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HomeMy WebLinkAbout4050 GOSFORD ROAD (50)I1111. Delta Environmental Consultants, Inc. Solving environment- related business problems worldwide 911 South Primrose Avenue • Suite K Monrovia, California 91016 USA 626.256.6662 800.477.7411 Fax 626.256.6263 November 11, 2004 DELTA Project No. PA4050G -1 Mr. Howard Wines III City of Bakersfield Fire Department Prevention Services 900 Truxtun Avenue, Suite 210 Bakersfield, CA 93301 I Re Corrective Action Plan Texaco Service Station 4050 Gosford Road Bakersfield, California Dear Mr. Wines: www.deltaenv.com On behalf of Equilon Enterprises LLC dba Shell Oil Products US (SHELL), Delta Environmental Consultants, Inc. DELTA) submits this Corrective Action Plan (CAP) for the above - referenced site (Figure 1). This CAP has been prepared in response to the City of Bakersfield Fire Department (CBFD) letter dated October 8, 2004 (Appendix A), that requires SHELL to address the methyl tert-butyl ether (MTBE) impacts to soil beneath the site. This report has been prepared to comply with the California Code of Regulations, Title 23, Division 3, Chapter 16, Article 11. Provided below is site background information followed by a remedial action plan. All work will be performed under the supervision of a California- registered geologist and/or professional civil engineer. BACKGROUND SITE DESCRIPTION The subject site is currently an active Texaco service station located on the northeast corner of the intersection of Gosford Road and White Lane in Bakersfield, California (Figure 1). The site is located in a commercial and residentially mixed area of Bakersfield. The service station consists of three 10,000 - gallon and one 12,000- gallon gasoline underground storage tanks (USTs), two dispenser islands each equipped with two multi - product dispenser pumps, a carwash and a station building (Figure 2). A member nf. XInogetEnvlro=enml Alliance e t November 11, 2004 Page 2 SITE BACKGROUND Previous environmental activities at the site are summarized in the table below. Available well and boring data is included as Table 1. SUMMARY Date Activity / No. of Borings / Report Consultant CommentsMethodSamplesDate Phase II 6 Soil Borings Pacific Petroleum hydrocarbons 1 /00 environmental 1313-1 through Unknown Environmental detected in soil (BB -1, BB -2 site assessment 1313-6) Group (PEG) and 1313-6) Soil sampling TPH -g and TPH -d detected 7/01 during SB989 Unknown Unknown IT With max. concentration of 210 upgrade activities mg/kg. Max. MTBE detected at 13 mg/kg Confirmation samples - TPH -g Over - excavation 50 cubic yards and TPH -d detected with max. 7/01 activities of soil removed. Unknown IT concentration of 7.9 mg/kg. Max. MTBE detected at 16 mg/kg 6 soil borings to Site assessment maximum 65 Maximum MTBE 6/03 activities feet bgs (1313-7 7/21/02 WGR concentrations in soil; 16 through BB -1 2) mg/kg. 8 soil borings to Maximum MTBE and TBA 5/03 Site assessment maximum 85 6/16/03 WGR concentrations in soil; 47 activities feet bgs (BB -13 mg/kg and 16 mg/kg, through 1313-20) respectively. 5 nested SVE All wells 2 -inch Schedule 40 9/03 SVE well wells (VEW -1 10/27/03 WGR PVC with 0.020" slottedinstallationthroughVEW- 5) screen 1 Y: \_Shell SH-1405U CxrsfaM201M- 11- 111.m iwAction PiwTo —tweAction Plan (4050).do e t November 11, 2004 Page 3 SUMMARY (CONT.) Date Activity / No. of Borings / Report Consultant Comments Method Samples Date Site tested to obtain data on vapor extraction parameters for use to design a SVE remediation system. ROI up to 25 feet for wells screened in 12/03 SVE Pilot Test 2/9/04 DELTA the shallow zone and 33 feet for wells screened in the deep zone. TPH -g mass removal rates estimated at 53.9 lbs /day and MTBE mass removal rates estimated at 37.5 lbs /day Update to Results Submitted revised SVE ,test 4/2004 of SVE Pilot 4/15/04 DELTA calculations which resulted in increased values for flow andTests mass removal rates 6/2004 Second Quarter 6/30/04 DELTA2004Update 10/2004 Third Quarter 101151 DELTA2004Update SITE SPECIFIC GEOLOGY AND HYDROGEOLOGY The geologic conditions in the site vicinity are characterized from alluvial deposits underlain by marine and non - marine sedimentary units, metamorphic rocks and crystalline basement material. Surface and near - surface conditions as designated by the U.S. Geological Survey are older alluvium, deposited in northwest- dipping alluvial fans resulting from outwash from the Sierra Nevada mountain range to the east. This alluvium is composed primarily of poorly graded and unconsolidated sands, sandy gravels and occasional discontinuous lenticular bodies of sandy clay and silt. Regionally, the surface of these old alluvial fans is undulatory, with a distinct dip toward the Kern River to the northwest of the site. The site itself is located along one of the crests of the alluvial fan surface "ripples" at an elevation of approximately 390 feet above mean sea level. The total thickness of the alluvial fan deposits is estimated to range from approximately 600 feet west of the site to over 4,000 feet near the Sierra Nevada Mountains. 1 1:\_1.- S1IGSWMl14(ICm1fnrd.1164 -11 -I IS.—I. Action Plan,Cm fi,v Ai. Pl- (4050).A. 1 C 1 7 November 11, 2004 Page 4 1 The site lies within the Edison hydrogeologic sub -area of the Edison Maricopa area. Uppermost groundwater within this area occurs within the old alluvial fan deposits. In the site vicinity, deeper aquifers of limited areal extent are present in the consolidated non -marine sedimentary units and within fracture zones of the crystalline basement rock. The most prominent subsurface features controlling the groundwater flow direction are the groundwater barriers formed by the northwest to southwest trending Edison Fault and subparallel splays of this fault, located south and north of the site, respectively (WGR, 2003b). Depth to water in the vicinity of the subject site was approximately 160 feet below ground surface (bgs) in October 2002, according to Kern County Water Agency records. The soils encountered at the site during vapor extraction well installation activities during September 2003 consisted primarily of fine- grained sand to approximately 65 feet bgs. A sandy to silty clay layer was encountered above approximately 12 feet bgs. Well construction details are presented on Table 1. WATER WELL SURVEY The nearest drinking water supply well is reportedly 3,698 feet south of the site and identified as State Well No. 30S/27E -20AO1 M and is owned by Kern County Water Agency (WGR, 2003b). HYDROCARBON DELINEATION Detectable concentrations of total petroleum hydrocarbons as gasoline (TPH -g), total petroleum hydrocarbons as diesel (TPH -d), benzene, toluene, ethyl - benzene, and xylenes (BTEX) compounds and MTBE, tert-butyl alcohol TBA), di- isopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), and tert-amyl methyl ether (TAME) [fuel oxygenates] were encountered in soil samples collected during soil boring (BB-1 through BB -20), tank -pull activities, and vapor extraction well installation (VEW -1 through VEW -5). Vapor extraction wells were screened within a shallow zone (screened within the interval of 5 to 30 feet bgs) and deep zone (screened within the interval of 35 to 65 feet bgs). Historical soil analytical data is presented in Table 2. Historical sampling locations are shown on Figure 2. UST Complex. The first hydrocarbon- impacted soil zone is located in the vicinity of the UST pit. This area is identified by soil samples collected surrounding the USTs to the northwest (BB -9, BB -18, VEW -5, and P -3), the southwest (BB -1, BB -11, BB -15, VEW -2, and P -2), the southeast (BB -16 and VEW -3) and the northeast (BB -2, BB -12, BB -17, and VEW -4). In this area, TPH -d was detected in soil borings P -2, BB -1, BB -2, and BB -9. TPH -d was detected at a maximum concentration of 31 mg/kg in soil sample P -2 -10, however this area was subsequently over - excavated to non - detect TPH -d concentrations. THP -d was also identified in the shallow zone (0 to 30 feet bgs) at a maximum concentration of 11 mg/kg (BB -2 @ 25 feet bgs). TPH -d was only detected in one sample BB -9 @ 35 feet bgs) in the deep zone (35 to 85 feet bgs) at a concentration of 2 mg/kg. TPH -g was detected in soil borings P -2, BB -9, BB -11, BB -12, BB -15, BB -17, BB -18, VEW -2, VEW -3, VEW -4, and VEW -5 at a maximum concentration of 15 mg/kg (BB -9 @ 20 feet bgs) in the shallow zone and 12 mg/kg (BB -12 @ 40 feet bgs) in the deep zone. BTEX compounds were detected in soil sample P -2 -10, however this area was subsequently over - excavated to non - detect concentrations. BTEX compounds were not detected in the remaining soil samples, Y: \_Shi315i1 s \4WOSU GosfonA2U0a- II- II_ ComliveAclinn Plan \Cort¢iivcAc inn Plm (4050).dtK I I I I I I I I I I I I I I I I I I I November 11, 2004 Page 5 with the exception of a concentration of 6.6 mg/kg of toluene in soil sample BB -18 at a depth of 65 feet bgs. MTBE was detected in all of the soil boring locations in the area of the USTs. The maximum concentrations of MTBE detected were 51 mg/kg (BB -2 @ 20 feet bgs) in the shallow zone and 29 mg/kg (VEW -3 @ 40 feet bgs) in the deep zone. TBA was detected in soil borings P -2, BB -15, BB -16, BB -17, BB -18, VEW -2, VEW -3, VEW -4, and VEW -5. The maximum concentrations of TBA detected were 29 mg/kg (VEW -5 @ 25 feet bgs) in the shallow zone and 4.2 mg/kg (VEW -5 @ 45 feet bgs) in the deep zone. DIPE, ETBE, and TAME were not detected in soil samples in the area of the USTs. Northern Dispensers. The second hydrocarbon - impacted soil zone is located in the vicinity of the northern-most dispensers. Soil samples were collected surrounding the dispensers to the north (BB -5 and BB -6), the west (BB- 20), and the east (BB -10, BB -19, and P -4) and beneath the dispensers (D -3 and D -4). TPH -d was not detected in any of the soil borings in the area of the northern dispensers. TPH -g was detected only in soil boring BB -10 at a maximum concentration of 0.76 mg/kg (1313-10 @ 25 feet bgs) in the shallow zone and 0.22 mg/kg (BB -10 @ 45 feet bgs) in the deep zone. BTEX compounds were not detected in any of the soil borings in the area of the northern dispensers. MTBE was detected in all of the soil boring locations, which included its analysis, in the area of the northern dispensers. The maximum concentrations of MTBE detected were 0.29 mg/kg (D -3 @ 4 feet bgs) in the shallow zone and 1.4 mg /kg (BB -19 @ 45 feet bgs) in the deep zone. TBA was detected in soil boring BB- 19 in this area. The maximum concentrations of TBA detected were 1.5 mg/kg (BB -19 @ 30 feet bgs) in the shallow zone and 0.87 mg/kg (BB -19 @ 40 feet bgs) in the deep zone. DIPE, ETBE, and TAME were not detected in soil samples in the area of the northern dispensers. Southern Dispensers. The third hydrocarbon - impacted soil zone is located in the vicinity of the southern -most dispensers. This area is identified by soil samples collected surrounding the dispensers to the west (BB -7 and BB- 13), the south (BB -3, BB -4, BB -8, BB -14, and VEW -1) and the east (P -1) and beneath the dispensers (D -1 and D- 2). TPH -d was detected in only one sample (D -1 -4) at a concentration of 210 mg/kg in the area of the southern dispensers. TPH -g was detected in soil borings D -1, P -1, BB -7, 1313-8, BB -14, and VEW -1 at a maximum concentration of 5.8 mg/kg (P -1 -WS @ 20 feet bgs) in the shallow zone. TPH -g was detected at a concentration of 10 mg/kg in soil sample D -1 -4, however this area was subsequently over - excavated to non- detect TPH -g concentrations. TPH -g was detected at a maximum concentration of 1.0 mg/kg (VEW -1 @ 35 and 40 feet bgs) in the deep zone. BTEX compounds were not detected in any of the soil borings in the area of the southern dispensers. MTBE was detected in all of the soil boring locations in the area of the southern dispensers. The maximum concentrations of MTBE detected were 20 mg/kg (BB -14 @ 25 feet bgs) in the shallow zone and 4.8 mg/kg (VEW -1 @ 40 feet bgs) in the deep zone. TBA was detected in soil borings P -1, 1313-13, 1313-14, and VEW -1 in this area. The maximum concentrations of TBA detected were 8.4 mg/kg (VEW -1 @ 25 feet bgs) in the shallow zone and 1.1 mg/kg (BB -14 @ 45 feet bgs) in the deep zone. DIPE, ETBE, and TAME were not detected in soil samples in the area of the northern dispensers. Y:\_Slidl Siic \4440511GosfaM2IXW -I I -1 I_Cortu ivoAction Plxn \CartslivcAdinn Plan (4USU).Jnc 1 F1 1 I I November 11, 2004 Page 6 FEASIBILITY EVALUATION In the following section, DELTA has reviewed the currently applicable corrective actions for addressing the hydrocarbon impacts identified in the soil below this site. Based on DELTA's evaluation of the site conditions and the following evaluation of alternatives, DELTA recommends that natural attenuation with long term monitoring be conducted at this site to address hydrocarbon impacts. APPLICABLE CLEANUP LEVELS AND POTENTIAL EXPOSURE PATHWAYS Based on known site conditions, there is one potentially complete exposure pathway for the subject site, which is vapor inhalation due to impacted soil beneath the site. Other exposure pathways that were evaluated, but not considered complete include: Ingestion of Impacted Groundwater. Direct contact with impacted groundwater is unlikely to occur because the closest receptor well is located 3,698 feet south of the site. In addition, the maximum depth of impacted soil was at 85 feet bgs, while groundwater is reportedly located at a depth of approximately 160 feet (WGR, 2003b). Given that approximately 75 feet exists between the impacted soil and anticipated groundwater depth, and the additional 3,869 -foot distance to the receptor well, it is not likely that groundwater at the receptor well will be impacted. Ingestion of Soil and Dust. Direct contact with impacted soil is unlikely to occur because the site is covered with asphalt and concrete. The potential for soil/dust ingestion may exist during any future construction activities. Risk associated with these activities can be managed though implementation of a health and safety plan to include vapor and dust monitoring and control measures. Dermal Contact with Soils. Direct contact with impacted soil is unlikely to occur because the site is covered with asphalt and concrete. The potential for soil /dust dermal contact may exist during any future construction activities. Risk associated with these activities can be managed though implementation of a health and safety plan to include vapor and dust monitoring and control measures. YA $licit sity' \awuso a ford,2aa- ii- ii_comiveAGi n Pwn\coR EveAmim Plan (aoso).dm I I I I I I I I 1 I I I I I I I I I I November 11, 2004 Page 7 Soil cleanup levels were developed to reduce the risk for future commercial occupants due to the potential for exposure to hydrocarbon vapors migrating through the building floor from impacted soil below the site. Appropriate soil cleanup goals were selected from the EPA Region 9's Preliminary Remediation Goals. These soil cleanup goals are presented in the table below: Appl>ICatile So><1.Cleanup Levels Future Use as Commercial Retail Development ,-. .i Constituent of Concern Target Concentration (mg /kg) MTBE 36 — California Modified PRG, Cancer Risk (10-6) TBA NA — No vapor inhalation toxicity values available Benzene 1.3 — EPA Region 9 PRG, Cancer Risk (10 -6) Toluene 520 — EPA Region 9 PRG, Soil Saturation Limit Ethyl benzene 20 — EPA Region 9 PRG, Cancer Risk (10-6) Xylenes 420 — EPA Region 9 PRG, Soil Saturation Limit EVALUATION OF ALTERNATIVES Corrective action alternatives were only considered for soil, since groundwater has not been and is not anticiapted to be encountered at the site. The following table presents a list of alternatives for soil that were considered for this site, along with the level oftechnical, economic and regulatory feasibility: Cor>rectwe Action Techu>ICaI . i Econdmic, Alteinabv m "Feas><bilriy Feas><bility $ Regulatory Feas><biI><ty No Action Excellent Excellent Fair Natural Attenuation / Long Excellent Excellent Good Term Monitoring Excavation Poor Poor Good Vapor Extraction Excellent Fair Excellent Y:\_Shdl Siwc \4 \4050 GosfoTd\2004- 11- 11_Com we Aclinn P1nn \C -1ivc AGion Plan (4050).dnc 1 I e November 11, 2004 Page 8 Each alternative was reviewed for technical feasibility based on the technical feasibility of implementing the reviewed action, economic feasibility based on the cost to implement the reviewed action, and the regulatory acceptance of the reviewed action. These components are defined below: Technical Feasibility is based on the ease of implementation, availability of equipment and applicability of the technology to the site - specific parameters. Excellent technical feasibility means that the corrective action is easily implemented, with readily available equipment and applies directly to the constituents to be remediated. A poor feasibility means that equipment is not readily available or the process is difficult or in the experimental stages of development. Economic Feasibility was rated on the basis of excellent, good, fair and poor. Excellent being low in cost and poor being extremely costly for implementation of the action. Regulatory Feasibility is based on past experience of regulatory acceptance of the option reviewed as it applies to the specific parameters of the site. An excellent rating means that it has had a high regulatory acceptance and is currently in use on similar sites. A poor regulatory rating means that the option under review is unlikely to be accepted by regulators and is not currently being utilized on similar sites and is not applicable to the parameters of the site. EVALUATION RESULTS The first option, no action is technically and economically feasible. However, this option has a fair rating from a regulatory standpoint because of the concentrations of TPH -g and MTBE in the soil. The second option, natural attenuation with long term monitoring is technically and economically feasible. This option has an good rating from a regulatory standpoint. It is low in cost, giving it an excellent economic feasibility. The analytical data from the soil samples collected and analyzed during previous soil boring and SVE well installation activities verify the presence of TBA, which is indicative of on -going natural attenuation. In addition, MTBE was indicated at a maximum depth of 85 feet bgs in the analytical data from the previous soil samples collected. Groundwater is reportedly located at an approximate depth of 160 feet bgs, which is approximately 75 feet below the deepest soil sample collected which contains MTBE concentrations. Therefore, it is not likely that MTBE will impact groundwater beneath the site. Because of the excellent technical feasibility, and providing that the monitoring data indicates a decline in constituent concentrations, it is likely that the regulatory issues could be easily resolved, resulting in an excellent regulatory feasibility. The third option, excavation, is feasible from regulatory standpoint but has both technical and economic limitations. Technically, the excavation would need extensive shoring and would be difficult due to the buildings and equipment on -site and the depth of the excavation. This option is also infeasible from an economic standpoint due to the depth of the excavation and the fact that there is a currently operating service station which would need to be shut down during excavation. Y:\_SLdI S- 111Gusfo.1N 1 -I IS-- Anion 1 —Corru 1-Aau. PWn (4050).d K s E November 11, 2004 Page 9 1 The vapor extraction option has excellent technical feasibility based on the results of the SVE pilot test. Results indicated mass removal rates of 53.9 pounds per day (lbs /day) and 37.5 lbs /day of TPH -g and MTBE, respectively. This option has a fair economic feasibility when compared to no action or natural attenuation / long term monitoring. For the same reasons as the technical feasibility, this option has excellent regulatory feasibility. PROPOSED CORRECTIVE ACTION Based on the results of the above evaluation, the most desirable of the options for an effective remedial approach is natural attenuation with long term monitoring. Historical analytical data indicates the presence of TBA, which is likely the result of on -going natural attenuation of MTBE within the vadose zone. Natural attenuation and long term monitoring will allow for on -going assessment of the attenuation process, which will be reported to the CBFD on a quarterly basis. PROGRESS MONITORING AND SAMPLING Sampling and analysis of soil vapors from the five dual- nested SVE wells (VEW -1A & B through VEW -5A & B) will monitor progress of the natural attenuation. The five SVE wells at the site will be initially visited on a monthly basis, for six months, for routine vapor monitoring, and on a quarterly basis thereafter. Wells VEW -IA & B through VEW -5A & B will be sampled to provide an indication of general trends in vapor concentrations. Soil vapor samples for laboratory analysis will be collected based on the schedule described above, for analysis at a California certified laboratory. The vapor sampling will consist of the collection of soil vapor samples in Tedlar bags. The Tedlar bags will be kept in an opaque container until delivered to the laboratory. Samples will be analyzed for TPH -g using EPA Method TO -3, BTEX compounds, MTBE, TBA, DIPE, ETBE, TAME and ethanol using EPA Method TO -] 5, and nitrogen, methane, carbon dioxide, carbon monoxide, and oxygen using ASTM Method D -1946 ( "Fixed Gas Analysis "). PROGRESS REPORTS Quarterly progress reports will be submitted as part of the quarterly update report. This report will include the following items: Tabulated results for vapor analytical data from sampling events CONFIRMATION SAMPLING Once asymptotic reduction of hydrocarbon concentrations has been confirmed, soil confirmation samples will be collected under activities to be proposed in a separate work plan. Implementation of the long term monitoring of natural attenuation will commence as soon as approval is received from the CBFD. v: \_SLdl Silm'WWO511Gus4in(\2IXk -I I -I I_Cavc Amon Plan,Co iv Aam Plan (4050).d. L 1 J November 11, 2004 Page 10 The recommendations contained in this report represent DELTA's professional opinions based upon the currently available information and are arrived at in accordance with currently acceptable professional standards. This report is based upon a specific scope of work requested by the client. The Contract between DELTA and its client outlines the scope of work, and only those tasks specifically authorized by that contract or outlined in this report were performed. This report is intended only for the use of DELTA's Client and anyone else specifically listed on this report. DELTA will not and cannot be liable for unauthorized reliance by any other third party. Other than as contained in this paragraph, DELTA makes no express or implied warranty as to the contents of this report. Should you have any questions or need any further assistance, please contact Mr. Bradley Clark (DELTA) at 626) 256 -6662 or Mr. Anthony Palagyi (SHELL) at (425) 377 -8530. Sincerely, Delta Environmental Consultants, Inc. Peter Shair Project Geologist L Bradley Clark, P.E. C55425 Senior Project Engineer ATTACHMENTS: References Table 1 — Well /Boring /Probe Data Table 2 — Historical Soil Analytical Results Figure 1 — Site Location Map Figure 2 — Site Map with Historical Sampling Locations Appendix A — City of Bakersfield Fire Department Letter dated October 8, 2004 cc: Mr. Anthony Palagyi, Shell Oil Products US Mr. John Whiting, Central Valley - RWQCB IY:l_SWI Site, \4W050 Gocfonl\2004A i- 11_C —wc Action Plon \C—w iv Actinn Plan (4050).doc E p,.z•31•ot} Cr 1 1 1 t REFERENCES Bakersfield Fire Department, 2003, Texaco Service Station, 4050 Gosford Road, Bakersfield, California, February 25, 2003. Delta Environmental Consultants, Inc., 2003, Work Plan for Soil Vapor Extraction Pilot Test, Texaco Service Station, 4050 Gosford Road, Bakersfield, California, November 25, 2003. Delta Environmental Consultants, Inc., 2004, Results of Soil Vapor Extraction Pilot Test, Texaco Service Station, 4050 Gosford Road, Bakersfield, California, February 9, 2004. WGR Southwest, Inc. 2002, Site Assessment Report, Texaco Service Station, 4050 Gosford Road, Bakersfield, California, July 21, 2002. WGR Southwest, Inc. 2003a, Site Assessment and Remediation Test WorAplan, Texaco Service Station, 4050 Gosford Road, Bakersfield, California, January 28, 2003. WGR Southwest, Inc. 2003b, Vapor Extraction Well Installation Report, Texaco Service Station, 4050 Gosford Road, Bakersfield, California, October 27, 2003. 1 1 s v v W 5 cr m i 1 1 1 1 TABLES e Table I Well/Boring/Probe Data 4050 Gosford Road Bakersfield, California fiypa :::: > a.e............ I.. t .. .....A brined .. iii tatte: s ......... roz "' TotePP fbAMS. .....: c .......1......) 1..... fk ...... 011 s_ I.....:.. fC ::::: f .)............ ole "'...... ft :::::tt ly3[eL SY ::::::Soreen f ....: ....:::. I. am......... tf:A1.1S1u ::: (iti: Depth(.................. hup Bi}ttititi::: 1. 1313-1 Boris 1/19/00 40.0 5 5 -40 1313-2 Boris 1/19/00 40.0 5 5 -40 1313-3 Boring 1/19/00 20 5 5 -20 1313-4 Boris 1/19/00 20 5 5 -20 1313-5 Boris 1/19/00 20 5 5 -20 BB -6 Boring 1/19/00 20 5 5 -20 BB -7 Boris 6/21/02 60 5 5 -60 Hollow Stem Auger 1313-8 Boring 6/20/02 60 5 5 -60 Hollow Stein Auger BB -9 Boring 6/20/02 65 5 5 -65 Hollow Stem Auger BB -10 Boris 6/20/02 65 5 5 -65 Hollow Stem Auger BB -11 Boris 6/20/02 60 5 5 -60 Hollow Stem Auger BB -12 Boring 6/20/02 60 5 5 -60 Hollow Stem Auger BB -13 Boring 5/6/03 85 5 5 -85 Hollow Stem Auger BB -14 Boris 5/7/03 85 5 5 -85 Hollow Stem Auger BB -15 Boris 5/7/03 85 5 5 -85 Hollow Stem Auger BB -16 Boring 5/7/03 85 5 5 -85 Hollow Stem Auger BB -17 Boring 5/8/03 85 5 5 -85 Hollow Stein Auger BB -18 Boring 5/8/03 85 5 5 -85 Hollow Stem Auger BB -19 Boring 5/6/03 85 5 5 -85 Hollow Stein Auger BB -20 Boris 5/6/03 85 5 5 -85 Hollow Stem Auger VEW -IA SV Well 9/25/03 55 5 5 -55 2 10 30 Hollow Stem Auger VEW -1B SV Well 9/25/03 55 5 5 -55 2 40 55 Hollow Stem Auger VEW -2A SV Well 9/24/03 60 5 5 -60 2 5 30 Hollow Stem Auger VEW -213 SV Well 9/24/03 60 5 5 -60 2 40 60 Hollow Stem Auger VEW -3A SV Well 9/24/03 50 5 5 -50 2 5 25 Hollow Stem Auger VEW -313 SV Well 9/24/03 50 5 5 -50 2 35 50 Hollow Stem Auger VEW4A SV Well 9/23/03 65 5 5 -65 2 10 30 Hollow Stem Auger VEW413 SV Well 9/23/03 65 5 5 -65 2 40 65 Hollow Stem Auger VEW -5A SV Well 9/23/03 65 5 5 -65 2 5 30 Hollow Stem Auger VEW -513 SV Well 9/23/03 65 5 5 -65 2 40 65 Hollow Stein Auger Notes: AMSL = Above mean sea level Not applicable GWM = Groundwater monitoring N/A = Data not available Data prior to September 2003 supplied by WGR Southwest, Inc. Page 1 of 1 m ® ® ® m m m m ® ® ® m m m m m m ® m r rr rr r rr r r r rr rr rr r rr rr rr rr r r Table 2 Ilistorital Soli Analytical Data 4050 Gosford Road Bakersfield, California i:'.'.' TPH'.G'.'.':.!'CI:H-P.•.'.: iTQTAiF.':'.'BCN> iN.Q' }.':T44VE?4':.'.!ET,NYI}; 7IIPA6; ; MTB6; ii?1Ta$':..'.'.TB,e\;;.;.;.;. DIPS:. ';';'.'EiBN.':':':'.'TA(N$':'i. i:'S4ah4l 5nmpk:':':::':':':::' L8 tq':': i:: XYLE{4 65 8021!':' 8260::':':!':' 8160 :':':': A26D :::':':' b26o:::':':'::8260:':': 1111-1 1/19/00 5 ND( <1.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 1.9 NA NA NA NA NA NA 10 ND(<I.0) 5.60 NA ND(<0.0050) ND(<O.DD50) ND(<0.0050) ND(10.015) 2.3 NA NA NA NA NA NA 15 ND(<1.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 7.8 8.1 NA NA NA NA NA 20 ND(<I.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 1.7 NA NA NA NA NA NA 25 ND(<I.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050), ND(<O.DD50) ND(<0.015) 0.36 NA NA NA NA NA NA 35 ND( <I.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<O.DO50) ND(<0.015) 028 NA NA NA NA NA NA 40 ND <I.0 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<O.OD50) ND(<0.015) 2.8 NA NA NA NA NA NA 1111-2 1/19/00 5 ND(<I.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 0.76 NA NA NA NA NA NA 10 ND(<).0) ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 19 NA NA NA NA NA NA 15 ND(<LO) ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 42 NA NA NA NA NA NA 20 ND(<I.0) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 51 27 NA NA NA NA NA 25 ND(<I.0) II NA ND(<0.0050) ND( <0.0050) ND(<0.0050) ND(<0.015) 6.7 NA NA NA NA NA NA 30 ND( <7.0) ND(<5.0) NA ND(<0.0050) ND(<O.OD50) ND(<0.0050) ND(<0.015) 0.15 NA NA NA NA NA NA 35 ND(<7.0) 7 NA ND(<O.DD50) ND(<O.DO50) ND(<0.0050) ND(<0.015) 10 NA NA NA NA NA NA 40 ND <I.0 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.015) 0.14 NA. NA NA NA NA NA PlplagSample P -2 -4 7/5/01 ND(<0.5) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<O.DO50) ND( <0.010) NA 0.2 3.8 ND(10.010) ND(<0.010) ND(<O.070) NA P -2 -8 7/5/01 4.3 ND(<5.0) NA ND(<0.0050) ND( <0.0050) ND(<0.0050) ND(<0.010) NA 8.2 ND(<6.3)" ND(<0.010) ND( <0.010) ND(<0.010) NA P -2 -lo 715101 2.6 31 NA ND(<0.0050) 0.055 0.024 0.223 NA 2.7 4.5 ND(<0.010) NU(<0.0I0) ND(<O.OIO) NA P -3-4 7/5101 ND(<0.5) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.02 ND(<0.25) ND(<0.010) ND(<0.010) ND(<0.010) NA P -3 -8 7/5/01 ND <0.5 ND <5.0 NA ND(<0.0050) ND(<0.0050) ND(<0.0050) N <0.010 NA 0.017 N <0.25 ND(<0.010) ND(<0.010) ND(<0.010) NA G"r- Excavation Sam la P -2 -20 7/17/01 4.3 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) 6.3 10 NA NA NA NA NA P- 2 -WS20 7/17/01 7.9 ND <5.0 NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) 10 16 NA NA NA NA NA BB-9 6121002 5 0.310 2.100 NA ND( <0.0050) ND( <0.0050) ND(<0.0050) ND(<0.0050) NA 0.023 NP NP NP NP NA 10 8.500 ND(<2) NA ND(<0.0250) ND(<0.0250) ND(<0.0250) ND( <0.0250) NA 7.300 NP NP NP NP NA 15 5.600 ND(<2) NA ND(<0.0050) ND(<0.0050) ND( <0.0050) ND(<0.0050) NA 11.000 NP NP NP NP NA 20 15.000 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 16.000 NP NP NP NP NA 25 0.890 4.600 NA ND(<0.0050) ND(<O.0050) ND(<O.DD50) ND(<0.0050) NA 0.730 NP NP NP NP NA 30 0.330 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.099 NP NP NP NP NA 35 0.360 2.000 NA ND(<0.0050) ND(<0.0030) ND(<0.0050) ND(<O.DO50) NA 0.015 NP NP NP NP NA 40 ND(10.05) ND(<2) NA ND(<0.0050) ND( <0.0050) ND(<0.0050) ND(<0.0050) NA ND(<O.OD50) NP NP NP NP NA 45 0.660 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<O.DO50) ND(<0.OD50) NA 1.400 NP NP NP NP NA 50 ND(<0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<O.OD50) ND(<0.0050) NA 0.045 NP NP NP NP NA 55 ND(<0.05) ND(Q) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.046 NP NP NP NP NA 60 ND(<0.05) ND(<2) NA ND(<O.DO50) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.005 NP NP NP NP NA 65 ND(<0.05) ND(<2) NA ND(<0.0050) ND(<O.DO50) ND(<0.0050) ND(<0.0050) NA 0.053 NP NP NP NP NA BB -11 6/20102 5 0.400 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 1.000 NP NP NP NP NA 10 1.700 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<O.DO50) ND(<O.DO50) NA 3.000 NP NP NP NP NA 15 9.500 ND(<2) NA ND(<0.0050) ND(<O.OD50) ND(<0.0050) ND(<0.MSI)) NA 5.200 NP NP NP NP NA 20 5.100 ND( <2) NA ND(<0.0050) ND( <D.OD50) ND(<0.0050) ND(<0.0050) NA 11.000 NP NP NP NP NA 25 3.300 ND(<2) NA ND(<O.DO50) ND(<0.0050) ND(<0.0050) ND(<O.DO50) NA 0.650 NP NP NP NP NA 30 1.400 ND(<2) NA ND(<0.0050) ND(10.0050) ND(<0.0050) ND(<O.0050) NA 0.140 NP NP NP NP NA 35 ND(10.05) ND(<2) NA ND(<0.0050) ND(<O.DO50) ND(<0.0050) ND( <0.0050) NA 0.008 NP NP NP NP NA 40 0.180 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.011 NP NP NP NP NA 45 0.130 ND(<2) NA ND(<O.DD50) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.010 NP NP NP NP NA 50 ND( <0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<O.DO50) ND(<0.0050) NA 0.020 NP NP NP NP NA 55 ND( <0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.023 NP NP NP NP NA 60 0.180 ND(<2) NA ND <D.D050 ND(<0.0050) ND(<0.0050) N <O.DO50 NA ND(<0.0050) NP NP NP NP NA Tabk 2 SoilSwpiml Dab Pose 1 of4 m m m®® m m m®® m m m m® m m m m Table 2 Historical Soil Analytical Data 4050 Gosford Road Bakersneld, California 2.b. 2 sou S -plle( D Pt. 2 of ,l rry;G ; rPry -p; QTA4': sFay eA6';'.';'T4tI16a?$':' EJ jYU;•.'.':'7WA6.'.':':.lTTF,::':':• 01TBQ.:' ' TEl '.. ' 5niopk::'::':':':':':':'::' t, lidtl...:.,•:•:':':.:.:.:•:.: EIV2BNBis kY66N£5'is 8021 :':'::..: 8260:'::':' ii826b:'::': 82G0':'::':':'D260:':':':':' 8260:':':':':':':':':':•.•:': m m a m BIM2 620/02 5 ND(<0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA ND(<0.0050) NP NP NP NP NA 10 ND(<0.05) ND( <2) NA ND(<0.0050) ND( ,0.0050) ND(<0.0050) ND(<0.0050) NA 0.010 NP NP NP NP NA 15 ND(<0.05) ND(<2) NA ND(<0.0050) ND( <0.0050) ND(<0.0050) ND( @0050) NA 0.022 NP NP NP NP NA 20 ND(<0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<O.00SO) ND(<0.0050) NA ND(<0.0050) NP NP NP NP NA 25 2.900 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<O.0050) NA 0.510 NP NP NP NP NA 30 ND(<0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.006 NP NP NP NP NA 35 0.240 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.032 NP NP NP NP NA 411 12.000 ND(<2) NA ND(<0.0050) ND(<0.0050) NIX <0.0050) ND( <0.0050) NA 1.300 NP NP NP NP NA 45 0.860 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.850 NP NP NP NP NA 50 0.150 ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.300 NP NP NP NP NA 55 ND(,0.05) ND(<2) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.0050) NA 0.033 NP NP NP NP NA 60 0.081 ND(<2) NA ND(<0.0050) ND <O.0050 ND(<0.0050) ND(<0.0050) NA 0.120 NP NP NP NP NA 80-15 5/7/03 5 ND(<0.50) NA NA ND(<O.00SO) ND( ,0.0030) ND(<0.0050) ND(c0.010) NA 0.440 0.740 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 10 1.5 NA NA ND(<O.0050) ND(<0.0050) ND(<O.0050) ND(<0.010) NA 4.400 7.000 ND(<0.010) ND( <0.010) ND(<0.010) ND(<0.250) 15 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<O.DO50) ND(<0.010) NA 3.300 1.900 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 20 ND(<0.50) NA NA ND(<0.130) ND(<0.130) ND(<0.130) ND(<0.260) NA 6.400 2.700 ND(<0.250) ND(<0.250) ND(<0.250) ND( <6.300) 25 ND(<O50) NA NA ND(<O.130) ND(<0.130) ND(<0.130) ND(<0.260) NA 39.000 4.800 ND(<0.250) ND(<0.250) ND( <0250) 12.000 30 ND(,0.50) NA NA ND(<0.0050) ND(10.0050) ND(<0.0050) ND(<0.010) NA 0.460 0.650 ND(<0.010) ND(<0.010) ND(<0.010) 1ND(<0250) 35 ND( <0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<O.0050) ND(<0.010) NA 0.140 0210 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 40 ND(<0.50) NA NA ND(<0.130) ND(<0.130) ND(<0.130) ND(<0.260) NA 0.870 2.200 ND(<0.250) ND(<0.250) ND(<0.250) ND(<6.300) 45 ND(<0.50) NA NA ND(<0.0050) ND(<O.0050) ND(<0.0050) ND(<0.010) NA 0.063 1.000 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 50 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.460 ND( <0.050) ND(<0.010) ND( ,0.010) ND(<0.010) ND(<0.250) 55 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.051 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0250) 60 ND(<0.50) NA NA ND( <0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.028 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 65 ND( <0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.026 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0250) 70 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(41.010) NA 0.011 ND(<0.050) ND(<0.010) ND(,0.010) ND(<0.010) ND(<0.250) 75 ND(c0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.007 ND(<0.050) ND( <0.010) ND(<0.010) ND(<0.010) ND(<0.250) 80 ND(<0.50) NA NA ND(<O.0050) ND(<0.0050) ND(<O.0050) ND(<0.010) NA 0.011 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 85 ND(<0.50) NA NA ND(<0.0050) ND ,0.0050 ND(<0.0050) ND(<0.010) NA 0.061 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) BB-16 5/7/03 5 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.0056 0.150 - ND( <0.010) ND(<0.010) ND(<0.010) ND(<0.010) 10 ND(<0.50) NA NA ND(<O. 130) ND(<0.130) ND(<0.130) ND(<0.260) NA 10.000 ND(<1.300) ND(<0.250) ND(<0.250) ND(<0.250) ND(<6.300) 15 ND(<0.50) NA NA ND(<O.130) ND( <O.130) ND(<0.130) ND(<0.260) NA 16.000 2.300 ND(<0.250) ND(<0.250) ND(<0.250) ND(<6.300) 20 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 8.700 13.000 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.010) 25 ND(<0.50) NA NA ND( <0.130) ND(<0.130) ND(<O.130) ND(<0.260) NA 40.000 6.400 ND( <0.250) ND(<0.250) ND(<0.250) ND( <6.300) 30 ND( <0.50) NA NA ND(<O.0050) ND(<0.0050) ND( <O.DO50) ND(<0.010) NA 0.420 1.700 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0250) 35 ND(<0.50) NA NA ND( <O.0050) ND(10.0050) ND(<0.0050) ND(<0.010) NA 0.260 1.600 ND(<0.010) ND(<0.0)0) ND(<0.010) ND(10250) 40 ND(<0.50) NA NA ND(<0.130) ND(<O.130) ND(<0.130) ND(<0.260) NA 23.000 1.400 ND(<0.250) ND(<0.250) ND(<0.250) ND( ,6.300) 45 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.450 0.180 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 50 ND(<0.50) NA NA ND(<0.0050) ND( ,0.0050) ND(<0.0050) ND(<0.010) NA 0.026 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 55 ND(<0.50) NA NA ND(<0.0050) ND(,0.0050) ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND( <0.010) ND(<0.010) ND(<0.250) 60 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 65 ND(<0.50) NA NA ND(<O.0050) ND(<0.0050) ND(<O.0D50) ND(<0.010) NA ND( <0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0250) 70 ND(<0.50) NA NA ND(<O.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 75 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(10.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND( <0.010) ND(<0.250) 80 ND(,0.50) NA NA ND(<O.MO) ND(<0.0050) ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 85 N ,0.50 NA NA ND ,0.0050 N ,-0.0050 ND(<0.0050) ND ,0.010 NA 0.018 ND(<0.050) ND(<0.010) ND ,0.010 ND(<0.010) ND(<0.250) 2.b. 2 sou S -plle( D Pt. 2 of ,l m® ® m m m® ® m m m m® ® m m m m s Table 2 Historical Soil Analytical Data 4050 Gosford Road Bakersfield, California TPit'G ::'::: TRH- A:! <'::TQTA2r: BF iT4W?E. m;113aU; ;.;.;.;IUTAL; M1TFB;.;.;.;. T1TBF,.;.:.;.;.;7;BK DIPS•.' i.':': LR' BE:':' :':': TAMQ':':':::'18WaIW1:':'. 5ninple::':::! tHdD'`}::::':'::'::'::::'::':':':' BHN2EN@::':'RYLEfitE5'::':: 8021 :::':':':8260::•::':: B26D ?:':':•:': 9260 :::::':'b260 8260:':::': Depth ... Date'.'.'.'.' m m m m m m m m m R m m m k BB-17 5/&03 5 ND(<0.50) NA NA ND(<O.0050) ND(<0.0050) ND(<0.0050) ND( ,0.010) NA ND(<0.0050) ND(<0.0050) ND(<0.010) ND(<0.010) ND(<0.010) ND(c0.250) 10 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND( -0.0050) ND(<0.010) NA 0.270 0.370 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 15 0.88 NA NA ND(<0.130) ND(<0.130) ND(<0.130) ND(,0.260) NA LBDO ND(<1.300) ND(<0.250) ND(<0.250) ND(<0.250) ND(<6.300) 20 ND(<0.30) NA NA ND(<0.130) ND(<0.130) ND(<0.130) ND( -0.260) NA 1.700 ND(<1.300) ND(<0.250) ND(<0.250) ND(<0.250) ND(<6.300) 25 2.4 NA NA ND(<O.DO50) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 6.700 4.400 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 30 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.800 1.200 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 35 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND( <0.0050) ND(<0.010) NA 0.350 0.470 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 40 5.2 NA NA ND(<0.250) ND(<0.250) ND(<0.250) ND(<0.500) NA 23.000 ND(<2.500) ND(<0.500) ND(<0.500) ND(<0.5DO) ND(<13.ODO) 45 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<O.OD50) ND(10.010) NA 0.660 0.130 ND(<0.010) ND(<0.010) ND(<0.010) ND( <0.250) 50 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.900 0.077 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 55 ND(<0.50) NA NA ND(<0.0050) ND(<0.0030) ND(<0.0050) ND( -0.010) NA 0.220 ND(<0.050) ND( -0.010) ND(<0.010) ND(<0.010) ND(<0.250) 60 ND(<0.50) NA NA ND(<O.DO50) ND(<0.0050) ND(<O.OD50) ND(<0.010) NA 0.013 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(10.250) 65 ND( <0.50) NA NA ND(<O.DO50) ND(<0.0050) ND(<O.OD50) ND(10.010) NA 0.020 ND(<0.030) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 70 ND(<0.50) NA NA ND(<O.DO50) ND(<0.0050) ND(<0.0050) ND(10.010) NA 0.011 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 75 ND(<0.50) NA NA ND(<O.DO50) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.021 ND(<0.050) ND(<0.010) ND( ,0.010) ND(<0.010) ND(<0.250) 80 ND(<0.50) NA NA ND( <0.0050) ND(<0.0050) ND(<O.D050) ND(<0.010) NA 0.023 ND(<0.050) ND(<0.010) ND(<0.010) ND( -0.010) ND(<0.250) 85 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) N -0.0050 ND -0.010 NA 0.011 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) BB -18 5/8/03 5 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(-0.010) NA 0.820 1.600 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.010) 10 3.6 NA NA ND(<0.250) ND(<0.250) ND(<0.250) ND(10.500) NA 42.000 16.000 ND( <0.500) ND( <0.500) ND(<0.500) ND(<13.ODO) 15 1.3 NA NA ND(<0.250) ND(<0.250) ND( <0.250) ND( -0.500) NA 47.000 12.000 ND(<0.500) ND(<0.500) ND(<0.500) ND(113.000) 20 0.63 NA NA ND(<0.250) ND(<0.250) ND(<0.250) ND(- 0.500) NA 18.000 4.900 ND(<0.500) ND(10.300) ND(<0.500) ND(<13.000) 25 0.73 NA NA ND(<0.130) ND(<O.130) ND(<0.130) ND( 10.260) NA 14.000 5.600 ND(<0.250) ND( <0.250) ND(<0.250) ND(<6.300) 30 ND(<0.50) NA NA ND(<0.130) ND( <O.130) ND(<0.130) ND(10.260) NA 5.600 3.600 ND(<0.250) ND(<0.250) ND( <0.250) ND(<6.300) 35 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.590 035" ND( ,0.010) ND(<0.010) ND( 10.010) ND(<0.250) 40 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(10.260) NA 2.300 ND( <IJ00) ND(<0.750) ND(<0.250) ND(<0.250) ND(<6.300) 45 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(- 0.010) NA 0.180 1.900 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) SO 1.1 NA NA ND(<0.130) ND(<0.130) ND(<0.130) ND(- 0.260) NA 3.700 ND(<1.300) ND( <0.250) ND( <0.250) ND(<0.250) ND(<6.300) 55 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(,0.010) NA 0.030 0.097 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 60 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(10.010) NA 0.005 0.100 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 65 ND( <0.50) NA NA ND(<0.0050) 6.6 ND(<0.0050) ND( -0,010) NA 0.540 0.340 ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) 70 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(- 0.010) NA 0.005 ND(<0.050) ND( -0.010) ND(<0.010) ND(<0.010) ND(<0.250) 75 ND(<0.50) NA NA ND(<0.0050) ND( -0.0030) ND(<0.0050) ND( -0.010) NA 0.012 ND(10.050) ND( -0.010) ND(<0.010) ND(<0.010) ND(<0.250) 80 ND(<0.50) NA NA ND(<O.0050) ND(<0.0050) ND(<O.OD50) ND(- 0.010) NA 0.009 ND( <0.050) ND(<0.010) ND(<0.0)0) ND(<0.010) ND(<0.250) 85 ND(<0.50) NA NA ND(<0.0050) ND(<0.0050) ND(<0.0050) N -0.010 NA 0.0095 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) ND(<0.250) VEW -2 9/24/03 5 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND( -0.0050) ND(-O.OiO) NA 0.063 0.560 ND( -0.010) ND( -0.010) ND(<0.010) NA 10 4.30 ND(<5.0) NA ND(<O.DO50) ND(<O.DO50) ND(<0.0050) ND( <0.010) NA 18.000 4.500 ND(<0.010) ND( ,0.010) ND(<0.010) NA 15 6.00 ND(<5.0) NA ND(<0.130) ND(<0.130) ND(<0.130) ND(-0.260) NA 12.000 2.200 ND(<0.250) ND(<0.250) ND(<0.250) NA 20 1.60 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(-0.010) NA 6.500 3.500 ND(<0.010) ND(<0.010) ND( -0.010) NA 25 7.60 ND(<3.0) NA ND(<O.130) ND(<0.130) ND(<O.130) ND(10.260) NA 44.000 4.800 ND( -0250) ND(<0.250) ND(<0.250) NA 30 0.62 ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<O.D050) ND( -0.010) NA 1.800 1200 ND( ,0.010) ND( <0.010) ND(<0.010) NA 35 0.66 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(10.010) NA 1.200 0.940 ND(<0.010) ND(<0.010) ND(<0.010) NA 40 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(10.010) NA 0.410 0570 ND(,0.010) ND(<0.010) ND(<0.010) NA 45 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(- 0.010) NA 0.330 0.530 ND(<0.010) ND(<0.010) ND(<0.010) NA 50 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND( 10.010) NA 0.960 0.077 ND(<0.010) ND(<0.010) ND(<0.010) NA 55 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.006 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) NA 60 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND -0.010 NA N 10.0050 ND 10.050 ND(<0.010) ND(<0.010) ND(<0.010) NA VEW -3 9/24/03 5 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(10.010) NA ND( ,0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) NA 10 1.9 ND(<5.0) NA ND( <O.DO50) ND( ,0.0050) ND( -0.0050) ND(- 0.010) NA 6.800 0.150 ND(<0.010) ND(<0.010) ND(<0.010) NA 15 5.7 ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(- 0.010) NA 19.000 4.100 ND( -0.010) ND( <0.010) ND( <0.010) NA 20 6.2 ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND( -0.0050) ND(- 0.010) NA 14.000 4.400 ND(<0.010) ND(<0.010) ND(<0.010) NA 25 9.6 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(- 0.010) NA 24.000 1LD00 ND(<0.010) ND( <0.010) ND(<0.010) NA 30 1.1 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND( -0.0050) ND(<0.010) NA 3.500 4.200 ND(<0.010) ND(<0.010) ND(<0,010) NA 35 6.7 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(- 0.010) NA 0.810 1.600 ND(<0.010) ND(<0.010) ND(<0.010) NA 40 4.9 ND(<5.0) NA ND(<0.0050) ND(<O.DO50) ND(<0.0050) ND(a0.010) NA 29.000 2.100 ND(<0.010) ND(<0.010) ND(<0.010) NA 45 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(<O.DO50) ND( -0.0050) ND( <0.010) NA 0.350 0.330 ND( -0.010) ND( -0.010) ND(<0.010) NA 50 N <0.50 N <5.0 NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND ,0.010 NA 0.020 N <0.0SD ND(<0.010) ND(<0.010) ND(<0.010) NA Tlbk 2 SoilSmpbe6 D 11 Pne3of4 m ® ® ® ® ® m ® m m m m m m m m m m fable 2 Historical Soil Analytical Data 4050 Gostord Road Bakersfield, California Not= NO - Not Detected NA - Not Analyzed NP - Not Provided V - Composite Sample TPH -G - Total pehokum hydrocarbom m gasoline TPH -D - Total petroleum hydmcarbom u diesel MTBE - Methyl -tort butyl ether TBA - TM -butyl alcohol DIPE - Di- isopropyl ether ETBE - Ethyl -tort butyl ether TAME - Tert -amyl methyl ethK MRL is clavatcd bemuse of mahia intafer m and because the sample required diluting Tabk 2 Soil S=pl4 Dale Pye 4 or4 tFH c. TQTA4:':':'BF$p$':':•iT44V$t?$'::'i:$t:tlYt 1??TA4:::':!MT MT$$ :.:'i:TH'::::: UIPX'i::':' EIBH:':':':':'TArty 5ninple:::':':':'::':'::'::':': t£ dl):':':-::-::':::'::::::':' 13s197.LNE:'::AYLP, PS :'i:':'AOYI e2do :•:':':':':'A26O:':::'::d26U B26oi : <':' g26o::::::•:•:::::: m m m m m b k VBW4 923103 5 ND(<0.50) ND(<5.0) NA ND(<0.0050) ND(10.0050) ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<O.0050) ND(<0.010) ND(<0.010) ND(<0.010) NA ID 1.2 ND(<5.0) NA ND(10.130) ND(<0.130) ND(10. 130) ND(<1.260) NA 3.500 ND(<1.300) ND(<0.250) ND(<0150) ND(<0.250) NA 15 1.3 ND(<5.0) NA ND(<O.130) ND(<0.130) ND(<0A30) ND( <0.260) NA 20.000 2.100 ND(<0.250) ND(<0.250) ND(<0.250) NA 20 1.5 ND(<5.0) NA ND( <0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 1.400 3.800 ND(<0.010) ND(<0.010) ND(<0.010) NA 25 7.4 ND(<5.0) NA ND(<0.0050) ND( <0.0050) ND(<0.0050) ND(<0.010) NA 3.500 2.100 ND(<0.010) ND(<0.010) ND(<0.010) NA 30 1.1 ND(<5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 22.000 2.700 ND(<0.010) ND(<0.010) ND(<0.010) NA 35 0.8 ND( <5.0) NA ND(<0.0050) ND(10.0050) ND(<0.0050) ND(<0.010) NA 0.610 1.500 ND(<0.010) ND(<0.010) ND(<0.010) NA 40 7.4 ND( <5.0) NA ND(<0.130) ND( <0.130) ND(<0.130) ND(<0.260) NA 1.600 ND( <1.300) ND(<0.250) ND(<0.250) ND(<0.250) NA 45 3.70 ND( <5.0) NA ND(<0.130) ND(<0.130) ND(10. 130) ND(<0.260) NA 17.000 ND(<I.300) ND(<0250) ND(<0.250) ND(<0.250) NA 50 ND(<0.50) ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND( <0.010) NA 0.650 0.120 ND(<0.010) ND(<0.010) ND(<0.010) NA 55 ND(<0.50) ND(<5.0) NA ND( <0.0050) ND( <0.0050) ND(<0.0050) ND( <0.010) NA 0.016 ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) NA 60 ND(<0.30) ND(<5.0) NA ND( <0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.023 ND(<0.050) ND( <0.010) ND(<0.010) ND(<0.010) NA 65 ND(<0.50) ND <3.0 NA ND(<0.0050) ND <O.DO50 ND(<0.0050) ND(<0.010) NA 0.005 ND <O.050 ND(<0.010) ND(<0.010) ND(<0.010) NA VEW -5 923/D3 5 ND(<0.50) ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.140 4.000 ND(<0.010) ND( <0.010) ND(<0.010) NA 10 6.3 ND(<5.0) NA ND(<0.130) ND(<0.130) ND(<0.0050) ND(10.260) NA 2.400 8.500 ND(<0250) ND(<0.250) ND(<0.250) NA 15 8.7 ND(<5.0) NA ND(<0.130) ND(<0.130) ND(10.130) ND( <0.260) NA 29.000 21.000 ND(<0.250) ND(<0250) ND(<0.2.50) NA 20 13 ND( <5.0) NA ND(<0.130) ND(<0.130) l ND(10.130) ND(<0.260) NA 46.000 15.000 ND(<0.250) ND(<0.250) ND(<0.250) NA 25 28 ND( <5.0) NA ND(<0.130) ND(<0.130) ND(<0.130) ND(<0.260) NA 85.000 29.000 ND(<0.250) ND(<0.250) ND(<0.250) NA 30 1.5 ND( <5.0) NA ND(<O.130) ND(<0.130) ND(<0.130) ND(<0.260) NA 3.100 3.200 ND(<0150) ND(<0.250) ND(<0.250) NA 35 1.9 ND(<5.0) NA ND(<0.130) ND(<0.130) ND(<0.)30) ND( <0.260) NA 5.300 1.800 ND(10.230) ND(<0250) ND(<0.250) NA 40 0.94 ND(<5.0) NA ND(<O.0050) ND(<0.0050) ND(10.0050) ND( <0.010) NA 0.680 2.400 ND(<0.010) ND(<0.010) ND(<0.010) NA 45 2.0 ND( <5.0) NA ND(<O.130) ND(<0.130) ND(10.130) ND(<0.260) NA 4.400 4.200 ND(<0.250) ND(<0.250) ND(<0250) NA 50 ND(<0.50) ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA 0.530 ND(<0.050) ND(<0.010) ND(<0.010) ND( <0.010) NA 55 ND( <0.50) ND( <5.0) NA ND(<0.0050) ND(<0.0050) ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) NA 60 ND(<0.50) ND( <5.0) NA ND(<0.0030) ND(<0.0030)' ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) ND(<0.010) NA 65 ND <0.50 ND(<5.0) NA ND(<0.0050) N <0.0050 ND(<0.0050) ND(<0.010) NA ND(<0.0050) ND(<0.050) ND(<0.010) ND(<0.010) N <0.010 NA Not= NO - Not Detected NA - Not Analyzed NP - Not Provided V - Composite Sample TPH -G - Total pehokum hydrocarbom m gasoline TPH -D - Total petroleum hydmcarbom u diesel MTBE - Methyl -tort butyl ether TBA - TM -butyl alcohol DIPE - Di- isopropyl ether ETBE - Ethyl -tort butyl ether TAME - Tert -amyl methyl ethK MRL is clavatcd bemuse of mahia intafer m and because the sample required diluting Tabk 2 Soil S=pl4 Dale Pye 4 or4 e = = m ® ® ® = = m m ® = = m 1 1 FIGURES 1 e fr V O LCD O Q d C7 0 Z Wm Q g w0 rm w 0 Q_` CLCLQ rm wY UW SU o m $ 1 d' DJ TOPQ9 map pr'ined on 11120103 F orn `CoB vrr .tp," ar}d `"UnMeu.-,:py" 1 N CALIF. SITE PTLrGIfbbl?r ©1 IaII1:J1Or CIt'tapkC ir0{fiIIVS {WMt4'.ppOtLh1} L bOO V0 M z 0 0Ne M s nn lnDELTA SHELL OIL PRODUCTS US ENVIRONMENTAL SHELL SERVICE STATIONnlkCONSULTINGINC. BAKERSFIELD, CALIFORNIA FIGURE 1 SITE LOCATION MAP 4050 GASFORD ROAD BAKERSFIELD, CALIFORNIA I J 1 1 1 e IU000 aa I I I a I I I CANOPY I ( ¢BB -6 ¢B -5 P -4BB -20• I 0! I D -3 I B -10 I I I VEW -5A VEW -5B O VEW -4B VEW -4AQCARIP -3 O WASH I STATION I 'B, 1 PLANTER BUILDING BB -9 BB: 1 BBJ2 B f I P -2 -4 I P- 2- W5100 P -2 -8 P -2 -10 i P -1- WS10 I . r P -2 -20 U) I BB-71t,, I D- 1 -NS10 IVEW -2A VEW I UST (TYP) VEW -3AC) I BB -13 • BB_1¢ L -- -- r1 BB -11 i' • D- 1 -WS10 ¢ BB -3¢ BB -16 I BB -4 — VEW -3BBB -8 I l\ I VEW -1A BB -14 P- 1 -ES18 PLANTER VEW -18 ISLAND TV) WHITE LANE LShell Sltes \4 \4050 Gosford\ 2004- 11- I1_CorrectNe Mon Plan\FIGURE 2(4050)_SF E WITH HISTORICALSAMPLING LOCATIONS NAP.dwg, Model, 11/1012004 8:51:06AM N W O E S LEGEND VEW -1A ® DUAL NESTED VAPOR WELL LOCATION AN DESIGNATION BB -7 HISTORICAL SOIL BORING LOCATION WGR SOUTHWEST INC. 06/20/02- 06/21/02) BB -1 ¢ HISTORICAL SOIL BORING LOCATION PACIFIC ENVIRONMENTAL GROUP 01/19/00) D -1 O HISTORICAL SOIL SAMPLING LOCATION IT CORPORATION 07/05/01 & 07/17/01) BB -13 • SOIL BORING LOCATION AND DESIGNATION WGR SOUTHWEST INC.) 0 30 60 SCALE IN FEET Delta 11ENVIRONMENTALACONSULTANTSINC. SHELL OIL PRODUCTS US SHELL SERVICE STATION BAKERSFIELD, CALIFORNIA FIGURE 2 SITE MAP WITH HISTORICAL SAMPLING LOCATIONS 4050 GOSFORD ROAD BAKERSFIELD, CALIFORNIA m = = m m ® ® = = m = m m ® ® = m 1 1 11 t APPENDIX A CITY OF BAKERSFIELD FIRE DEPARTMENT LETTER DATED OCTOBER 8, 2004 1 1 C I J October 8, 2004 i— fERSFIDE ' FIRE Mr. Tony Palagyi OCT 1 5 2004 1ARTMTShellOilProductsUS P.O. Box 7869 y. Burbank, CA 91510 -7869 RE: Results of Soil Vapor Extraction Tests of the property located at: 4050 Gosford Road in Bakersfield, CA Dear Mr. Palagyi: FIRE CHIEF r J,l - Kr...0 This office has reviewed the Soil Vapor Extraction Pilot Test reports ADMINISTRATIVE SERVICES submitted by you for the property located at the above stated address. 2101 °H" street Laboratory results reveal that methyl tertiary butyl ether (MTBE) is present inBakersfield, CA 93301 VOICE (661) 326 -3941 the soil at levels exceeding limits allowable by state guidelines. FAX (6611852-2170 You are hereby notified that mitigation of the MTBE contamination to SUPPRESSION SERVICES 2101 "H" Street acceptable levels is required b this office. P q Y Bakersfield, CA 93301 VOICE (661) 326 -3941 FAX (661) 852 -2170 This office accepts the soil vapor extraction option, listed in the site characterization studies, as the most practical method for accomplishing a PREVENTION SERVICES reduction in the MTBE levels detected at the site. However, if you or your IRESA MSERVICES" ENVRRONMENTAISERVICES 900 Truxtun Ave., Suite 210 consultant has an alternate method you wish to employ, you may submit a Bakersfield, CA 93301 request to this office for review and approval. q PP32VOICE (bbl) 326 -3979 FAX (661) 852 -2171 respond within twenty (20) working days from receipt of thisPlease FIRE INVESTIGATION letter as to your intentions regarding this matter and a time table for carrying1715ChesterAve. Bakersfield, CA 93301 them out. VOICE 1661, 326-3951 FAX (661) 852 -2172 If you have any questions, please call me at (661) 326 -3649. TRAINING DIVISION 5642 Victor Ave. ' Bakersfield, CA 93308 Sincerely VOICE (661) 399 -4697 FAX (661) 399 -5763 Howard H. Wines, III Hazardous Materials Specialist Registered Geologist No, 7239 Office of Environmental Services Cc: B. Clark, Delta Env. J. Whiting, CV -RWQCB fJ s 1 it 1