local geological and hydrological characteristics. 3.1 Sile Description The Chico and the Man Service Station is located on the southwest corner of the intersection of East 18th and Sonora Streets, in Bakersfield, California. The general area is comprised of light industry and related services. The subject site is at an average elevation of 385-feet above mean sea level with minimal topographic relief. The property is presently a vacant lot. Project: AEC 94C-t4tt 2 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA 93313 805/831-1646 ,, FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 3.2 Regional Geology The subject property is located in the Southern San Joaquin Valley (Valley) which is a part of the Central Valley of California. The Valley forms the southern twa-thirds of the Central Valley and is characterized as a broad structural trough. It is bordered on the east by the Sierra Nevada Range and on the west by the Coast Range (Diablo and Temblor Mountains). The Valley extends 250 miles southeastward from the confluence of the San Joaquin and Sacramento Rivers to the Tehachapi and San Emigdio Mountains. The width ranges from 25 miles wide near the Kern River to approximately 55 miles wide near'the Kings River, with an approximate average width of 40 miles. Geology of the southern Valley consists of a Pre-Tertiary basement complex overlain by marine and non-marine sedimentary rocks of Tertiary age. These rocks are composed of consolidated sandstones, siltstones and shales which thicken from northeast to southwest. The Valley was once an inland sea of comparatively shallow depth that continued to subside due to the ever increasing load of sediments transported and deposited from higher elevations. These deposits consist of gravels, sands, silts and clays. The majority of the groundwater pumped from the Valley floor occurs within these relatively unconsolidated continental deposits. 3.3 Local Geology The investigated property is located on alluvial deposits, created from sediments transported and deposited by local streams, and during flood stages of the Kern River. The site is situated in a Iowlto moderate energy flood plain environment consisting of weakly consolidated to unc~bnsolidated, poorly bedded sands and silts. 3.4 Hydrogeology Ground and surface water in the central Bakersfield area is regulated by the Kern County Water Agency. According to the Kern County Water Agency "Water Supply Report-1990", depth to groundwater in unconfined and equivalent wells is estimated at 180-feet below grade level [BGL] at the site. No perched water bearing zones are reported in the area. 4.0 ASSE~MENT ACTIVITIES 4. t Decontaminalion Procedures Prior to initiating drilling operations, the augers and associated drilling equipment were thoroughly cleaned using a high pressure steam cleaner. In addition, the soil sampler and hand auger were washed in an Alconax solution and double rinsed in clean, deionized water prior to initial use and between each sampling interval to minimize the possibility of cross-contamination between samples. Project: AEC 94C-44t 4 3 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 , BAKERSFIELD CAg3313 805/831-1646 * FAX805/831-1771 Environmental Assessment Report Advanced Environmental Concepts. Inc. 4.2 Soil Borings On December '12, '1994 four (4] soil berings [B-'l, B-2, B-3, and B-4] were drilled on the subject property. The borings were advanced using a truck-mounted Mobile B-6'1 drill rig, equipped with 8-inch O.D. continuous flight, hollow-stem augers. Borings '1, 2, and 4 were drilled to a total depth of 60 feet BGL and boring 3 was drilled to 30 feet BGL. The borings were positioned to evaluate the vertical and horizontal extent of the hydrocarbon migration. Soil samples were collected at intervals of 5-feet in all borings commencing at '10-feet BGL. Samples were obtained by driving a thin-walled steel sampler, equipped with three [3] 2.5-inch x 6-inch brass sleeves, a minimum of '18-inches into previously undisturbed soil. The sampler was driven ahead of the augers using a '140- lb. slide hammer with a 30-inch vertical fall. Following each sample drive, the sampler was withdrawn from the borehole and the three [3] brass sleeves were removed. The bottom sleeve was retained far laboratory analysis and prepared by placing teflon tape and plastic caps over each end, then securing the caps with duct tape. The samples were labeled, placed in sealable plastic bags, recorded on a Chain-of-Custody document and placed in an ice chest cooled with blue ice. Soil exposed at each end of the center brass sleeve, and the cuttings, were examined for lithological purposes and for any obvious evidence of hydrocarbons. Lithologic descriptions (Appendix BI were logged according to the Unified Soils Classification System [USCS]. Chain-of-Custody protocol was strictly followed to ensure sample integrity and traceability. Upon completion of the above described procedures, the borings were abandoned with hydrated bentonite followed by a cement slurry to grade. 5.0 ANALYTICAL RESULTS Selected soil samples were submitted to Associated Laboratories, Inc., of Orange, California and analyzed for total petroleum hydrocarbons as gasoline (TPH-g] and volatile aromatics [BTXE] using CA DHS and EPA 8020 method, respectively. The analytical results are presented in Table 2 and the laboratory reports and Chain-of Custody are provided in Appendix C. Units are in milligrams per kilogram [mg/kg] which are equivalent to parts per million [pprn]. TABLE 2 Analytical Results - Soil Borings '121 '15/93 [ppm} Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene BI-20 ND ND ND ND ND B'1-30 ND ND ND ND ND Bt-40 '1 '1 0.80 2.0 0.93 0.t I Bt-50 '13 ND ND ND ND BI-55 19 0,08 0.15 0.06 ND BI-60 ND ND ND ND ND Project: AEC 94C-t41t 4 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 805/831-1646 * FAX 805/831-1771 Environmental Assessment Report ~,' (continued] ~J Analytical - Borings Results Soil 121t 5/93 (ppm} Advanced Environmental Concepts, Inc. Ethylbenzene Sample I.D. TPH-g Benzene Toluene Xylenes ! 82-15 / 4300 ND 2.2 380 4.3 82-25 | 2600 0.20 35 300 40 82-30 ~ 9800 V 45 V/' 910 1400 250 82-35 I ,27~ n0n0,_,'~..,/ 2.7/ 130 350 55 B2-40 '190 v 1500 2000 370 82-45 39 0.23 2.0 3.4 0.56 82-50 4.0 ND 0.85 0.20 ND 82-55 t0 0.08 0.02 0.10 0.0t 82-60 t5 ND ND ND ND I 83-20 42 / ND / ND ND ND 83-30 2700~/ 12'/ 200 340 56 84-30 70 0.11 1.5 1.3 4.4 84-50 16 ND 0.01 0.039 ND B4-60 17 0.02 O. 1 O. 16 0.02 D, L.[mg/kg) t .0 0.005 0.005 ND: Non-detected at indicated limit of detection D.L. Detection Limit 0.005 0.005 6.0 FEASIBILITY STUDY 6. t Soils The soil profile at the site consists of siltY sands, "clean" sands, and poorly sorted sands to a total drilled depth of 60 feet BGL. The silty sands (SM-ML) are commonly tan-brown, slightly to very compact, commonly friable, and slightly to moderately moist. The "clean" sands (SW) are olive gray-buff, moderately dense, unconsolidated, and slightly moist. The poorly sorted sands (SP-GC] commonly consist of olive-gray to white, moderately to. very dense, unconsolidated to very consolidated, and slightly moist. The sediments are typical of Iow to moderate energy fluvial deposits subjected to periodic reworking during fload stages. The strata were loosely compacted due to the increasing weight of the overlying sediments. 6.2 Extent of Hydrocarbon Migration Analytical results indicate that significant hydrocarbon concentrations extend to a depth of 45 feet BGL with the highest concentration, t4,000 ppm, being detected in B-2 at 40 feet BGL. Hydrocarbon levels below 100 ppm were detected in B-I and B-4, and below Project: AEC 94C-t4t I 5 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD, #206 * BAKERSFIELD CA 93313 805/831-1646 * FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. 40 feet BGL in B-2. Plume dimensions are approximately 60 feet deep by 60 feet wide and forms an nonsymetric, elongated, spheroid shape that occupies approximately 6,200 cubic yards. The highest concentrations of hydrocarbons are contained within about 785 cubic yards. 6.3 Remediafion Alternatives Advanced Environmental Concepts, Inc. recommends the following three [3] remediation alternatives for treatment of the hydrocarbon contamination located at the subject facility: I ) No-action alternative; 2] Implementation of an in-situ vapor extraction system; and 3] In-situ bioremediation of the impacted soil. Alternative ~t: The no-action remediation alternative invOlves leaving in place, the soils that exhibit hydrocarbon levels in excess of RAL, then capping the contaminated area with a relatively impermeable layer of asphalt or concrete. This alternative would require approval of the Kern County Environmental Health Department. To be eligible for this remediation alternative, the site location must satisfy specific parameters associated with depth to groundwater, site geology and contaminant concentration levels. It is unlikely that this facility will be eligible for this alternative in that the site does not satisfy the following criteria based upon the "Leaching Potential Analysis- gasoline" as outlined in the LUFT Manual: (a] Groundwater depth is estimated at 180-feet BGL (t0 points) [b) No discernible fractures (I0 points) (c) Average annual precipitation is less the 10-inches (5.72) (10 points) (d) No available man-made conduits (I0 points) (e) Coarse grained soil ( 9 points] There is a total of 49 points scored which correlates to the following maximum allowable levels of gasoline-range hydrocarbons that can be left in place; 1,000-ppm and 1/50/50/50 for TPH and BTXE constituents, respectively. The hydrocarbon concentration levels found at the subject site exceed these limits to a depth of 45-feet in soil boring B-t. Alternative ~2: The vapor extraction alternative involves the withdrawal of the volatile organic constituents from the soil matrix via a vacuum pump manifolded to extraction wells, and the subsequent destruction or collection of hydrocarbons using a regenerative thermal oxidizer or carbon adsorption. This system operates on the principle that volatile organic compounds have relatively high vapor pressures and will volatilize at ambient soil temperatures provided a reduction in pressure is applied. The treatment Project: AEC 94C-1411 6 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 805/831-1646 * FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. at the subject site would also involve injecting air into the perimeter wells to enhance the volatilization of the diesel-range hydrocarbons while oxygenating the soil and promoting natural bio-degradation. Vapor extraction is most effective and efficient in coarse grained soils (SP), although soils classified as ML [silt) also have the capability of being treated by this method. Because hydrocarbon vapors are generated by the removal process, an air emission recovery system will be required by the local Air Pollution Control District [APCD) if the hydrocarbon concentrations exceed allowable emission levels. The soil venting system is also most effective on hydrocarbons with high vapor pressures. The advantages of this treatment alternative include the ability to treat the soil in-situ, ease of installation and manifolding of the extraction wells, minimal maintenance, relatively rapid reduction in hydrocarbon concentrations, and minimal disruption of normal site operations. Alternative ~3: Bioremediation involves treating the impacted soil either aboveground or in-situ. The aboveground treatment alternative involves excavation and surface treatment of the affected soil and is more time-efficient and effective than the in- situ method. However, this discussion will center on the in-situ method because the depth of gasoline impacted soil and the proximity to the warehouse negates an excavation alternative. The in-situ treatment method involves introduction of microbes and nutrients to the contaminated soil via injection wells screened across the affected intervals. A mixing tank is placed above the well and hydrostatic head pressure allows continual percolation of biologically active fluids through the contaminated zones. The soil type is primarily a sand or silty sand and would be receptive to an active biological treatment method. However, intervals of consolidated sand are also present, which could impede the lateral migration of the microbes. To offset this effect it would be necessary to install a tight injection well pattern, which increases the treatment cost per cubic yard. 7.0 CONCLUSIONS On the basis of our investigation, AEC presents the following conclusions: a) The soil profile at the subject site generally consists of interbedded sands and silts to the total drilled depth of 60 feet. b) The analytical results indicate elevated levels of TPH-g and BTXE to a total depth of 40 feet in B-2 and B-3. TPH-g and BTXE levels are below the RAL for gasoline in soil in all other samples analyzed. c) The vertical extent of the gasoline migration appears to extend to a depth of 60 feet BGL. The lateral extent of the plume is about 60 feet. The approximate volume of the plume is 6,280 cubic yards and extends underneath a large portion of the site and probably the adjoining streets. ~ Project: AEC 94C-t411 7 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD, #206 . BAKERSFIELD, CA 93313 805/831-1646 * FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. d) The soils containing elevated levels of TPH and BTXE are separated from groundwater by approximately 140 feet. e) It is unlikely that groundwater is currently threatened by this unauthorized release. 8.0 RECOMMENDATIONS Based upon the levels and volume of gasoline-range hydrocarbons and the found in the coarse grained soil, Advanced Environmental Concepts, Inc. recommends that the vapor extraction alternative be implemented at this site. 9.0 LIMITATIONS This work has been performed in accordance with generally accepted environmental science and engineering practices. The soil samples for this project were obtained on a finite grid as directed by the on-site regulatory agency representative, hence the analytical results are indicative of discrete samples and are not meant to be misconstrued or representative of unsampled subsurface areas. Conclusions and recommendations are based upan information collected and compiled during this investigation. No other warranty, expressed or implied, is given. Project: AEC 94C-14tt 8 · ENVIrONMENT.AL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 · BAKERSF!~LD, CA93313 805/831-1646 · FAX 805/831-1771 Environmental Assessment Report Advanced Environmental Concepts, Inc. tE0 CLOSING Advanced Environmental Concepts, Inc. appreciates the opportunity to be of service to Mr. Gene Bolton on this project. If there should be any questions or additional information required regarding this report, please do not hesitate to contact our office at [805] 831-1646. This Environmental Site Assessment has been prepared by: Advanced Environmental Concepts, Inc. ~"osej~h A. Dunwoody ~-/ California Registered Geologist ~5504 This Environmental Site Assessment has been reviewed by: I I~roject Hydrogeologist tvOalifornia Registered Environmental Assessor ~1508 l)OCZZBX Project: AEC 94C-~4~ ~ 9 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Advanced Environmental Concepts, Inc.- PROJECT MAPS I FIGURES · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · ,~,snn ,,q~ n(3An *~nR · RAKI::I::I,c:;I:::IFI D C,A¢~3313 805t831-1646 ,, FAX 805/831-1771 KERN !! 81TI~ I ! BPlUNOAOE AEC ADVANCED ENVIRONMENTAL CONCEPTS P.O. BOX40672 BAKERSFIELD, CA 93384 -SITE LOCATION MAP- Chico and the Man Service Station 231 East 18th Street County of Kern · Bakersfield, CA FIGURE 1 I EAST 18th STREET TH-g TH~~ ....... FORMER PIPING I ' :' ND '"', i '-... ~ ~ [i ND } O i~ TH-4 FORMER TANK PIT ~ .:~ - m 56~ 7~ TH-1 SAMP~ I.D. ~ ........................................................................................... J ~ SAMPLE L~ATION ~ 56~ TPH-gINPPM SCA~ ADVANCED E~RONME~AL ~NCEP~ P.O. BOXY72 BAKERSFIELD, CA 9~ ~un~ of Kem· B~ersfield, California I I · · E. 18th STREET BUILDING B3 VACANT LOT · FORMER TANK PIT~ / B1 SOILBORING I. D. , . SOI LB::::: LOCATION ~,,,11 ~'-"'-"~.=~°. // II I / E~f~,~ -Soil Boring Location Map- FIGURE 231 East 18th Street 3 ADVANCED ENVIRONMENTAL CONCEPTS County of Kem· Bakersfield, Califomia P.O. BOX40672 BAKERSFIELD, CA 93384 / / E. 18th STREET ..... ~~!!~'~ ~, ~E~CE . ~ / j · SOIL BORING LOCATION SCALE ~ 1" = 10' ~ ~~~ -~xto~t o,~roaiHydrocarbonS-v,ow FIG~fi 231 East 18~ S~t ADVANCED ENV~ME~AL CONCEP~ ~.o. aox~7~ a~KERSRE~O, C~ ~ Coun~ of Kern · B~ersfield, CNEomia NORTH O O SOUTH A A' · B4 B3 B2 B1 APPROXIMATE Al :lEA OF TOTAL PLUME .,,,,..., ,...,,.,"~300 ;~; ~ I ~IIIIllllllllllllllllllllll __ ~, ~ 42 ~ ~ ND -- 20' ,,,,,,,,,,,,,,,,,,,,,,, s 13 --- 50' -"-' 10 19 '7 ~:3 TP~..!N PPM 1" = 10' I ND = NON DETECABLE SCALE / ~E~if~ -Cross Section A-A'- FIGURE Extent of Hydrocarbons - TPH-g i J Chico and the Man Service Station 5 ADVANCED ENVIRONMENTAL CONCEPTS 231 East 18th Street P.O. BOX40672 BAKERSFIELD, CA 93384County of Kem· Bakersfield, California Advanced Environmental Concepts, Inc. · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · WELL DEPTH PID ~,~,~1 PLE ID ~RVAL U.S.C.S. DETAIL (ppm) a~WCOUNT LOG LI OGIC DESCRIPTION .. 5 -- o GRAB SILTY SAND (SM): Dk yell bm, fn- ese, hrd, 60% sand, 40% fines, SM moist, no odor. -- 10 -- 0 8 I sP POORLY GRADED SAND (SP): Yell Bm, fn-med grained, 11· subang-submd, hard, medium dense, homo, moist, no odor. 15 -- 15 -- o 12 22 ~ SP SAME AS ABOVE -- 20 -- 0 12 · SP SAME AS ABOVE 30 -- 25 ~ soo 14 I SP SAME AS ABOVE 18 · -- 30 -- 7oo 10 · SANDY SILT (ML): Gm-blu, very stiff, 60% 18 ML fine grained, Iow plastic, no dry strgh, 40 20 sand, moist, homo, ~'m organles, hydrocax'oon odor. AEC, WC =ENW, ONME~r CONCE S WELL/BORING LOG lof2 , PROJECT Chlco and the Man l Gene Bolton LOCATION 231 E. 18thStreet, Bakerslleld, Cslifomla ~U~O,~Ne,O. B-1 SURFACE ELEVATION WELLHEAD ELEVATION i N/A DATE DRILLED 12/15(93 LOGGED BY J. Ounwoody REVIEWED BY J. OUNINOODY DRILUNG COMPANY' S B & S Drillln¢l_ Company DRILLER ~11~Smi~ METHOD HOLLOW STEM A_U_.G_ER_ .... BORE HOLE DIAMETER 8 INCH TOTAL DEPTH 60' DEPTH TO WATER: INITIAL NIA STATIC__N_!A_ ....... CASING TYPE DIAMETER SCHEDULE INTERVAL _N/A TO SCREEN TYPE DIAMETER SLOT SIZE INTERVAl NIA TO N/A FILTER PACK TYPE INTERVAL N/A TO __._N/A_ SURFACE SEAL TYPE Cement sand slum/over bentonite INTERVAL N/A .TO NIA NOTES · IMPLE ID WELL DEPTH PID ~RVAL I LI~wLOGIC DESCRIPTION DETAIL (ppm) SI:OWCOUNT I LOG WELL GRADED SAND (SW): Yell-bm. flne-cse grained, hard, subang-submd, med dense, homo, hydrocarbon odor. -- 35-- 700 10 · SW 18 25 ~40~ ~ 8 11 SAME AS ABOVE 18 · ML SILT WITH SAND (ML): Ok yell-bm, hard, 20% sand, fn-cs®, homo, m 50 m 50O 21 I SW WELL GRADED SAND (SW): Redishbm, fn-cse graJnedd, 50 subang.submd, very dense,homo, moist, mod hydrocarbon odor. ~55 ~ 220 6 · 12I SW SAME AS ABOVE -- 10 60 ~ 0 20 · T. D. Drilled 24I SM/ML SILTY SAND/SANDY SILT (SM/ML): Reddish 60 Feet 5o brn-dkyellbm,dnese/hard, 50% fines, 50% sand, fn-med, homo, no ~65.--~ ^F_.C P.O. BOX 40~7£ BAK~'FISFI£LO, ~OJE~? Chi~o end ~ M~n / G~r~ Bol~on LOCATIO~ Z31 fi. 18th ~, B~k~i~:l, Gl~l~ornla WELI.~BO~INO NO. ~-1 WELL PID ~IBPLE ~O U.S.C.S. DEPTH WRVAL LI,,~,LOGIC DESCRIPTION DETAIL (ppm) BD3WCOUNT LOG SILTY SAND (SM): Dk yell bm, fn- cse, hrd, 60% sand, 40% fines, m 5 m 0 SM moist, no odor. GRAB m 10 ~ 150 20 · SP POORLY GRADED SAND (SP): Yell Bm, fn-med grained, 25 subang-submd, hard, medium dense, homo, moist, no odor. 18 w 15 w l~oo sP 19 ~ SAME AS ABOVE 26 ~ 20 --' 2500 26 SP SAME AS ABOVE ~ 25 2500 45 SP SAME AS ABOVE -'~ ~0 ~ t500 t? I ML no dr~ ~mtgh, 60% fln~, 40% ~nd, fln~aa~d ~reln~l, 25I poorly s,'ted, homo, moist, organic~, strong hydrocmtx~ odor. 26 AEC WELL/BORING LOG P.O. BOX 40672 BAKERSFIELD, CA 93384 PROJECT_ChlcoandtheManlGeneBolton LOCATION 231 E. 18thS1]'eet, Bakersfleld, Cellfomla WELI.JBORING NO. B-2 SURFACE ELEVATION WELLHEAD ELEVATION N/A DATE DRILLED 12/15/93 LOGGED BY J- Dunwoody REVIEWED BY J. DUNWOODY DRILUNG COMPANY S B& S Dfllllng Company DRILLER Vern Smith METHOD HOLLOW STEM AUGER BORE HOLE DIAMETER 8 INCH TOTAL DEPTH 60' DEPTH TO WATER: INITIAL N/A_ STATIC N/A CASING TYPE DIAMETER SCHEDULE INTERVAL N/A -TO ....... SCREEN 'I~t'PE DIAMETER SLOT SIZE INTERVAl N/A__TO N/A FILTER PACK TYPE INTERVAL N/A TO .... N_/A_ .......... SURFACE SEAL TYPE Cement sand slum/over bentonite INTERVAl N/A TO N/A NOTES PID 411~PLE ~D U.S.C.S. WELL ~ERVAL LI, ....,LOGIC DESCRIPTION DETAIL DEPTH (ppm) BEOWCOUNT LOG --- WELL GRADED SAND (SVV): Yell-bm, flne-cse grained, hard, subang-submd, reed dense, homo. hydrocaflxm odor. ~ 3 5 2soo 38 · sw m 40 ~ 1900 39 [] SW SAME AS ABOVE I -- 51 , 45 m 2500 29 ~ ML SILT WITH ,SA, ND (ML): Dk yell-bm, hard, 20°4, sand, fn-cse, homo, -- 38I slrong hydrocarbon odor. ~ E,0 2300 39 · WELL GRADED SAND (SW): Redlshbrn, fn-cse grained, 48 SW subang-submd, ve~/dense,homo, moist, mod hydrocarbon odor. m 55 ~ 220 29 ~ SAME AS ABOVE 35I SW SILTY SAND/SANDY SILT (SM/ML): Redlsh m 60 ~ 0 29 I SM/ML bm-dkyellbm,dnese/hard, 50% fines, 50% sand, fn-med, homo, no T. D. Ddlled 35 odor. 60 Feet -- 45 -- 65 m AEC co~c ,r WELL/BORING LOG P.O. ~OX 40~X£ BAI~RSFIELO, CA ~ PROJECT Chico and the Man / Gene Bolton LOCATION 231 E. 18th StreW, Bakersfield, California I/VELUBORING NO. B-2 PID aBI~PLE WELL DEPTH I~ERVAL LI~r,_ LOGIC DESCRIPTION DETAIL (ppm) at33WCOUNT LOG SILTY SAND (SM): Dk yell bm, fn- ese, hrd, 60% sand, 40% fines, 5 o GRAB SM moist, no odor. ~ 10 m 0 18 I SP 22 POORLY GRADED SAND (SP): Yell Bm, fn-med grained, 35I suban~submd, hard, medium dense, homo, moist, no odor. .--15 ~ 0 22 16 SP SAME AS ABOVE ~ 20 -- 75 29 29 · SP SAME AS ABOVE 31 -~ 25 ~ 250o 28 · SP. SAME AS ABOVE 32 "30 ~ 2500 SANDY SILT (MI.): Gmblue - gry, very stiff, Iow plastic, 29 I ML no d~/stmtgh, 60% fines, 40% sand, flne-med grained, T,30 D.FeetDdlled 4035· poorly srt~d, homo, moist, organics, strong hyd~ odor. AEC P.O. BOX 40~7E BAKERSFIF~D= CA 93384 PROJECT Chlco and the Man / Gene Bolton LOCATION _231E. 18thSl~eet, Bakem'fleld, Callfomla WELL/BORING NO. B-3 SURFACE ELEVATION WELLHEAD ELEVATION N/A DATE DRILLED !-2/15/93 LOGGED BY J. Dunwoody REVIEWED BY J. DUNWOODY DRILLING COMPANY S B & S Dffillm3 Company DRILLER _~em_Smjlh METHOD HOLLOW STEM~_U_GE~ ._. BORE HOLE DIAMETER 8 INCH TOTAL DEPTH 30' DEPTH TO WATER: INmAL NIA STATIC.___~.A .... CASING TYPE DIAMETER SCHEDULE INTERVAL N/A . TO __.~A_.__ _ SCREEN TYPE DIAMETER SLOT SIZE INTERVAL NIA TO N/A FILTER PACK TYPE INTERVAL. N/A .TO __ _N/A_ ...... SURFACE SEAL TYPE Cement sand slum/over bentonite INTERVAL N/A TO N/A NOTES WELL DEPTH PID PIE ID DETAIL (ppm) BLOWCOUNT LOG LIT LOGIC DESCRIPTION ~ 5 ~ 0 SM SILTY SAND (SM): Dk yell bm, fn- cse, hrd, 60% sand, 40% fines, GRAB moist, no odor. 10 0 22 sP I POORLY GRADED SAND (SP): Yell Bm, fn-med grained, 25 subang, submd, hard, medium dense, homo, moist, no odor. ~15 ~ o 18 B SP 35 SAME AS ABOVE 20 o 28 SP 35 I SAME AS ABOVE 25 s0 SP 29 · SAME AS ABOVE m 30 m 25 39 · ML SANDY SILT (MI.): Gmblue - gry, very ~ff, Iow plestic, 44B no dry stmtgh, 60% fines, 40% sand, fine-reed grained, -- SO poorly srted, homo, moist, organics, strong hydrocm'oon odor. AEC AovA~cEo E~W,O~M ~T CO~C P= WELI. JBORING LOG 1 of 2 P.O. BOX 4087E BAKERSFIFLD, CA 93384 PROJECT Chloo and the Man lGone BoRon LOCATION 231E. 181hS~'eet, Bakersflekl, CaJlfomla WELL/BORING NO. B-4 SURFACE ELEVATION WEU. HEAD ELEVATION . N/A DATE DRILLED 12/15/93 LOGGED BY J. Dunwoody REVIEWED BY J. DUNWO~_DY DRILUNG COMPANY_ S B & S Drillin¢l Coml=any DRILLER Veto Smllh METHOD HOLLOW STEM A_UGE_R__.. SORE HOLE DIAMETER 8 INCH TOTAL DEPTH 60' DEPTH TO WATER: INmAL __N_/A____ STATIC NIA CASING TYPE DIAMETER SCHEDULE INTERVAL N~A ..... TO ..... _NJA_ .... SCREEN TYPE DIAMETER SLOT SIZE INTERVAL N/A TO N/A FILTER PACK TYPE INTERVAL NIA TO .... _NIA_ ........ SURFACE SEAL TYPE Cement sand slurry over bentonite INTERVAL NIA .TO NIA NOTES - WELL DEPTH PID ,S~KPLE ~D U.S.C.S. LI'I~-OGIC DETAIL (ppm) ~/~:)~LNT LOG DESCRIPTION ~ 3 $ ~ 180 18 [] SW WELL GRADED SAND (SW): Yell-bm, flne-cse grained, herd, 22I subang-submd, med dense, homo, hydroca~oon odor. m 40 ~ 75 29 ~ SW SAME AS ABOVE 28 m 45 ~ 75 38 I ML SILT WITH SAND (ML): Dk yell-bm, hard, 20% sand, fn-cse, homo, ~ 50 ~ 25 28 I SW WELL GRADED SAND (SW): Redishbm, fn-cse grainedd, 29 subang.submd, very dense,homo, moist, mod hydrocarbon odor. ~ 55 -- 0 6 · SAME AS ABOVE _ 42~ sW 10 SILTY SAND/SANDY SILT (SM/MI.): Reddish 60 0 20 I SM/ML bm-dkyellbrn,dne~e/hard, 50% flnea, 50% sand, fn-med, homo, no T. D. Drilled __ 24 oder. 60 Feet so[] ! AEC co~c Pr, WELL/BORING LOG P.O. BOX 40~72 BAh~FlSFl~l..~, CA ~ PROJECT Chloo and the Man I Gene BoRon LOCATION 231 E. 18th 8b'eet, Bakersfield, Callfomla WELL/BORING NO. B-4 Advanced Environmental Concepts, Inc,' ·... :.:.~. LABORATORY REPORTS/..::.. ' -.'. ::" ~"-.':.-.--' ~......:!~i:;;. ,';' . _ CHAIN-OF-CUSTODY DOCUMENTS -- :-:~ .... ,-- - :: -.. .' ;- - ,:;?:.,... -~ - . . . .; .. :. .~ '~; :,:;. · " ' "'-' :' ' -.-. : :';;..4. ',',%,,'. . . ..-. ., .. "-,, '-':'; '.:" -~ :, i : - - '"" : :!:".:.; . .." .. r- .,-,.-,,..'... ·"': ,':' ';~.'...i;-':;i/:;",:i,..i,.:~;::r?,i'.4.: :~.- · · .., '- :. , .'.,';;'; L..-..,..~. · ,.., ; .:.'.~::-.~..,'-.', " .:' ' : .'-."-- :",';""' "., · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND ASSOCiATED LABORATORIES 806 North Batavia-Orange, California 92668-714/771-6900 Advanced Environmental Concept Attn: Jon Buck 4400 Ashe Road Suite #206 Bakersfield, CA 93313 (4283) LAB NO. REPORTED FAX~4/$38-1209 G64635-01 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, CA As Submitted RECEIVED 12/16/93 B1-20' B1-30' B1-40' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline ND< 5 ND< 5 11 Benzene (mg/kg) ND< 0.005 ND< 0.005 0.80 Toluene (mg/kg) ND< 0.005 ND< 0.005 2.0 Ethylbenzene (mg/kg) ND< 0.005 ND< 0.005 0.11 Total Xylenes (8020) (mg/kg) ND< 0.015 ND< 0.015 0.93 Date Analyzed: 12/24 & 27/93 A~SOqIATED~L<~ABQ~RA~ORIES, by: Ed~S/. B~h-~re, Ph.D.~---~ vi6e-Prebident ESB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reDorts of the ~.ssociated Laboratories are confidential Droperty of our clients and may not be reproduced or used for publication in part or in full without our written permission. This is for the mutual Drotectlon of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Environmental · ASSOCiATED LABORATORIES 806 North Batavia - Orange, California 92668 - ~14/7~1-6900 CLIENT Advanced Environmental Attn: Jon Buck 4400 Ashe Road Suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED FAX ?14/538-1209 G64635-02 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, As Submitted CA RECEIVED 12/16/93 Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline Benzene (mq/kg) Toluene (mg/kg) Ethylbenzene (mg/kg) Total Xylenes (8020) (mg/kg) B1-50' 13 ND< 0.005 ND< 0.005 ND< 0.005 ND< 0.015 B1-55' 19 0.08 0.15 ND< 0.005 0.06 B1-60' ND< 5 ND< 0.005 ND< 0.005 ND< 0.005 ND< 0.015 Date Analyzed: 12/24 & 27/93 ASS.OC~ATED~A~O~~ O~IES, by: ' ESB/ql NOTE: Unless notified in writing, all by appropriate disposal protocol samples will 30 days from be discarded date reported. The reports of the Associated Laboratories are confidential property of our clients and may not be reproduced or used for publication in part or in full without OUr written permission. This iS for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCiATED LABORATORIES 806 North Bata~/a-Orange, California 92668-~14/771-6900 CLIENT Advanced Environmental Attn: Jon Buck 4400 Ashe Road Suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED F~X ~14/538.']209 G64635-03 12/30/93 SAMPLE soil IDENTIFICATION Chico & The Man 231 E. 18th, Bakersfield, BASED ONSAMPLE As Submitted CA RECEIVED 12/16/93 B2-15' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline 4,300 Benzene (mg/kg) ND< 0.005 Toluene (mg/kg) 2.2 Ethylbenzene (mg/kg) 4.3 Total Xylenes (8020) (mg/kg) 380 B2-25' 2,600 0.20 35 40 300 B2-30' 9,800 45 910 250 1,400 Date Analyzed: 12/24 & 27/93 AS $OCZATEDi~'~] 0/?TtRIES, by: ESB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reports of the Associated Laboratories are confidential property of our clients and may not De reproduced or used for DuPlication in Dart or in full without our written permission. This is for the mutual 10rotection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCIATED LABORATORIES 806 North Batavia- Orange, Calitornia 92668- YI4/FFI-6900 CLIENT Advanced Environmental Attn: Jon Buck 4400 Ashe Road Suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED FAX ~14/539-1209 G64635-04 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, As Submitted CA RECEIVED 12/16/93 Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline Benzene (mg/kg) Toluene (mg/kg) Ethylbenzene (mg/kg) Total Xylenes (8020) (mg/kg) B2-35' B2-40' B2-45' 2,700 14,000 39 2.7 190 0.23 130 1,500 2.0 55 370 0.56 350 2,000 3.4 Date Analyzed: 12/24 & 27/93 vE.dlce~Pre~si~nt ,--PI~:-~: ~" ESB/ql NOTE: Unless notified in writing, all samples will by appropriate disposal protocol 30 days from be discarded date reported. The reports of the Associated Laboratories are confidential property of our clients and may not be reproduced or used for publication in Dart or in full without our written permission. This is for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Environmental · AS$OC AIF. D LABORA R S 806 North Bata~a- Orange, California 92668- 714/771-6900 CLIENT Advanced Environmental Concept Attn: Jon Buck 4400 Ashe Road suite #206 Bakersfield, CA 93313 (4283) LAB NO. REPORTED FF~X ~14/$38.1209 G64635-05 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Man 231 E. 18th, Bakersfield, CA As Submitted RECEIVED 12/16/93 B2-50' B2-55' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline 4.6 10 Benzene (mg/kg) ND< 0.005 0.08 Toluene (mg/kg) 0.85 0.02 Ethylbenzene (mg/kg) ND< 0.005 0.01 Total Xylenes (8020) (mg/kg) 0.20 0.10 B2-60' 15 ND< 0.005 ND< 0.005 ND< 0.005 ND< 0.015 Date Analyzed: 12/24 & 27/93 Edwaf~di SI Benare, Ph.~ Vice pre~ideht by: ESB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The rel~orts of the Associated Laboratories are confidential DroDerty of our clients and may not be reDroducecl or used for Dublicatton in Dart or in full without our written Dermission. This is for the mutual brotectton of the Dublic, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCIATED LABORA]ORIES 806 Norris Batav/a- Orange, Calitornia 92658. 714/771.6900 CLIENT Advanced Environmental Attn: Jon Buck 4400 Ashe Road suite #206 Bakersfield, CA 93313 Concept (4283) Ft~X 714/538-1209 LAB NO. G64635-06 REPORTED 12 / 30 / 93 SAMPLE Soil IDENTIFICATION Chico & The Man 231 E. 18th, Bakersfield, BASED ON SAMPLE As Submitted CA RECEIVED 12/16/93 B3-20' ~3-30' B4-30' Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline 42 2,700 70 Benzene (mg/kg) ND< 0.005 12 0.11 Toluene (mg/kg) ND< 0.005 200 1.5 Ethylbenzene (mg/kg) ND< 0.005 56 1.3 Total Xylenes (8020) (mg/kg) ND< 0.015 340 4.4 Date Analyzed: 12/24 & 27/93 Ed~ ~'~g'tB ' ~a[;e ,'"--Ph. D _ Vice Presid~ by: ESB/ql NOTE: Unless notified in writing, all samples will be discarded by appropriate disposal protocol 30 days from date reported. The reports of the Associated Laboratories are confidential Droperty of our clients and may not De reDroduced or used for DuDlicetlon in Dart or in full without our written Dermission. This is for the mutual protection of the Dubtic, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ASSOCIATED LABORATORIES 806 North Batavia-Orange, California 92668-714/771-6900 CLIENT Advanced Environmental Attn: Jon Buck 4400 Ashe Road Suite #206 Bakersfield, CA 93313 Concept (4283) LAB NO. REPORTED FAX ~14/538-1209 064635-07 12/30/93 SAMPLE IDENTIFICATION BASED ON SAMPLE Soil Chico & The Mall 231 E. lSth, Bakersfield, As Submitted CA RECEIVED 12/16/93 Total Hydrocarbons (TPH DHS) (mg/kg) -Gasoline Benzene (mg/kg) Toluene (mg/kg) Etbylbenzene (mg/kg? Total Xylenes (802u) (mg/kg) B4-50' 16 ND< 0.005 0.01 ND< 0.005 0.039 B4-60' ].7 0.02 0.10 0.02 0.16 Date Analyze,-!: 12/2.1 & 27/93 ns :oc r T ESB/ql NOTE: ~nless notified in l..,r~tin~, ali By appropriate disposal protocol. samples 30 days will be discarded from date reported. 'l-l~e reDorts of the Associated Laboratories are confidential prooerty of our clients and may not be reDroctuced or used for publication in part or in full without our written oerrnission. This iS for the mutual protection of the public, our clients, and ourselves. TESTING & CONSULTING Chemical · Microbiological · Enwronmental · ~tSSOCIATED LABORATOR~ · COMMITMENT TO QUAUTY QUALITY CONTROL/QUALITY ASSURANCE REPORT G64635 QA/QC CONTROL NO. G64689 INSTRUMENT LOGBOOK Hyd 1-6 DATE G64689 ANALYZED Dec 23 1993 I.L.B. PAGE LOCATION 53 DATE G64635 ANALYZED Jun 23 1993 SAMPLE LOG PAGE LOCATION 35 EPA 8020 REPORTING UNITS mE/kg SAMPLE MATRIX soil COMPOUND SR SA1 RPD S.A. SSA $$R1 %RE %REI RPD BLK BENZENE 0 0 0 0.05 0.054 0.046 108 92 16 0 ' irOrv£t~r:.i~ ~...,..::'~.i.'.: io". o.:.. O. "" b. o5 '0.05~. ."'"" ':"'"'"':'"" "'"':~:': '"":"": ~ ' , 0.051'i:!' :110..i:i:'.:!.::.:' I02'./!:::i::.i.!:!.' ZS.:' .... ETHYLBENZENE 0 0 0 0.05 O. 052 0.048 104 96 8.8 0 XYLENE$ 0 0 0 O. 15 O. 16 O. 149 107 99 7. 8 0 cHLoROBEIgZF'NE . . .. :' : :. :~ 1,2-DICItLOROBENZENE 1,3-DICHL OROBENZENE J , 4-D ICHL O ROBENZENE AvE 6E lo ] I l I lO SR ....... SAMPLE SRI ..... SAMPLE DUPLICATE RPD---- RELATIVE PERCENT DIFFERENCE S.A.---- ANALYTE SPIKE IN SAMPLE MATRIX SSA ..... SPIKE RECOVERED AND SAMPLE 'SA' SSR I .... SPIKE RECOVERED AND SAMPLE 'SRI' "~,RE .... PERCENT RECOVERY OF SPIKE IN 'SR' %REI--- PERCENT RECOVERY OF SPIKE IN 'SRI' BLK ..... ANALYTE CONCENTRATION DETECTED IN LAB BLANK 99% ..... UPPER/LOWER CONTROL LIMIT 95% ..... UPPER/LOWER WARNING LIMIT s .......... STANDARD DEVIATION 2s ........ 2 x STANDARD DEVIATION (WARNING LIMIT) 3s ........ 3 x STANDARD DEVIATION (CONTROL LIMIT) MEAN-- TIME WEIGHTED AVERAGE OF SPIKE RECOVERY SURROGATE SPIKE DATE BENZENYL FLUORIDE SPIKE CONCENTRATION OF 150 ng WITH A RECOVERY OF 79 % BENZENYL FLUORIDE RECOVERY LIMITSOFIil % TO 129 % PASS / NO PASS /,~J~ DATE TYPED Dec 29 1993 AI33201 ACTION TAKEN SPIKE SOURCE EPA Repository' Dil. STANDARD LOT NO. BTX 40893 ANALYST Rick Corm QA / QC COMPILER ~'~,.,~,e- // [tSSOCIA TED LABORATORI · COMMIIMENT TO QUAI. JTY QUALITY CONTROL/QUALITY ASSURANCE REPORT G64635 QA/QC CONTROL NO. G64689 INSTRUMENT LOGBOOK Hyd 1-6 DATE G64689 ANALYZED Dee 23 1993 I.L.B. PAGE LOCATION 53 DATE G64635 ANALYZED Dee 23 1993 SAMPLE LOG PAGE LOCATION 35 EPA 8015M/D.H.S.L.U.F.T. REPORTING UNITS mg/kg SAMPLE MATRIX soil COMPOUND SR SRI RPD S.A. SSR SSR1 %RE %RE1 RPD BLK GASOLINE 0 0 0 5 5.4 5.7 108 114 5 0 DIESEL. .. " AVENGE [0 I I'°s I''4 I 5 I SR ....... SAMPLE X O SRI ..... SAMPLE DUPLICATE RPD---- RELATIVE PERCENT DIFFERENCE S.A.---- ANALYTE SPIKE IN SAMPLE MATRIX SSR ..... SPIKE RECOVERED AND SAMPLE SSRI .... SPIKE RECOVERED AND SAMPLE 'SRl' %RE .... PERCENT RECOVERY OF SPIKE IN 'SR' ~REI--- PERCENT RECOVERY OF SPIKE 1N 'SRI' BLK ..... ANALYTE CONCENTRATION DETECTED IN LAB BLANK 99% ..... UPPER/LOWER CONTROL LLMrr 95~.-~--- UPPER/LOWER WARNING LIMIT s .......... STANDARD DEVIATION 2s ........ 2 x STANDARD DEVIATION 03/ARNING LIMrr) 3s ........ 3 x STANDARD DEVIATION (CONTROL LIMIT) MEAN-- TIME WEIGHTED AVERAGE OF SPIKE RECOVERY SURROGATE SPIKE DATE BENZENYL FLUORIDE SPIKE CONCENTRATION OF WITtt A RECOVERY OF BENZENYL FLUORIDE RECOVERY LIMITS OF TO PASS / NO PASS ~ ~ DATE TYPED Dee 29 1993 B133201 ACTION TAKEN/I SPIKE SOURCE SH-R STANDARD LOT NO. Gas 52093 ANALYST Danielle Lt,jan QA / QC COMPILER /J/2~..-~,-/ CHAIN-OF-CUSTODY RECORD Proiecl~ Name , Client Project# Turn Around R~uest~: ~ ~b Use Only. CHAIN-OF-CuS', ,JL~ ... reject Name Client Project# ~ . ~/~ ~ ~ ~/v~... ~j ,~. z_o, ,,, ~_. Project Address 2 ~"/-/J .~'A Turn Around Requested: ~..~ . Lab Use Only. , , = ~ ~ Sampte Condition J~ 48-Hour-Rush .. , . O Chilled Yes / No Saw, eCs Si. ?a[ure J~j Mobile Lab ~. ,'~"~.~, , Sealed Yes / No !g;,5 - 3o ~ ~i~is~ ~: (SignOre) D~e 0 R~v~ by ~rm~: (SignOre) Date I · ADVANCED ENVIRONMENTAL CONCEP .. C~: ~me ~m~: Time ~/831-I~6 ~E =ADVANCED ENVIRONMENTAL CONCEPTS INC= August 19, 4994 Ms. Flora Darling Kern County Environmental 'Health Department 2700 "M" Street, Suite 300 Bakersfield, California 93304 Regarding: Vapor Extraction Work Plan for Gasoline Impacted Soil Chico and the Man Service Station 23~ East ~ 8th Street Bakersfield, California Dear Ms. Darling: Advanced Environmental Concepts, Inc. [AEC] has prepared the Environmental Site Assessment Report for the above referenced project/location. Enclosed please find that report, which AEC is submitting for review. Should you have any questions or require clarification on any aspects of the enclosed, please do not hesitate to contact our office at [805] 8314646. Respectfully yours, Advanced Environmental Concepts, Inc. Attachments: Report[II Distribution: LETR34CG Addressee Mr. Gene Bolton Bksfld File · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA93313 805/831-1646 · FAX805/831-1771 /i J 5 ~'~ - VadOSecompletlon ZonesW~ell Locations- FIGURE E. lm 611~;ET BUll. DING VACANT LOT / v~e .~_ "111111! ~ EXT~C~N WEU. · ~.L;rWSLL 1"- 10' AEC - Vadose Well Location Map.- County ~f Kern · Belmrdb~ ~elilamh. FIGURE 2 mADVANCED ENVIRONMENTAL CONCEPTS INCm Advanced Environmental Concepts, Inc. is pleased to present the following: Vapor Extraction Work Plan for Gasoline Impacted Soil Chico and the Man Service Station 23t East t 8~ 5't~eet Countyof Kern · Bakersfield, California This work plan hc,~; 13CCh prepared for: Gene Bolton, Pro-Tech Specialties Prepared: June ~904 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4.400 ASHE ROAD. #206 ., BAKERSFIELD. CA93313 805/831-1646 · FAX B051B31-1771 Vapor Extraction Work Plan Advanced EnVironmental Concepts, Inc. Table of Contenls INTRODUCTION '1 .t Purpose t .2 Scope of Work 1.3 Schedule Parle I 2.0 BACKGROUND 3.0 WORK PLAN 3.1 Well Locations and Depths 4 5 4.0 METHODS 4."1 4.2 4.3 4.4 4,5 4.6 4.7 5 Boring Methods 5 Soil Sampling 5 Field Screening of Soil Samples 6 Soil Analysis 6 Installation of Vapor Extraction Wells 6 Source Testing 6 Regenerative Thermal Oxidizer Operation 7 5.0 SITE SAFETY PLAN 6.0 REMARKS / SIGNATURES 9 Fioures: 1] 2} 3] 4} Site Location Map Site Map/Well Locations Cross Section/Screened Intervals Vapor Extraction Well Design Appendices: A] B) Health and Safety Plan Material Safety Data Sheets Project: AEC 94C-~464 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Vapar Extraction Work Plan Advanced Environmental Concepts, Inc. t.0 INTRODUC11ON Mr. Gene Bolton, of Pro-Tech Specialties and representing Mrs. Nelsen, owner of the property, has authorized Advanced Environmental Concepts, Inc. (AEC) to prepare the following work plan for ~he remediation of gasoline-impacted soil via vapor extraction at the Chico and the Man Service Station facility (Figure t]. The site address is 231 East 18~ Street, Bakersfield, California. The lead agency for this project is the Kern County Environmental Health Services Department (KCEHSD], represented by Ms. Flora Darling, Hazardous Materials Specialist. Specific locations of the borings drilled during AEC's investigations and the proposed vapor extraction wells are shown on Figure 2. 1 .t Purpose The soil remedlatlon program described in this work plan has the following objectives: · Install four vapor extraction wells proximal to the center of the gasoline plume and three inlet wells outside the plume; · Manifold the vapor extraction unit (internal combustion/catalytic converter/carbon canister] to the wells and conduct the Soil remediation program. 1.2 Scope of Work The scope of services described in this work plan include: Locating underground utilities using available property owner information as well as the Underground Service Alert [USA]. Advancing seven soil borings in the vicinity of the former underground storage tanks JUST'si and completing them as vapor extraction/inlet wells. Vadose wells will be advanced to depths between 25 and 60 feet BGL. The augers will be steam-cleaned prior to drilling the barings to avoid cross-contamination. Soil samples will be collected at predetermined depths to be evaluated in the field. As planned, samples will be collected at approximate 5-foot intervals to total depth in each well. The samples will be collected using a standard California split-spoon sampler. Brass tubes will be steam- cleaned prior to use. The samples will be field-screened and selected samples will be chosen for chemical analysis. Field-screening will be accomplished using a photoionization detector (PID] with a 10.0 eV lamp. Soil samples for chemical analyses will be collected In brass tubes and sealed with end caps and tape.' The sealed tubes will immediately be Project: AEC 94C-1464 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND Vapar Extraction Work Plan Advanced Environmental Concepts, Inc. o placed in a cooler chilled with Blue Ice to be .transported to a State- certified labaratory 'under chain-of-custody protocol. Selected soil samples will be analyzed for total petroleum hydrocarbons as gasoline [TPH-g] and volatile aromatics [BTXE], using EPA methods 8015 Modified and 8020 respectively. Vapor extraction wells will be installed in the soil barings according to the design illustrated in Figure 4. Field baring logs will be prepared as will the vapor extraction Well construction details. Install and operate the vapor extraction system (VES) as described In Sections 3 and 4. Install a security enclosure around the vapor extraction equipment. Prepare a final report which describes the results of the soil investigation and mitigation. Data included will be drilling methods, sampling methods, chemical analytical results, and conclusions. A summary of the installation and operation of the vapor extraction system will also be' presented. t .3 Schedule Advanced Environmental Concepts, Inc. anticipates beginning the work described in this work plan within two weeks of approval by KCEHSD and authorization to proceed from Mr. Gene Bolton. Drilling will commence only after applicable county permits have been obtained. The soil borings are expected to be completed within one week of mobilization to the site. Installation of the vapor extraction wells in the soil borings will be completed concurrently. Pending approval to construct and operate the VES by the Kern County Air Pollution Control District, AEC will install the VES unit. Remediation is expected to take approximately six months once vapor extraction is initiated. Periodic vapor testing will be conducted to monitor progress. If such testing indicates remediatian has been accamplished within a shorter time frame, a confirmation boring will be advanced. Once laboratory confirmation of remediation is obtained and found to be within KCEHSD guidelines, the VES equipment will be disengaged. Equipment removal is expected to be accomplished within two weeks of confirmation of remediation. A final report will be prepared summarizing all field remedial operations and laboratory results. The report will be provided within one month of mitigation. 2.0 BACKGROUND On April 21, 1989 Valley Tree Construction supervised the excavation, removal, and disposal of four [4) gasoline UST's from the subject site. Very strong gasoline odors were noted in the soil Project: AEC 94C-t464 2 ·ENVtRONMENTAL CONCEPTS W~TN DESIGN ;N MiND Yapor Extraction Work Plan Advanced Environmental Concepts, Inc. Sample I.D. TPH-g Xylenes Ethylbenzene during the excavation procedures. Former tank locations and sample locations are presented on Figure 2 (Appendix A). The analytical results of soil samples collected from below the removed UST are presented in Table t. Units are in milligrams per kilogram [rog/kg] which are equivalent to parts per million [ppm]. Table t Analytical Results - Soil Samples Tank Removal 412tl89 Lopm] Benzene Toluene TH-I-2' 6900 310 920 1210 220 TH-t-6' 5600 210 690 1085 190 TH-2-2' 4300 t50 550 670 140 TH-2-6' 7000 230 930 1520 280 TH-3-2' 5000 85 490 1230 . 210 TH-3-6' 2500 15 100 472 70 TH-4-2' ND ND ND ND ND TH-4-6' ND ND ND ND ND TH-5-2' ND ND ND ND ND TH-5-6' ND ND ND ND ND TH-6-2' ND ND ND ND ND TH-6-6' ND ND ND ND ND TH-7-2' ND ND ND ND ND TH-7-6' ND ND ND ND ND TH-8-2' TH-8-6 TH-9-2' TH-9-6 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Delectio~ Umit: t.0 2.0 2.0 5.0 2.0 ND: TPH-g: Non-detected Total Petroleum Hydrocarbons as gasoline Based on these results, KCEHSD required that a site assessment evaluating the lateral and vertical extent of hydrocarbon impacted soil be performed. On December 12, t993, four (4] soil borings (B-l, B-2, B-3, and B-4) were drilled on the subject property. The borings were positioned to evaluate the vertical and horizontal extent of the hydrocarbon migration and advanced using a truck-moUnted Mobile B-61 drill rig, equipped with Project: AEC 94C-1464 3 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #200 · BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. 8-inch O.D. continuous flight, hollow-stem augers. Borings 1, 2, and 4 were drilled to a total depth of 60 feet BGL and boring 3 was drilled to 30 feet BGL. Selected soil samples from these borings were submitted to Associated Laboratories, Inc., of Orange, California and analyzed for total petroleum hydrocarbons as gasoline (TPH-g] and volatile aromatics [BTXE] using CA DHS and EPA 8020 method, respectively. The analytical results are presented in Table 2. Units are in milligrams per kilogram [mg/kg], which are equivalent to parts per million [ppm]. TABLE 2 Analytical Results Soil Borings t2115/93 [ppm} Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene Bt-20 ND ND ND ND ND B1-30 ND ND ND ND ND BI-40 1 t 0.80 2,0 0.93 0.11 BI-50 13 ND ND ND ND Bt-55 19 0.08 0.15 0.06 ND BI-60 ND ND ND ND ND B2-15 4300 ND 2.2 380 4,3 B2-25 2600 0.20 35 300 40 B2-30 9800 45 910 1400 250 B2-35 2700 2.7 130 350 55 B2-40 14000 190 1500 2000 370 B2-45 39 0.23 2.0 3.4 0.56 B2-50 4.6 ND 0.85 0.20 ND B2-55 10 0.08 0.02 0.10 0.01 B2-60 15 ND ND ND ND B3-20 42 ND ND ND ND B3-30 2700 12 200 340 56 B4-30 70 0.11 1.5 1.3 4.4 B4-50 16 ND 0.01 0.039 ND B4-60 17 0.02 0.t 0.16 0.02 D. L,[mg/kg] t .0 0.005 0,005 ND: Non-detected at Indicated limit of detection D.L. Detection Limit 0.005 0.005 3.0 WORK PLAN Advanced Environmental Concepts, Inc. proposes to install seven vadose wells in the hydrocarbon plume area to effect remediation. These wells will be manifolded below grade and equipped with traffic boxes to protect the wellheads. Each well will be equipped with a valve which permits configuration as either an ambient air intake or a vapor extraction well. The Project: AEC 94C-1464 4 · ENVIRONMENTAL CONCEPTS WITH DESIGN tN MiND · 4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 805/831-164(5 * FAX 805/831-1771 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. manifolding will be connected to an aboveground internal combustion/catalytic converter vapor extraction unit. 3. t Well Locations and Deplhs A total of 7 vadose wells will.be installed at the subject site. ~will be installed with in the hydrocarbon plume to s_e_~ve as extraction wells and three Inlet wells outside the plume. The extraction wells will be constructed as nested wells and completion zones will be stagg~¥ed in such a manner that covers the entire plume area. The inlet wells will be screened at intervals that allow them to service the entire plume. Vadose well locations are plotted on Figure 2. Well positions and screened intervals are presented in cross sectional view on Figure 3 and a typical well construction diagram is shown on Figure 4. 4.0 METHODS The methods to be employed during implementation of the above scope of work are described in the following sections. 4.1 Boring Methods The borings will be advanced using a Mobile Drill B-61 rig, or equivalent, with a 10-inch diameter, hollow-stem, continuous-flight auger in accordance with ASTM Method D 1452-80 for soil investigations and sampling by auger borings. At no time shall any water or other liquid be added to the boring. The augers will be steam-cleaned prior to drilling the borings. The lithology and other pertinent data will be recarded on a field boring log in accordance with ASTM Method D 2488-84 for visual description and identification of soils. Cuttings from the borings will be placed in appropriate 55-gallon containers or on sheets of plastic and covered until verified with analytical results, whether or not the soil is contaminated. Project: 4.2 Soil Sampling Soil samples will be collected through the auger In 2-inch diameter by 6-inch long brass sleeves driven in a split-spoon sampler by a 140-pound hammer with a 30-inch drop in accordance with ASTM Methods D t586-84 for split-barrel sampling of soil and D 1587-83 for thin-walled tube sampling of soils. The brass sleeves and sampler will be washed in a trisodium phosphate (TSP) or Alconox solution and rinsed in clean, deionized water prior to each use. Soil samples will be collected at selected depths in each boring in order to provide baseline data and confirm prior laboratory results. The total depth of VE-2 will extend to 5 feet below the last detected indication of contamination. The blow counts, recovery, and lithology will be recorded on the field logs. Lithology will be described in accordance with ASTM Method D 2488-84 [Standard Practice for Description and Identification of Soils). Selected soil samples will be sealed with Teflon tape, capped, sealed with duct tape, labeled in accordance with EPA protocols, recorded on a chain-of- custody document, placed in a cooler chilled with Blue Ice at 4-degrees centigrade, and AEC 94C- 1464 5 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MiND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA93313 805/831-1646 · FAX 8051831-1771 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. transported to a State-certified laboratory with the chain-of-custody for the specified analyses. 4.3 Field Scrccning of Soil Samples Soil samples will be collected using three 6-inch brass tubes installed inside a split-spoon sampler. The middle sample tube will be immediately capped and stored in an iced cooler upon collection. The bottom tube will be used for lithologic description, and the top tube will be used for field screening. The soil collected in the top tube will be capped, and a headspace reading will be obtained using the PID. The standard headspace reading will be noted on the boring log. 4.4 Soil Analyses The soil samples will be analyzed by a California-certified laboratory utilizing State guidelines and EPA protocols. The samples will be analyzed for total petroleum hydrocarbons as gasoline by EPA method 8015 [Modified), and volatile aromatic organics by EPA method 8020. 4.5 Installation of Vapor Extraction Wells The vapor extraction wells will be constructed as shown on Figure 4 and installed in the following manner: The 2-inch, schedule-40, polyvinyl chloride {PVC) pipe will be flush- threaded and steam-cleaned prior to installation. Approximately 30 feet of 0.040-inch slotted PVC, an end cap, and sufficient blank casing to reach the surface will be installed through the auger. Aquarium sand will be poured down the auger while removing five feet of auger at a time. The filter pack will be placed two feet above the screened interval. Three feet of bentonite pellets will be poured and then hydrated to form a seal. The well-cover traffic boxes will be set in cement. The traffic boxes, control valves, and VES manifolding will be set in accordance with standard practice. 4.6 Source Testing Prior to obtaining a Permit to Operate the regenerative thermal oxidizer on a full time basis, a source test will be required to collect data demonstrating that the air flow from the effluent stack does not present a health and safety concern to the site employees or nearby population. The vapor extraction source test will consist of removing hydrocarbon laden vapors from the extraction wells for an anticipated period of 24 hours to achieve a steady state flow condition. Flow rates, organic vapor concentrations, and vapor temperature will be measured at the extraction wellhead, then recorded. The flow rate, vapor pressure, and vapor temperature of the blower influent and effluent will also be measured and recorded. Vapor samples will be obtained from the influent sampling ports and from the stack sampling port. Project: AEC 94C-1464 6 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #200 * IBAKERSFIELD. CA93313 805/831-1640 * FAX805/831-1771 Yapor Extraction Work Plan Advanced Environmental Concepts, Inc. Flow rates will be measured using manometers, installed at the extraction wellhead and blower influent. Pressure will be measured with a vacuum gauge at the extraction wellhead, and at blower influent and effluent sample ports. Yapor temperature will be measured with dial thermometers installed at the extraction wellhead, and blower influent. Vapor samples will be collected at the systems influent sampling port and at the effluent sampling port on the stack. Samples will be collected in Tedlar sampling bags and analyzed for tota~ petroleum hydrocarbons as gasoline (TPH-g) and volatile aromatics (BT×E). 4.7 Regenerative Thermal Oxidizer Operation The regenerative thermal oxidation system is designed for continuous operation 24 hours per day, 7 days per week until acceptable hydrocarbon levels have been achieved. The anticipated duration of this project is estimated at 6 months from the beginning of the extraction of vapors. The airNOC stream enters the YES via a 4 inch flanged connection. The entrainment separator/silencer is the first component within the process. Noise is also ,reduced before the air/VOC stream enters the vacuum pump. The flow, under positive pressure of approximately 37" of water column, passes over an LEL sensor [AT1], flow measuring device [FEI, DP1], and a static pressure measuring device [P$I ]. The LEL sensor is used to purge the system, and in some cases shut the entire system down. ATt, FEt, and DPI are used to calculate total pounds of VOCs destroyed and give valuable Information concerning soil and well conditions. Static pressure is monitored to indicate blockages in the system. After the aforementioned instrumentation, the process stream enters the oxidizer Ia bed filled with silica gravel). The oxidizer contains silica gravel with heating elements located In the center and perimeter. The main operating principles of the oxidizer are the thermal properties of the silica gravel and bi-directional flow. The oxidizer has flow ports at the top and boltom. The air/VOC process stream enters from one end of the oxidizer before entering the section of the oxidizer that contains the heating elements. After oxidation, the process stream exits through the opposite port. To capture the heat generated by the oxidation process the directional flow is switched by pneumatically actuated valving. Thus, what was the exit port now becomes the entrance port. The incoming air/VOC stream absorbs the thermal energy off of the silica gravel, and is close to oxidation temperature before entering the section of the oxidizer which contains the heating elements. The process stream exits the oxidizer via a 4" diameter stack. The hydrocarbon destruction efficiency of a regenerative thermal oxidation unit is in excess of 99% based on informatian relayed to AEC by the equipment manufacturer XIT Technologies. Emissions will be monitored daily during the first week of operation and weekly thereafter until project completion. Inlet vapor concentrations will be monitored continuously using an LEL sensor and cross-checked using a hand held GasTech LEL vapor sensor. Dilution air will be added manually to control the LEL and as remediation Project: AEC 94C-t464 7 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #200 * BAKERSFIELD. CA93313 805/831-1646 ° FAX 8051831-1771 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. progresses the volume of dilution air required will be reduced and the hydrocarbon laden vapor will be more efficiently extracted. 5.0 SITE SAFETY PLAN A Site Safety Plan is included as Appendix A which complies with Worker Right-to-Know Regulations and CAC Title 26. Material Safety Data Sheets are presented in Appendix B. Project: AEC 94C-~464 8 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 · I~AKERSFIELD. CA93313 805/831-1646 · FAX 8051831-1771 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. 6.0 REMARKS / SIGNATURES This work plan represents the professional opinions of Advanced Environmental Concepts, Inc. These opinions are based on currently available data and were arrived at in accordance with accepted hydrogeologic and environmental engineering practices. No other warranty, expressed or implied, is given. This work plan has been prepared by: Advanced Environmental Concepts, Inc. This work plan has been reviewed by: DOCI6DZ Project: AEC 94C-1464 9 · ENVF~ONMENTAL CONCEPTS WiTH DESIGN IN MIND 4400 ASHE ROAD. #200 · E~AKERSFIELD. CA93313 805/831-1640 * FAX 805/831-1771 Advanced Environmental. Concepts. Inc. · ENVIROiNMENTAL CONCEPTS WITH DESIGN IN MII~D * ~ .,. ~ 6 -', ....... ._~ ~ ~ . ~'k~ L- - ~': ~ ,-~, t ; : ..- f. ...... ,m ,k Av ,~._~""~_ ~ ~ =~ , ~ ~ .== ....... , ~ --~ ..... ~ .... + , ~1 ~g~l~=ll ___1~. ~ '~ ~ d ~, ,l I~l~lW ~ ~ z ~ .~ j 1] ~ ]~ -j I I I I~ ,' . mI I I ~~ - . ~ . _- .... ~ ~ - ,. ..... c m I ... I ... ~ 4 ~ ~l , ~ . · ~ ~ ~~~ ~ ~ , , i .... ."~ '~-.~' :<.~ ,vi ~ , ~ ~ "" ~ I ' ';;~% '-..:".,~.':, ~ ~-} m /~ '~ ~'~ ~ I I ADVANCED E~RONME~AL ~NCE~ ~.o. sox~= ~RS~E~, CA ~ ~un~ of Kern · B~er~eld, C~ffomla __e_ · -/ IIIIIIIIII1' Ijelj .111111111111IIIIIIII . ~JlJ~j~Jllllllll iiiIl BUILDIN8 / VE.,4~ J ~ ::::::::::::::::::::: . FORI~ TANK Prr ~ ~ · / ~ 1''10' I 231 Emit lmll Street I I ! ,' ~~ i :- : IME ,,,.., ,.......,,~'~ i~ R~ED I~V~ . = / T fllJllllJllflllllllllllllllllllffllllflll~l'*~ I ~1'-1~ I ~ ~~ ~~ - VndoSOmm.~,~ ~Well~ Lom~on~- FIGUHE 231 F.s~181h Street 4 P.O. BOX 4OE'~ B~G~V~:~.~ CA ~884 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN' MIND · Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. Health .& Safety Plan for Chico and the Man Service Station 231 East 18m Street County of Kern · Bakersfield, California Introduction: A Site Safely Plan [SSP] has been designed to address safety provisions needed during the site soil assessment / remedlation. Its purpose is to provide established procedures to protect all on-site personnel from direct skin contact, inhalation, or ingestion of potentially hazardous materials that may be encountered at the site. The SSP establishes personnel responsibilities, personal protective equipment standards, decontamination procedures and emergency action plans. Advanced Environmental Concepts, Inc. seeks to enter the Chico and the Man Service Station property for the purpose of drilling, soil sampling, and well installation. Soil samples will be collected during drilling operations. Each sample to be chemically analyzed will be collected in a brass sleeve, capped with lined plastic lids, sealed with tape and placed on Ice in a chilled cooler. Chain-of-custody protocol will be followed. Drilling equipment will be transported to the site and operated by: S B & S Environmental Drilling 3022 West Santa Ana Fresno, California 93722 Contractor's License *'560175 This SSP describes means for protecting all on-site personnel from contamination or personal injury while conducting drilling and installation activities. As described below, we will strive to meet all requirements promulgated by the California Department of Health Services. Responsibilities of Key Personnel: All on-site personnel have been assigned key responsibilities. Mr. Jonathan Buck will serve as Project Manager and on-site Geologist. He will also serve as Site Safely Officer (SSO]. As SSO, Mr. Buck will assure that on-site personnel have received a copy of the SSP. Personnel will be required to document their full understanding of the SSP before admission to the site. Compliance with the SSP will be monitored at all times by the SSO. Appropriate personal protective equipment, as listed below, will be available and utilized by all on-site personnel. Prior to beginning work, the SSO will conduct a training session to assure that all personnel are aware of safe work practices. In the training session, personnel will be apprised of hazards at the site. The SSO will utilize Material Safety Data Sheets for information on compounds to be encountered. Project: AEC 94C-1464 I Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. Mr. Buck will also be responsible for keeping field notes, collecting and securing samples, and assuring sample integrity by adherence t° chain-of-custody protocol. .All on-site personnel will take reasonable precautions to avoid unforeseen hazards. After documenting their understanding of the SSP, each on-site employee will be responsible for strict adherence to all points contained herein. Any deviation observed will be reported to the SSO and corrected. On-site employees are held responsible to perform only those tasks for which they believe they are qualified. Provisions of this SSP are mandatory, and personnel associated with on-site activities will adhere strictly hereto. Job Hazard Analyses: Hazards likely to be encountered on-site include those commonly encountered when operating any mechanical equipment, such as the danger of falling objects or moving machinery. Simple precautions will reduce or eliminate risks associated with operating such equipment. An excavation contractor has been employed to deliver and operate all excavating equipment. Qualified personnel only will have any contact with this equipment. All on-site personnel, including the excavation contractor and his employees, are required to wear hard hats when in close proximity to excavating equipment. Latex sampling gloves will be worn by persons collecting or handling samples to prevent exposure to contaminants. Gloves will be changed belween samples. Used gloves are discarded in order to avoid cross-contamination. Proper respiratory equipment will be worn if vapor contamination levels on-site exceed State-mandated action levels: a photoionlzation detector will be used for this purpose. The action level requiring respiratory apparatus will be 5 ppm in the breathing space. Furthermore, no smoking, open flames, or sparks will be permitted on-site. Risk Assessment Summary: Exposure to chemicals anticipated on-site include gasoline, benzene, toluene, and xylenes [BTX]. These chemicals represent hazards because they are moderately to extremely toxic, and most are highly flammable. Threshold Limit Values ['rLV's), Short Term Exposure Limits (STEL's] and Toxicity levels (LD50, oral-rat], all In mg/kg [ppm], are listed below: Compound TLV STEL Toxici~ Gasoline 200 300 .... Diesel 50 75 .... Benzene 10 2,5 4894 Toluene t00 150 5000 Xylene 100 150 4300 Benzene is a known carcinogen. Project: AEC 94C-1464 2 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. Exposure Monitorin Plan: A PID will be used to monitor vapor concentrations around the site. Should concentrations exceed TLV's, protective measures will be taken. Passive dosimeter badges will be placed in downwind locations if PID readings indicate high levels of volatile organics in the breathing space. Personal Protective Equipment: On-site personnel will have access to respirators with organic vapor cartridges. Replacement cartridges will be available on-site as needed. When handling samples, the on-site Geologist will wear latex gloves. Hard hats will be worn by all on-site personnel when in proximity to drilling equipment. Work Zones and Security Measures: Access to the site will be restricted to authorized personnel. A set of cones, placards, or wide yellow tape surrounding the site will define the perimeter, if needed. The Project Manager will be responsible for site security. Decontamination Measures: Avoidance of contamination whenever possible is the best method for protection. Common sense dictates that an-site personnel avoid sitting, leaning or placing equipment on possible contaminated soil. All persannel will be advised to wash their hands, neck and face with soap and water before taking a break or leaving the site. Respirators will be washed with soap and water follawing each day's use. Excavation and sampling equipment used will be decontaminated by steam-cleaning. Sampling equipment will be decontaminated before each sample is taken. General Safe Work Practices: On-site personnel will be briefed each day in "tailgate" safety meetings as to the day's goals and equipment to be used. Anticipated contaminants and emergency procedures will be reviewed. Appropriate personal protective equipment will be worn and verified as correct by SSO, including respirator fit. Excavation and sampling equipment will be steam-cleaned before being transported on-site. Split-spoon sampling equipment will be cleaned before each use. Augers will be steam-cleaned beNveen borings. The on-site Geologist will oversee operations and log borings. The Sample Coordinator will assure that proper protocol is adhered to at all times regarding the collection and handling of samples. Project: AEC 94C-t464 3 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. Trainin~l Requirements: The SSO will conduct a pre-site training session which will include explanations of MSDS forms, ~.contaminant properties, warning signs, health hazard data, risk from exposure, and emergency First Aid. All pertinent chemicals are to be covered, and the SSO will assure that eveh/one fully understands site hazards. Medical Surveillance Pro~lram: According to CFR 29, 1910.120, Paragraph If], employees who wear respirators thirty [30] days or more during one [1] year or who have been exposed to hazardous substances or health hazards above established permissible exposure limits are required to be medically monitored. All site personnel will be required to submit to a complete chemical, physical examination within the past year. Record Keeoina: Documentation will be kept on file regarding personnel exposed to contaminant hazards on the job site according to OSHA regulations. Documentation that employees have received training on the SSP, respiratory protection, MSDS forms, and all emergency procedures will be Included. These will be reviewed during the preliminary "tailgate" training meeting. Exposure records filed for each job will be kept for thirty years fo meet requirements. Included in the files will be the names and Social Security numbers of employees, medical evaluations, on- the-job logs from entry to exit, First Aid administered, visits on-site by outside persons and personal air monitoring records. Contingency Plans: In the event of an accident, Injury, or other emergency, the Project Director, Senior Project Manager, or other person, will notify the appropriate government agencies or individuals as follows: Kern County Environmental Health Department 2700 M Street Bakersfield, California 93301 [805] 86t-3636 Police, Fire, or Ambulance Emergency 9-I-I Nearest Emergency Hospital: Bakersfield Memorial Hospital 420 34a' Street Bakersfield, California 93301 (805) 327-I 792 Project: AEC 94C-t464 4 Vapor Extraction Work Plan Advanced Environmental Concepts, Inc. I have read the preceding Health and Safe~y Plan and understand the contents herein.' NAME: COMPANY Project: AEC 94C-t464 5 Advanced Environmental..Concepls. inc. . :- .,_ ., :,.- "..'?--' . ~'"'.~.'"',".~,~-'~. .,...,. L' - ' '' '. ;' "' ' ,.,-'"'.'." ,;. ~- . -. . ,' .... ;"D,,'~ -'-~?/,;.:;~.~;,-~,".;"..:'.' ; ,;. ;';~'.,':%'."~",.' '".. ,~ · ' . . ' '. · ~: · ':-.' ' ';:-,:; .,' : [ · .' . ' , . .;";'..' "-'? ,' ·"%'Z'~: ".--.Y,:'..- ,: ':- .- ~ - ,,-"T'~ ,; ./ ".~ · ' , .' ; . .,. . . .- ',-"-. · '.; ,',,; . ' ;, · :" ~'-~ ,.,, ?.. '.C;-., ~'::~.;-.;';."~, , ;v';". h~,-.''-' ;'L.~ · · ''. . .'. - · - ~,;' ,,' - ' ~ . ; ~,.." *:2 .- ...... j;:,,,,,";~ ,...~ '~ ,,,, ~-~--'*. '~';!,';~ . ;, -, . - ...... , .... Appendix B ....... - ...... .., ~-, ? .-, -,-~.~- ..... -: .... . · ' ' . - ' . .. , .. · ' . . . . . .. . -. ,. ,. '.~;~. ' . . ., <,.4, ,.~-~,,-. %..;~ .%;~.'~ !;,--.-..,.;:?; .~ ',~ , - [' · ., .... , . .. .. '..; .:: .,; -. , .' , . . . ,..?:.:;:,; .,. r.,.,..,r: ~. ,:? ,: ..:../,' ,: ; L; ~i.:r-~ .:..~ :..; ;~;,.,:' ,~ :'...,., ... .: .... ;~,..:.-...- ..-: . ,. ,: -..... · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND INDU$'~ ,LiGIENE, TO×IBOLOGYo AND ~AFETY DATA SHEFT NOTE: NO REPRESENTATION IS MADE AS TO THE ACCURACY OF THE INFORMATION HEREIN. SEE PAGE 7 FOR CONDITIONS. UNDER WHICH DATA ARE FURNISHED. Trade Name and Synonyms 00351 UNLEADED REGULAR GASOLINE Manufacturer's Name Texaco Inc. I Address P.O. Box 509 Beacon, NY 12508 Chemical Name and/or Family or Description Automotive Lead-Free Gasotlne Emergency Telephone No. (914) 831-3400 ext. 204 THIS PRODUCT IS CLASSIFIED AS: NOT HAZARDOUS: }[.. HAZARDOUS BY DEFINITK~)N ND. IS).. 1,2,5,10, 12 ON ATTACHED EXPLANATION SHEETS WARNING STATEMENT: D/dqGER { EXTREHEL¥ FLAHI~BLE HARHFUL OR FATAL IF ~ALLO~KD ~Y BE H~HFUL IF INHALED; ~Y CAUSE IRRITATION ~Y BE H~MFUL. IF ABSORBED THROUGH SKIN }-~:?::.: :.:-~:.-: [.~: :: .:.:~::.:.~: :::::::::::::::::::::::::::::: :::::::::::::::::::::: ~:::::'.~::;: <~:~:~:37:?:?:[:?:?.::?:~:::?.~:~?:~:?~ ::::::::::::::::::::::::::::::::::::::::::::::::::::::: ~8?:?:?Q:~:~:~:~:[~<:2~;:: ~:2:~:2:3~:~?:~:?:~:::?~:~:?:?:~::~:'...?::~:::e~?g~$~z~?~:~:?:~:~:2:~ g?$:?:?:?:?:~:?:~:~:~g}:2:~::::~:?:~*:~::~:::::::~;l:::::::~:[:~:~:[~ ~:[:~:~.':~:~:~ :~:~:;:~:~:: ?~:~:: ~ Protect{ye Equipment (Tyoe) Eyes: Chemical type Sosstes or ~ace shield opt[onal. Ski~ Protective clothln& such as uniEorms, coveralls or lab coats should be worn. Launder or dry clean when soiled. Gloves resis- tant to chemicals and petroleum distillates required. Inhalation: Ventilation: SCBA or supplied air respiratory protection required for entry into tanks,vessels, or other confined spaces containing gasoline. Adequate to meet permissible concentrations. Permisslble Concentrations: Air: The ACGIH (1985-86) Ti4A for gasoline is 300ppm; Texaco recommends a TI4A of lOOppm. ~" First Aid Eyes: Flush with water for fifteen minutes. Skin: Wash exposed areas with soap and water. Ingestion: Do NOT induce vomiting. Hay cause chemical pneumonitis. Call a physician. Inhalation: Other Instructions: Should symptoms noted under physiological ef£ects occur, remove to fresh air. If not breathing, apply artificial respiration. Remove gasotlne-soaked ctothlng. ~J.D. - Not Determined N.A. - Not Apphcable ~ ~... -r~ ", - C,r~t~r Than Effects of Exposure Acute: Eyes: Causes slight-moderate eye irritation. Sk inL Hoderately [rrltatlng; causes redness, edema, or drying oE the skin. Respiratory System Hay cause dizziness, irritation of eyes, nose and throat, vomit- ins, bluish color of the skin, and CNS ef£ects. See A.C., Chronic: Recent studies with laboratory animals have shown that gasoline vapors caused kidney dama&e and kidney cancer in rats and liver cancer in mice. Other: - Sensitization Properties: Skin: Yes No ~ Unknown ResDiratory: Yes No X Unknown Median Lethal Dose (LDs0 LC so )(Species) Oral LD50 '= 18.75 ml/kR (rat.) Inhalation N · D. Dermal >5 ml/kR (rabbit) Other N.D. Irritation Index, Estimation of Irritation (Species) Skin 0.98/8.0 (rabb~ t) Eves 0/110 (rabbit) Ignition TemD.°F. 8.,~0 F Flash Point OF. (Method) -4OF (COC) Flammable Limits (%) Lower l. ZiT- Upper 7.67. Products Evolved When Subjected to Heat or CombustEon: Carbon monoxide and carbon dioxide may be formed on burning, in limited air supply. Recommended Fire Extinguishing Agents And Special Procedures: ^ccordin& to the National Fire Protection Association Guide 325~, use dry chemicat, foam or carbon dioxide. ~ater may be ineffec- tive on the frames, bu: rater shoutd be used to keep ~ire-exposed containers coot. [fa leak or spirt has no~ ignited, use ~ater spray to disperse the vapors and ko provide pro~ection for the persons attempting to stop the teak. Unusual or Explosive Hazards: Flo~ing gasoline can be [§n~ted by self-generated static etectri- city; use adequate ~roundin~. N.D. - Not DetermEned N.A. - Not Apphcable < - Less Than > - Greater Than 2 Waste Disposal Metho~ Re-evaluation o~ the product may be requlred by.the user at the t~me o~ disposal, s{nce the product uses, trans~ormat;ons, mlxtures and processes may change classi~catlon to non-hazardous or hazardous Eot reasons other than, or {n adder{on to ~gn~tab~l~ty. (See Remarks Eot Has~e Class~E~cat~on.) . Procedures in Case of BroCage or Leakage:(Transportation Spills Call CHEMTREC (800) a24-9300) £1~m~nate all ~gn~t{on sources ~nclud£ng £nternal combustion eng- ines and po~er tools. Vent!late area. Avoid breathing vapor. Use SCBA or suppl[ed-a{r mask Eot large sp{lls [n con~[ned areas. Contain sp~ll ~E poss;ble. Remove ~;th ~nert absorbent. Remarks: Haste Ctassi~[cation: Product (as presently constituted) has the RCRA characteristic o~ [gn~tab[l~ty and [~ d~scarded tn its purchased Eorm ~ould have the hazardous ~aste number D001. 0ANGEI~. EXTREMELY FLAMMABLE HARMFUL OR FATAL IF SWALLOWED MAY BE HARMFUL IF INHALE0: MAY CAUSE IRRITATION MAY BE HARMFUL IF ABSORBED THROUGH SKIN Long term exposure to vapors has caused cancer in laboratory animals. Keeo away from heat. sparks and flame. Avmd breathing vapor. Use only in well-ventilated locations. Avoid contacl w~th eves and prolonged comact with skin. Keel~ comainer rinsed. Wash thoroughly alter handlin~ FOR USE AS MOTOR FUEL ONLY ReQuirements for Transporlat~on. Handling and Storage: Transport, handle and store ~n accordance ~ith OSHA Regulation 1910.106, and applLcabte D.O,T. regutatLons. DOT Proper Shipping Name: Gaso l. [ne DOT Hazard Class (if applicable): Flammabte l[quLd, UN 1203 Boiling Point (OF) >c)O Specific Gravity O. 7-. 78 Appearance and Odor L[Rhl: sLra~ to pH of undiluted product Percent Volatile by Volume lO0 Viscosity <l.& cst @IOOF Hazardous Polymerizations Vapor Pressure >-350 (mmHg) (H20= 1) Vapor Density 3-~. 0 (Ali*= 1) !~.Rhl: red !~qu~,d Solubility s l Evaporation Other Occur X Do not occur )= I The Material Reacts Violently With: (If others is checked below, see additional comments on page 6 for futher details Air Water Heat Strong Oxidizers Others None of These X N.D. - Not Oeterm,ned N.A. - Not Apphcabte Chemical/Common Name CAS No. Exposure Limit. Range in l · Gasoline consists mainly of straight chain HIXTURE 300 ppm TWA ACGIH 1O0.00 and branched para[[inlc hydrocarbons, ole- flns, cyclopara[~ins and aromatics. The ben- 100 ppm TNA Texaco zene content normally varies [rom 0.2-3.52 wit.h a t.ypical value o[ 1.4~-. .Hazardous according to OSHA (1910.1200) or one or more state Right-To-Know llst.s. I. Title III Section 302/304 Extremely Hazardous Substance Component CAS No. % RQ (Lbs) TPQ {Lbs) NONE II. CERCLA Section 102(a) Hazardous Substance Component NONE CAS No. % RQ Ebs} IlL Title III Section 311 Hazard Categorization Acute Chronic X X IV. Title III Section 313 Toxic Chemicals Component Benzene Toluene Ethylbenzene Xyiene Pseudocumene Methyl reft-butyl ether Fire Pressure Reactive Not Applicable X CAS No. % 71432 1-3.99 108883 4-10.99 100414 1-3.99 1330207 4-10.99 95636 1-3.99 1634044 O-lO(vol%) 00351 UNLEADED REGULAR GASOLINE DANGER{ EXTREHELY FLAI~LE HARHFUL OR FATAL IF SNALLONED HAY BE HARHFUL IF INHALED; HAY CAUSE IRRITATION HAY BE HARHFUL IF ABSORBED THROUGH SKIN Long term exposure to vapors has caused cancer in laboratory animals. Keep avay Erom heat, sparks and Elame. Avoid breathing vapor. Use only in veil-ventilated locations. Avoid contact v/th eyes and prolonged contact vith skin. Keep container closed. Nash thoroughly after handling. FOR USE AS HOTOR FUEL ONLY IE svalloved, do not induce vomiting. Call a physician immediately. In case of contact, immediately flush eyes vlth plenty of rater for at least 15 minutes. Nash skin v/th soap and plenty of rater. Gasoline-soaked clothing should be removed and laundered before reuse. In case cE E/re use rater spray, foam, dry chemical or C02. Chemical/Common Name ,Gasoline consists mainly of straight chain and branched parafEinlc hydrocarbons, cle- f/ns, cycloparaEflns and aromatics. The ben- zene content normally varies Erom 0.2-3.52 with a typical value o£ 1.6Z. CAS No. Range in Z HIXTURE 100.00 · Hazardous according to OSHA (1910.1200) or one or more state Right-To-Knov lists. HHIS Health : 2 Reactivity : 0 Flammabi"llty: 6 Special : - DOT Proper Shipping Name: Gasoline DOT Hazardous Class : Flammable liquid, UN 1203 CAUTION: Misuse of empty containers can be hazardous. Empty containers can be hazardous if used to store toxic, flammable, or reactive materials. *Cutting or welding of empty containers might cause fire, explosion or toxic fumes from residues. Do not pressurize or expose to open flame or heat. Keep container closed and drum bungs ;n place. HEALTH EMERGENCY TELEPHONE: {914) 831-3400 (EXT. 2041 Texaco Inc. 2000 Westchester Avenue White Plains, New York 10650 For Additional Information concerning: Fuels/Lubricants/Antifreezes call Ig14) 831-3400 (EXT.204) Chemicals call (512) 459-6543 Transportation Spills call CHEMTREC (800) 424-9300 TEXACO INTEF[}S TO COIVI~LY FULLY WITH PROVISIONS OF THE TOXIC SUBSTANCES CONTROL ACT STATE OF MICHIGAN CRITICAL MATERIALS ACT (REVISED 1987) 1.4% benzene; conversion factor 6.7 pounds per gallon Other effects of inhalation include central nervous s~stem effects such as contracted pupils, loss of reflexes, convulsions, seizures, sudden loss of consciousness, coma and sudden death. Other indications of overexposure are headaches, flushing of the face, nausea, mental confusion and depression, loss of appetite, blurred speech and difficulty in swallowing. This product is intended for motor fuel only. To determine apDlicability or effect of any law' or regulation with respect to the product, users should consult his legal advisor or the aDDroDrlate government a§encv. Texaco does not undertake to furnish advice on such matters. Bv R. T. Richards Title Hgt. Env. Conservation & Toxicology Date 04-09-87 E] New ~ Rev,seal. Supersedes 04-t8-86 N.D. - Not [)eterm~ned N.A. - Not Applicable < Less Than > - Greater Than 6 THE INFORMATION CONTAINED H IS BELIEVED TO BE ACCURATE. IT IS ~VIDED INDEPENDENTLY OF ANY SALE OF THE PRODUCT AS PART OF TEXACO'S PRODUCT SAFETY PROGRAM. IT IS NOT INTENDED TO CONSTITUTE PERFORMANCE INFORMATION CONCERNING THE PRODUCT. NO EXPRESS WARRANTY, OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS MADE WITH RESPECT TO THE PRODUCT OR THE INFORMATION CONTAINED HEREIN. DATA SHEETS ARE AVAILABLE FOR ALL TEXACO PRODUCTS. YOU ARE URGED TO OBTAIN DATA SHEETS FOR ALL TEXACO PRODUCTS YOU BUY, PROCESS, USE OR DISTRIBUTE AND YOU ARE ENCOURAGED AND REQUESTED TO ADVISE THOSE WHO MAY COME IN CONTACT WITH SUCH PRODUCTS OF THE INFORMATION CONTAINED HEREIN. EXPLANATION OF THE INDUSTRIAL HYGIENE, TOXICOLOGY, AND MATERIAL SAFETY DATA SHEET PRODUCT INFORMATION Trade Name and Synonyms Refer to the code number and name under which the product is marketed and the common commercial name of the product. Manufacturer's Name and Address Self explana- tory. Chemical Name and/or Family or Description Refer to chemical, generic, or descriptive name of single elements and compounds. For purposes of this form. a product is defined as hazardous if it possesses one or more of the following characteristics: (1) has a flash-point below 200 degrees Fahrenheit, closed cup or sub- ject to spontaneous heating; (2) has a threshold limit value as established by the American Conference of Governmental Industrial Hygenists and/or the Occupational Safety and Health Administration (with exception to petroleum oil mist). (3) a single dose oral LDS0 below 500 mglkg: (4) causes burns to the skin in the short-term exposure or is systemically toxic by skin contact; (5) has been demonstrated to be a skin or eye irritant or causes respiratory irritation; (6) may cause skin or respiratory sensitization; (7) has teratogenic. mutagenic or other toxic effects; (8) may cause asphyxia or pneumoconiosis; (9) in the course of normal operations may produce dusts, gases. fumes, vapor, mist, or smoke which have one or more of the above characteristics; (10) con-' ta,ns a component which may be carcinogenic according to NTP (National Toxicology Program). IARC (International Agency for Research on Cancer). OSHA (Occupational Safety and Health Administration). EPA (Environmental Protection Agency) and/or NCI (Nat,onal Cancer Inst,tute.); (11) has a median LCS0 (RATS) in air of 200 gpm or less by volume of gas or vapor or 2.0 mg/I or less of mist. fume or dust when administered by continuous inhalation for one hour; (1:2) is a hazard as identified in the Product Shipping Label on page 5. OCCUPATIONAL CONTROL PROCEDURES IConsult your Industrial Hygienist or Oc~:upational Health SDecialisL) Protective EQuipment Type of protective equiment that is necessary for the safe handling and use of this product. Ventilation Normal means adequate to maintain oermlssible concentrations. Ventilation: type. i.e. local exhaust, mechanical. etc. Permissible Concentrations Indicates worker exposure limits, such as the Threshold Limit Value (TLr) as established by the American Conference of Governmental Industrial Hygienists or standards, promulgated by the Occupational Safety and Health Administration (e.g.. PEL). TLV-Time Weighted Average (TVVA) is the concentration in air averaged over an 8 hour daily exposure. TLV-CeilIng (C) is the ceiling limit on concentration that should not be exceeded during any part of the working day. "Skin" Notation (ACGIH) indicates that dermal absorption can contribute to overall exposure fol- lowing direct contact or exposure to a,rborne material. Permissible Exposure Level' (PEL) is the time weighted concentration in air averaged over an 8 hour daily exposure. EMERGENCY AND FIRST AID PROCEDURES Administer first aid and emergency procedures in case of eye and/or skin contact, ingestion and inhalation. PHYSIOLOGICAL EFFECTS Acute Exposures (Eye. Skin. Respiratory System) Refers to the most common effects that would be expected to occur from direct contact with the producL Chronic Refers to the effects that are most likely to oc- cur from rel~eated or prolonged exposure. Sensitizer Means a substance which will cause on or in normal living tissue, through an atlerg~c or photodynamic process, a hypersensitivity wh,ch becomes evident on reapplicat~on of. or expos- ure to. the same substance. Median Lethal Dose or Concentration {LDS0.LCSO) Refers to that dose or concentration of the ma- terial which will produce death in 50 per cent of the animals. For inhalation, exposure hme is in- dicated. Irritation Index Refers to an empirical score (Dralze Method) for eye and skin irritation when tested by the meth- od described. If numbers are not available, an es[~mated score and;cares whether or not mater;al is an irritant. FIRE PROTECTION INFORMATION Ignition Temperature Refers to the temperature in degrees Fahrenheit. at which a liquid will give off enough flammable vapor to ignite and burn continuously for 5 sec- onds. Flash Point (Method used) Refers to the temperature in degrees Fahrenheit. at which a licluid will give off enough flammable vapor to ignite. Flammable Limits Refers to the range of gas or vapor concentration (percent by volume in air) which will burn or ex- plode if an ignition source is present. Lower means the lower flammable limit and upper means the upper flammable limit given in per- cent. Products Evolved When Subjected to Heat or Combustion. The products evolved when this material is sub- jected to heat or combustion. Includes temper- ature at which oxidation or other forms of degra- dation occurs. Recommended Fire Extinguishing Agents and Special Procedures Specifies the fire fighting agents that should be used to extinguish fires. If unusual fire hazards are ~nvolved or special procedures indicated, this is specified. Unsusual Fire or Explosive Hazards Specifies hazards to personnel in case of fire, ex- plosive danger. ENVIRONMENTAL PROTECTION Vapor Pressure Pressure exerted when a solid or liquid is in equilibrium with its own vapor. Specific Gravity The ratio of the density 'of · the product to the density of water:' Vapor Density The ratio of the density of the vapor at satura- tion concentration ( 20 degrees Celsius or 68 degrees Fahrenheit ) to the density of air at 760 mmHg. Appearance and Odor Refers to the general characterization of the mat- erial, e.g. powder, colorless liquid, aromatic odor. etc. DH Refers to the degree of acidity or basicity of. the material in a specific concentration. pill-5 - STRONGLY ACIDIC pHS-7 - WEAKLY ACIDIC pH7-9 - WEAKLY BASIC prig- !4 - STRONGLY BASIC Solubility Refers to the solubility of a material by weight in water at room temperature. The term negli- gible, less than 0.1%; slight. 0.1 to 1%: moder- ate. 1 to 10%: appreciable, 10% or greater. Gives solubility in organic solvents where a0DroDrlate. Percent Volatile By Volume Refers to the amount volatilized at 20 degrees Celsius or 68 degrees Fahrenheit when allowed to evaporate. Specifies how this product may be disposed. Indicates precautions necessary in the event that leakage or breakage occurs. Included are (a) clean-up procedures, (b) personal protective equipment if necessary. (c) hazards that may be created, i.e. fire, explosion, etc. PRECAUTIONS Label that is required or recommended. Requirements for Transportation, Handling and Storage Specifies handling and storage procedures. Gives ICC. DOT. or other regulations related to safety and health for transportation. CHEMICAL AND PHYSICAL PROPERTIES Boiling Point (or Range) In degrees Fahrenheit or celsius 760 mmHg. Boiling Point at Evaporation Gives the rate of evaporation compared to a standard Viscosity Measure of flow characteristics in Kinematic vis- cosity in Centistokes. Hazardous Polymerization Hazardous polymerization is that reaction which takes place at a rate which produces large amounts of energy, Indicates whether it may or may not occur and under what storage conditions. Does the Material React Violently Indicates whether the material will react violently. releasing large amounts of energy when exposed under conditions listed. Composition Components of the product as recluired by OSHA (19 10.1200) and one or more state Right to Know laws. Texaco Inc. 2000 Westchester Avenue White Plains, New York 10650 TEXACO INC. -- INDUS'i. 'GIENE, TOXICOLOGY, AND IVy. ,L ;AFETY DATA SHEET NOTE: NO REPRESENTATION IS MADE AS TO THE ACCURACY OF THE INFORMATION HEREIN. SEE PAGE 7 FOR CONDITIONS UNDER WHICH DATA ARE FURNISHED, Trade Name and Synonyms 00352 LEADED REGULAR GASOLZNE Manufacturer's Name Emergency Telephone No. Texaco Inc. (91/+) 831-3/+00 ext. 20/+ Address P.O. Box 509 Beacon~ NY 12508 Chemical Name ~dlor Family or Descriotion Automotive Leaded Gasoline THIS PRODUCT IS CLASSIFIED AS: NOT HAZARDOUS: X HAZARDOUS BY DEFINITION NO.(S~ l, 2,5, l0 · ON ATTACHED EXPLANATION SHEETS WARNING STATEMENT: DANGER ! EXTREt4ELY FLAttNABLE HAENFUL OR' FATAL IF St4ALLOt4ED NAY BE HARNFUL IF INHALED; NAY CAUSE [ERITATION NAY BE HARNFUL IF ABSORBED THROUGH SKIN Protective ECluipment (Type) Eyes: Chemical type goggles or ~ace shield optional. Skin: 'Protective clothing such as uniEorms, coveralls or lab coats res[s should be worn. Launder or dry clean when soiled. Gloves ' - rant to chemicals and petroleum distlttates required. Inhalation: Ventilation: SCBA or supplied air respiratory protection required Eor entry into tanks,vessels, or other confined spaces containing gasoline. Adequate to meet permissible concentrations. Permissible Concentrations: Air: T~A ~or gasoline is 300 ppm (ACGIH 1985-86). Texaco recommends a T~A o~ 100 ppm. ~' First Aid Eyes: Flush with water For iiiteen minutes. Skin: ~ash exposed areas with soap and water. Ingestion: Do NOT induce vomiting. ~ay cause chemical pneumonltls. Call a physician. Inhalation:. Other Instructions: Should symptoms noted under physiological eEfects occur, remove to £resh air. If not breathing, apply artilicial respiration. Remove gasoline-soaked clothing. N.D. - Not Determined N,A. - Not ADolicable Effects of Exposure Acute: Eyes: Skin: Causes sLight-moderate, eye irritation. Hoderately irritating; causes redness, edema, or drying of the skin. Respiratory System Hay cause dizziness, irritation o~ eyes, nose and throat, vomit- ing, bluish color of the skin, and CNS effects. See A.C., Chronic: Recent studies with laboratory animals have shown that gasoline vapors caused kidney damage and kidney cancer in rats and liver cancer in mice.' Other: - Sensitization Properties: Skin: Yes No ~ Unknown Respiratory: Yes No X Unknown Median Lethal Dose (LDso LC so )(Species) Oral Similar product~ LDS0 '= 18.75 mt/kR (rat),practically nontoxic inhalation N · D, Dermal Other Similar product, >5 mt/kR (rabblt},practlcatty nontoxic Irritation Index. Estimation of Irritation (Species) Skin Similar product~0.98/8.0 (rabbit) ,stiRhtly irrltatinR Eyes Similar product, 0/110 (rabbit},minimaily irritatinR Symptoms of Exposure See Additional Comments. Ignition Temp.°F. 850 F Flash Point OF. (Method) -/-+OF (COC) Flammable Limits {%) Lower ! ·/~7, Upper 7. ~7, Products Evolved When Subjected to Heat or Combustion:. Carbon monoxide and carbon dioxide may be ~ormed on burning in limited air supply. Recommended Fire Extinguishing Agents And Special Procedures: According to the National Fire Protection Association Guide 325H, use dry chemical, foam or carbon dioxide. Hater may be inefiec- tlve on the Elames, but ~ater should be used to keep fire-exposed containers cool. I~ a leak or spill has not ignited, use water spray to disperse the vapors and to provide protection [or the persons attempting to stop the leak. Unusual or Explosive Hazards: Flowing gasoline can be ignited by seli-generated static electri- city; use adequate grounding. N.D. - Not Determined N.A. - Not Applicable < - Less Than > - Greater Than 2 · - .:: · 5:" .' .- -' ::~ ~::P.;~:¥:.:~:~.~:.~:~;..~.:::~<.:::.~::~.i[?~:~:;::.:::::¥:f:::f::;:~::::.`.:::~::::::;:::~::;::~?~:::::::~..::.:::~f~::~:~:~::::¥::::: ================================================ :::::::::' Waste Disposal Method: Re-evaluation o!~ the product may be required by the user at the time oE disposal, since the product uses, transt~ormations, mixtures and processes may chan&e class~l~icat[on to non-hazardous or hazardous Eot reasons other than, or in addition to ignltabillty. (See Remarks ~or 14aste Classlf~icatlon.) Procedures in Case of Breakage or Leakage: (Transportation Spills Call CHEMTREC {B00) 424-g300} £1imJ. nate att [snltlon sources inctudin& internal combust{on en~- ines and po~er Loots. Ventilate area. Avoid breathln& vapor. Use SCBA or supptJ, ed-air mask Eot lar&e sp[lls in conEJ, ned areas. Contain spill i~ possible. Remove ~il:h inert absorbent. Rem~ks: Naste Classi~ication: Product (as presently constituted) has the RCRA characteristic of isnltability and iE discarded in its purchased [orm ~ould have the hazardous waste number D001. ::, .P....~EC~U~I~ ........ ~:: r.:: :.:: ......... :~: :?:~::: :5:: ::::::::::::::::::::::: ............. ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ............................. ~:::::~ .................. ! ......................................................... :: ........................ ~ ......................... ..: .............................................. DANGER! EXTREMELY FLAMMABLE HARMFUL OR FATAL IF SWALLOWED MAY BE HARMFUL IF INHALED; MAY CAUSE IRRITATION MAY BE HARMFUL IF ABSORBED THROUGH SKIN Long term exposure to vapors has caused cancer in laboratory animalS. Keep away from heat, sparks and flame. Avoid breathing vapor. Use only in well-ventilated locations. Avoid contact with eyes and prolonged contact with skin. Keep container closed. Wash thoroughly after handling. FOR USE AS MOTOR FUEL ONLY:CONTAINS LEAO-ANTIKNOCK COMPOUNDS ReGu~rements for Tr~sportat~on. H~dling and Storage: Transport, handle and store [n accordance ~ith OSHA Regulation ~9~0.106, and applicable D.0.?. regulations. DOT Proper Shipl~ing Name: DOT Hazard Class (if aOplicable): Gasoline Flammable liquid, UN 1203 Boiling Point (OF) GTBO Vapor Pressure GT-350 {mmHg) Specific Gravity 0.7-. 78 (H20= 1) Vapor Density 3-/~. 0 (Air= I) Appearance and Odor Light stra~ to light red liquid pH of undiluted product N.A. Solubility Percent Volatile by Volume 100 Evaporation Viscosity L.T.I. 6 cst @ 100F Other - Hazardous Polymerizations Occur X Do not occur slight N.D. ( )=1 The Material Reacts Violently With: (If others is checked below, see additional comments on page 6 for futher details] Air Water Heat Strong Oxidizers Others None of These X X N.O. - Not Determined N.A. - Not AOOhcable Chemlcal/Co~on Name CAS No. ~.xposure Limit Range in Z Gasoline consists mainly oE straight chain and branched paraE~{nlc hydrocarbons, ole- Eins, c¥cloparaf~ins and aromatics. The ben- zene content normally varies ~rom 0.2-5.0~ with a typical value o~ 1.4Z. The lead con- tent may vary in compliance with EPA and state regulations. 100 ppm TNA - Texaco 100.00 .Hazardous according to OSHA (1910.1200) or one or more state Right-To-Know lists. l, Title Itl Section 302/304 F. xtremely Hazardous Substance Component CAS No. % RQ {Lbs) TPQ (Lbs) Tetraethyt t cad 78002 <0.01 10 100 II.'CERCLA Section 102(a) Hazardous Substance Component Tetraethyllead ~AS No. % RQ {Lbs) 78002 <0.01 10 II1. Title III Section 311 Hazard Categorization Acute Chronic IV. Titl~ III Section 313 Toxic ~hemicals Component Benzene Toluene E~hylbenzene Xylene Pseudocumene Hethyl tert-butyt ether Fire Pressure Reactive Not Applicable X CAS No. % 71432 1-3.99 108883 4-10.99 10041~ 1-3.99 1330207 4-10.99 95636 1-3.99 1634044 O-lO(voll) 00352 LEADED REGULAR GASOLINE DANGERI EXTREMELY FLAI~IABLE HARHFUL OR FATAL IF S~ALLO~ED HAY BE HARHFUL IF INHALED; HAY CAUSE IRRITATION HAY BE HARHFUL'IF ABSORBED THROUGH SKIN Long term exposure to vapors has caused cancer in laboratory animals. Keep away ~rom heat, sparks and ~lame. Avoid breathing vapor.Use only in well-ventilated locations. Avoid contact with eyes and prolonged contact with skin. Keep container closed. ~ash thoroughly after handling. FOR USE AS HOTOR FUEL ONLY;CONTAINS LEAD-ANTIKNOCK COMPOUNDS IE swallowed, DO NOT induce vomiting. Call a physician immediately. In case o[ contact, immediately [lush eyes ~ith plenty oE water tot at least 15 minutes. ~ash skin with soap and plenty o~ water. Gasoline-soaked clothing should be removed and laundered be[ore reuse. In case of fire use water spray, foam, dry chemical or C02. hem/cai/Common Name CAS No. Range in ~ ,aasoline consists mainly o£ straight chain 100.00 and branched paraEEinlc hydrocarbons, ole- Eins, cycloparaEEins and aromatics. The ben- zene content normally varies irom 0.2-5.01 -~ith a typical value oE 1.6~. The lead con- tent may vary in compliance with EPA and state regulations. lazardous according to OSHA (1910.1200) or one or more state Right-To-Know lists. ~' HHIS Health : 2 Reactivity : 0 Flammability: 6 Special : - lOT Proper Shipping Name: Gasoline 30T Hazardous Class : Flammable liquid, UN 1203 ~,UTION: Misuse of empty containers can be hazardous. Empty containers can be hazardous if used to store toxic, flammable, or reactive materials. Cutting or welding of empty containers might cause fire, explosion or toxic fumes from residues. Do not pressurize or expose to open flame or heat. Keep container closed and drum bungs in place. HEALTH EMERGENCY TELEPHONE: (914! 831-3400 {EXT. 204} Texac° Inc.: 2000 WestcheSter Avenue White Plains, New York 10650 For'Additional InformatiOn Coneernin~ Fuels/Lubricants/Antifreezes call ~g14) 831-3400 (EXT.204) Chemicals call 1512) 459-6543' Transportation Spills call CHEMTREC (800) 424-9:300 :: ': ' :: ': ;:::: ' ' · :' ' ' '::.¥.:: ~::¥ :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ~ .'.-:~:!~ ~: ~ ~ ::a~:~: .::~!~e~.:~a ~ .,.,.~,~.~ ~: ~;~ ~ ,?~ ~?~a~. ~9 ~:: :':':':': i': :':':':':':':':'; · ~' t' :'"'" '"t" 't" "" "' f'"~'~'"'f' 't'tY'"""" '"" '"~'"t" Y"f f "f '"' '"' ""'" 'f" '"" Y ",v .-.y .~ .-~ 't" Y '"" '"'"""" "Y '"'" '""" ""' '"'" ""'"' f '"w'"'"'"'"""""'"'r Y'""Y'"'"'"'" f"t"'""t"Y"" f f t ~t'" '"'"P'""ft ' · ' '"' '" ' -'" '"'"'t'"'""~'" "'"'t t''''''''v''''''''''' '"'"'"Y' I ' "' ' '" "'"'t ¢'"'"'" 'Y '"'"'~"'""~:"'"' TEXACO INTEI~S TO COMPLY FULLY WITH PHOVISIONS OF THE TOXIC SUBSTANCES CON'I'ROL ACT STATE OF ItICflIGAN CRITICAL ItATERIALS ACT (REVISED 1987) .4Z benzene, O.1Z lead Other effects o[ inhalation include central nervous system -effects such as contracted pupils, loss of reflexes, convulsions, seizures, sudden loss of consciousness, coma and sudden death. Other indications of overexposure are headaches, flushing of the face, nausea, mental confusion and depression, loss of appetite, blurred speech and d[fflculty [n swallowing. This product is intended for motor fuel only. Hay contain oxygen- ates such as tertiary butyl alcohol and methyl tertiary butyl ether. To determine apDlicability or effect of any law or regulation with respect to the product, users should consult his legal advisor or the appropriate government agency. Texaco does not undertake to furnish advice on such matters. R. T. Richards 0/~-09-87 Date U New Title Hgt. Env. Conservation & Toxicology E~] Revised. Supersedes 05-27-86 N.D. - Not Determined N.A. - Not ADDlicable < - Less Than > - Greater Than 6 THE INFORMATION CONTAINED HEREIN IS BELIEVED TO BE ACCURATE. IT IS PROVIDED INDEPENDENTLY OF ANY SALE OF THE PRODUCT AS PART OF TEXACO'S PRODUCT SAFETY PROGRAM. I'r IS NOT INTENDED TO CONSTITUTE PERFORMANCE INFORMATION CONCERNING THE PRODUCT. NO EXPRESS WARRANTY, OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS MADE WITH RESPECT TO THE PRODUCT OR THE INFORMATION CONTAINED HEREIN. DATA SHEETS ARE AVAILABLE FOR ALL TEXACO PRODUCTS. YOU ARE URGED TO OBTAIN DATA SHEETS FOR ALL TEXACO PRODUCTS YOU BUY, PROCESS. USE OR DISTRIBUTE AND YOU ARE ENCOURAGED AND REQUESTED TO ADVISE THOSE WHO MAY COME IN CONTACT WITH SUCH PRODUCTS OF THE INFORMATION CONTAINED HEREIN. EXPLANATION OF THE INDUSTRIAL HYGIENE, TOXICOLOGY, AND MATERIAL SAFETY DATA SHEET PRODUCT INFORMATION Trade Name and Synonyms Refer to the code number and name under which the product is marketed and the common commercial name of the product. Manufacturer's Name and Address Self explana- tory. Chemical Name and/or Family or Description Refer to chemical, generic, or descriptive name of single elements and compounds. For purposes of this form. a product is defined as hazardous if it 13ossesses one or more of the following characteristics: (1) has a flash-point below 200 degrees Fahrenheit. closed cup or sub- ject to spontaneous heating; (2) has a threshold limit value as established by the American Conference of Governmental Industrial Hygenists and/or the Occupational Safety and Health Administration (with exception to petroleum oil mist). (3) a single dose oral LDS0 below 500 mglkg; (4) causes burns to the skin in the short-term exposure or is systemically toxic by skin contact; (5) has been demonstrated to be a skin or eve irritant or causes respiratory irritation; (6) may cause skin or respiratory sensitization; (7) has teratogenic. mutagenic or other toxic effects; (8) may cause asphyxia or pneumoconiosis; (9) in the course of normal operations may produce dusts, gases. fumes, vapor, mist. or smoke which have one or more of the above characteristics: (10) con- tains a component which may be carcinogenic according to NTP (National Toxicology Program). IARC (International Agency for Research on Cancer). OSHA (Occupational Safety and Health Administration). EPA (Environmental Protection Agency) and/or NCI (National (~ancer Institute.); (11) has a median LCS0 (RATS) in air of 200 ppm or less by volume of gas or vapor or 2.0 mg/I or less of mist. fume or dust when administered by continuous inhalation for one hour: (12) is a hazard as identified in the Product Shipping Label on page 5. OCCUPATIONAL CONTROL PROCEDURES (Consult your Industrial Hygienist or Occupational Health Specialist.) Protective Equipment Type of protective eauiment that is necessary for the safe handling and use of this product. Ventilation Normal means adecluate to maintain permissible concentrations. Ventilation:. type. i.e. local exhaust, mechanical. etc. Permissible Concentrations Indicates worker exposure limits, such as the Threshold. Limit Value (TLr) as established by the American Conference of Governmental Industrial Hygienists or standards, promulgated by the Occupational Safety and Health Administration (e.g.. PEL). TLV-Time Weighted Average (TWA) is the concentration in air averaged over an 8 hour daily exposure. TLV-Ceiling (C) is the ceiling limit on concentration that should not be exceeded during any part of the working day. "Skin" 'Notation (ACGIH) indicates that dermal absorption can contribute to overall exposure fol- lowing direct contact or exposure to airborne material. Permissible Exposure Level (PEL) Is the time weighted concentration in air averaged over an 8 hour daily exposure. EMERGENCY AND FIRST AID PROCEDURES Admimster first aid and emergency procedures in case of eye and/or skin contact, ingestion and inhalation. PHYSIOLOGICAL EFFECTS Acute Exposures (Eye. Skin. Respiratory System) Refers to the most common effects that would be expected to_,. occur from direct contact v~ith the product. Chronic Refers to the effects that are most likely to oc- cur from repeated or prolonged exposure. Sensitizer Means a substance which will cause on or in normal living tissue, through an allergic or photodynamic process, a hypersensitivity which becomes evident on reapplication of. or expos- ure to, the same substance. Median Lethal Dose or Concentration (LDS0.LCS0) Refers to that dose or concentration of the ma- terial which will produce death in ,50 per cent of the animals. For inhalation, exposure time is in- dicated. Irritation Index Refers to an empirical score (Draize Method) for eye and sk.n ~rritatlon when tested by the meth- od described. If numbers are not available, an estimated score indicates whether or not the mater~al is an irritanL FIRE PROTECTION INFORMATION Ignition Temperature Refers to the temperature in degrees FahrenheiL at which a liquid will give off enough flammable vapor to ignite and burn continuously for 5 sec- onds. Flash Point (Method used) Refers to the temperature in degrees Fahrenheit, at which a liquid will give off enough flammable vapor to ignite. Flammable Limits Refers to the range of gas or vapor concentration (percent by volume in air) which will burn or ex- plode if an ignition source is present. Lower. means the lower flammable limit and upper means the upper flammable limit given in per- cent, Products Evolved When Subjected to Heat or Combustion. The products evolved when this material is sub- jected to heat or combustion. Includes temper- ature at which oxidation or other forms of degra- dation occurs. Recommended Fire Extinguishing Agents and Special Procedures Specifies the fire fighting agents that should be used to extinguish fires. If unusual fire hazards are involved or special procedures indicated, this is specified. Unsusual Fire or Explosive Hazards Specifies hazards to personnel in case of fire. ex- plosive danger. ENVIRONMENTAL PROTECTION Specifies how this product may be disposed. Indicates precautions necessary in the event that leakage or breakage occurs. Included are (al clean-up procedures. (b) personal protective equipment if necessary. (c) hazards that may be created, i.e. fire. explosion, etc. PRECAUTIONS Label that is required or recommended. Requirements for Transportation. Handling and Storage Specifies handling and storage procedures. Gives ICC. DOT. or other regulations related to safety and health for transportation. CHEMICAL AND PHYSICAL PROPERTIES Boiling Point (or Range) In degrees Fahrenheit or Celsius Boiling Point at 760 mmHg. Vapor Pressure Pressure exerted when a solid or liquid is in equilibrium with its own vapor. Specific Gravity The ratio of the ~ density of .the product to the density of water. Vapor Density The ratio of the density of the vaoor at satura- tion concentration ( 20 degrees Celsius or 68 degrees Fahrenheit ) to the density of air at 760 mmHg. Appearance and Odor Refers to the general characterization of the mat- erial, e.g. powder, colorless liquid, aromatic odor. etc. pH Refers to the degree of acidity or basicity of the material in a specific concentration. pill-5 - STRONGLY ACIDIC pH5-7 - WEAKLY ACIDIC pH7-9 - WEAKLY BASIC prig- 14 - STRONGLY BASIC Solubility Refers to the solubility of a material by weight in water at room temperature. The term negli- gible, less than 0.1%; slight. 0.1 to 1%; moder- ate. 1 to 10%; appreciable, 10% or greater. Gives solubility in organic solvents where appropriate. Percent Volatile By Volume Refers to the amount volatilized at 20 degrees Celsius or 68 degrees Fahrenheit when allowed to evaporate. Evaporation Gives the rate Of evaporation compared to a standard V~scosity Measure of flow characteristics in Kinematic vis- cosity in Centistokes. Hazardous Polymerization Hazardous polymerization is *that reaction which takes place at a rate which produces large amounts of energy. Indicates whether it may or may nol occur and under what storage conditions. ODes the Material React Violently Indicates whether the material will react violently. releasing large amounts of energy when exposed under conditions listed. Composition Components of the product as required by OSHA (1910.!200) and one or more state Right to Know laws. Texaco Inc. 2000 Westchester Avenue White Plains, New York 10650 March 4, '1996 · ADVANCED ENVIRONMENTAL CONCEPTS INC- Mr. Dan Starkey Kern County Environmental Health Services Department 2700 "M" Street, Suite 300 Bakersfield, California 9330'1 Regarding: Site Closure Work Plan Chico and the Man Service Station 234 East '18th Street Bakersfield, California Dear Mr. Starkey: Advanced Environmental Concepts, Inc. [AEC) has prepared the Site Closure Work Plan for the above referenced project/location. Enclosed please find that report, which AEC is submiffing for review. Should you have any questians or require clarification on any aspects of the enclosed, please do not hesitate to contact our office at [805] 83~-~646. Respectfully yours, Advanced Environmental Concepts, Inc. ~dinator / Office Administrator Attachments: Report [~I] cc: Mr. Gene Bolton ENVIRONMENTAL CONCEPTS WITH E)ESIGN iN MIND /'ffil · ADVANCED ENVIRONMENTAL CONCEPTS INC= "Advanced Environmental Concepts, Inc. is pleased to present the following: SITE CLOSURE WORK PLAN at Chico and the Man Service $1alion 231 East 18th Street Counly of Kern · Bakersfield, California This work plan has been prepared for: Gene Bolton, Pro-Tech Specialties Prepared: February 1996 · ENVIRONk4ENTAL CONCEPTS WITH DESIGN Site Closure Work Plan Advanced Environmental Concepts, Inc. 1.0 Table of Contents INTRODUCTION '1 .'1 Purpose '1.2 Scope of Work '1.3 Schedule Parle 2.0 BACKGROUND 3.0 WORK PLAN 4.0 METHODS 4,t 4.2 4.3 4.4 4.5 Boring Methods Soil Sampling Field Screening of Soil Samples Soil Analysis Abandonment of Vapor Extractian Wells 5.0 SITE SAFETY PLAN 6.0 REMARKS / SIGNATURES Appendices: A) Project Figures / Maps B) Health and Safety Plan Project: AEC 96P-1640 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND Site Closure Work Plan Advanced Environmental Concepts, Inc. t.0 INTRODUCTION ~rvlr. Gene Bolton (owner) has authorized Advanced Environmental Concepts, Inc. (AEC) to prepare the following work plan for the conformation sampling and request for closure report for the Chico and the Man Service Station (Figure t]. The site address is 23t East 18th Street, Bakersfield, California. The lead agency for this project is the Kern County Enviranmental Health Services Department (KCEHSD), represented by Mr, Dan Starkey, Hazardous Materials Specialist. t .1 Purpose The conformation soil sampling program described in this work plan has the following objectives: Advance one soil boring through the approximate center of the gasoline plume and collect soil samples to be submitted to a state certified laboratory for analysis of total petroleum hydrocarbons as gasoline (TPH-g] and benzene, toluene, ethylbenzene, and xylenes [BTEX]; Use the analytical data to demonstrate that the vapor extraction activities were effective and has subsequently stabilized the contaminate plume. Upon demonstrating the plume is stable and no longer a threat to groundwater request that no further action be required and final site closure be granted. 1.2 Scope of Work The scope of services described in this work plan include: Locating underground utilities using available property owner information as well as the Underground Service Alert [USA]. Advancing one soil boring in the vicinity of the former underground storage tanks [UST's]. Soil samples will be collected at predetermined depths to be evaluated in the field. As planned, samples will be collected at approximate 5-foot intervals to total depth in each well. The samples will be collected using a standard California split-spoon sampler. Brass tubes will be steam-cleaned prior to use. The samples will be field-screened and selected samples will be chosen for chemical analysis. Field-screening will be accomplished using a photoionization detector (PID) with a t0.0 eV lamp. Soil samples for chemical analyses will be collected in brass tubes and sealed with end caps and tape. The sealed tubes will immediately be placed in a cooler chilled with Blue Ice to be transported to a State-certified laboratory under chain- of-custody protocol. Project: AEC 96P-t640 · ENVIRONMENTAl. CONCEPTS WITH DESIGN IN MINE) Site Closure Work Plan Advanced Environmental Concepts, Inc. Selected soil samples will be analyzed for total petroleum hydrocarbons as gasoline (I'PH-g) and volatile aromatic (BTEX), using EPA methods 8015G and 8020 respectively. Prepare a final report which describes the results of the soil investigation and mitigation. Data included will be drilling methods, sampling methods, chemical analytical results, and conclusions. 1.3 Schedule Advanced Environmental Concepts, Inc. anticipates beginning the work described in this work plan within two weeks of approval by KCEHSD and authorization to proceed from Mr. Gene Bolton. Drilling will commence only after applicable county permits have been obtained. The soil boring is expected to be completed in one day of mobilization to the site. A final report will be prepared summarizing all field remedial operations and laboratory results. The report will be provided within one month of mitigation. 2.0 BACKGROUND On April 21, 1989 Valley Tree Construction supervised the excavation, removal, and disposal of four [4) gasoline UST's from the subject site. Very strong gasoline odors were noted in the soil during the excavation procedures. Former tank locations and sample locations are presented on Figure 2 [Appendix Al. The analytical results of soil samples collected from below the removed UST are presented in Table t. Units are in milligrams per kilogram [mg/kg) which are equivalent to parts per million (ppm). Table t Analytical Results - Soil Samples Tank Removal 4121189 (ppm} Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene TH-I-2' 6900 3t0 920 1210 220 TH-t-6' 5600 210 690 1085 190 TH-2-2' 4300 150 550 670 140 TH-2-6' 7000 230 930 1520 280 TH-3-2' 5000 85 490 1230 2t0 TH-3-6' 2500 15 100 472 70 TH-4-2' ND ND ND ND ND TH-4-6' ND ND ND ND ND Project: AEC 96P4640 2 · ENVIRONMENTAl CONCEPTS WITH DESIGN IN MIND Site Closure Work Plan Advanced Environmental Concepts, Inc. Table 4 (continued] Analytical Results - Soil Samples Tank Removal 4121189 [pprn] Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene TH-5-2' ND ND ND ND ND TH-5-6' ND ND ND ND ND TH-6-2' ND ND ND ND ND TH-6-6' ND ND ND ND ND TH-7-2' ND ND ND ND ND TH-7-6' ND ND ND ND ND TH-8-2' ND ND ND ND ND TH-8-6' ND ND ND ND ND TH-9-2' ND ND ND ND ND TH-9-6' ND ND ND ND ND Delectlon Umit: 4.0 2.0 2.0 5.0 2.0 ND: TPH-g: Non-detected Total Petroleum Hydrocarbons as gasoline Based on these results, KCEHSD required that a site assessment evaluating the lateral and vertical extent of hydrocarbon impacted soil be performed. On December ~2, t993, four soil borings (B-~, B-2, B-3, and B-4) were drilled on the subject property. The borings were positioned to evaluate the vertical and horizontal extent of the hydrocarbon migration and advanced using a truck-mounted Mobile B-6t drill rig, equipped with 8-inch O.D. continuous flight, hollow-stem augers. Borings I, 2, and 4 were drilled to a total depth of 60 feet BGL and boring 3 was drilled to 30 feet BGL. Selected soil samples from these borings were submitted to Associated Laboratories, Inc., of Orange, California and analyzed for total petroleum hydrocarbons as gasoline [TPH-g] and volatile aromatics [BTXE] using CA DHS and EPA 8020 method, respectively. The analytical results are presented in Table 2. Units are in milligrams per kilogram [mg/kg], which are equivalent to parts per million [ppm]. TABLE 2 Analytical Results Soil Borings 12/15/93 [ppm] Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene Bt-20 ND ND ND ND ND Bt-30 ND ND ND ND ND Bt-40 t t 0.80 2.0 0.93 0.1 t Project: AEC 96P-t640 3 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · Site Closure Work Plan Advanced Environmental Concepts, Inc. TABLE 2 [continued] Analytical Results Soil Borings '121'15/93 (pprn] Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene BI-50 13 ND ND ND ND Bt-55 19 0.08 0.15 0.06 ND BI-60 ND ND ND ND ND B2-15 4300 ND 2.2 380 4.3 B2-25 2600 0,20 35 300 40 B2-30 9800 45 9t0 1400 250 B2-35 2700 2.7 130 350 55 B2-40 14000 t90 t500 2000 370 B2-45 39 0.23 2.0 3.4 0.56 B2-50 4.6 ND 0.85 0.20 ND B2-55 10 0.08 0.02 0.t0 0.01 B2-60 15 ND ND ND ND B3-20 42 ND ND ND ND B3-30 2700 't 2 200 340 56 B4-30 70 0. '1 ~1 t .5 1.3 4.4 B4-50 16 ND 0.04 0.039 ND B4-60 t 7 0.02 0. I 0. t 6 0.02 D. L,(mg/kg) 4.0 0.005 0.005 0.005 0.005 ND: D.L. Non-detected at indicated limit of detection Detection Limit Upon review of the assessment results KCEHD required that remediation activities be undertaken to obtain acceptable hydrocarbon concentrations, On December 4, 1995 a vapor extraction system was installed and it's operation initiated. Initial vapor concentrations were measured at 91% of the lower explosive limit [LEL] and after eighteen days of operation had dropped off to 21% of the LEL. After allowing the formation to rest for 17 days the LEL returned to 49% then dropped off to 11% of the LEL after 30 days. The formation was allowed to rest again for 14 days and a vacuum was reinduced which resulted in the LEL level returning to 52% and dropping off to less than 10% in 3 days and to 7% in 7 days. This pattern of LEL readings indicate that a reduction in hydrocarbons has taken place; therefore, AEC is proposing confirmation sampling. 3.0 WORK PLAN Advanced Environmental Concepts, Inc. proposes to advance one soil boring in the center of the plume and collect six soil samples at 15, 25, 30, 35, 40, and 50 feet BGL for the purpose of achieving the goals stated in this document. The boring location is presented in Figure 3. Project: AEC 96P-t640 4 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND Site Closure Work Plan Advanced Environmental Concepts, Inc. 4.0 METHODS The methods to be employed during implementation of the above scope of work are described in the following sections. 4. t Boring Methods The boring will be advanced using a Mobile Drill B-61 rig, or equivalent, with a 8-inch diameter, hollow-stem, continuous-flight auger in accordance with ASTM Method D 1452- 80 for soil investigations and sampling by auger borings. At no time shall any water or other liquid be added to the boring. The augers will be steam-cleaned prior to drilling the borings. The lithology and other pertinent data will be recorded on a field boring log in accordance with ASTM Method D 2488-84 for visual description and identification of soils. Cuttings from the boring will be placed on sheets of plastic and covered until verified with analytical results, whether or not the soil is contaminated. 4.2 Soil Sampling Soil samples will be collected through the auger in 2-inch diameter by 6-inch long brass sleeves driven In a split-spoon sampler by a 140-pound hammer with a 30-inch drop in accordance with ASTM Methods D 1586-84 for split-barrel sampling of soil and D 1587-83 for thin-walled tube sampling of soils. The brass sleeves and sampler will be washed in a trisodium phosphate ('I'SP] or Alconox solution and rinsed in clean, deionized water prior to each use. Soil samples will be collected at selected depths in each boring in order to provide baseline data and confirm prior laboratory results. The total depth of the boring will extend to 5 feet below the last detected indication of contamination. The blow counts, recovery, and lithology will be recorded on the field logs. Lithology will be described in accordance with ASTM Method D 2488-84 [Standard Practice for Description and Identification of Soils). Selected soil samples will be sealed with Teflon tape, capped, sealed with duct tape, labeled in accordance with EPA protocols, recorded on a chain-of- custody document, placed in a cooler chilled with Blue Ice at 4-degrees centigrade, and transported to a State-certified laboratory with the chain-of-custody for the specified analyses. 4.3 Field Screening of Soil Samples Soil samples will be collected using three 6-inch brass tubes installed inside a split-spoon sampler. The middle sample tube will be immediately capped and stored in an iced cooler upon collection. The bottom tube will be used for lithologic description, and the top tube will be used for field screening. The soil collected In the top tube will be capped, and a headspace reading will be obtained using the PID. The standard headspace reading will be noted on the boring log. Project: AEC 96P-1640 5 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · Site Closure Work Plan Advanced Environmental Concepts, Inc. 4.4 Soil Analyses The soil samples will be analyzed by a California-certified laboratory using State guidelines and EPA protocols. The samples will be analyzed for total petroleum hydrocarbons as gasoline by EPA method 8015 [gasoline), and volatile aromatic organics {BTEX) by EPA method 8020. 4.5 Abandonment of Vapor Extraction Wells Once final closure is granted the vapor extraction wells will be abandoned by filling the casing with neat cement and the destroying the casing to approximately 5-feet BGL. 5.0 SEE SAFETY PI_AN A Site Safety Plan is included Regulations and CAC Title 20. as Appendix B which complies with Worker Right-to-Know Project: AEC 96P-1640 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · Site Closure Work Plan Advanced Environmental Concepts, Inc. 6.0 REMARKS / SIGNATURES This work plan represents the professional opinions of Advanced Environmental Concepts, Inc, -'These opinions are based on currently available data and were arrived at in accordance with accepted hydrogeologic and environmental engineering practices. No other warranty, expressed or implied, is given. This work plan has been prepared by: Advanced Environmental Concepts, Inc. Registered Geolod~t #5504 Certified Hydrogeologist #156 This work plan has been reviewed by: J~h~ot~n'L. Buck ~ ~' I~r~ject Hydrogeologist I~gistered Environmental Assessor #4508 DOC 16FV Project: AEC 96P-1640 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND Advanced Environmental Cono~ls; Inc. · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 · BAKERSFIELD, CA 93313 805/831-1646 · FAX 8051831-1771 KERN G~4f St OTin WY. I ! AEC ADVANCED ENVIRONMENTAL CONCEPTS P.O. BOX40672 BAKERSFIELD, CA93384 -SITE LOCATION MAP- Chico and the Man Service Station 231 East 18th Street County of Kern · Bakersfield, CA FIGURE 1 EAST 18th STREET ............. FORMER PIPING FORMER TANK PIT ~ i i il ..- m ' SAMPM~ I. D. TH-~ I ~ SAMPLE LOCATION II~ I~1 5600 TPH-g IN PPM ~ SCALE I I I · .~c. Chico and the Man Service Station / 231 East 18th Street 2 ADVANCED ENVIRONMENTAL CONCEPTS P.O. BOX40872 BAKERSRELD, CA 9~384 County of Kern · Bakersfield. California III E. 181h STREET n Plume , / BUILDING i ~//'""'"'"'""~"""""~ ] VACANT LOT i · /\ ~ ~ t~¢~::::::, ~ FEN / seam II ~2 -Boring Location Map- FIGURE .~~,,~==. Chi~ ~d the Man ~wi~ S~flon ~V~ED ~NME~ ~P~ 231 E~t 18~ S~t P.o. ~x~= ~RSR~. Ca ~ ~un~ of Kern · ~ersfield. CNEomla Advanced Environmenlal Concepts. Inc. · ENVRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 · BAKERSFIELD, CA93313 805_/831-1646 ,. FAX 805/831-1771 Site Closure Work Plan Advanced Environmental Concepts, Inc. Health & Safety Plan.. for Chico and the Man Service Station 23 t East t8lh Street County of Kern · Bakersfield, California Inlroducfion: A Site Safety Plan (SSP] has been designed to address safely provisions needed during the site soil assessment / remediaflon. Its purpose is to provide established procedures to protect all on-site personnel from direct skin contact, inhalation, or ingestion of potentially hazardous materials that may be encountered at the site. The SSP establishes personnel responsibilities, personal protective equipment standards, decontamination procedures and emergency action plans. Advanced Environmental Concepts, Inc. seeks to enter the Chico and the Man Service Station property for the purpose of drilling, soil sampling, and well installation. Soil samples will be collected during drilling operations. Each sample to be chemically analyzed will be collected in a brass sleeve, capped with lined plastic lids, sealed with tape and placed on ice in a chilled cooler. Chain-of-custody protocol will be followed. Drilling equipment will be transported to the site and operated-by: Melton Drilling Company 710 t Downing Avenue Bakersfield, California 93308 Contractor's License e508270 This SSP describes means for protecting all on-site personnel from contamination or personal injury while conducting drilling and installation activities. As described below, we will strive to meet all requirements promulgated by the California Department of Health Services. Responsibilities of Key Personnel: All on-site personnel have been assigned key responsibilities. Mr. Jonathan Buck will serve as Project Manager and on-site Geologist. He will also serve as Site Safety Officer [SSO].. As SSO, Mr. Buck will assure that on-site personnel have received a copy of the SSP. Personnel will be required to document their full understanding of the SSP before admission to the site. Compliance with the SSP will be monitored at all times by the SSO. Appropriate personal protective equipment, as listed below, will be available and utilized by all on-site personnel. Prior to beginning work, the SSO will conduct a training session to assure that all personnel are aware of safe work practices. In the training session, personnel will be apprised of hazards at the site. The SSO will utilize Material Safety Data Sheets for information on compounds to be encountered. Project: AEC 96P-1640 I Site Closure Work Plan Advanced Environmental Concepts, Inc. Mr. Buck will also be responsible for keeping field notes, collecting and securing samples, and assuring sample integrity by adherence to chain-of-custody protocol. All on-site personnel will take reasonable precautions to avoid unforeseen hazards. After documenting their understanding of the SSP, each on-site employee will be responsible for strict adherence to all points contained herein. Any deviation observed will be reported to the ssa and corrected. On-site employees are held responsible to perform only those tasks for which they believe they are qualified. Provisions of this SSP are mandatory, and personnel associated with on-site activities will adhere strictly hereto. Job Hazard Analyses: Hazards likely to be encountered on-site include those commonly encountered when operating any mechanical equipment, such as the danger of falling objects or moving machinery. Simple precautions will reduce or eliminate risks associated with operating such equipment. An excavation contractor has been employed to deliver and operate all excavating equipment. Qualified personnel only will have any contact with this equipment. All on-site personnel, including the excavation contractor and his employees, are required ta wear hard hats when in close proximity to excavating equipment. Latex sampling gloves will be.worn by persons collecting or handling samples to prevent exposure to contaminants. Gloves will be changed between samples. Used gloves are discarded in order to avoid cross-contamination. Proper respiratory equipment will be worn if vapor contamination levels on-site exceed State-mandated action levels; a photoionization detector will be used for this purpose. The action level requiring respiratory apparatus will be 5 ppm in the breathing space. Furthermore, no smoking, open flames, or sparks will be permitted on-site. Risk Assessment Summary: Exposure to chemicals anticipated on-site include gasoline, benzene, toluene, and xylenes (BTX]. These chemicals represent hazards because they are moderately to extremely toxic, and most are highly flammable. Threshold Limit Values [TLV's), Shod Term Exposure Limits [STEL's) and Toxicity levels [LD50, oral-rat], all in rog/kg [ppm], are listed below: Compound TLV STEL Toxicity Gasoline 200 300 .... Diesel 50 75 .... Benzene 10 25 4894 Toluene t00 150 5000 Xylene t00 150 4300 Benzene is a known carcinogen. Project: AEC 96P-t640 2 Site Closure Work Plan Advanced Environmental Concepts, Inc. Exposure Monitorina Plan: A PID will be used to monitor vapor concentratians around the site. Should concentratians exceed -'TLV's, protective measures will be taken. Passive dosimeter badges will be placed in,downwind locations if PID readings indicate high levels of volatile organics in the breathing space. Personal Protective Equipment: On-site personnel will have access to respirators with organic vapor cartridges. Replacement cartridges will be available on-site as needed. When handling samples, the on-site Geologist will wear latex gloves. Hard hats will be worn by all on-site personnel when in proximity to drilling equipment. Work Zones and Security Measures: Access to the site will be restricted to authorized personnel. A set of cones, placards, or wide yellow tape surrounding the site will define the perimeter, if needed. The Project Manager will be responsible for site security. Decontamination Measures: Avoidance of contamination whenever possible is the best method for protection. Common sense dictates that on-site personnel avoid sitting, leaning or placing equipment on possible contaminated soil. All personnel will be advised to wash their hands, neck and face with soap and water before taking a break or leaving the site. Respirators will be washed with soap and water following each day's use. Excavation and sampling equipment used will be decontaminated by steam-cleaning. Sampling equipment will be decontaminated before each sample is taken. General Safe Work Practices: On-site personnel will be briefed each day in "tailgate" safety meetings as to the day's goals and equipment to be used. Anticipated contaminants and emergency procedures will be reviewed. Appropriate personal protective equipment will be worn and verified as correct by SSO, including respirator fit. Excavation and sampling equipment will be steam-cleaned before being transported on-site. Split-spoon sampling equipment will be cleaned before each use. Augers will be steam-cleaned between borings. The on-site Geologist will oversee operations and log borings. The Sample Coordinator will assure that proper protocol is adhered to at all times regarding the collection and handling of samples. Project: AEC 96P-t640 3 Site Closure Work Plan Advanced Environmental Concepts, Inc. Trainin.q Requiremenls: The SSO will conduct a pre-site training session which will include explanations of MSDS forms, contaminant properties, warning signs, health hazard data, risk from exposure, and emergency First Aid. All pertinent chemicals are to be covered, and the SSO will assure that everyone fully understands site hazards. Medical Surveillance Proaram: According to CFR 29, 19t0.120, Paragraph (fi, employees who wear respirators thirty (30] days ar more during one [I) year or who have been exposed to hazardous substances or health hazards above established permissible exposure limits are required to be medically monitored. All site personnel will be required to submit to a complete chemical, physical examination within the past year. Record KccDincI: Documentation will be kept on file regarding personnel exposed to contaminant hazards on the job site according to OSHA regulations. Documentation that employees have received training on the SSP, respiratory protection, MSDS forms, and all emergency procedures will be included. These will be reviewed during the preliminary "tailgate" training meeting. Exposure records filed for each job will be kept for thirty years to meet requirements. Included in the files will be the names and Social Security numbers of employees, medical evaluations, on- the-job logs from entry to exit, First Aid administered, visits on-site by outside persons and personal air monitoring records. Contingency Plans: In the event of an accident, injury, or other emergency, the Project Director, Senior Project Manager, or other person, will notify the appropriate government agencies or individuals as follows: Kern County Environmental Health Deportment 2700 M Street Bakersfield, California 93301 [805] 861-3636 Police, Fire, or Ambulance Emergency 9-1-1 Nearest Emergency Hospital: Bakersfield Memorial Hospital 420 34th Street Bakersfield, California 93301 (805) 327-I 792 Project: AEC 96P-t640 4 Site Closure Work Plan Advanced Environmental Concepts, Inc. I have read the preceding Health and Safety Plan and understand the contents herein: -NAME: COMPANY Project: AEC 96P-t640 5 February 26, 1996 To: State Water Resources Control Board UST Cleanup Fund P.O. 8ox 94244-2120 Sacramento, CA 94244-2120 From: Gene Bolton P.O. Box 11324 Midland, TX 79702 Subj: Commitment and Progress AccoUnt 000071 Attn: Mr. Steve Parada Please review the following outline of activities regarding the above account # 000071, property located at lBth and Sonora Streets in Bakersfield, CA over the last five years; 1) Tanks and flow lines were removed and disposed of (cost $6,000.00) 2) Saturated soil was removed, disposed of and replaced with new soil (cost $8,100.00) 3) Five shafts were drilled into contaminated area to take soil tests 4) Four shafts were drilled to install mist extractors after permission was obtained from Air Quality Control Department 5) A total of $14,988.00 of recoverable expenses had been invested by mid 19~5. $9,988.00 was reimbursed to our operation by the U.S.T. Cleanup Fund. The $5,000.00 deductible was subtracted at this juncture. 6) We have invested $10,121.57 more in our cleanup efforts. be sending this in for processing shortly I will 7) We now have the laboratory tests for January 1996 which read as follows: Benzene Tolulene Ethylbenzene Xylenes TPH (gasoline) 0.11 ppm 0.43 ppm 0.14 ppm 0.074 ppm 4.3 ppm 8) We have determined that a flume is negligible 9) The water table at this location is 260 feet underground 10) There are no water wells within three miles distance from the property. Let me say in conclusion that I wish to persevere in this endeavor until we have convincingly protected our water table. However, Hy contractor and other professionals feel that we may have worked the project to acceptable completion. I don't wish to spend money needlessly and [ am sure U.S.T. Fund has the same feelings. Ne will continue operations until notified otherwise. Thank You and Regards,. CC= D. Starkey M. Ottobferry, Atty. File ase Closure Summ Leaking Underground Fuel Storage Tank Program I. Agency Information Date: 3-26-96 Agency Name: KERN COUNTY ENVIRONMENTAL HEALTH SERVICES DEPT. Address: 2700 "M" STREET, SUITE 300 City/State/Zip: BAKERSFIELD, CA 93301 Phone: (805)862-_8757_ Responsible Staff Person: DAN STARKEY Title: HAZARDOUS MATERIALS SPECIALIST II. Case Information Site Facility Name: CHICO & THE MAN Site Facility Address: 231 EAST 18th STREET RB LUSTIS Case No: 150040 I Local Case No: 150040 I LOP Case No: 150040 URF filing date: 3-26-96 SWEEPS No: 17785 Responsible Parties Addresses Phone Numbers VIRGINIA NIELSEN C/O GENE BOLTON P.O. BOX 11324, MIDLAND, TX 79702 !Tank No. Size in Gal. Contents Closed in-Place/Removed Date I 2000 GAS REMOVED JULY 30, 1989 2 500 GAS REMOVED SAME 3 500, #4-500 GAS REMOVED SAME II1. Release and Site Characterization Information Cause and type of release: HOLES IN TANKS Site characterization complete? X~ Yes [] No I Date approved by oversight agency: MARCH 1, 1994 Wells Installed? [] Yes X~] No I Number: 0 { Proper screened interval? [] Yes [] No Monitoring Highest GW depth below ground surface: 200 FEET I Lowest depth: 230 I Flow direction: SOUTHEAST Most Sensitive Current Use: VACANT LOT Are drinking water wells affected? [] Yes X~ No Aquifer name: Is surface water affected? [--] Yes X~ No Nearest/affected SW name: Off-site beneficial use impacts (addresses/locations): NONE Report(s) on file? )ti Yes [] No I Where is report(s) filed? KCEHSD Treatment and Disposal of Affected Material Material Amount (Include Units) Action (Trealment or Disposal w/Deslinalk)n) Date Tank 4 RECYCLING VALLEY TREE CONSTRUCTION, BAKERSFIELD JULY 30, 1989 Piping UNKNOWN SAME SAME Free Product NONE Soil 6280 CUBIC yARDs VAPOR EXTRACTION MARCH 26, 1996 Groundwater NONE Barrels NONE HMI03 Case Closure Summary Page 2 LeaKing Underground Fuel Storage Tank Program II. Release and Site Characterization Information (continued) Maximum Documented Contaminant Concentrations - - Before and After Cleanup Soil (ppm) Water (ppm) Soil (ppm) Water (ppm) Contaminant Contaminant Before Alter Before After Before After Before After TPH *(Gas) 14,000 680 Xylene 2,000 ! 20 TPH (Dissel) N^ Ethylbenzene 370 Benzene 190 24 Oil & Grease NA Toluene 1,500 120 Heavy metals NA Other Other Comments (Depth of Remediation, etc.): THIS PLUME HAD A TOTAL DEPTH OF 45 FEET. VAPOR EXTRACTION WAS STARTED IN DECEMBER 95 AND RAN UNTIL MARCH 96. THE CONFIRMATORY BORING DRILLED ON 3-25-96 SHOWED CONTAMINATION ND DOWN CLOSE TO 40 FEET. THE LEVELS RECORDED ABOVE ARE FROM THAT DEPTH. THE CONTAMINATION DECREASED TO TPH 160 PPM AT 45 FEET, AND NON-DETECT FOR ALL CONTAMINANTS AT 50 FEET. THE REASON THE 40 FOOT SAMPLE HAD THE HIGHEST LEVELS IS THAT THE SOIL AT THAT DEPTH CONSISTED OF A SILTY SAND THAT HELD THE CONTAMINANTS TIGHTER THAN THE SANDS. IV. Closure Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? X~ Yes [] No Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? X~ Yes [] No Does corrective action protect public health for current land use? X[~ Yes [] No Site management requirements: NONE Should corrective action be reviewed if land use changes? [] Yes X~ No Monitoring Wells Decommissioned: [] Yes [] No I Number D~omml~ioned: List enforcement actions taken: NONE Number Retained: List enforcement actions rescinded: NONE V. Local Agency Representative Data MARCH 26, 1996 VI. RWQCB Notification Date Submitted to RB: I RB Response: RWQCB Staff Name: I Title: I Date: VII. Additional Comments, Data, etc. IITHIS SITE IS NOW CONSIDERED A LOW RISK SITE AND IS BEING CLOSED AFTER THE MAJORITY OF CONTAMINATION HAS IBEEN REMOVED. HM103/150040 ENVIRONMENTAL HEALTH Sr..~ICES DEPARTMENT. STEVE McCALLEY, R.E.H.S., Director 2700"M" STREET, SUITE300 BAKERSFIELD, CA 93301 Phone: (805)862-8700 FAX: (805) 862-8701 ~SOURCE MANAGEMENT AGENCY DA VID PRICE III, RMA DIRECTOR Engineering & Suwey Services Deparlment En~lronmenlal Health Services OelOartment Planning Department Roads Department Gene Bolton Pro-Tech Specialties P.O. Box 11324 Midland, Texas 79702 March 6, 1996 Subject: Location: 231 E. 18th Street, Bakersfield, CA Known As: Chico & the Man Permit #: 150040 Dear Mr. Bolton: This Department has reviewed the confirmation soil assessment workplan dated February 1996 prepared by AEC Inc. for the above- referenced facility. This workplan is satisfactory for the investigation of remaining contamination present at this underground tank site. Please notify this office 48 hours prior to retrieving soil samples. Within thirty (30) days after sampling and laboratory analyses are completed, a comprehensive report describing the extent of the contamination plume must be submitted to this office for review. The report should discuss recommendations for site closure. If you have any questions, please call me at (806) 862-8757. Sincerely, By: Dan Starkey Hazardous Materials Hazardous Mat%rials Specialist Management cc:AEC Inc. 4400 Ash Rd. #206 Bak. CA 93313 starkey/150040 .ver STATE OF CALIFORNIA - CALIFORNIA ENVIROF _ PROTECTION AGENCY STATE WATER RESOURCES CONTROL BOARD DIVISION OF CLEAN WATER PROGRAMS 2014 T STREET, SUITE 130 P.O. BOX 944212 SACRAMENTO, CALIFORNIA 94244-2120 (916)227-4307 (916)227-4530 (FAX) PETE WILSON, Governor 0 ? 199 i Mr. Gene Bolton P.O. Box 11324 Midland, TX 79702 UNDERGROUND STORAGE TANK CLEANUP FUND, CLAIM NO.71, VIRGINIA NIELSEN (CLAIMANT), 'I8TH STREET EAST AND SONDRA STREET, BAKERSFIELD, CA (SITE) In response to your February 26, 1996 letter, I have the following comments: With regard to the cleanup process at the subject site, you state "...I wish to persevere in this endeavor until we have convincingly protected our water table. However my contractor and other professionals feel that we may have worked the project to acceptable completion." You conclude by stating "We will continue operations until notified otherwise." As you may have heard, the Lawrence Livermore National Laboratory has presented a final report to the State Water Resources Control Board entitled "Recommendations to Improve the Cleanup Process for California's Leaking Underground Fuel Tanks". The findings of the report indicate that passive bioremediation should be considered as the primary remediation tool in most cases once the fuel leak source has been removed. As a result of the findings, it has been determined that "low risk" soil only cases be closed. With regard to "low risk" groundwater cases, active remediation should be replaced with monitoring to determine if the plume is stable. You should contact your local regulating agency and inquire if this is considered a "low risk" site. The Fund will only reimburse costs incurred for corrective action if the corrective action work is directed by the local regulating agency. If your contractor feels that the site has been remediated to acceptable standards, they should present their recommendation to the local agency. In addition, in order to ensure that any future costs are reimbursable from the Fund, you must submit proposed activity(ies) and their associated costs to this office for cost pre- approval. If you have any questions, please contact me at (916) 227-4486. Sincerely, ORIGINAL SIGNED BY Steve Parada UST Cleanup Fund Reimbursement Section cc: County of Kern 2700 M Street, Suite 300 Bakersfield, CA 93301 Regional Water Quality Control Board 3614 East Ashlan Avenue Fresno, CA 93726 · ADVANCED ENVIRONMENTAL CONCEPTS INC~. Advanced Environmental Concepts, Inc. is pleased to present the following: CONFIRMATION BORING ASSESSMENT REPORT for Chico and the Man Service Station 23'1 East '18th Street County of Kern · Bakersfield, California This report has been prepared for: Gene Bolton, Pro-Tech Specialties Prepared: April '1996 · ENVIRONMENTAL CONCEPTS WITH E~ESK~N IN MIND · 4400 ASHE ROAD. #206 ·BAKERSFIELD. CA93313 805/831-1046 * FAX 805/831-1771 Confirmation Boring Assessment Report Advanced Environmental Concepl$, Inc. Table of Contents ~1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 ~9.0 ~0.0 INTRODUCTION BACKGROUND SITE CHARACTERISTICS 3.'1 Site Description 3.2 Regional Geology 3.3 Local Geology 3.4 Hydrogeology EXTENT OF HYDROCARBON MIGRATION 4.~ Soil Plume ASSESSMENT ACTIVITIES 5. ~ Decontamination Procedures 5.2 Soil Borings ANALYTICAL RESULTS 6.t Soil Samples 6.2 Residual Extent of Hydrocarbons CONCLUSIONS RECOMMENDATIONS LIMITATIONS CLOSING Paf:/e 3 3 4 4 4 4 4 5 5 5 6 6 6 7 8 9 Appendices: IA) (B) [C) Project Maps / Figures Boring Logs Laboratory Reports / Chain-of-Custody Documents Project: AEC 96V-~637 ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 * BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Confirmation Boring Assessment Report Advanced ~nvironmental Concepts, Inc. t .0 INTRODUCTION This report presents the results of a confirmation soil investigation conducted by Advanced Environmental Concepts, Inc. [AEC) to evaluate the effectiveness of the vapor extraction system IVES) operating at the Chico and the Man Facility, 231 East 18th Street, Bakersfield, California [Appendix A, Figure t]. Contained in this report is background information regarding ex!sting site characteristics, regional geologic and local hydrogeological profiles, and the project history. Also included in the following sections are the objectives and scope of investigation, detailed investigative procedures, and subsequent findings. Finally, AEC provides an evaluation of said findings and makes related conclusions and recommendations. The report appendices contain project maps and figures [Appendix A), soil boring logs [Appendix BI, and laboratory reports/chain-of-custody documents (Appendix Cl. 2.0 BACKGROUND On April 21, 1989 Valley Tree Construction supervised the excavation, removal, and disposal of four gasoline UST's from the subject site. Very strong gasoline odors were noted in the soil during the excavation procedures. Former tank locations and sample locations are presented on Figure 2 [Appendix A); The analytical results of soil samples collected from below the removed UST are presented in Table I. Units are in milligrams per kilogram (mg/kg] which are equivalent to parts per million (ppm). Table t A~aly~cal Results - Soil Samples Tank Removal 4121189 [ppm] Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene TH-t-2' 6900 3t0 920 12t0 220 TH-I-6' 5600 210 690 t085 190 TH-2-2' 4300 150 550 670 t40 TH-2-6' 7000 230 930 1520 280 TH-3-2' 5000 85 490 1230 210 TH-3-6' 2500 15 100 472 70 TH-4-2' ND ND ND ND ND TH-4-6' ND ND ND ND ND TH-5-2' ND ND ND ND ND TH-5-6' ND ND ND ND ND TH-6-2' ND ND ND ND ND TH-6-6' ND ND ND ND ND Project: AEC 96V-t637 t · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA 93313 805/831-1646 " FAXS05/831-1771 Confirmation Bodng Assessment Report Advanced Environmental Concepts, Inc. Sample I.D. TPH-g Table I [continued] Analytical Results - Soil Samples Tank Removal 4121189 [ppm] Benzene Toluene Xylenes Ethylbenzene TH-7-2' ND TH-7-6' ND TH-8-2' ND TH-8-6' ND TH-9-2' ND TH-9-6' ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Delectlon LImE 1.0 2.0 2.0 5.0 2.0 ND: TPH-g: Non-detected Total Petroleum Rydrocarbans as gasoline Based on these results, KCEHSD required that a site assessment evaluating the lateral and vertical extent of hydrocarbon impacted soil be performed. On December 12, 1993, four soil borings (B-I, B-2, B-3, and B-4) were drilled on the subject property. The borings were positioned to evaluate the vertical and horizontal extent of the hydrocarbon migration and advanced using a truck-mounted Mobile B-61 drill rig, equipped with 8-inch O.D. continuous flight, hollow-stem augers. Borings t, 2, and 4 were drilled to a total depth of 60 feet BGL and boring 3 was drilled to 30 feet BGL. Soil boring locations are plotted on Figure 3. Selected soil samples from these borings were submitted to Associated Laboratories, Inc., of Orange, California and analyzed for total petroleum hydrocarbons as gasoline (TPH-g] and volatile aromatics [BTXE) using CA DHS and EPA 8020 method, respectively. The analytical results are presented in Table 2. Units are in milligrams per kilogram [mg/kg], which are equivalent to parts per million [ppm]. TABLE 2 Analytical Results Soil Borings 12115/93 [pp } Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene BI-20 ND ND ND ND ND BI-30 ND ND ND ND ND BI-40 t I 0,80 2.0 0.93 0,11 Bt-50 t3 ND ND ND ND BI-55 19 0.08 0.t5 0.06 ND Bt-60 ND ND ND ND ND Project: AEC 96V-1637 2 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 805/831-1646 * FAX 805/831°1771 Confirmation Boring Assessmenf Report Advanced Environmental Concepts, Inc. TABLE 2 [continued] Analytical Results Soil Borings t21t5/93 (ppm) Sample I.D. TPH-g Benzene Toluene Xylenes Ethylbenzene B2-15 4300 ND 2.2 380 4.3 B2-25 2600 0.20 35 300 40 B2-30 9800 45 910 1400 250 B2-35 2700 2.7 130 350 55 B2-40 14000 190 1500 2000 370 B2-45 39 0.23 2.0 3.4 0.56 B2-50 4.6 ND 0.85 0.20 ND B2-55 10 0.08 0.02 0.10 0.0t B2-60 15 ND ND ND ND B3-20 42 ND ND ND ND B3-30 2700 12 200 340 56 B4-30 70 0.1 t 1.5 1.3 4.4 B4-50 16 ND 0.01 0.039 ND B4-60 17 0.02 0. I 0.16 0.02 D.L.[mg/kg] t.0 0.005 0.005 0.005 0.005 ND: D.L. Non-detected at indicated limit of detection Detection Limit Upon review of the assessment results KCEHD required that remediation activities be undertaken to obtain acceptable hydrocarbon concentrations. On December 4, 1995 a vapar extraction system was installed and it's operation initiated. Vapor extraction points are presented on Figure 2. Initial vapor concentrations were measured at 9 I% of the lower explosive limit [LEL) and after eighteen days of operation had decreased to 2 I% of the LEL. After allowing the formation to rest for 17 days the LEL returned to 49% then dropped off to 11% af the LEL after 30 days of the operation. The formation was allowed to rest again for 14 days and a vacuum was reinduced which resulted in the LEL level returning to 52% and decreasing to less than 10% in 3 days and to 7% in 7 days. This pattern of LEL readings indicate that a reduction in hydrocarbons has taken place, for this reason AEC submitted a Confirmation Boring Workplan to KCEHD, On March 21, 1996 AEC implemented the work plan and this report presents the results. 3.0 SITE CHARACTERISTICS The following sections summarize the project site features and conditions along with regional and local geological and hydrological characteristics. Project: AEC 96V-1637 3 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 * BAKERSFIELD. CAg3313 805/831-1646 * FAX 805/831-1771 Confirmation Boring Assessment Report Advanced Environmental Concepts, Inc. 3.t Site Description The Chico and the Man Service Station is located on the southwest corner of the intersection of East ~8th and Sonora Streets, in Bakersfield, California. The general area is comprised of light industry and related services. The subject site is at an average elevation of 385-feet above mean sea level with minimal topographic relief. The property is presently a vacant lot. 3.2 Regional Geology The subject property is located in the Southern San Joaquin Valley [Valley] which is a part of the Central Valley of California. The Valley forms the southern two-thirds of the Central Valley and is characterized as a broad structural trough. It is bordered on the east by the Sierra Nevada Range and on the west by the Coast Range [Diablo and Temblor Mountains]. The Valley extends 250 miles southeastward from the confluence of the San Joaquin and Sacramento Rivers to the Tehachapi and San Emigdio Mountains. The width ranges from 25 miles wide near the Kern River to approximately 55 miles wide near the Kings River, with an approximate average width of 40 miles. Geology of the southern Valley consists of a Pre-Tertiary basement complex overlain by marine and non-marine sedimentary rocks of Tertiary age. These rocks are composed of consolidated sandstones, siltstones and shales which thicken from northeast to southwest. The Valley was once an inland sea of comparatively shallow depth that continued to subside due to the ever increasing load of' sediments transported and deposited from higher elevations. These, deposits consist of gravels, sands, silts and clays. The majority of the groundwater pumped from the Valley floor occurs within these relatively unconsolidated continental deposits, 3.3 Local Ccology The investigated property is. located on alluvial deposits, created from sediments transported and deposited by local streams, and during flood stages of the Kern River. The site is situated in a Iow to moderate energy flood plain environment consisting of weakly consolidated to unconsolidated, poorly bedded sands and silts. 3.4 Flydrogeology Ground and surface water in the central Bakersfield area is regulated by the Kern County Water Agency. According to the Kern County Water Agency "Water Supply Report-t994", depth to groundwater in unconfined and equivalent wells is estimated at 240-feet below grade level [BGL] at the site. No perched water bearing zones are reported in the area. The water agency's map showing depth groundwater is presented on Figure 4. Project: AEC 96V-t637 4 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 * BAKERSFIELD. CA 93313 805/831-1646 * FAX 8051831-1771 Confirmation Boring Assessment Report Advanced Environmental Concepts, Inc. 4.0 EXTENTOF HYDROCARBON MIGRATION 4.'1 Soil Plume The original soil plume as depicted by the analytical results indicated that significant hydrocarban concentrations extended to a depth of 45 feet BGL, and the highest concentration, 14,000 ppm, was detected in B-2 at 40 feet BGL. Hydrocarbon levels below 100 ppm were detected in B-I and B-4, and below 40 feet BGL in B-2. Plume dimensions are approximately 60 feet deep by 60 feet wide and forms a nonsymmetric, elongated, spheroid shape that occupies approximately 6,200 cubic yards. The highest concentrations of hydrocarbons are contained within about 785 cubic yards. The areal extent of the original hydrocarbon plume is shown on Figure 3 and a cross-sectional view is presented on Figure 5. 5.0 ASSESSMENT ACTIVITIES 5. t Decontamination Procedures Prior to initiating drilling operations, the augers and associated drilling equipment were thoroughly cleaned using a high-pressure steam-cleaner. In addition, the soil sampler and hand auger were washed in an Alconox solution and double-rinsed in clean, deionized water prior to initial use and between each sampling interval to minimize the possibility of cross-contamination between samples. 5.2 Soil Borings On March 21, 1996 one soil borings (CB-I) was advanced through the center of the former hydrocarbon plume for the purpose of evaluating the effectiveness of the mitigation actions conducted the subject site. The borings were advanced using a truck- mounted, Mobile B-53 drill rig equipped with 8-inch O.D. continuous-flight, hollow-stem augers. The boring location is plotted on FigUre 3. Soil samples were collected at 15, 25, 35, 40, 45, and 50 feet BGL by driving a thin-walled steel sampler equipped with three 2-inch X 6-inch brass sleeves a minimum of 18 inches into previously undisturbed soil. The sampler was driven ahead of the augers using a 140- lb. slide hammer with a 30-inch vertical fall. Following each sample drive, the sampler was withdrawn from the borehole and the three brass sleeves were removed. The bottom sleeve was retained for laboratory analysis and prepared by placing Teflon tape and plastic caps over each end, then securing the caps with tape. The samples were labeled, recorded on a chain-of-custody document and placed in an ice chest chilled with Blue Ice and block ice. Soil exposed at each end of the center brass sleeve, as well as the cuttings, were examined for lithological purposes and far any obvious evidence of hydrocarbons. Lithologic descriptions were logged according to the Unified Soils Classification System (USCS] [Appendix B]. Chain-of-custody protocol was strictly followed to ensure sample integrity and traceability. Upon completion of the above-described procedures, the three borings were plugged with hydrated bentonite followed by a cement slurry to grade level. Project: AEC 96V-1637 5 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4't00ASHEROAD.#206 *, BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Confirmation Boring Assessment Report Advanced Environmental Concepts, Inc. 5.2.t Soils Profile The soil profile at the site Consists of silty sands, "clean" sands, and poorly' sorted sands to a total drilled depth of 60 feet BGL. The silty' sands [SM-ML] are commonly tan-brown, slightly to very compact, commonly friable, and slightly to moderately moist. The "clean" sands [SW] are olive gray-buff, moderately dense, unconsolidated, and slightly moist. The paorly sorted sands [SP-GC] commonly consist of olive-gray to white, moderately to very dense, unconsolidated to very consolidated, and slightly moist. The sediments are typical of Iow to moderate energy fluvial deposits subjected to periodic reworking during flood stages. The strata were loosely compacted due to the increasing weight of the overlying sediments. 6.0 ANALY11CAL RESULTS 6.t Soil Analyses Soil sample analyses were performed by SMC Labaratory, Inc., a California-certified laboratory, to determine the presence and concentration of tatal petroleum hydrocarbons as gasoline (TPH-g) and volatile aromatics [BTXE) by CA DHS and EPA method 8020. The analytical results are tabulated below, and the laboratory reports are provided in Appendix C. Units are in milligrams per kilogram (rog/kg] which are equivalent to parts per million [ppm]. Table 3 Analytical results - Confirmation Borings 312 t/96 [ppm] Sample I.D. TPH-g Benzene Toluene Ethylbenzene Xylene CB-1-15' 98 ND ND CB-1-25' ND ND ND CB-t-35' ND ND ND CB-I-40' 680 24 120 CB-1-45' 160 4.2 23 CB-1-50' ND ND ND ND ND ND ND ND ND 21 120 4,9 31 ND ND Detection Limit (rog/kg] 1.0 0.005 ND: Non deteoted TPH-g: Total Petroleum Hydroaarbons as Gasoline 0.005 0.0'15 0.005 6.2 Residual Extent of Hydrocarbons Analytical results recorded TPH-g concentrations of 98 ppm, 680 ppm, and 160 ppm for soil samples CB-I-15', CB-1-40', and CB-I-45', respectively. All other soil samples were below detectable limits for all constituents analyzed. These laboratory results portray a post treatment plume that is discontinuous and fragmented into isolated segments. The post treatment plume is show in comparison to the pre-treatment plume on Figure 6. Project: AEC 96V-1637 6 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400ASHEROAD.#20(~ ° BAKERSFIELD. CAg3313 805/831-1646 * FAX 805/831-1771 Confirmation Boring Assessment Report Advanced in~vironmental Concepts, Inc. The highest recorded TPH-g concentration in the untreated plume was 14,000 ppm at a depth of 40 feet BGL. A TPH-g concentration of 680 ppm was recorded in soil sample CB-I- 40' which was collected from the past treatment plume at the same relative position within the plume and represents a 95% change (reduction) in hydrocarbon concentration. The 40 to 45 foot interval is represented by a silt and clayey silt layer which acts as a retarding layer for downward fluid migration. Fine sand, silt and clay soil types have a residual capacity for gasoline of 7,500 ppm (APl 1989) which is about 1 IX greater than the post treatment recorded high of 680 ppm TPH-g collected from this interval. Given the potential residual capacity of the silt layer, the recorded residual concentration and the absence of overlying contaminants it is highly unlikely that any further downward migration will occur or that the underlying groundwater located approximately 200 feet below the bottom of the residual plume will be impacted. 7.0 Based CONCLUSIONS on the results of the soil and groundwater investigation AEC tenders the following findings: In t989 four UST's were removed from the Chico and the Man facility; Analytical results for the soil samples collected during the tank removal activities indicated that an unauthorized release had occurred. Four soil borings were advanced for the purpose of evaluating the extent of hydrocarbon migration in the soil; After all assessment work was performed the hydrocarbon plume in the soil was estimated to extend to a depth of 45 feet BGL with the highest concentration, 14,000 ppm, being detected in B-2 at 40 feet BGL. Plume dimension were approximately 60 feet deep by 60 feet wide and formed a nonsymmetrical, elongated, spheroid shape that occupied approximately 6,200 cubic yards. A vapar extraction system was installed and operated from November, t995 to the present. Initial vapor concentrations were measured at 91%of the lower explosive limit [LEL] and after eighteen days of operation had decreased to 21% of the LEL. After allowing the formation to rest for t7 days the LEL returned to 49% and dropped off to 1 I% of the LEL after 30 days. The formation was allowed to rest again for 14 days and a vacuum was reinduced which resulted in the LEL level returning to 52% and decreasing to less than 10% in 3 days and to 7% in 7 days. One confirmation boring was advanced through the center of the former hydrocarbon plume and analytical data collected indicated that the high TPH-g concentration of 680 ppm was present in CB-I at 40 feet BGL and a Iow TPH-g concentration of 98 ppm at 15 feet BGL. This is a -95% (reduction] change from the previous recorded high-concentration of t4,000 ppm. Confirmation baring data also revealed that no contaminated soil interval exceeded 10 feet in thickness and no contaminated soil was detected below 45 feet BGL. Project: AEC 96V-1637 7 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 * BAKERSFIELD. CA93313 805/831-1646 · FAX 805/831-1771 Confirmation Boring Assessment Report Advanced Environmental Concepts, Inc. The distance between the migrated plume and underlying groundwater is approximately 200 feet. 8.0 RECOMMENDATIONS Based on the results of the confirmation sampling and the findings presented in this report AEC concludes that there has been a significant volumetric reduction of detectable hydrocarbons in the soil and that the hydrocarbon plume is stable and poses no threat to the underlying groundwater. For these stated reasons, AEC recommends that no further remedial action be required and that final site closure be granted. 9.0 UMITATIONS This work has been performed in accordance with generally-accepted environmental science and engineering practices. The soil samples for this project were obtained as directed by the on- site regulatory agency representative, hence the. analytical results are indicative of discrete samples and are not meant to be misconstrued or representative of unsampled subsurface areas. Conclusions and recommendations are based upon information collected and compiled during this Investigation. No other warranty, expressed or implied, is given. Project: AEC 96V-t637 8 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND 4400 ASHE ROAD. #206 ° BAKERSFIELD. CA 93313 805/831-1646 · FAX 805/831-1771 Confirmation Boring Assessment Report Advanced Environmental Concepts. Inc. 10.0 CLOSING Advanced Environmental Concepts, Inc. appreciates the opportunity to be of 'service to Chico and the Man on this project. If there should be any questions or additional information required regarding this report, please do not hesitate to contact our office at (805) 831-t646. This Environmental Site Assessment has been prepared by'. Advanced Environmental Concepts, Inc. /tos4)h A. Dunwoody ~ //Registered Geologist ~§§04 / Certified Hydrogeologist ~'156 This Environmental Site Assessment has been review, ed by: ~~rkonmental Assessor 'I 508 Project: AEC 96V-t637 9 · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIND · 4400 ASHE ROAD. #206 ~' BAKERSFIELD. CA g3313 805/831-1646 * FAX 805/831-1771 · ENVIRONMENTAL CONCEPTS WITH DE,~GN IN ~ *, 4400 ASHE ROAD. #206 · BAKERSFIELD. CA 93313 8051831-1646 "* .FAX 805/831-1771 :' . . " KERN I I BRUNDAOE ~ AEC Chico and the Man Service Station 1 231 East 18th Street ADVANCED ENVIRONMENTAL CONCEPTS County of Kem· Bakersfield, CA P.O. BOX40672 BAKERSRELD, CA 93384 EAST 18th STREET ................. TH FORMEFI PIPING , ~.,,,,,,,,,.;..;,,,.,,,.,..,,,., ...... ,,....,,.,,,.,,[~ o ii ) TH-1 TH-1 SAMP~ I.D. ~ .......................................................................................... ~ SAMPLE L~ATION , sc~ d ~ Ohi~ ~d ~e M~ Se~ S.fion 231 East l~h ~reet ~V~CED E~RONME~AL CONC~ of Kern ~ersfield, CN~omia P.o. Box ~ B~R~, C4 ~ ~un~ E. 18th STREET BUILDING VACANTLOT FENCE FORMER TANK PIT VE-2 \ VE-4q~iD · CB-1 it'" / t / SOIL BORING LOCATION EXTRACTION WELL CONFIRMATION BORING SCALE ~ I 1"=10' AEC ADVANCED ENVIRONMENTAL CONCEPT~ P.O. BOX 40672 BAKERSFIELD, CA 93384 - Boring and Vadose Well Map- Chico and the Man Service Station 231 East 18th Street County of Kern · Bakersfield, California FIGURE 3 EAST PIPE! ~r--~[] DDDDDI r-~r-lr-l[ r-q~E~3i KERN CO~JNTY WATER AGE, NCY IMPROVEIVlENT OISTRICT NO 4 Bakl~IELD. C~LIFOI~IIA DEPTH TO WATER IN WELLS September 1994 AEC ADVANCED ENVIRONMENTAL CONCEPTS P.O. BOX40672 BAKERSFIELD, CA 93384 - Depth to Groundwater Map - From Kern County Water Agency Chico and the Man Service Station 231 East 18th Street County of Kern · Bakersfield, California FIGURE 4 NORTH e e SOUTH ^ ^' B4 B3 B2 B1 .-- ZONE OF >1,000 ppm 4.6 =' 50' II -~-1" = 10' I ~ i~ Chico and the Man Service Station 5 231 East 18th Street ADVANCED ENVIRONMENTAL CONCEPT~ P.O. BOX40672 BAKERSFIELD, CA 93384 County of Kem· Bakersfield, Califomia NORTH SOUTH A CB- 1 o_ [-1" = 10' - SCALE ND HYDROCARBONS 10' 0 01 -- 50' -- 60' Post Remediation FIG U R E AEC -Hydrocarbon Plume- Chico and the Man Service Station 6 ADVANCED ENVIRONMENTAL CONCEPT~ 231 East 18th Street P.O. BOX40872 B,4KERSFIEI..D, CA ~384County of Kem· Bakersfield, Califomia Advanced Environmental Concepts, Inc. · ENVIRONMENTAL CONCEPTS WITH DESIGN IN MIM3 * 4400 ASHE ROAD. #206 * BAKERSFIELD. CA 93313 8051831-1646 * FAX 8051831-1771 ~I,PLE ~O U.S.C.S.~ ~O WELL DEPTH PID ~I[RVAL LI GIC DESCRIPTION DETAIL (ppm) a.OWCX3UNT LOG ~- 10 --- 0 15 SILTY SAND (SM): Ye~ brow~ to red brown, 30% stir ~ 19B Ioo~e, tr mica, no odo~, poorly srted, mod dllatallcy. --- 25 m __ 0 25 SP tlm3ollsolidal~10 flnegreined, sll~hl~ moist, no AEC V OGOE RON , / NOE WE/L/BORING LOG P.O. BOX 40~7~ BAKERSFIELD, OA g~84 PRC~ECT Chleo~lt~eMnnlGefleBolton LOCATION ~1E. 18~hS~'eet, B~ke~'fleld, C~lifomi'~ WEM./BOR~Ne NO. CB-1 SURFACE ELEV^TION Wl~,,.H~ £LEV^TION H/A DATE DR, ~ KO ~1/'9e LOGG£D BY J. Dur~ REVIEWEO BY J, DUNWOC)DY DRILUN43 COMPANY Melton Ddlli~ Oempeny DRILLER Rm~v 3er~=n METHOD i-lOLl.OW S'l'l:.ld AUC~ER , BORE HOIJ~ DI,~IETE'R $ INOH TOTAL OEPTH SO' DGPTI'! TO WATER: IN[I'~ N/A ... S?~?IO CA~ING TYPE DIAIdETGR SCHEDULE INTGRVAL N~A TO --- SCREEN TYPE DI,4J~ET~R. SLOT SIZE INTERVAL NIA .TO ...... -N/ FILTER PACK TYPG IHTERVAL H/A .TO ~NJ~ SURFACE SE~J. TYPE INTERVAL N/A TO N/A NOTES DETAIL (ppm) LOG UT OGIC DESCRIPTION "-- 35m lO lO · sP SAND(SP): Grey to whito.flne to cse. poorly 18B srted, moderately dense, unconsolidated. -- 25 flnegralned, slightly mol~ no apparent hydrocarbon odor. ~ 40 ~ 550 8 I ML SILT (ML): Tan-brown, moderately em~pact, stiff, clayey in 18 I SM/ML SILTYSAND/SILT (SM?ML): redbrowntoyellbm.50% sand. --- 50 m 0 19 ~ SP SAND (SI3): Reddish-brown, moderately dense. -- 31g unconsolidated, flnegraJned, slightly moist, no 38 apparent hydrocarbon odor. ,, 55 ---- ~ 65 ~ ,~OWCEOE~Ro~v/~'~r,~/. co~c~,7~ WELL/BORING LOG ~ o~ ~ PROJECT CHICO AND THE MAN LOCATION 231 East 18th St~et. Bakersfield, CaJifomla WELL/BORING NO. CB-1 Advanced Environmenk31'Con(~ePts. Inc. 4400 ASHE ROAD. #206 '~. BAKERSFIELD. CA93313 805/831-1646 ,, .'FAX 805/831-1771 Analytical Chemistry certificate ~1049 Client Name: Advanced Environmental Concepts, Inc. Address : 4400 Ashe Road, ~206 Bakersfield, CA 93313 Attention :Jon Buck Date samples collected: 3-21-96 Date samples received : 3-22-96 Date analysis completed: 3-25-96 Date of report : 3-25-96 Project Site: E. 18th Street Bakersfield Project Name: Chico & The Man RESULTS OF ANALYSIS: 498 ID: CB-l-15' mG/kG Benzene ND Ethylbenzene ND Toluene ND Xylenes ND TPH (Gasoline) 98 DLR, mG/kG 0.005 0.005 0.005 0.005 1.0 499 ID: CB-1-25' mG/kG Benzene ND Ethylbenzene ND Toluene ND Xylenes ND TPH (Gasoline) ND DLR, mG/kG 0.005 0.005 0.005 0.005 1.0 500 ID: CB-1-35' mG/kG Benzene ND Ethylbenzene ND Toluene ND Xylenes ND TPH (Gasoline) ND DLR, mG/kG 0.005 0.005 0.005 0.005 1.0 Matrix Type : Soil Method of Analysis for BTEX : EPA 8020 Method of Analysis for TPH (Gasoline) : EPA 8015M TPH : Total Petroleum Hydrocarbons DLR : Detection Limit for Reporting mG/kG : milligram per kilogram (ppm) ND : None Detected Sta~n Come~r, ~c.M. Analytical Chemist 211 Aviation Street · Shafter Airport · Shafter, CA93263 /e~ 'lo~_q~c;7 · FAX (805) 393-3623 Project Site: E. 18th Street Project Name: Chico & The Man RESULTS OF ANALYSIS: 501 ID: CB-l-40' Benzene Ethylbenzene Toluene Xylenes TPH (Gasoline) Bakersfield mO/kG 24 21 120 120 680 DLR, mO/kG 0.005 0.005 0.005 0.005 1.0 502 ID: CB-1-45' Benzene Ethylbenzene Toluene Xylenes TPH (Gasoline) mG/kG 4.2 4.9 23 31 160 DLR, mO/kO 0.005 0.005 0.005 0.005 1.0 i 503 ID: CB-l-50' Benzene Ethylbenzene Toluene Xylenes TPH (Gasoline) Analytical Chemist mO/kG ND ND ND ND ND DLR, mO/kG 0.005 0.005 0.005 0.005 1.0 CHAIN-OF-CUSTODY RECORD Client Prbj~ ~j~ Addr~ ~ S~ple ~i~ ~N~a {~' {~, ~ Chi,~ Y~/ No , ~-i-~ ~_~, ~, ~ ~ 5 I I ~_/~, ~_~, ~~ ~o5 ~ [ l ~ R~inquis~ ~: (Signa~re) Dae ~ R~eiv~ by ~rao~ (Signature) Date -ADVANCED ENVIRONMENTAL CONCEPTS INC~ C~: ~me ~m~: Time J