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4050 GOSFORD ROAD (3)
DEL %A a--. ,: Inogen' Alliance SUSTAINABLE STRATEGIES FOR GLOBAL LEADERS October 12, 2010 DELTA Project No. SCA4050GID SAP No. 121224 City of Bakersfield Fire Department Environmental Services 2101 H Street Bakersfield, California 93301 Attention: Mr. Craig Perkins Re: Addendum to Vapor Workplan for Well Abandonment Shell Branded Service Station 4050 Gosford Road Bakersfield, California Dear Mr. Perkins: On behalf of Equilon Enterprises LLC dba Shell Oil Products US (SHELL), Delta Consultants (DELTA) submits this Addendum to Workplan for Well Abandonment for the above - referenced site (Figure 1). This document was prepared in response to a City of Bakersfield Fire Department (CBFD) e-mail request dated October 7, 2010 (Appendix A) to document an intended change to DELTA's Response to Agency Letter and Workplan for Vapor Well Abandonment dated July 1, 2010 (Appendix B). The CBFD approved the Workplan for Vapor Well Abandonment in a letter dated July 7, 2010 and granted case closure and authorization to proceed with the vapor well abandonments in a letter dated September 17, 2010 (Appendix A). In an e -mail dated October 7, 2010 (Appendix A), Mr. Craig Perkins CBFD) approved the abandonment of dual nested vapor well VEW -4 by pressure grout, rather than over -drill due to the presence of a steel storage container in close proximity to the vapor, prohibiting the use of a hollow -stem auger drill rig to over -drill the well. This workplan addendum has been prepared to comply with the California Code of Regulations, Title 23, Division 3, Chapter 16, Article 11. The following is a detailed scope of work for the abandonment of vapor well VEW -4 by pressure grout. All work will be performed under the supervision of a California- professional geologist and /or professional civil engineer. 911 SOUTH PRIMROSE AVENUE SUITE K' MONROVIA, CALIFORNIA 91016 USA PHONE +1 626.256.6662 / USA TOLL FREE 800.477.7411 FAX +1 626.256.6263 WWW.DELTAENV.COM City of Bakersfield Fire Department Addendum to Workplan for Vapor Well Abandonment October 12, 2010 Page 2 SITE DESCRIPTION The subject site is currently an active Shell branded 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 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). PROPOSED CHANGE TO SCOPE OF WORK Due to the presence of a steel storage container located in close proximity to dual nested vapor well VEW -4 Figure 2), DELTA proposes to abandon this vapor well by pressure grout, rather than over - drill. The well will be cleared by air -knife to a depth of approximately five feet below ground surface. A cement grout (5% bentonite) will be placed in each ofthe well casings through a tremie pipe. A pressure cap will subsequently be placed on top of the each well casing, and grout will be forced into the casing under pressure. Pressure will be applied to the vapor well long enough for the cement grout to set. The top five feet of casing will be removed using hand tools, and backfilled to the surface using cement grout. If you have any questions regarding this site, please contact Mr. Philip L. Gilchrist (DELTA) at (626) 873 -2730, Ms. Monica Ortega (DELTA) at (626) 873 -2728, or the SHELL Project Manager, Ms. Andrea Wing at (714) 731 -1050. Sincerely, Delta Consultants Philip L. Gilchrist, R.E.A. C CALIFO\P Project Manager Registered Environmental Assessor cc: Ms. Andrea Wing, Shell Oil Products US Heng and Sing Chao, Property Owners J4_4 Scott Pearson, P.G. 6931 Professional Geologist L SC,OTT N. PEARSON No. 6931 0 EXp, 513112012 `) CA4 kt - City of Bakersfield Fire Department Response to Agency Letter Dated July 19, 2010 August 6, 2010 Page 3 Attachments: Figures Figure 1— Site Location Map Figure 2 — Site Map Appendices Appendix A — City of Bakersfield Fire Department Letters dated July 7, 2010 and September 17, 2010; and City of Bakersfield Fire Department E -mail Correspondence dated October 7, 2010 Appendix B — Delta Consultants Response to Agency and Workplan for Vapor Well Abandonment dated July 1, 2010 FIGURES ilk rv'_ ...11 J1'. If t} ` • '`! f1'i _ e —_._ — r •r•7% '') '+•,, ^'s' ' 1111 17-0 11 a !•, dr , x..S'r"`/ :a 1.. Ei!Sl '.•.'TilI ''"-- l.l. 1_ I If -•I 1 111•Ilt ld 111 .19111I6'IIIiC i 1 j '".•, ' ;'s: l 1) , I iLO • /' :• I ,. ' . I 1 i - III i+ir" rl•. +i1, _ Itf 'oil . Eim 'II'lllJ Up'sFd ow =\ 0 -Kim ICA14 I IRYiI.IR.If IRA.. ® ` . _ ,`„ a _I IIh • .,'..ti i' / (,• ' 111 `I / 1 i21 go /it_ +'Ia ALLii1 1 / `f I1 fu - ,• R ••': ~rte " -skim 1II ' . 1 + •. • 1/ 1•— ,;,,;Ilf' + 1rYP1 jl A ElmOwl nn 1 LYE 111mmmmlim 1FffA I Mil! W, I VA 4&rCft-WW MmWb-&2sM%&aw r+r rmdrarr r 06.- r Aftw: %dm.ft , APPENDIX A CITY OF BAKERSFIELD FIRE DEPARTMENT LETTERS DATED JULY 7, 2010 AND SEPTEMBER 179 2010; AND CITY OF BAKERSFIELD FIRE DEPARTMENT E -MAIL CORRESPONDENCE DATE OCTOBER 109 2010 Donald J. Froze Fire Chief Tyler Harfley Douglas Greener Deputy Chiefs HOWARD H. WINES, III DIRECTOR PREVENTION SERVICES 2101 H Street Bakersfield, CA 93301 VOICE: (661) 326 -3979 FAX: (661) 852 -2171 f JUL 1 2 Z010 0 July 7, 2010 Ms. Andrea Wing BY: .......... t, ...... Shell Oil Products US 20945 S. Wilmington Ave Carson, CA 90810 RE: Underground Storage Tank Clean -up Closure Request and Work Plan for removal of Monitoring Wells for 4050 Gosford Road, Bakersfield, California Dear Ms: Wing: This is to inform you that this department has reviewed the result of the final vapor extraction well samples dated July 1, 2010, prepared by Delta Consultants, and is in concurrence with a "Low Risk Closure" for the above mentioned site. Prior to issuing a No Further Action letter, the past history MUST be uploaded into the GEOTRACK system. The last entry was on November 6, 2008. This requirement must be met to satisfy the public viewing of this case (case # 015- 021 - 000070). Once the information has been up- loaded a notice to the public must be sent out to inform all interested parties of the proposed closure as pursuant to Section 2728 of the California Code of Regulations, Title 23, Division 3, Chapter 16. Please provide this office with a list of the addresses businesses and residences), the assessor's parcel numbers and.a copy of the notice that was sent to those addresses in the affected area. If closure is still appropriate after a 30 day public comment period, this office will send you a request to destroy the soil vapor extraction and monitoring wells. The work plan for removal to those wells prepared by Delta Consultants is acceptable to this office and therefore will not need to be re- submitted. You will however be required to notify this office ten days prior to removal of the wells. If you have any questions regarding this matter, please contact me at (661) 326 -3979. Sincerely, ' tommeng Craig Per ins R.E.A. Hazardous Materials Specialist n cc: P. Gilchrist REA, Delta Consultants E R S F I DIRE ARTM 4W Ronald J. Fraze Fire Chief Tyler Hartley Douglas Greener Deputy Chiefs HOWARD H. WINES, M DIRECTOR PREVENTION SERVICES 2101 H Street. Bakersfield, CA 93301 VOICE: (661) 326 -3979 FAX: (661) 852 -2171 September 17, 2010 Ms. Andrea Wing. Shell Oil Products US 20945 S. Wilmington Carson, CA 90810 RE: Soil Remediation for 4050 Gosford Road, Bakersfield, California. Dear Ms. Wing; On August 20, 2010 the Bakersfield Fire Department mailed a Public Notice to all interested parties in the site vicinity inviting participation in the closure process. We have received no responses from interested parties during the 30 day public comment period. Therefore, prior to the issuance of a no further action letter, you are directed to document the disposition of the soil vapor wells. Please submit a report documenting the destruction of the soil vapor wells that will not remain, or a plan to maintain any on -site monitoring wells. Please notify this office forty-eight (48) hours prior to commencing work for the removal of the soil vapor wells. If you have any questions regarding this matter, please contact me at 661) 326 -3684. Sincerely, Mont Craig Perkins REA ` Hazardous Materials Specialist R. cc: Phil Gilchrist REA Delta Environmental Heng Chao 2410 Phil Gilchrist From: Craig Perkins [ctperkins@bakersfieldcity.us] Sent: Thursday, October 07, 2010 2:35 PM To: Phil Gilchrist Subject: Re: 4050 Gosford Road, Bakersfield, CA - Well Abandonment Phil Pressure grouting VEW -4 would be fine. Just send me an addendum page for the work plan before working on this well. Craig Perkins REA Hazardous Materials Specialist Bakersfield Fire Department 661) 326 -3684 ctperkins @bakersfieldfire.us Phil Gilchrist" <PGilchrist @deltaenv.com> 10/7/2010 2:14 PM >>> Mr. Perkins, When we went out to mark the site for these well abandonments, we noticed the property owner had placed a steel storage container extremely close to vapor well VEW -4 (see attached map and photo). The property owner has advised that moving this storage container would be a hardship, due its contents, size, and weight. We would like your approval to abandon this vapor well by pressure grout, rather than over - drill. Can you approve this modification? Respectfully, Philip L. Gilchrist I Project Manager, R.E.A., C.E.M. Consultants, an Oranjewoud N.V. Company Direct: 626.873.2730 1 Cellular: 626.354.3703 1 Fax: pgilchrist @deltaenv.com <mailto:pgilchristl @deltaenv. http: / /www.deltaenv.com /> Sustainable Strategies for Global Leaders I North American Operations Delta 626.256.6263 com> 1 www.deltaenv.com Member of Inogen(r) I www.inogenet.com <http: / /www.inogenet.com /> Confidentiality Notice: If you are not the intended recipient of this email, please delete it. Thank you. 1 APPENDIX B DELTA CONSULTANTS RESPONSE ToAGENCYAND WORKPLAN FOR VAPOR WELL ABANDONMENT DATE JULY 19 2010 SUSTAINABLE STRATEGIES FOR GLOBAL LEADERS July 1, 2010 DELTA Project No. SCA4050G 1 D SAP No. 121224 City ofBakersfield Fire Department Environmental Services 1501 Truxton Avenue, I' Floor Bakersfield, California 93301 Attention: Mr. Craig Perkins Re: Response to Agency and Work Plan for Vapor Well Abandonment Shell Branded Service Station 4050 Gosford Road Bakersfield, California D E LTA Dear Mr. Perkins: On behalf of Equilon Enterprises LLC dba Shell Oil Products US (SHELL), Delta Consultants (DELTA) submits this Response to Agency and Work Plan for Vapor Well Abandonment for the above - referenced site. This document was prepared in response to a City of Bakersfield Fire Department (CBFD) letter dated May 11, 2010 (Appendix A). The CBFD letter was in response to DELTA's Confirmation Soil Boring Report and Case Closure Request dated February 25, 2010. The CBFD requested a final sampling of the onsite vapor wells and a work plan for the removal of the vapor wells. This document presents the results of the final sampling event of onsite vapor wells and a work plan for vapor well abandonment. This work plan has been prepared to comply with the California Code of Regulations, Title 23, Division 3, Chapter 16, Article 11. The following site background information is provided and followed by a detailed scope of work for the proposed site assessment. All work will be performed under the supervision of a California - professional geologist and/or professional civil engineer. xInogen„ ,,_ 911 South Primrose Avenue Suite K Monrovia, CA 91016 USA Phone: 626.256.6662/ 800.477.7411 Fax: 626.256.6263 www.deltaenv.com City ofBakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 2 BACKGROUND SITE DESCRIPTION The subject site is currently an active Shell branded 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 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). PREVIOUS SITE INVESTIGATIONS AND ENVIRONMENTAL ACTIVITIES Previous soil boring and vapor well construction data is summarized in Table 1. Soil vapor sampling analytical data is presented in Tables 2 and 3. Previous environmental activities at the site are summarized in the following table. Boring and vapor well locations are shown on Figure 2. SUMMARY Activity / No. of Borings / Report Date Consultant Comments Method Samples Date Phase II 6 Soil Borings Pacific Petroleum hydrocarbons Environmental 1 /00 BB -1 through Unknown Environmental detected in soil (BB -1, BB -2 Site BB -6) Group (PEG) and BB -6) Assessment Total Petroleum Hydrocarbons as gasoline (TPH -g) and Total8SoilSamplesin Petroleum Hydrocarbons as the Former Soil Sampling Diesel (TPH -d) detected with Dispenser Area IT during SB989 maximum concentrations of 10 7/Ol and 12 Soil Unknown Corporation Upgrade milligrams per kilogram Samples in the IT) Activities mg/kg) and 210 mg/kg, Former Piping respectively. Maximum methylArea tert -butyl ether (MTBE) detected at 13 mg/kg. TPH -g detected at a maximum Over- 8 Soil Samples in concentration of 7.9 mg/kg. 7/01 Excavation Over - Excavation Unknown IT Maximum MTBE detected at Activities Area 16 mg/kg. Fifty cubic yards of soil removed. Continued) City of Bakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 3 SUMMARY (continued) Activity / No. ofBorings / Report Date Consultant Comments MMethod Samples Date 6 soil borings to Maximum TPH -g detected at Site maximum 65 feet WGR 15 mg/kg, maximum TPH -d 6/03 Assessment below ground surface (bgs) 7/21/02 Southwest, detected at 4.6 mg/kg, and Activities 1313-7 through Inc. (WGR) maximum MTBE detected at BB -12] 16 mg/kg Maximum MTBE and tert- 8 soil borings to Site butyl alcohol (TBA) maximum 85 feet 5/03 Assessment 6/16/03 WGR concentrations in soil were 47 13bgs (1313- Activities mg/kg and 16 mg/kg, through 1313-20) respectively All wells constructed with 2- inch Schedule 40 PVC with Soil Vapor 5 dual - nested 0.020 -inch slotted screen. Extraction SVE wells 9/03 10/27/03 WGR Maximum MTBE and TBA SVE) Well VEW -1 through concentrations in soil were 85 Installation VEW -5) mg/kg and 29 mg/kg, respectively Site tested to obtain data on vapor extraction parameters for use to design an SVE remediation system. Radius of influence (ROI) up to 25 feet for wells screened in the 12/03 SVE Pilot Test 2/9/04 DELTA shallow zone and 33 feet for wells screened in the deeper zone. TPH -g mass removal rates estimated at 53.9 pounds per day (lbs /day) and MTBE mass removal rates estimated at 37.5 lbs /day Update to Submitted revised SVE test Results of calculations, which resulted in 4/04 4/15/04 DELTA SVE Pilot increased values for flow and Tests mass removal rate Continued) City ofBakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 4 SUMMARY (continued) Activity / No. of Borings / Report Date Consultant Comments Method Samples Date Proposed natural attenuation with long term monitoringCorrective NINA) as the remedial 11/04 Action Plan 11/11/04 DELTA approach to address residual RAP) hydrocarbons in vadose zone soils Confirmation Documented verbal approval of Verbal of RAP by the City of1/05 Approval: 1/24/05 DELTA Bakersfield Fire Department Remedial CBFD) Action Plan Described proposed scope of Permission to work for vapor monitoring, Discharge Soil which includes the release ofVaporfrom 4/05 4/4/05 DELTA soil vapors into the Onsite Wells atmosphere. Requestedintothe permission to discharge soil Atmosphere vapors into the atmosphere Submitted quarterly updates 1/04— Quarterly including soil vapor 04/08 Updates Various DELTA monitoring data to monitor natural attenuation parameters Low Risk Site Requested Low Risk Closure5/08 Closure 5/12/08 DELTA ofthe Site Request Agency Letter Low Risk Closure Denied; 10/08 10/29/08 DELTA CBFD) Active Remediation Required Response to Agency LetterResponseto providing additional3/09 Agency Letter 3/6/09 DELTA information in support of case of 10/29/08 closure Continued) City of Bakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 5 SUMMARY (continued) Activity / No. of Borings / ReportDate Consultant Comments Method Samples Date Meeting with SBCFD, SHELL, and DELTA Meeting with regarding challenges to case5/09 5/08/09 DELTA SBCFD closure. SBCFD request a work plan for soil confirmation borings Work plan for Proposed three Work plan proposed soil 6/09 Soil soil confirmation 6/19/09 DELTA borings as locations discussed Confirmation borings with SBCFD on 5/8/09 Borings Requested four Requested two proposed soil 8/09 Agency Letter soil confirmation 8/03/09 DELTA boring relocated and adding aSBCFD) borings fourth soil boring Addendum to Per telephone conversations Work plan for Proposed three between DELTA and SBCFD 9/09 Soil soil confirmation 9/10/09 DELTA addendum addressed relocation Confirmation borings oftwo soil borings, and no Borings requirement for a fourth boring Requested Revised Work plan 9/09 Agency e-mail 9/14/09 DELTA to incorporate Addendum in one document Confirmation 3 soil borings to TPH -g detected at 0.59 mg/kg, Soil Boring 100 feet bgs maximum MTBE detected at 2/10 Report and 2/25/] 0 DELTA CB -1 through 0.73 mg/kg, and TBA detectedCaseClosure CB -3) at 0.14 mg/kgRequest Requested final sampling of 5/10 Agency Letter 5/11/10 DELTA vapor wells and work plan for CBFD) vapor well abandonment REGIONAL 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 City ofBakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 6 primarily of poorly graded and unconsolidated sands, sandy gravels and occasional discontinuous lenticular bodies of sandy clay and silt. Regionally, the surface ofthese 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 363 feet above mean sea level (msl). 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. 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 140 feet below ground surface (bgs) in February 2009, according to California Water Service records. SITE SPECIFIC GEOLOGY AND HYDROGEOLOGY The soils encountered at the site during vapor extraction well installation activities conducted in September 2003 consisted primarily of fine- grained sand to the total depth explored of approximately 85 feet below ground surface bgs). A sandy to silty clay layer was encountered above approximately 12 feet bgs. RESPONSE TO AGENCY VAPOR WELL SAMPLING On May 25, 2010 a DELTA field technician mobilized to the site to collect discreet vapor samples from dual nested wells VEW -1 through VEW -5. Each dual nested well location consists of two vapor wells screened at different intervals (Table 1). A total often vapor samples were collected from the onsite dual nested vapor wells. Each vapor well was purged for approximately ten minutes using an extraction blower. A vapor sample was subsequently collected from each well in Tedlafr"' bags. The samples were submitted under chain -of- custody protocols to Cal Science in Garden Grove, California for analysis. Cal Science is a California - certified analytical laboratory. Vapor samples were analyzed for the following compounds: Benzene, toluene, ethylbenzene, and total xylenes (BTEX), fuel- oxygenates including MTBE, TBA, tert- amyl methyl ether (TAME), di- isopropyl ether (DIPE), and ethyl tert-butyl ether (ETBE) using Environmental Protection Agency (EPA) Method TO -15; TPH -g using EPA Method TO -3 Modified; and Methane, carbon dioxide, carbon monoxide, oxygen, and nitrogen (Fixed Gases) using American Society for Testing and Materials (ASTM) D -1946. City of Bakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 7 Field data sheets are included as Appendix B. VAPOR SAMPLE ANALYTICAL RESULTS AND DATA EVALUATION Analytical Results A summary of soil analytical results follows, and the results are presented on Tables 2 and 3 and Figure 3. Certified analytical reports are included in Appendix C. Benzene was detected at a concentration of 0.00053 parts per million (ppm) in well VEW -3A and 0.00056 ppm in well VEW -4B. Ethylbenzene was detected at a concentration of 0.0013 ppm in well VEW -3A and 0.00069 ppm in well VEW -4B. Total xylenes were detected at a concentration of 0.0055 ppm in well VEW -3A. MTBE was detected in seven of the 10 vapor wells at concetrations ranging from 0.0024 (VEW -5A) to 0.92 ppm (VEW -3B). TPH -g, toluene, total xylenes, TBA, DIPE, TAME, and ETBE were not detected above laboratory reporting limits. Data Evaluation TPH -g, BTEX, and fuel oxygenates concentrations were generally consistant with or lower than the conctrations detected during the previous sampling event conducted in March 2008 (First Quarter 2008). However, concentrations of benzene and ethylebenzene increased in wells VEW -3A and VEW -4B, total xylenes increased in well VEW -3A, and MTBE increased in wells VEW -3A, VEW -3B and VEW -4B, as summarized in the following table: Vapor Well Concentration Increase from March 2008 to May 2010 (ppm) Benzene Ethylbenzene Total Xylenes MTBE VEW -3A 0.00003 0.0008 0.0040 0.00030 VEW -3B None None None 0.66 VEW -4A None None None 0.00030 VEW -4B 0.00006 0.00019 None None Petroleum hydrocarbon and fuel oxygenate concentrations in soil vapor at the site are either stable or decreasing in all wells with the exception of minor increases in several analytes in wells VEW -3A, VEW -3B, VEW -4A, and VEW -4B. WORK PLAN FOR VAPOR WELL ABANDONMENT SCOPE OF WORK City of Bakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July 1, 2010 Page 8 DELTA proposes to abandon five dual nested vapor monitoring well locations (VEW -1 through VEW -5) by over - drilling each nested well. Boring logs and well construction diagrams are included as Appendix D. Pre -field Activities Upon approval of the work plan, DELTA will visit the site to mark the well locations, contact Underground Services Alert at least 48 hours prior to drilling, arrange the drilling schedule, and supervise a drilling contractor. Prior to boring advancement, a utility locator contractor will perform a geophysical survey of the proposed well locations to check for below grade obstructions or utilities. DELTA will obtain the required permits from the CBFD. Notifications regarding field activities will be made in advance to the appropriate agencies and the property owner. Monitoring Well Destruction Activities Prior to drilling, the well locations will be cleared using air -knife equipment to a depth of approximately eight feet bgs. A hollow stem auger drill rig will be used to over -drill each well location and remove all well materials. The resulting boreholes will be backfilled with a 5% bentonite / 95% cement mixture using the augers as a tremie pipe to approximately 3 feet bgs. The former vapor well locations will be capped with concrete to the surface and finished to match the existing surface. Waste Disposal Soil, rinseate water and other materials generated during abandonment activities will be placed in Department of Transportation (DOT)- approved 55- gallon drums. The drums will be sealed and labeled in accordance with the appropriate protocols and each drum will be identified on a waste inventory form. The drums will be temporarily stored on -site, pending transport and disposal by SHELL's waste management contractor. Disposal of drill cuttings and rinseate at appropriate disposal or recycling facility will be coordinated by DELTA. Report Preparation Upon completion of the well abandonment activities, a report will be prepared detailing the complete results of the activities. A final copy will be submitted to the CBFD approximately 90 days after completion of the field work. City of Bakersfield Fire Department Response To Agency and Workplan for Vapor Well Abandonment July I, 2010 Page 9 L MITATIONS The recommendations and conclusions contained in this work plan represent DELTA's professional opinions based upon the currently available information and are arrived at in accordance with currently acceptable professional standards. This work plan is based upon a specific scope of work negotiated with the City of Bakersfield Fire Department. 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 work plan will be performed. This document 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 work plan. If you have any questions regarding this site, please contact Mr. Philip L. Gilchrist (DELTA) at (626) 873 -2730 or Ms. Monica Ortega (DELTA) at (626) 873 -2728, or the SHELL Project Manager is Ms. Andrea Wing, who can be reached at (714) 731 -1050. Sincerely, Delta Consultants 1r- e1ed Envlro' 0m c av L. ej <, Y V, y W 7 y qr! /FORN P Philip L, Gilchrist, R.E.A. 3004'\ Project Manager Registered Environmental Assessor cc: Ms. Andrea Wing, Shell Oil Products US Heng and Sing Chao, Property Owners l-. C°+-I Scott Pearson, P.G. 6931 Consultant QC SCOTT N. PEARSON o No 6931 Exp, 5/31/2012 ATTACHMENTS: TABLES Table 1 — Well and Boring Data Table 2 — Soil Vapor Sampling Analytical Data (Hydrocarbons and Fuel Oxygenates) Table 3 — Soil Vapor Sampling Analytical Data (Fixed Gases) FIGURES Figure 1 — Site Location Map Figure 2 — Site Map Figure 3 — Soil Vapor Analytical Results 5/25/2010 APPENDICES Appendix A — City of Bakersfield Fire Department Letter dated May 11, 2010 Appendix B — Field Data Sheets Appendix C — Laboratory Reports and Chain -of- Custody Documentation Appendix D — Vapor Well Boring logs and Well Construction Diagrams Tables TABLE 1 WELL AND BORING DATA 4050 Gosford Road, Bakersfield, California Name Type) Date Drilled/ Installed Approx Sur£ E. lev ftAMSL) Total Depth ft) Sow ample: Zncr Depth ft) (ft) F rsGGW Depth Elev ft) (ftAMSU Screen D arueten m;) Screen Depth(ft) Top Bottom Comments; B13-1 Boring 1/19/00 40 5 540 BB -2 Boring 1/19/00 40 5 5-40 BB -3 Boring 1/19/00 20 5 5 -20 BB4 Boring 1/19/00 20 5 5 -20 BB -5 Boring 1/19/00 20 5 5 -20 BB -6 Boring 1/19/00 20 5 5 -20 BB -7 Boring 6/21/02 60 5 5 -60 Hollow Stem Auger BB -8 Boring 6/20/02 60 5 5 -60 Hollow Stem Auger BB -9 Boring 6/20/02 65 5 5-65 Hollow Stem Auger BB -10 Boring 6/20/02 65 5 5 -65 Hollow Stem Auger BB -11 Boring 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 516103 85 5 5 -85 Hollow Stem Auger BB -14 Boring 5/7/03 85 5 5 -85 Hollow Stem Auger BB -15 Boring 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 Stem 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 Stem Auger BB -20 Boring 5/6/03 85 5 5 -85 Hollow Stem Auger VEW -lA Vapor Extraction Well 9/25/03 55 5 5 -55 2 10 30 Hollow Stem Auger VEW -113 Vapor Extraction Well 9/25/03 55 5 5 -55 2 40 55 Hollow Stem Auger VEW -2A Vapor Extraction Well 9/24/03 60 5 5 -60 2 5 30 Hollow Stem Auger VEW -213 Vapor Extraction Well 9/24/03 60 5 5-60 2 40 60 Hollow Stem Auger VEW -3A Vapor Extraction Well 9/24/03 50 5 5 -50 2 5 25 Hollow Stem Auger VEW -313 Vapor Extraction Well 9/24/03 50 5 5 -50 2 35 50 Hollow Stem Auger VEW4A Vapor Extraction Well 9/23/03 65 5 5 -65 2 10 30 Hollow Stem Auger VEW4B Vapor Extraction Well 9/23/03 65 5 5 -65 2 40 65 Hollow Stem Auger VEW -5A Vapor Extraction Well 9/23/03 65 5 5-65 2 5 30 Hollow Stem Auger VEW -5B Vapor Extraction Well 9/23/03 65 5 5 -65 2 40 65 Hollow Stem Auger C13-1 Boring 10/15/09 100 5 10 -100 Air Knifed to —10' b s CB -2 Boring 10/14/09 100 5 10 -100 Air Knifed to —10'bgs CB -3 Boring 10/15/09 100 5 10 -100 Air Knifed to ---10' b s Notes: AMSL = Above mean sea level Not applicable Data prior to September 2003 supplied by WGR Southwest, Inc. Page 1 of 1 XYGENATES) DATE TPH -G pp-) TPH -G u BENZENE m TOLUENE m ETHYL- BENZENE m TOTAL XYLENES m MTBE m MTBE u TBA m DIPE m ETBE m TAME m VEW -IA 4/1412005 ND<i.0 ND ND<0.0005 0.0022 0.002 0.0146 1.1 4.0 ND<0.002 ND<0.002 ND <0.002 ND<0.002 5/1812005 ND<3.0 ND 0.00071 0.0017 0.00094 0.0038 2.0 7.1 ND<0.002 ND<0.002 ND <0.002 ND<0.002 6/20/2005 ND<3.0 NO 0.00054 0.0011 ND<0,0005 0.00292 1.2 4.5 ND<0.002 ND <0,002 ND<0.002 ND<0.002 7/14/2005 ND<3.0 ND 1 0.00074 0.0018 ND<0.0005 0.00186 1.2 1 4.4 ND<0.002 ND<0.002 ND <0.002 I ND<0.002 8/92005 ND4.0 ND ND<0.002 0.0054 ND<0.002 ND<0.004 0.7 2.5 ND<0.008 ND<0.008 ND <0.008 ND<0.008 9282005 3.2 13 0.0040 0.026 0.015 0.129 0.93 33 ND<0.004 ND <0.004 ND<0.004 ND<0.004 10/13/2005 ND<3.0 ND ND<0.0005 0.0021 ND <0.0005 ND<0.0005 0.51 1.5 ND<0.002 ND<0.002 ND <0.002 ND<0.002 2/12006 ND<3.0 ND ND<0.00050 0.00084 ND<0.00050 ND<0.0010 0.100 0.37 ND<0.002 ND<0.002 ND <0.002 ND<0.002 5/162006 ND<3.0 ND ND<0.00050 0.00230 0.00068 0.00120 0.013 0.05 ND<0.002 ND<0.002 ND<0.002 ND<0.002 8/1612006 ND<3.0 ND ND<0.00050 0.0017 0.00088 0.0028 0.007 0.026 ND<0.002 ND<0.002 ND<0.002 ND<0.002 12/272006 ND<3.0 I NO ND<0.00050 0.0079 0.00160 1 0.0052 0.0037 0.013 ND<0.002 ND<0.002 ND <0.002 ND<0.002 3/10/2007 53 21 1 0.0023 0.0049 0.0009 0.006 0.0034 0.012 ND<0.002 ND <0.002 ND<0.002 ND<0.002 6/192007 NDQ.0 ND ND<0.00050 0.0019 0.00087 0.0073 0.0025 0.0090 ND<0.002 ND<0.002 ND<0.002 ND<0.002 921/2007 ND<3.0 ND 0.011 0.086 0.02 0.121 0.0062 0.022 ND<0.002 ND<0,002 ND <0.002 ND<0.002 12/32007 ND<3.0 ND ND<0.00050 0.003 0.00072 0.00316 0.0024 0.0087 ND<0.002 ND<0,002 ND<0.002 ND<0.002 3/52008 ND<3.0 ND ND<0.00050 0.0020 ND<0.00050 0.0010 0.0039 0.014 ND <0.0020 ND<0.0020 ND<0.0020 ND<0.0020 5252010 ND <1.5 ND ND<0.0005 ND<0.005 ND<0.00051 ND<0.002 0.0028 0.010 ND<0.005 ND<0.002 ND <0.002 NIX0.002 VEW -16 4/142005 ND<.O ND ND<0.0005 0.0035 0.0028 0.0181 1.2 4.2 ND<0.002 ND <0.002 ND<0.002 ND<0.002 51182005 ND<3.0 ND ND<0.0005 0.0019 0.00089 0.00329 0.0023 0.0083 ND<0.002 ND<0,002 ND<0.002 ND <0.002 6202005 ND<3.0 ND ND<0.0005 0.001 ND<0.0005 0.00275 0.14 0.52 ND<0.002 ND<0.002 ND<0.002 ND<0.002 7/142005 ND<3.0 ND 0.00058 0.0011 ND <0.0005 ND<0.001 0.0053 0.019 ND<0.002 ND<0.002 ND<O.002 ND<0.002 8/92005 ND<3.0 ND ND<0.002 0.0034 ND<0.002 ND <0.004 0.17 0.60 ND<0.008 ND<0.008 ND<0.008 ND<0.008 9282005 ND<3.0 ND 0.0019 1 0.011 0.0049 0.042 0.160 0.59 ND<0.004 ND<0.004 ND<0.004 ND<0.004 10/132005 ND<3.0 ND ND<0.0005 0.0024 ND <0.0005 ND<0.001 0.008 0.027 ND <0.002 ND<0.002 ND<0.002 ND<0.002 2/12006 5/162006 ND<3.0 ND<3.0 ND ND 0.00067 0.00084 0.0024 0.0025 ND<0.0005 0.00056 ND <0.001 0.0025 ND<O.002 0.0063 ND<0.0072 0.023 ND<0.002 ND-D.002 ND<0.002 ND<0.002 ND<0.002 ND<0.002 ND<0.002 ND<0.002 8/162006 ND<3.0 ND ND<0.0005 0.0024 0.0021 0.0068 0.0066 0.024 ND <0.002 ND<0.002 ND<0.002 ND<0.002 12/272006 ND<3.0 ND ND<0.00050 0.0071 0.0014 0.0047 0.0043 0.015 ND <0.002 ND<0.002 ND<0.002 ND<0.002 3/102007 9.1 37 0.0025 0.0063 0.0022 0.0073 0.0023 0.0083 ND<0.002 ND<0.002 ND <0.002 ND<0.002 6/192007 ND<3.0 ND ND <0.00050 0.0031 0.0016 0.0127 0.0036 0.013 ND <O.002 ND<0.002 ND<0.002 ND<0.002 9212007 ND<3.0 ND 0.019 1 0.091 0.028 0.12 0.0061 0.022 ND <0.002 ND<0.002 ND<0.002 ND<0.002 1132007 ND<3.0 ND 0.00067 0.0045 0.0015 0.0067 0.003 0.011 ND<0.002 ND<0,002 ND<0.002 ND<0.002 3/52008 ND<3.0 ND ND<0.00050 0.0025 ND<0.00050 ND<0.0015 0.0031 0.011 ND<0.0020 ND<0.0020 ND<0.0020 ND<0.0020 5252010 ND<I.5 ND ND<0.0005 ND<0.005 ND<0.00051 NIX0.002 0.0025 0.0091 ND<0.005 ND<0.002 ND <O.002 ND<0.002 VEW -2A 4/142005 18 74 ND<0.002 0.0028 0.0029 0.0197 9.7 35 ND<0.008 ND <0.008 ND<0.008 ND<0.008 5/18/2005 20 82 1 0.0036 0.002 0.0011 0.00309 20 73 ND<0.002 ND <0.002 0.002 0.0022 6202005 150 615 ND<0.005 ND<0.005 ND<0.005 ND<0.005 8.8 32 ND<0.02 ND<0.02 ND<0.02 ND<0.02 7/142005 25 102 0.00078 0.0023 ND<0.0005 0.0027 16.0 57 0.012 ND<0.002 I 0.0065 ND<0.002 8 /92005 240 984 ND<0.033 ND<0.033 ND<0.033 ND<0.065 4.0 15 ND <O.13 ND<0.13 1 ND<0.13 ND<0.13 9282005 33 14 0.0017 0.010 0.0048 0.040 0.830 3 ND<0.004 ND<0.004 ND <0.004 ND<0.004 101132005 53 22 ND<O.001 ND<0.001 ND<0.001 ND <0.002 2.400 8.6 ND<0.04 NDm,04 ND <0.04 ND<0.04 2/12006 ND<3.0 ND ND<0.00050 0.0011 ND <0.00050 ND<0.0010 0.820 3.0 ND <0.002 ND<0.002 ND<0.002 ND<0.002 5/162006 NDG3.0 ND ND<0.00050 0.0018 0.00056 0.0025 0.720 2.6 ND<0.002 ND <0.002 ND <0.002 ND<0.002 8/162006 ND<3.0 ND ND<0.00050 0.0015 0.00089 0.0029 0.180 1 0.65 ND<0.002 ND<0.002 ND<0.002 ND<0.002 12272006 ND<3.0 ND ND<0.00050 0.0087 0.0014 0.0047 0.0031 0.11 ND<0.002 ND<0.002 NIX0.002 ND<0.002 3/102007 ND<3.0 ND 0,0015 0.0033 1 0.00098 0.0028 0.031 0.11 ND <0.002 ND <0.002 ND<0.002 ND<0.002 6/19/2007 ND<3.0 ND ND<0.00050 0.0014 0.0005 0.0073 0.0059 0.021 ND<0.002 ND<0.002 ND<0.002 NIX0.002 9212007 ND4.0 ND 0.0076 0.054 0.014 0.12 0.028 0.10 ND <0.002 ND<0.002 ND<0.002 ND<0.002 12/3/2007 ND<3.0 ND 0.0011 0.0064 0.0012 0.0043 0.0084 0.03 ND <0.002 ND<0.002 ND<0.002 ND<0.002 3/52008 ND<3.0 ND ND<0.00050 0.0025 ND<0.00050 ND<0.0015 0.0075 0.027 ND<0.0020 ND<O.0020 ND<0.0020 ND<0.0020 5252010 ND<1.5 ND NDcO.0005 ND<0.005 ND<0.00051 NIX0.002 0.0033 0.012 ND<0.005 ND-cD,002 ND<0.002 ND<0.002 Page 1 of 5 FUEL OXYGENATES) DATE TPH -G PP-) TPH -G u BENZENE m TOLUENE m ETHYL- BENZENE m TOTAL XYLENES m MTBE m MTBE u TBA m DIPE m ETBE m TAME m VEW -2B 4114/2005 4.9 20 ND<0.0005 0.0011 0.00074 0.0052 3.5 13 ND<0.002 ND<0.002 0.0028 ND<0,002 5/18/2005 ND<3.0 ND ND<0.0005 0.0011 0.00075 0.00259 0.011 0,041 ND<0.002 ND<0.002 ND<0,002 NIX0.002 6202005 5.7 23 0.00057 0.0011 ND<0,0005 0.0032 7.9 29 0.0067 ND<0.002 0.003 ND<0.002 7/14/2005 ND<3.0 ND 0.00098 0.0017 ND<0.0005 0.0024 0.0085 0.031 ND<0.002 ND<0.002 ND<0.002 ND<0.002 8/92005 5.5 23 ND<0.002 0.0028 ND<0.002 ND<0.004 4.6 17 0.023 ND<0.008 ND<0,008 ND<0.008 9282005 73 30 ND<0.2 ND@4 ND<0.2 ND<0.2 11 39 ND<0.8 ND<0.8 ND<0.8 ND<0.8 10/132005 ND<3.0 ND ND<0.005 0.0016 ND<0.005 ND<0.001 52 19 ND<0.002 ND<0,002 ND<0.002 ND<0.002 2/12006 ND<3.0 ND ND <0.00050 0.00093 ND<0.00050 ND<0.001 ND<0.002 ND<0.0072 ND<0.002 ND<0.002 ND<0,002 ND<0.002 5/1612006 ND<3.0 ND ND <0.00050 0.00015 ND<0.00050 0.00014 0.100 038 ND<0.002 ND<0.002 ND<0.002 ND<0.002 8/16/2006 ND<3.0 ND ND<0.00050 0.0013 0,00055 0.0018 0.089 032 ND<0.002 ND<0.002 ND<0.002 ND<0.002 12/272006 ND<3.0 ND ND <0.00050 0.0079 0.0014 0.0047 0.0032 0.012 ND<0.002 ND<0,002 ND<0,002 NIX0.002 3/102007 3.4 14 0.0036 0.0059 0.0022 0.0068 ND <0.002 ND<0.0072 ND<0.002 ND<0.002 ND<0.002 ND<0.002 6/192007 ND<3.0 ND ND<0.00050 0.0012 ND<0.00050 1 0.0021 0.0023 0.0083 ND<0.002 ND<0.002 ND<0.002 ND<0.002 921/2007 ND<10 ND 0.00077 0.0069 0.0012 0.0081 ND<0.002 ND<0.0072 ND<0.002 ND<0.002 ND<0.002 ND<0.002 12132007 ND<3.0 ND 0.0022 0.0110 0.0019 0.0070 0.041 0.15 ND<0.002 ND<0.002 ND<0,002 ND<0.002 3/52008 ND<3.0 ND ND<0.00050 0.0024 ND<0.00050 0.0010 ND<0.002 ND<0.0072 ND<0.0020 ND<0.0020 ND<0.0020 ND<0.0020 5252010 ND<1,5 ND ND<0.0005 ND<0.005 ND<0.00051 ND<0.002 ND<0.002 ND<0.0072 ND<0.005 ND<0,002 ND<0.002 ND<0.002 VEW -3A 4/142005 150 615 ND<0.02 ND<0.02 ND<0.02 ND<0.02 99 360 0.59 ND<0.08 ND<0.08 ND<0.08 5/182005 75 307 0.00082 0.0027 0.0017 0.0058 76 280 ND<0.002 ND<0.002 0.012 0.011 620/2005 1,600 6,557 0.059 ND<0.01 ND <0.01 ND<0.01 53 190 0.23 ND<0.04 ND<0.04 ND<0.04 7/14/2005 570 2,336 ND<0.005 ND <0.005 ND<0.005 ND<0.01 31 110 ND<0.02 ND<0.02 ND<0.02 ND<0.02 8/92005 2,200 9,016 ND<0.31 ND<0.31 ND<0.31 ND<0.63 52 190 ND<1.3 ND<1.3 ND <1.3 ND<1.3 92812005 100 410 ND<0.005 0.0062 ND<0.005 0.0285 32.0 110 0.087 ND<0.02 ND<0.02 ND<0.02 10/132005 55 1 225 ND <0.0075 0.019 ND<0.0075 ND <0.015 34.0 120 0.054 ND<0.015 ND<0.015 ND<0.015 2/12006 8.4 34 ND <O.0010 0.0013 ND<0.0010 ND<0.0020 7.7 28 ND <0.004 ND <0.004 ND<0.004 ND<0.004 5/162006 73 30 ND<0.0010 0.0013 ND<0.0010 ND<0.0020 7.7 28 ND<0.004 ND<0.004 ND<0,004 ND<0.004 8/162006 3.8 16 ND <0.0010 0.0022 0.0013 0.0045 1.5 5.6 ND<0.004 ND<0.004 ND<0.004 ND<0.004 12127/2 ND<3.0 ND ND<0.00050 0.0074 0.0032 0.011 1.2 43 ND<O.002 ND<0.002 ND<0.002 ND<0.002 3/10/2007 ND<3.0 ND 0.002 0.0024 ND <0.0020 ND<0.0020 039 1.0 ND<OM8 ND<0.008 ND<0.008 ND<0.008 6/192007 ND<3.0 ND 0.002 0.0023 0.0016 0.0058 0.042 0.15 ND<0.002 ND<0.002 ND<0.002 ND<0.002 9212007 ND<3.0 ND 0.01 0.056 0.016 0.132 ND<0.002 ND<0.0072 ND<0.002 ND<0.002 ND<0.002 ND<0.002 12/32007 ND<3.0 ND 0.00056 0.004 0.0011 0.0054 0.0053 0.019 ND<0.002 ND<0.002 ND <0.002 ND<0.002 3/52008 ND<3.0 ND ND<0.00050 0.0012 ND<0.00050 ND<0.0015 0.0039 0,014 ND<0.0020 ND <0.0020 ND<0.0020 ND<0.0020 5252010 ND<1.5 ND 0.00053 ND<0.005 0.0013 0.0055 0.0036 0.013 ND<0.005 ND<0.002 ND <0.002 ND<0.002 VEW-3B 4/14/2005 30 123 NDm.004 ND<0.004 ND<0.004 0.011 31 110 ND<0.016 ND<0.016 ND<0.016 ND<0.016 5/1812005 9.4 39 0.00085 0.0017 0.0015 0.0052 11 38 ND<0.002 ND<0.002 ND<0.002 ND<0.002 620/2005 18 74 0.001 0.0021 0.0014 0.011 12 44 ND<0.002 ND<0.002 0.003 ND<0.002 7/14/2005 17 70 0.001 0.0013 ND<0.0005 0.0016 19 68 ND<0.002 ND<0.002 ND <0.002 NIX0.002 8/92005 10 41 ND<0.002 0.003 ND<0.002 ND<0.004 8.6 31 ND<0.008 ND<0.008 ND<0.008 ND<0.008 928/2005 73 30 ND<0.02 ND<0.02 ND<0.02 ND<0.04 8.9 32 ND<0.08 ND<0.08 ND<0.08 ND<0.08 10/132005 9.2 38 ND<0.001 0.0031 ND<0.001 ND <O.002 10.0 36 ND<0.004 ND<0.004 ND<0.004 ND<0.004 2/12006 6.4 26 NDm.0010 0.0014 ND<0.0010 ND<0.0020 63 23 ND<0.004 ND<0.004 ND<0.004 ND<0.004 5/162006 12 49 ND <0.0010 0.0022 ND<0.0010 0.0022 9.2 33 ND<0.004 ND<0.004 ND<0.004 ND<0.004 8/16/2006 83 1 34 ND<0.0010 0.0019 0.0011 0.0037 8 29 ND<0.004 ND<0.004 ND<0.004 ND<0.004 12272006 9.4 39 ND<0.0010 0.0067 0.0031 0.011 12 42 ND<0.004 ND<0.004 ND <0.004 ND<0.004 3/10/2007 6.5 27 ND<0.002 ND<0.002 ND<0.002 ND<0.002 6.2 23 ND<0.080 ND<0.080 ND<0.080 ND<0.080 61192007 ND<3.0 NA ND<0.00050 0.0011 ND<0.00050 0.0019 0.63 23 ND<0.002 ND <0.002 ND<0.002 ND<0.002 9212007 5.7 23 0.0061 0.057 0.0092 0.088 5.9 21 ND<0.02 ND<0.02 ND<0.02 ND<0,02 12132007 33 14 ND<0.020 ND<0.020 ND<0.020 ND<0.040 3.7 13 ND<0.080 ND<0.080 ND<0.080 ND<0.080 3/52008 4.8 20 ND <0.00050 0.0019 ND <0.00050 ND <0.0015 016 0.94 ND<0.0020 ND<0.0020 ND<0.0020 ND<0.0020 525/2010 ND <1.5 ND ND<0.0005 ND<0.005 ND<0.00051 ND<0.002 0.92 33 ND<0.005 ND<0.002 ND<0.002 ND<0.002 Pape 2 of 5 TABLE2 SOIL VAPOR SAMPLING ANALYTICAL DATA (HYDROCARBONS AND FUEL OXYGENATES) 4050 Gosford Road, Bakersfield, California DATE TPH -G Pptn) TPH -G u BENZENE m TOLUENE m ETHYL- BENZENE m TOTAL XYLENES m MTBE m MTHE a TBA m DIPE m ETBE m TAME m VEW-4A 4/14/2005 1 MIN ND<3.0 ND ND<0.004 ND<0.004 ND<0.004 0.0087 039 1.4 ND<0.016 ND<0.016 ND<0.016 ND<0.016 4/14/2005 2 MIN ND<3.0 ND ND<0.005 ND<0.005 ND<0.005 ND<0.005 0.57 2.0 ND<0.016 ND<0.016 ND<0.016 ND <0.016 4/14/2005 5 MIN 43 18 ND<0.005 ND<0.005 ND<0.005 ND<0.005 1.50 53 ND<0.02 ND<0.02 ND<0.02 ND<0.02 5/1812005 ND<3.0 ND 0.00058 0.0016 0.0013 1 0.0059 0.94 3.4 ND <0.002 ND<0.002 ND<0.002 ND<0.002 612012005 85 ND 0.0017 0.0013 0.00068 0.0036 0.15 0.53 ND<0.002 ND<0.002 ND<0.002 ND<0.002 7/14/2005 33 14 0.0012 0.0016 ND<0.0005 0.003 0.17 0.61 ND <0.002 ND <0.002 ND<0.002 ND<0.002 8392005 ND<3.0 ND ND <0.002 0.0027 ND <0.002 ND<0.004 0.041 0.15 ND <0.008 ND<0.008 ND<0.008 ND<0.008 9/2812005 ND<3.0 ND ND <0.001 0.0074 0.0025 0.0207 0.052 0.19 ND<0.004 ND<0.004 0.018 ND<0.004 10/1312005 ND<3.0 ND ND<0.002 0.0025 ND<0.002 ND<0.004 0.058 0.21 ND<0.008 ND<0.008 ND<0.008 ND<0.008 2/1/2006 ND<3.0 ND ND<0.00050 0.00093 ND<0.00050 ND <0.0010 0.090 033 ND <0.002 ND<0.002 ND<0.002 ND<0.002 5/162006 N".O ND ND<0.00050 0.0018 ND<0.0010 0.0017 0.055 0.20 ND<0.002 ND<0.002 ND<0.002 ND<0.002 8/16/2006 ND<3.0 ND ND<0.00050 0.0015 0.00099 0.0032 0.022 0.080 NIX0.002 ND<0.002 ND<0.002 ND<0.002 1227/2006 ND<3.0 ND ND<0.00050 0.011 0.0059 0.019 0.026 0.092 ND<0.002 ND<O.002 ND<0.002 ND<0.002 3/102007 ND<10 ND ND<0.002 0.0024 ND<0.002 ND<0.002 0.012 0.043 ND<0.008 ND<0.008 ND<0.008 ND <0.008 6/192007 ND<3.0 ND ND<0.00050 0.00076 ND <0.00050 0.00100 ND <0.002 ND<0.0072 ND<0.002 ND<0.002 ND<0.002 ND<0.002 9212007 ND<3.0 ND 0.0082 0.077 0.014 0.121 ND<0.008 ND<0.029 ND<0.008 ND<0.008 ND<0.008 ND<0.008 12/32007 ND<3,0 ND ND<0.00050 0.0022 0.00060 0.00275 0.0054 0.019 ND<0.002 ND<0.002 ND<0.002 NEX0.002 3/52008 ND<3.0 ND ND<0.00050 0.0021 ND <0.00050 I ND <0.0015 0.0022 0.0081 ND<0.0020 NEX0.0020 ND<0.0020 ND<0.0020 5252010 ND <1.5 ND ND<0.0005 ND<0.005 ND<0.00051 NEX0.002 0.0025 0.0090 ND<0.005 ND<0.002 ND <O.002 ND<0.002 VEW4B 4/142005 1 MIN ND<3.0 ND ND<0.002 0.0021 0.0025 0.0156 1.3 4.5 ND<0.008 ND<0.008 ND<0.008 ND<0.008 4/142005 2 MTN ND<3.0 ND ND<0.004 ND<0.004 ND<0.004 NEX0.004 13 4.8 ND<0.016 ND<0.016 ND<0.016 ND<0.016 4/14/2005 5 MIN ND<3.0 ND NEX0.004 NIX0.004 ND<0.004 0.0081 1.2 4.4 ND<0.016 ND <0.016 ND<0.016 ND<0.016 5/1812005 ND<3.0 ND 0.00067 1 0.0012 0.0013 0.0054 0.0054 1 0.019 ND<0.002 N7X0.002 I ND<0.002 ND<0.002 620/2005 ND<3.0 ND 0.00067 0.0016 0.00074 1 0.005 0.13 0.47 ND<0.002 ND <0.002 ND<0.002 NEX0.002 7/142005 NEX3.0 ND 0.00092 0.0013 ND<0.0005 0.0018 ND<0.002 ND <0.0072 ND<0.002 NIX0.002 NEX0.002 ND<0.002 8/9/2005 ND<3.0 ND ND<0.002 0.0039 ND <0.002 ND<0.004 037 1.4 ND<0.008 ND<0.008 ND<0.008 ND<0.008 9282005 ND<3.0 ND ND<0.002 0.0075 0.0036 0.0295 0.25 0.91 ND <0.008 ND<0.008 ND <0.008 ND<0.008 10/13/2005 ND<3.0 ND ND<0.001 0.0026 ND <0.001 ND<0.002 0.034 0.12 ND<0.008 ND<0.008 ND <0.008 ND<0.008 2/12006 ND<3.0 ND ND<0.00050 0.0010 ND <0.00050 ND<0.0010 0.012 0.044 ND<0.002 ND<0.002 ND<0.002 ND <0.002 5/162006 ND<3.0 ND ND <0.00050 0.0022 0.00084 0.0027 0.130 0.49 1 ND <0.0032 ND<0.0032 ND<0.0032 ND <0.0032 8/162006 ND<3.0 ND ND <0.00050 0.0013 0.00086 0.0027 0.029 0.10 ND<0.0032 ND<0.0032 ND<0.0032 ND<0.0032 12272006 ND<3.0 ND 0.00074 0.012 0.0068 0.022 0.013 0.048 ND<0.002 ND<0.002 ND<0.002 NEX0.002 3/102007 ND<3,0 ND ND <0.002 ND<0.002 ND<0.002 ND<0.002 ND<0.008 ND<0.029 ND<0.008 NTX0.008 ND<0.008 ND<0.008 6/19/2007 ND<3.0 NA ND<0.00050 0.00110 ND<0.00050 0.00216 0.02300 NA ND<0.002 ND<0.002 ND<0.002 ND<0.002 921/2007 ND<3.0 NA 0.024 0.094 0.032 0.158 ND<0.002 ND<0.0072 ND<0.002 ND<0.002 Nl><0.002 ND<0.002 1213/2007 4.0 16 ND <0.020 ND <0.020 ND<0.020 ND<0.040 4.7 17 ND <0.080 ND <0.080 ND<0.080 ND<0.080 3/52008 ND<3.0 ND ND<0.00050 0.0014 ND<0.00050 ND<0.0015 ND<0.002 ND<0.0072 MX0.0020 ND<0.0020 NEX0.0020 ND<0.0020 525/2010 ND<1.5 ND 0.00056 ND <0.005 0.00069 NIX0.002 ND<0.002 ND<0.0072 ND<0.005 ND<0.002 ND<0.002 ND<0.002 VEW -5A 4/142005 89 365 ND<0.013 0.022 ND<0.013 ND<0.013 46 170 0.062 ND<10.05 ND <0.05 NEX0.05 5/18/2005 40 164 0.0009 0.003 0.0016 0.0056 55 200 0.014 ND<0.002 0.0074 0.0045 6202005 440 1,803 0.013 ND<0.005 MX0.005 0.0316 430 16 ND<0.02 ND <0.02 ND<0.02 ND<0.02 7/14/2005 92 377 0.0012 0.0017 ND<0.0005 0.0018 1.2 4.4 0.0095 ND<0.002 0.0038 ND<0.002 8192005 480 1,967 NIX0.063 ND<0.063 ND<0.063 N X0.13 3.0 11 ND<0.25 ND<0.25 ND-<0.25 ND<0.25 9282005 62 254 ND <0.002 0.0072 0.0047 0.036 1.7 1 6.1 ND <0.008 ND<0.008 ND<0.008 ND<0.008 10/132005 20 1 82 ND<0.002 0.0022 ND<0.002 ND<0.004 2.2 7.8 ND<0.008 ND<0.008 ND<0.008 ND<0.008 2/12006 ND<3.0 ND NEX0.00050 0.0011 MX0.00050 ND <0.0010 13 4.8 NDm.002 ND <0.002 NIX0.002 NEX0.002 5/162006 ND<3.0 ND ND <0.0010 0.0026 ND<0.0010 0.0028 0.320 1.2 ND<0.004 ND<0.004 ND-CO.004 NEX0.004 8/162006 ND<3.0 ND ND <0.00050 0.0019 0.0017 0.0058 0.083 030 ND<0.002 ND<0.002 ND<0.002 ND<0.002 121272006 ND<3.0 ND ND<0.00050 0.0064 0.0029 0.0095 0.021 0.077 ND<0.002 ND<0.002 ND<0.002 ND<0.002 31102007 ND<3.0 ND ND<0.002 0.0023 ND<0.002 ND<0.002 0.011 0.038 NDm.008 ND<0.008 ND<0.008 NIX0.008 121272006 ND<3.0 ND ND<0.00050 0.0064 0.0029 0.0095 0.021 0.077 ND<O.002 NIX0.002 ND<0.002 NIX0.002 6/192007 NS NS NS NS NS NS NS NS NS NS NS NS 9212007 ND- 3 ND O.023 0.19 0.032 0.228 0.017 0.062 ND<0.002 ND<0.002 ND<0.002 ND<0.002 12/32007 NEX3.0 ND ND<0.00050 0.0024 0.00070 0.0042 0.0076 0.028 NEX0.002 ND <0.002 ND<0.002 ND<0.002 3/52008 ND<3.0 ND ND<0.00050 0.0023 ND<0.00050 ND<0.0015 0.0067 0.024 ND<0.0020 ND<0.0020 ND <0.0020 ND <0.0020 525/2010 ND<1.5 ND ND<0.0005 ND<0.005 NEX0.00051 NIX0.002 0.0024 0.0088 ND <0.005 ND<0.002 ND<0.002 NEX0.002 age 3 of 5 TABLE2 SOIL VAPOR SAMPLING ANALYTICAL DATA (HYDROCARBONS AND FUEL OXYGENATES) 4050 Gosford Road, Bakersfield, California DATE TPH -G m TPH -G u BENZENE m TOLUENE m ETHYL -. BENZENE m TOTAL XYLENES m MTBE m MTBE u TBA m DIPE m ETBE m TAME m Page 4 of 5 TABLE2 SOIL VAPOR SAMPLING ANALYTICAL DATA (HYDROCARBONS AND FUEL OXYGENATES) 4050 Gosford Road, Bakersfield, California DATE TPH -G ppm) TPH -G u BENZENE m TOLUENE m ETHYL- BENZENE m TOTAL XYLENES m MTBE m MTBE u TBA m DIPE m ETBE m TAME m VEW -5B 4/14/2005 17 70 ND<0.004 ND<0.004 ND<0.004 ND<0.004 31 110 0.032 ND<0.016 ND<0.016 ND<0.016 5/18/2005 ND<3.0 ND 0.00062 0.0016 0.0013 0.0045 0.015 0.053 ND<0.002 ND<0.002 ND<0.002 ND<0.002 620/2005 23 94 0.00063 0.0011 ND<0.0005 0.00262 IS 53 0.02 ND<0.002 ND<0.002 ND<0.002 7/142005 ND<3.0 I ND 0.00069 0.0015 ND<0.0005 1 0.001 0.0031 1 0.011 ND<0.002 ND<0.002 ND<0.002 ND<0.002 8/92005 24 98 ND <0.002 0.0025 ND<0.002 ND<04004 33 120 0.02 ND<0.008 ND<0.008 ND<0.008 9282005 24 98 ND<0.001 0.0051 0.0023 0.0185 24 85 0.0046 ND<0.004 0.0041 ND<0.004 10/132005 10 ND ND<0.001 0.0001 ND<0.001 ND<0.002 13 46 ND<0.002 ND<0.002 ND <0.002 ND<0.002 2/12006 ND<3.0 ND ND<0.00050 0.0011 ND<0.00050 ND<0.001 ND<0.002 ND <0.0072 ND<0.002 ND<0.002 ND<0.002 ND<0.002 5/1612006 ND-1.0 ND ND<0.001 0.0020 ND<0.0010 0.0021 0.180 0.64 ND<0.004 ND<0.004 ND<0.004 ND<0.004 8/16/2006 ND<3.0 ND ND <O.00050 0.0017 0.0011 0.0035 0.011 0.040 ND<0.004 ND<0.004 ND<0.004 ND<0.004 12272006 ND13.0 ND I ND<0.00050 0.0073 0.0023 0.0080 ND<0.002 ND <0.0072 ND<0.002 ND<0.002 ND<0.002 I ND<0.002 3/1012007 ND©.0 ND 0.00290 ND<0.002 ND<0.002 ND<0.002 ND<0.002 ND<0.029 ND<0.002 ND<0.002 ND<0.002 ND<0.002 6/192007 NS NS NS NS NS NS NS NS NS NS NS NS 3/1012007 ND<3.0 ND 0.00290 ND<0.002 ND<0.002 ND<0.002 ND<0.002 ND<0.029 ND<0.002 ND<0.002 ND<0.002 ND<0.002 9212007 ND<3,0 ND 0.022 0.13 0.037 0.192 0.003 0.011 ND <0.002 ND <0.002 ND<0.002 ND<0.002 1213/2007 ND<3.0 ND 0.0026 0.00091 0.0057 0.0034 0.0089 0.032 ND<0.002 ND <0.002 ND<0.002 ND<0.002 3/52008 ND <3.0 ND ND <0.00050 0.0020 ND<0.00050 ND<0.0015 ND<0.002 ND <0.0072 ND<0.0020 ND<0.0020 ND<0.0020 ND<0.0020 5252010 ND<1.5 ND ND<0.0005 ND<0.005 ND<0.00051 ND<0.002 ND<0.002 ND<0.0072 ND<0.005 ND<0.002 ND<0.002 ND<0.002 Notes: TPH -G Concentration (ug/1) = TPH -G concentration (ppmv) x 10 x 100g/mole x mole/24.4 I x 106ug/g ND - Not detected NS - Not sampled NA - Not available ppm - parts per million ug/L - micrograms per liter TPH-G - Total petroleum hydrocarbons as gasoline MTBE - Methyl -tert butyl ether TBA - Tert-butyl alcohol DIPE - Di- isopropyl ether I PBE - Ethyl tert-butyl ether TAME - Tert -amyl methyl ether Page 5 of 5 TABLE 3 SOIL VAPOR SAMPLING ANALYTICAL DATA (FIXED GASES) 4050 Gosford Road, Bakersfield, California DATE .: Oxygeq ;; Nitrogen . Methane C$a) Carbo;Monoxide CO) Carbon;;D oxide: C z) VEW -IA 4/14/2005 10.1 79.7 ND ND 10.1 5/18/2005 12.6 79.5 ND ND 7.9 6/20/2005 10.1 80.5 ND ND 9.4 7/14/2005 10.3 79.1 ND ND 10.6 8/9/2005 10.0 78.9 ND ND 11.1 9/28/2005 10.9 76.9 ND ND 12.2 10/13/2005 12.3 79.0 ND ND 8.8 2/1/2006 12.8 79.6 ND ND 7.6 5/16/2006 14.1 79.8 ND ND 6.11 8/16/2006 14.1 79.4 ND ND 6.50 12/27/2006 15.1 79.4 ND ND 5.45 3/8/2007 18.3 78.8 ND ND 2.88 6/19/2007 15.8 79.0 ND ND 5.21 9/21/2007 16.0 78.2 ND ND 5.80 12/3/2007 16.5 77.8 ND ND 5.67 3/5/2008 17.4 78.2 ND ND 4.39 5/25/2010 17.3 78.3 ND ND 4.35 VEW -1B 4/14/2005 10.4 79.8 ND ND 9.8 5/18/2005 12.6 79.7 ND ND 7.7 6/20/2005 10.2 80.4 ND ND 9.4 7/14/2005 10.8 79.3 ND ND 9.9 8/9/2005 10.3 78.8 ND ND 10.9 9/28/2005 11.2 77.0 ND ND 11.8 10/13/2005 11.0 79.6 ND ND 9.4 2/1/2006 12.9 79.9 ND ND 7.2 5/16/2006 14.2 79.9 ND ND 5.85 8/16/2006 13.7 79.6 ND ND 6.72 12/27/2006 15.0 79.6 ND ND 5.41 3/8/2007 18.2 78.9 ND ND 2.87 6/19/2007 15.9 79.2 ND ND 4.96 9/21/2007 15.8 78.5 ND ND 5.65 12/3/2007 15.8 77.9 ND ND 6.34 3/5/2008 16.5 78.4 ND ND 5.09 5/25/2010 17.3 78.3 ND ND 4.35 Page 1 of 5 TABLE 3 SOIL VAPOR SAMPLING ANALYTICAL DATA (FIXED GASES) 4050 Gosford Road, Bakersfield, California DATE ; Oxygen! 1Vitrogen i :ii1iiii i11iiiiil(%y i iii Methane i . iii i ii ii °rb .. .. Carbon' Mogoxrde Rio ... Carbon; D ox de VEW -2A 4/14/2005 83 80.9 ND ND 10.9 5/18/2005 10.1 803 ND ND 9.5 6/20/2005 7.0 80.9 ND ND 12.2 7/14/2005 8.6 79.6 ND ND 11.8 8/9/2005 7.2 79.1 ND ND 13.6 9/28/2005 16.0 77.5 ND ND 6.4 10/13/2005 9.9 79.5 ND ND 10.6 2/1/2006 12.3 79.7 ND ND 7.9 5/16/2006 14.0 79.6 ND ND 6.39 8/16/2006 13.0 79.5 ND ND 7.51 12/27/2006 14.6 79.4 ND ND 6.06 3/8/2007 15.9 79.0 ND ND 2.97 6/19/2007 15.9 78.7 ND ND 5.39 9/21/2007 15.5 78.2 ND ND 6.36 12/3/2007 16.6 77.9 ND ND 5.44 3/5/2008 16.8 78.0 ND ND 5.21 5/25/2010 17.7 78.4 ND ND 3.88 VEW -2B 4/14/2005 9.1 80.2 ND ND 10.7 5/18/2005 11.2 80.1 ND ND 8.7 6/20/2005 9.7 80.5 ND ND 9.9 7/14/2005 10.5 793 ND ND 10.2 8/9/2005 10.0 78.8 ND ND 11.2 9/28/2005 12.0 77.1 ND ND 10.9 10/13/2005 11.1 79.5 ND ND 9.4 2/1/2006 12.6 79.8 ND ND 7.6 5/16/2006 14.6 79.8 ND ND 5.62 8/16/2006 13.7 79.7 ND ND 6.68 12/27/2006 14.7 79.6 ND ND 5.68 3/8/2007 18.1 78.9 ND ND 2.97 6/19/2007 18.0 78.7 ND ND 3.31 9/21/2007 16.0 78.5 ND ND 5.56 12/3/2007 15.8 78.0 ND ND 6.26 3/5/2008 16.3 783 ND ND 5.33 5/25/2010 16.7 78.3 ND ND 4.98 Page 2 of 5 TABLE SOIL VAPOR SAMPLING ANALYTICAL DATA (FIXED CASES) 4050 Gosford Road, Bakersfield, California DATE. ... ............... s gew......... . ....... - - O . 1 ...:..:I.l.i.: ... t0vn::.:.:.:.:.:.q.:.:.:.:.:.; . . 4C ........... n ....;. Mq6dxi e- bp0 ... .a........r.. a n: o e:::: I . ... ......... . ............ - .............. , VEW-3A 4/14/2005 6.2 81.5 ND ND 12.4 5/18/2005 8.2 80.7 ND ND 11.1 6/20/2005 5.5 81.1 ND ND 13.4 7/14/2005 6.4 79.4 ND ND 14.2 8/9/2005 6.7 78.6 ND ND 14.7 9/28/2005 7.2 76.0 ND ND 16.8 10/13/2005 8.5 78.9 ND ND 12.6 2/1/2006 10.2 79.6 ND ND 10.1 5/16/2006 11.9 79.5 ND ND 8.58 8/16/2006 11.1 79.1 ND ND 9.81 12/27/2006 21.5 77.8 ND ND 0.69 3/8/2007 15.3 78.2 ND ND 6.47 6/19/2007 14.9 78.5 ND ND 6.64 9/21/2007 14.8 77.5 ND ND 7.71 12/3/2007 16.1 77.7 ND ND 6.27 3/5/2008 17.0 77.6 ND ND 5.46 5/25/2010 18.1 78.4 ND ND 3.51 VEW-3B 4/14/2005 8.1 80.6 ND ND 11.3 5/18/2005 9.9 80.4 ND NQ 9.7 6/20/2005 7.9 80.7 NQ ND 11.4 7/14/2005 9.4 79.4 ND ND 11.2 8/9/2005 8.3 79.2 ND ND 12.5 9/28/2005 9.5 76.8 NQ ND 13.7 10/13/2005 10.2 79.4 NQ ND 10.5 2/1/2006 11.6 79.8 NQ NQ 8.6 5/16/2006 13.1 79.8 ND ND 7.06 8/16/2006 12.6 79.4 NQ NQ 8.05 12/27/2006 14.4 79.5 NQ NQ 6.10 3/8/2007 15.7 79.1 ND ND 5.22 6/19/2007 15.0 78.8 NQ ND 6.13 9/21/2007 15.0 78.2 ND ND 6.74 12/3/2007 15.7 77.6 NQ ND 6.72 3/5/2008 16.2 77.9 ND ND 5.86 5/25/2010 1 17.2 1 783 1 ND ND 4.55 Page 3 of 5 TABLE 3 SOIL VAPOR SAMPLING ANALYTICAL DATA (FIXED GASES) 4050 Gosford Road, Bakersfield, California DATE Oxygen Oz) Nitro en: 9 .. aNz). Methane: CHa).: Carbon!Monoxide CO) Carbon Dioxide:? .: z) VEW-4A 4/14/2005 1 MIN 6.9 81.5 ND ND 11.5 4/14/2005 2 MIN 6.8 81.6 ND ND 11.6 4/14/2005 5 MIN 8.0 82.1 ND ND 9.9 5/18/2005 7.8 81.3 ND ND 10.9 6/20/2005 6.8 81.2 ND ND 12.0 7/14/2005 7.8 79.7 ND ND 12.5 8/9/2005 8.5 78.8 ND ND 12.8 9/28/2005 9.8 76.8 ND ND 13.4 10/13/2005 8.8 79.5 ND ND 11.7 2/1/2006 11.0 79.8 ND ND 9.2 5/16/2006 12.8 79.6 ND ND 7.54 8/16/2006 13.0 79.1 ND ND 7.96 12/27/2006 14.2 79.1 ND ND 6.64 3/8/2007 15.1 78.7 ND ND 6.14 6/19/2007 14.7 78.5 ND ND 6.78 9/21/2007 14.4 77.9 ND ND 7.62 12/3/2007 15.9 77.5 ND ND 6.59 3/5/2008 16.3 77.7 ND ND 5.95 5/25/2010 16.7 78.2 ND ND 5.14 VEW-4B 4/14/2005 1 MI 8.6 81.6 ND ND 9.8 4/14/2005 2 MIN 9.5 81.2 ND ND 93 4/14/2005 5 MIN 8.7 81.7 ND ND 9.7 5/18/2005 13.3 80.0 ND ND 6.6 6/20/2005 9.1 81.1 ND ND 9.7 7/14/2005 11.7 79.8 ND ND 8.5 8/9/2005 9.8 79.6 ND ND 10.6 9/28/2005 10.2 77.8 ND ND 12.0 10/13/2005 10.2 803 ND ND 9.5 2/1/2006 12.6 80.2 ND ND 7.1 5/16/2006 13.9 80.1 ND ND 6.07 8/16/2006 13.6 79.9 ND ND 6.51 12/27/2006 14.8 79.7 ND ND 5.47 3/8/2007 15.7 79.4 ND ND 4.93 6/19/2007 15.3 79.1 ND ND 5.62 9/21/2007 15.5 79.1 ND ND 5.46 12/3/2007 15.2 78.2 ND ND 6.53 3/5/2008 16.1 78.5 ND ND 5.42 5/25/2010 16.3 78.6 ND ND 5.06 TABLE 3 SOIL VAPOR SAMPLING ANALYTICAL DATA (FIXED GASES) 4050 Gosford Road, Bakersfield, California DATE Oxygen Nitrogen Methane CHs)..:... Carbon Monoxide CO) CarboaDioxide VEW -5A 4/14/2005 5.7 81.8 ND ND 12.5 5/18/2005 10.0 80.2 ND ND 9.8 6/20/2005 3.3 81.6 ND ND 15.1 7/14/2005 5.8 79.9 ND ND 14.3 8/9/2005 4.5 79.8 ND ND 15.7 9/28/2005 5.2 76.9 ND ND 17.9 10/13/2005 7.7 79.8 ND ND 12.6 2/1/2006 11.8 79.7 ND ND 8.5 5/16/2006 12.9 79.7 ND ND 7.44 8/16/2006 11.4 79.5 ND ND 9.13 12/27/2006 14.0 79.2 ND ND 6.83 3/8/2007 15.3 79.0 ND ND 5.68 6/19/2007 NS NS NS NS NS 9/21/2007 14.6 78.2 ND ND 7.20 12/3/2007 15.2 77.8 ND ND 6.97 3/5/2008 16.1 78.2 ND ND 5.79 5/25/2010 17.7 78.5 ND ND 3.78 VEW -5B 4/14/2005 10.2 80.3 ND ND 9.5 5/18/2005 12.4 79.9 ND ND 7.7 6/20/2005 8.4 80.4 ND ND 11.2 7/14/2005 11.5 79.3 ND ND 9.2 8/9/2005 9.1 79.3 ND ND 11.6 9/28/2005 9.8 77.2 ND ND 13.0 10/13/2005 10.8 79.8 ND ND 9.4 2/1/2006 12.9 79.9 ND ND 7.2 5/16/2006 14.2 79.9 ND ND 5.86 8/16/2006 13.0 79.8 ND ND 7.24 12/27/2006 14.9 79.6 ND ND 5.50 3/8/2007 15.8 79.4 ND ND 4.80 6/19/2007 NS NS NS NS NS 9/21/2007 15.2 78.8 ND ND 6.08 12/3/2007 15.7 78.0 ND ND 6.27 3/5/2008 16.2 78.5 ND ND 5.32 5/25/2010 17.5 78.5 ND ND 3.98 Notes: ND - Not detected above limit noted; NS - not sampled Page 5 of 5 Figures fill a r ,,,a fn. rrsj 1 c'•,:rl • '- `` , I Q :'ii r,;..:; lit pj f l 111 67"T gill A''''' f 1ST •ii li• •iiY T'I Ar'+w 1 % ' I . %I] i' 4` v dy p. ,i. A4, u W I ti `' ,,.rT'_ =1 •Aim... - ,C;. =_ lissr: Mod fs:s jam'- '.- i•`T. ^ t- •r_ -• is. 21 iwhf Uir Sol J, fog r _ ' 1.1 r v - {'''.. i -I FIU'L'_. s,..I 1 flLl I o I ICI! 'I l' , ' ==1,. i•' i III I.. ., t_ . N" IMIN VA wr 9sensrm rr A... rnt flomrm Appendix A City of Bakersfield Fire Department Letter dated May 11, 2010 Ronald J. Fraze Fire Chief Tyler Hartley Douglas Greener Deputy Chiefs HOWARD H. WINES, III DIRECTOR PREVENTION SERVICES 2101 H Street Bakersfield, CA 93301 VOICE: (661) 326 -3979 FAX: (661) 852 -2171 May 11, 2010 Ms. Andrea Wing Shell Oil Products US 20945 S. Willington Carson, CA 90810 R11 (-T IT, 14 _ W_ a 0MAY142010 Bid:......... ..... RE: Underground Storage Tank Clean -up Closure Report 4050 Gosford Road, Bakersfield, California Dear Ms. Wing: This is to inform you that this department has reviewed the result of the Underground Storage Tank Clean-up Low -Risk Closure Soil Conformation Report dated February 25, 2010, prepared by Delta Consultants. As provided by earlier reports, this department had determined that passive remediation did not fully remediate the contaminated soil at the situ, as there was no set levels set for MtBE clean -up to begin with. Therefore, prior to a "no further action" letter being issued the following will need to be completed and submitted to this office for review. A final sampling of the vapor wells (1 -5). A work plan for the removal of the vapor wells. If you have any questions regarding this matter, please contact me at (661) 326 -3979. Sincerely, Craig Perkins R.E.A. REA 1 -000 Hazardous Materials Specialist EQhW:W1r-1_ cc: P. Gilchrist REA, Delta Consultants J. Whiting, RWQCB Appendix B — Field Data Sheets Reports and Chain -of- Custody Documentation Le/science nvironmental Laboratories, Inc. June 09, 2010 Phil Gilchrist Delta Environmental Consultants, Inc. 911 South Primrose Avenue, Unit K Monrovia, CA 91016 -8403 Subject: Calscience Work Order No.: Client Reference: Dear Client: Page 1 of 15 ACCOq 9 o JAI.,a = 10 -05 -2007 4050 Gosford Rd., Bakersfield, CA Enclosed is an analytical report for the above - referenced project. The samples included in this report were received 5/26/2010 and analyzed in accordance with the attached chain -of- custody. Unless otherwise noted, all analytical testing was accomplished in accordance with the guidelines established in our Quality Systems Manual, applicable standard operating procedures, and other related documentation. The original report of subcontracted analysis, if any, is provided herein, and follows the standard Calscience data package. The results in this analytical report are limited to the samples tested and any reproduction thereof must be made in its entirety. If you have any questions regarding this report, please do not hesitate to contact the undersigned. Sincerely, 1, i Calscience Environmental Laboratories, Inc. Xuan Dang Project Manager CA -ELAP ID: 1230 0 NELAP ID: 03220CA 0 CSDLAC ID: 10109 0 SCAQMD ID: 93LA0830 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 • FAX: (714) 894 -7501 Page 2 of 15 a /science \IGC tty A C C0,90 nvironmental Analytical Report aboratories, Inc, z u L Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: ASTM D -1946 Units: %V Project: 4050 Gosford Rd., Bakersfield, CA Page 1 of 2 Lab Sample Date/Time Date Date/Time Client Sample Number Number Collected matrix instrument Prepared Analyzed u, rsatcn " VE -1A 10 -05- 2007 -1 -B 05/25/10 Air GC 34 N/A 05/26/10 100526L01 13:00 16:22 Parameter Result RL DF Qual Parameter Result RL DF Qual Methane ND 0.500 1 Oxygen +Argon 17.4 0.500 1 Carbon Dioxide 4.27 0.500 1 Nitrogen 78.3 0.500 1 Carbon Monoxide ND 0.500 1 VE -1B 10 -05- 2007 -2 -13 05/25/10 Air GC 34 N/A 05126/10 1005261-01 13:18 16:56 Parameter Result R Df Parameter Result RL DF Qual Methane ND 0.500 1 Oxygen + Argon 17.3 0.500 1 Carbon Dioxide 4.35 0.500 1 Nitrogen 78.3 0.500 1 Carbon Monoxide ND 0.500 1 VE -2A 10 -05- 2007 -3 -B 05/25/10 Air GC 34 N/A 05/26110 100526L01 13:30 17:29 Parameter Result RL DF Qual Parameter Result RL DF Qua] Methane ND 0.500 1 Oxygen + Argon 17.7 0.500 1 Carbon Dioxide 3.88 0.500 1 Nitrogen 78.4 0.500 1 Carbon Monoxide ND 0.500 1 VE -2B 10 -06- 2007-4-13 05/25/10 Air GC 34 N/A 05/26/10 100526L01 13:42 18:03 arameter Result R a Qual Parameter Result R DF Qual Methane ND 0.500 1 Oxygen + Argon 16.7 0.500 1 Carbon Dioxide 4.98 0.500 1 Nitrogen 78.3 0.500 1 Carbon Monoxide ND 0.500 1 Carbon Monoxide VE -3A 10 -05- 2007 -5-B 05/25/10 Air GC 34 N/A 05/26/10 100526L01 14:05 18:36 Parameter Result RL DF Qual Parameter Re ul RL DF Qual Methane ND 0.500 1 Oxygen + Argon 18.1 0.500 1 Carbon Dioxide 3.51 0.500 1 Nitrogen 78.4 0.500 1 Carbon Monoxide ND 0.500 1 VE -3113 10- 05- 2007 -6 -B 05/25/10 Air GC 34 N/A 05/26/10 1005261-01 14:15 19:21 Parameter Resu RL DF Qual Parameter Resul R DF Qua1 Methane ND 0.500 1 Oxygen + Argon 17.2 0.500 1 Carbon Dioxide 4.55 0.500 1 Nitrogen 78.3 0.500 1 Carbon Monoxide ND 0.500 1 RL - Reporting Limit , DF - Dilution Factor , Qual - Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 TS alscience A= nvironmental A. aboratories, Inc. Analytical Report Page 3 of 15 10O \ N ACC0g0920 U I I( 1I 1 Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: ASTM D -1946 Units: %V Project: 4050 Gosford Rd., Bakersfield, CA Page 2 of 2 Lab Sample Daterrime Date Date/Time Client Sample Number Number Collected Matrix Instrument Prepared Analyzed QC watch iD VEDA 10 -05- 2007 -7 -B 05/25/10 Air GC 34 N/A 05/26/10 1005261-01 14:30 19:56 Parameter Resu RL DF Qual Parameter Re ul RL DF Qual Methane ND 0.500 1 Oxygen + Argon 16.7 0.500 1 Carbon Dioxide 5.14 0.500 1 Nitrogen 78.2 0.500 1 Carbon Monoxide ND 0.500 1 VE -4B 10 -05- 2007 -8 -B 05/25/10 Air GC 34 N/A 05/26/10 100526L01 14:43 20:45 Paramete Resul RL DF Chi Parameter R sul RI. PIE Qual Methane ND 0.500 1 Oxygen + Argon 16.3 0.500 1 Carbon Dioxide 5.06 0.500 1 Nitrogen 78.6 0.500 1 Carbon Monoxide ND 0.500 1 VE-5A 10 -05- 2007 -9-B 05/25/10 Air GC 34 N/A 05/26/10 100526L01 15:00 21:26 Parameter Result RL DF Qual Parameter Result RL DF Qual Methane ND 0.500 1 Oxygen + Argon 17.7 0.500 1 Carbon Dioxide 3.78 0.500 1 Nitrogen 78.5 0.500 1 Carbon Monoxide ND 0.500 1 VE -5B 10 -05- 2007 -10 -A 05/25/10 Air GC 34 N/A 05/26/10 1005261-01 15:15 22:00 Parameter Res I RL Qf LW.?J Parameter Re ul RL DF Qua1 Methane ND 0.500 1 Oxygen + Argon 17.5 0.500 1 Carbon Dioxide 3.98 0.500 1 Nitrogen 78.5 0.500 1 Carbon Monoxide ND 0.500 1 Method Blank 099 -03 -002 -1,058 N/A Air GC 34 N/A 05/26/10 1005261-01 08:53 Parameter Result RL DF Qual Parameter Result RL DF Qual Methane ND 0.500 1 Oxygen + Argon ND 0.500 1 Carbon Dioxide ND 0.500 1 Nitrogen ND 0.500 1 Carbon Monoxide ND 0.500 1 RL - Reporting Limit DF - Dilution Factor Qual - Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 alscience nvironmental aboratories, Inc. Delta Environmental Consultants, Inc. 911 South Primrose Avenue, Unit K Monrovia, CA 91016 -8403 Project: 4050 Gosford Rd., Bakersfield, CA Analytical Report Date Received: Work Order No: Preparation: Method: Page 4 of 15 ro N NCC09Q4 O e r- 05/26/10 10 -05 -2007 N/A EPA TO -3M Page 1 of 2 Lab Sample Daterrime Date Daterrime ^^ Client Sample Number Number Collected matrix instrument Prepared Analyzed W. --I — FE-1A 10-05- 2007 -1 -A 05/25/10 Air GC 13 N/A 05/26/10 1005261-01 13:00 14:30 Ir Result RL DF Qual Units 3asoline ND 1.5 1 ppm MV) VE -113 10- 05- 2007 -2 -A 05/25/10 Air GC 13 N/A 05/26/10 1005261-01 13:18 14:41 Parameter Result RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v/v) VE -2A 10 -05-2007 -3 -A 05/25/10 Air GC 13 N/A 05/26/10 1005261-01 13:30 14:51 Parameter Resul RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v /v) VE -213 10 -05- 2007 -4-A 05/ 5110 Air GC 13 N/A 05/26/10 1005261-01 13? :42 15:00 Parameter Result RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v /v) VE -3A 10 -05- 2007 -5-A 05/25/g0 Air GC 13 N/A 05/26/10 1005261-01 14:05 15:10 Parameter Result RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v/v) VE -313 10 -05- 2007 -6 -A 05/25/10 Air GC 13 N/A 05/26/10 100526L01 14:15 15:19 Parameter Result $6 DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v /v) RL - Reporting Limit DF - Dilution Factor Qual - Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 Page 5 of 15 T alscience o N AccD9O -141 nvironmental Analytical Report Q Q; Cj aboratories, Inc. Q L Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -3M Project: 4050 Gosford Rd., Bakersfield, CA Page 2 of 2 Lab Sample Datelrime Date Date/Time Client Sample Number Number Collected Matrix instrument Prepared Anaiyzed Wl, DaLC" !L; FE-4A 10 -05- 2007 -7 -A 05/25/10 Air GC 13 N/A 05/26/10 1005261-01 14:30 15:29 Parameter Result RL DF Qua[ Units TPH as Gasoline ND 1.5 1 ppm (v /v) VE -4B 10 -05- 2007 -8 -A 05/25/10 Air GC 13 N/A 05/26/10 1005261-01 14:43 15:38 Parameter Result RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v/v) VE -5A 10 -05- 2007 -9 -A 05/25/10 Air GC 13 N/A 05/26/10 1005261-01 15:00 15:48 Parameter Resu RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v /v) VE -5B 10 -05- 2007 -10 -A 05/25/10 Air GC 13 N/A 05/26/10 100526L01 15:15 15:57 Parameter Result RL DF Qua[ Units TPH as Gasoline ND 1.5 1 ppm (v/v) Method Blank 098 -01 -005 -2,323 N/A Air GC 13 N/A 05/26/10 100526L01 08:41 Parameter Resul RL DF Qual Units TPH as Gasoline ND 1.5 1 ppm (v/v) RL - Reporting Limit , DF - Dilution Factor , Qual - Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 alscience nvironmental L aboratories, Inc. Analytical Report Page 6 of 15 O \ tA ACCO O 1 0n U Result RL DF Qua/ Paramete r Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -15M Units: ug /L Project: 4050 Gosford Rd., Bakersfield, CA Page 1 of 4 Lab Sample Dateffime Date Datefrime nn ^.o., i....a......... !1(` Ro4rh IrliientsampleNumberNumberCollected "' °"'^ 1"OL-111— Prepared rinaiyzed VE -1A 10 -05- 2007 -1 -A 05/25/10 Air GC /MS K N/A 05/26/10 1005261-01 13:00 21:01 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Result RL DF Qua/ Paramete r Result R a Qual Benzene ND 0.0016 1 Tert-Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.010 0.0072 1 Qual Surrogates: REC °o Control Surrogates: REC M Control Qual Surrogates: REC % Control Qual 1,4- Bromofluorobenzene 94 57 -129 Lim' s 1,2- Dichloroethane -d4 97 47 -137 Limits Toluene -l8 1,4- Bromofluorobenzene 100 57 -129 1,2- Dichloroethane -d4 95 47 -137 Toluene -d8 91 78 -156 VE -1B 10 -05- 2007 -2 -A 05/25/10 Air GC /MS K N/A 05/26/10 100526L01 13:18 21:48 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Resul RL DF Qual Parameter Result RL DF Qual Benzene ND 0.0016 1 Tert-Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.0091 0.0072 1 Qual Surrogates: REC °o Control Surrogates: REC M Control Qual Surrogates: REC M) Control Qual 1,4- Bromofluorobenzene 94 57 -129 Limits 1,2- Dichloroethane -d4 97 47 -137 lb2h Toluene -l8 1,4- Bromofluorobenzene 95 57 -129 1,2- Dichloroethane -d4 97 47 -137 Toluene -d8 92 78-156 VE -2A 10 -05- 2007 -3 -A 05/25/10 Air GC /MS K N/A 05/26110 1005261_01 13:30 22:35 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Result RL DF Qual Parameter Result RL DF Qual Benzene ND 0.0016 1 Tert-Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.012 0.0072 1 Surrogates: REC M Control Qual Surrogates: REC °o Control Qual Ibib Limits 1,4- Bromofluorobenzene 94 57 -129 1,2- Dichloroethane -d4 97 47 -137 Toluene -l8 96 78-156 RL - Reporting Limit , DF - Dilution Factor , Qual -Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 alscience nvironmental L aboratories, Inc. Analytical Report Page 7 of 15 A C C 0,9 U "{ Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -15M Units: ug /L Project: 4050 Gosford Rd., Bakersfield, CA Page 2 of 4 Lab Sample Date/rime Date Datelrime lient Sample Number Number Collected Niauuc instrument Prepared Analyzed Q Batch VE -2B 10 -05- 2007.4 -A 05/25/10 Air GC /MS K N/A 05126110 1005261-01 13:42 23:24 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Parameter ResuR RL DF Qual Parameter Resul RL DF Qgpj Benzene ND 0.0016 1 Tert- Butyi Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) ND 0.0072 1 Qual Surrogates: REC ( %) Control Qual Surrogates: REC ° Control Qual Surrogates: REC M Control Qual 57 -129 Limi s Limits 125 47 -137 Lbib Limits 1,4- Bromofluorobenzene 1,4- Bromofluorobenzene 97 57 -129 1,2- Dichloroethane -d4 1,2- Dichloroethane -d4 97 47 -137 Toluene -t8 Toluene -d8 91 78 -156 VE -3A 10 -05- 2007 -5-A 05/25/10 Air GC /MS K N/A 05/27110 1005261-01 14:05 00:14 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Parameter Result RL DF Qual Parameter Resul RL DF Qual Benzene 0.0017 0.0016 1 Tert-Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene 0.0055 0.0022 1 Ethyi -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) 0.024 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.013 0.0072 1 Qual Surrogates: REC ( %) Control Qual Surrogates: REC ( %) Control Q9?1 Surrogates: REC M Control Qual 104 57 -129 Limi s 1,2- Dichloroethane -d4 125 47 -137 Lbib 104 1,4- Bromofluorobenzene 97 57 -129 1,2- Dichloroethane -d4 98 47 -137 Toluene -t8 89 78 -156 VE -3B 10 -05- 2007 -6 -A 05/25/10 Air GC /MS K N/A 05/27/10 1005261-01 14:15 01:01 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter R su RL DF Qual Parameter Result R DF Qual Benzene ND 0.0016 1 Tert-Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyi Ether (TAME) ND 0.0084 1 Methyl- t -Butyi Ether (MTBE) 3.3 0.12 16 Surrogates: REC (%) Control Qual Surrogates: REC ( %) Control Qual limits Limits 1,4- Bromofluorobenzene 104 57 -129 1,2- Dichloroethane -d4 125 47 -137 Toluene -d8 104 78-156 UPUIuny unut , yr v u unauunracwiwudl - utuaais 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 Page 8 of 15 L. alscience O N ACC 09p nvironmental Analytical Report aboratories, Inc.i l Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -15M Units: ug /L Project: 4050 Gosford Rd., Bakersfield, CA Page 3 of 4 Lab Sample Date/Time Date Date/Time lient Sample Number Number Collected matrix instrument prepared Analyzed QC Batch iu VE -4A 10- 05- 2007 -7 -A 05/25/10 Air GC /MS K N/A 05/27/10 1005261_01 14:30 02:34 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Resu R DF Qua1 Parameter Result R DF Qual Benzene ND 0.0016 1 Tert -Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert - Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.0090 0.0072 1 Qual Surrogates: REC (%) Control Surrogates: REC ( %) Control Qu l Surrogates: REC (%) Control Qual 1,4- Bromofluorobenzene 98 57 -129 Limb 1,2- Dichloroethane -d4 95 47 -137 Limits Toluene -d8 1,4- Bromofluorobenzene 100 57 -129 1,2- Dichloroethane -d4 97 47 -137 Toluene -d8 89 78 -156 VE-4B 10- 05- 2007 -8 -A 05/25/10 Air GC /MS K N/A 05/27/10 1005261_01 14:43 03:20 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Result RL DF Qual Parameter Resu RL DF Qual Benzene 0.0018 0.0016 1 Tert -Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene 0.0030 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert -Amyl- Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) ND 0.0072 1 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.0088 Surrogates: REC ( %) Control Qual Surrogates: REC (%) Control Chi l REC (%) Limits Qual Surrogates: REC (%) Limits Qu I 1,4- Bromofluorobenzene 98 57 -129 Limits 1,2- Dichloroethane -d4 95 47 -137 Limits Toluene -d8 90 78 -156 98 57 -129 1,2- Dichloroethane -d4 95 VE -5A 10- 05- 2007 -9 -A 05/25/10 Air GC /MS K N/A 05/27/10 1005261-01 15:00 04:07 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Parameter Result RL DF Qual Parameter Resu RL DF Qual Benzene ND 0.0016 1 Tert -Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) 0.0088 0.0072 1 Surrogates: REC (%) Control Qual Surrogates: REC (%) Control Qu I Limits Limits 1,4- Bromofluorobenzene 98 57 -129 1,2- Dichloroethane -d4 95 47 -137 Toluene -d8 90 78 -156 RL - Reporting Limit , DF - Dilution Factor , Qual - Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 • FAX: (714) 894 -7501 as U alscience nvironmental Analytical Report Page 9 of 15 o aboratories, Inc. L ` Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -15M Units: ug /L Project: 4050 Gosford Rd., Bakersfield, CA Page 4 of 4 Lab Sample Daterrime Date Date/Time lient Sample Number Number Collected matrix instrument prepared Analyzed WU Daum J VE -5B 10 -05- 2007 -10 -A 05/25/10 Air GC /MS K N/A 05/27/10 100526L01 15:15 04:55 Comment(s): -The method has been modified to use Tedlar bags instead of Summa Canisters. Result R Benzene Parameter Result EL p LWal Parameter Resul RL DF (emu Benzene ND 0.0016 1 Tert -Butyl Alcohol (TBA) ND 0.015 1 Toluene ND 0.019 1 Diisopropyl Ether (DIPE) ND 0.0084 1 Ethylbenzene ND 0.0022 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 Xylenes (total) ND 0.0087 1 Tert- Amyl - Methyl Ether (TAME) ND 0.0084 1 Methyl -t -Butyl Ether (MTBE) ND 0.0072 1 98 47 -137 Surrogates: REC % Control gy,1j Surrogates: REC ( %) Control Qu I ti -ktim-k Limits 1,4- Bromofluorobenzene 98 57 -129 1,2- Dichloroethane -d4 97 47 -137 Toluene -d8 91 78 -156 Method Blank 099 -12- 983 -729 N/A Air GC /MS K N/A 05/26/10 100526L01 14:06 Parameter Result R Benzene ND 0.0016 Toluene ND 0.019 Ethylbenzene ND 0.0022 Xylenes (total) ND 0.0087 Methyl -t -Butyl Ether (MTBE) ND 0.0072 Surrogates: REC ( %) Control Tert - Amyl - Methyl Ether (TAME) ND Limits 1,4- Bromofluorobenzene 97 57 -129 Toluene -d8 103 78 -156 DF Qu ll Parameter Result RL DF Qual 1 Tert -Butyl Alcohol (TBA) ND 0.015 1 1 Diisopropyl Ether (DIPE) ND 0.0084 1 1 Ethyl -t -Butyl Ether (ETBE) ND 0.0084 1 1 Tert - Amyl - Methyl Ether (TAME) ND 0.0084 1 1 ual Surrogates: REC ft Control Qual Limits 1,2- Dichloroethane -d4 98 47 -137 RL - Reporting Limit DF - Dilution Factor Qual - Qualifiers 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 FAX: (714) 894 -7501 j lscience nvironmental a aboratories, Inc. Quality Control - Duplicate Page 10 of 15 N ACC 0,90 U L Lj Delta Environmental Consultants, Inc. Date Received: 05/26/10 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -3M Project: 4050 Gosford Rd., Bakersfield, CA Date Date Duplicate Batch Quality Control Sample ID Matrix Instrument Prepared: Analyzed: Number 10 -05- 2003 -12 Air GC 13 N/A 05/26/10 100526D01 Parameter Sample Conc DUP Conc RPD RPD CL Qualifiers TPH as Gasoline 34 35 2 0 -20 RPD - Relative Percent Difference , CL - Control Limit 7440 Lincoln Way, Garden Grove, CA 92841 -1427 . TEL:(714) 895 -5494 - FAX: (714) 894 -7501 Page 11 of 15 alscience N A C C (),go9 Znvironmental Quality Control - LCS /LCS Duplicate v 1tJl ,,I r AL aboratories, Inc. s Delta Environmental Consultants, Inc. Date Received: N/A 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: ASTM D -1946 Project: 4050 Gosford Rd., Bakersfield, CA Date Date LCS /LCSD Batch Quality Control Sample ID Matrix Instrument Prepared Analyzed Number 099 -03 -002 -1,058 Air GC 34 N/A 05/26/10 1005261-01 Parameter LCS %REC LCSD %REC %REC CL RPD RPD CL Qualifiers Carbon Dioxide 99 98 80 -120 1 0 -30 Oxygen + Argon 103 102 80 -120 0 0 -30 Nitrogen 105 105 80 -120 0 0 -30 RPD - Relative Percent Difference , CL - Control Limit 7440 Lincoln Way, Garden Grove, CA 92841 -1427 . TEL:(714) 895 -5494 . FAX: (714) 894 -7501 science anvironmental Aw aboratories, Inc. Quality Control - LCS /LCS Duplicate Page 12 of 15 N ACC0,9 Q Delta Environmental Consultants, Inc. Date Received: N/A 911 South Primrose Avenue, Unit K Work Order No: 10 -05 -2007 Monrovia, CA 91016 -8403 Preparation: N/A Method: EPA TO -15M Project: 4050 Gosford Rd., Bakersfield, CA Quality Control Sample ID Matrix Date Instrument Prepared Date Analyzed LCS /LCSD Batch Number Fo-99-12-983-729 Air GC /MS K N/A 05/26/10 1005261-01 Parameter LCS %REC LCSD %REC REC CL RPD RPD CL Qualifiers Benzene 86 107 60 -156 22 0-40 Toluene 86 105 56 -146 20 0-43 Ethylbenzene 88 109 52 -154 20 0 -38 p /m- Xylene 88 107 42 -156 19 0-41 o- Xylene 90 107 52 -148 18 0 -38 RPD - Relative Percent Difference , CL - Control Limit 7440 Lincoln Way, Garden Grove, CA 92841 -1427 . TEL:(714) 895 -5494. FAX: (714) 894 -7501 Page 13 of 15 alscience A o 90 nvironmental Glossary of Terms and Qualifiers 11 Aw aboratories, Inc. Work Order Number: 10 -05 -2007 Qualifier Definition See applicable analysis comment. Less than the indicated value. Greater than the indicated value. 1 Surrogate compound recovery was out of control due to a required sample dilution, therefore, the sample data was reported without further clarification. 2 Surrogate compound recovery was out of control due to matrix interference. The associated method blank surrogate spike compound was in control and, therefore, the sample data was reported without further clarification. 3 Recovery of the Matrix Spike (MS) or Matrix Spike Duplicate (MSD) compound was out of control due to matrix interference. The associated LCS and /or LCSD was in control and, therefore, the sample data was reported without further clarification. 4 The MS /MSD RPD was out of control due to matrix interference. The LCS /LCSD RPD was in control and, therefore, the sample data was reported without further clarification. 5 The PDS /PDSD or PES /PESD associated with this batch of samples was out of control due to a matrix interference effect. The associated batch LCS /LCSD was in control and, hence, the associated sample data was reported without further clarification. B Analyte was present in the associated method blank. E Concentration exceeds the calibration range. J Analyte was detected at a concentration below the reporting limit and above the laboratory method detection limit. Reported value is estimated. ME LCS Recovery Percentage is within LCS ME Control Limit range. ND Parameter not detected at the indicated reporting limit. Q Spike recovery and RPD control limits do not apply resulting from the parameter concentration in the sample exceeding the spike concentration by a factor of four or greater. X % Recovery and /or RPD out -of- range. Z Analyte presence was not confirmed by second column or GC /MS analysis. Solid - Unless otherwise indicated, solid sample data is reported on a wet weight basis, not corrected for % moisture. 7440 Lincoln Way, Garden Grove, CA 92841 -1427 • TEL:(714) 895 -5494 • FAX: (714) 894 -7501 UW (LOCATION) Shell Oil Products Chain Of Custody Record 91 CA.SaERM OSPL................................................... 0 XENW ENV. WMAREIAM !Ei;. Phil Gilchrist 91 71 31 31 71 2 r.... .. .. .r. DATE 4M o MTIVA SD&CM CONSULTANT CUBES . ....... . TATNO= W) PAGE of anim WU MEME 100THER _ 1 1 22 LLl 11 21 221 441SAMKM00WkiWMLL1 MCIAL"I"I.: Delta Consultants 44050 Gosford Road, Bakersfield C 15b" M AWRE= WWFDEUVERAMTOCN— 0il I,. O L..S.* FFAVIL 911 S. Primrose Ave., Monrovia CA 11gmdnftdeftaew,oDm ISCA4050GIDPROECTCONTACT &Wdmmw PWPhp b* JJoyce Gavin Lia Cotero I626.266.6662 WWeroageft nv.com Phil GlIchrisi; %V1111am Lartz SSAMIL" KAAMW Mdr* - kq#0 TEUD"OKE FFAk ii% iii.: i 626256.6662 6628 256.828 yAant7QdR1tRA"V MM TURNAROUND TIME (CAi.EN RDAYS): RESULTS NEEDED RREQUESTED ANALYSISGU24H LA - RWQM REPORTRAX&T UST AGENCY: siELLaxffRAc-T RATE AwLiES aa TTEMPERATURE ON RECEIPTC' SPECIAL INSTRUCTIONS OR NOTES: DDSTATE RE114MRSE14ENTRATEAPPUES Pleaseprovide report in ppb and ug/L F EDD MDTMEMO AA XX0 FA RECEIPT VERIFICATMN REQUESTED mm CC4 L'L SAMPLING CPRESERVATIVEccoC-4 Field Sample IdentWication C-4 C4 Uj tu yj 0No. or IL M ContainerPID ReadingsEii9DATEkkorLaboratory 2 ' au 2- ot : ; I I kolas FM3 NOW OTIKER I X X X ASTM IM W oxygeni:T*i VE-IA 113. 0* vapor 1 2 I.. '. X X X n1bogen, methaneVE-1B 13:13 Vepw VE - 2A V 2 X X X carbon dioxide, and X I X x carbon monoxide ra NINE rm Even 1M.- NEW go on I, mulm 0— LWX — sXp 0 /0--'00 Dtic The DrOC n CD Tk= 0 05r2W R.W. Cil ra NINE rm Even 1M.- NEW go on I, mulm 0— LWX — sXp 0 /0--'00 Dtic The DrOC n CD Tk= 0 05r2W R.W. Cil 0— LWX — sXp 0 /0--'00 Dtic The DrOC n CD Tk= 0 05r2W R.W. Cil Styw:aroamnM!erdaI CLIENT: Page 15 of 15 WORK ORDER #: 10-05- ® M IN Cooler O of C) DATE: OJT loVW 10 TEMPERATURE: Thermometer ID: SCI (Criteria: 0.0 °C — 6.0 °C, not frozen) Temperature °C + 0.5 °C (CF) =_9 OC Blank Sample Sample(s) outside temperature criteria (PM /APM contacted by: . Sample(s) outside temperature criteria but received on ice /chilled on same day of sampling. Received at ambient temperature, placed on ice for transport by Courier. Ambient Temperature Air Filter Metals Only PCBs Only Initial: CUSTODY SEALS INTACT: Cooler No (Not Intact) Not Present N/A Initial: Sample No (Not Intact) ZNot Present Initial: bib- SAMPLE CONDITION: Yes No N/A Chain -Of- Custody (COC) document(s) received with samples ................... COC document(s) received complete .................... ............................... JZ/ Collection date /time, matrix, and /or # of containers logged in based on sample labels. No analysis requested. Not relinquished. No datettime relinquished. Sampler's name indicated on COC ...................... ............................... Sample container label(s) consistent with COC ...... ............................... Ir Sample container(s) intact and good condition ....... ............................... Zr Proper containers and sufficient volume for analyses requested ............... Er Analyses received within holding time .................. ............................... e pH / Residual Chlorine / Dissolved Sulfide received within 24 hours........... Proper preservation noted on COC or sample container .......................... Unpreserved vials received for Volatiles analysis Volatile analysis container(s) free of headspace ...... ............................... 01 Tedlar bag(s) free of condensaiiion ....................... ............................... fa' CONTAINER TYPE: Solid: 4oZCGJ 08ozCGJ 016ozCGJ Sleeve ( EnCorese TerraCorese Water: VOA VOAh 0VOAna2 0125AGB 0125AGBh 0125AGBp 01AGB 01AGBna2 1AGBs 0500AGB 500AGJ 0500AGJs 250AGB 0250CGB 0250CGBs 01PB 0500PB 500PBna 0250PB 250PBn 0125PB 0125PBznna 0100PJ 100PJna2 Air: l/Tedlar® Summa® Other: Trip Blank Lot#: Labeled /Checked by: h V Container: C. Clear A: Amber P: Plastic G: Glass J: Jar B: Bottle Z: Ziploc/Resealable Bag E: Envelope Reviewed by: Preservative: h: HCL n: HNO3 na2:Na2S203 na: NaOH p: 1-131304 s: H2SO4 znna: ZnAc2 +NaOH f: Field - filtered Scanned by: 6` L SOPT100_090 (05110/10) Appendix D — Vapor Well Boring logs and Well Construction Diagrams 1 i BORING LOG Drill Rig: CME-85 Date DdIled: 9/25/03 Logged By: Boring Dia: 10 Inches Boring Number VEW-1 Ryan Nunneley CL Blow Counts Completion Depth Feet Lithology Concrete Silty Sand (SM) grayish brown, very fine-fine grained sand, poorly graded, moderately micaceous, moist no odor, 0 ppm 10 micaceous, moist no odor, 0 ppm 6-7-9 Sandy Silt (ML) medium brown, nonplastic, very fine grained sand, very micaceous, very moist, slight odor, 163 PPM SandTSP),- li t brownish gray, very fine-fine grained sand, 25 Silty gand (9'M) j ediurF bro%F veri fine ined sand poorly graded, nonplastic, moist moderate odor, 196 ppm 19-23-24 35 Sand (SP) - light grayish brown, very fine-fine grained sand, poorly graded, very micaceous, damp, strong odor, 1643 ppm 18-31-34 40 Sand (SP) - light reddish brown, very fine grained sand, poorly graded, very micaceous, damp, strong odor, 1442 PPM well graded, very micaceous, moist moderate odor, 164 ppm 19-22-28 50 grained sand, moderately micaceous, very moist no odor, 0 ppm 24 SandTSW) - light Frown, fine-cFarse grainea sand, well graded, very micaceous, damp, no odor, 0 ppm Completion Notes: Site: VEW-1 is nested with two 2" wags. VEW-1A is screened with 20 feet of schedule40 PVC, 0.020" slotted screen from 10 feet to 30 feet bekyw grade. 10 feet to surface is blank schedule 40 PVC. Texaco Service Station VEW- 1 B is screened with 15 feet of schedule 40 PVC, 0.020" slotted screen from 40 feet to 55 feet below grade. 40 feet to surface is blank schedule 40 PVC. Annular spaced backfifled with sand 4050 Gosford Road a] depth to 37 feet bentonite sea] placed from 37 feet to 33 feet annular space backfilled with sand from 33 feet to 8 feet bentonite seal placed from 8 feet to I foot below grade, 12-inch Bakersfield, CA 93309 diameter well box set in concrete from I foot to surface. Project No.: 423.EQL.00 Page 1 I V-31,76-3R.1- BORING LOG t— ELk-7— Drill Rig: CME-85 Date Drilled: 9/24/03 Logged By: Boring Dia: 10 Inches Boring Number VEW-2 Ryan Nunneley CL E M Blow Counts Completion Depth Feet Lithology Description Concrete Sand (SP) - grayish brown, very fine-fine grained sand, poorly graded, slightly silly, very micaceous, moist, slight Y odor, 25 pprn Sandy Clay (CL) dark brown, medium plasticity, very fine 2-4-5 grained sand, very micaceous, very moist slight odor, 136 ppm 6-&10 15 Clayey Sand (SC) - medium brown, very fine grained sand, poorly graded, nonplastic, slightly micaceous, moist, strong odor, 773 ppm 12-29-32 20 Sand (SP) -light grayish brown, very fine grianed sand, poorly graded, slightly silty, very micaceous, moist, strong 19-31-50 25 drained sand, moderately micaceous, moist, strong odor, 9G4 PPM Sand (SP) - light brown, very fine grained, poorly graded, Sand (SP) - light grayish brown, very fine-medium grained 19-30-38 35 sand, poorly graded, trace gravel to 1/4", very micaceous, damp, moderate odor, 359 pprn 24-32-48 40 Sand (SP) - reddish brown, very fine grained sand, poorly graded, moderately micaceous, damp, strong odor, 676 pprn Sand (SW) - light gray, very fine-medium grained sand, well graded, very micaceous, damp, slight odor, 185 ppm 13-25-32 50 sand, moderately micaceous, moist slight odor, 67 ppm 26-3241 55 Sand (SVV) - light brownish gray, very fine-coarse grained sand, well graded, very micaceous, moist, no odor, 0 ppm Completion Notes: Site: VEW-2 is nested with two r wei[s. VEW-2A is screened with 25 feet of schedule 40 PVC, 0'020" slotted screen from 5 feet to 30 feet below grade. 5 feet to surface is blank schedule 40 PVC. VEW-2B is screened with 20 feet of schedule 40 PVC, 0.020" slotted screen from 40 feet to 60feet below grade. 40 feet to surface is blank schedule 40 PVC. AnnuW spaced backfilled with sand Texaco Service Station 4050 Gosford Road from total depth to 37 feet bentonite seal placed from 37 feet to 33 feet annular space backfilled with sand from 33 feet to 3 feet, bentonite seal placed from 3 feet to 1 foot below grade, 12-inch Bakersfield, CA 93309 diameter well box set in concrete from I That to surface. i i NNIR t LIrIP ukh -s 7xar,. Blow E Completion c1 Counts U) Drill Rig: CME -85 Boring Dia: 10 Inches Depth LithologyFeet 5 4 -6 -12 Texaco Service Stationslottedscreenfrom5feetto. 25 feet below grade. 5 feet to surface is blank schedule 40 PVC. 10 VEW =35 is screened with 15 feet of schedule 40 PVC, 0.020' slotted screen from 35 feet to 50 feet 10 -15-22 below grade. 35 feet to surface is blank schedule 40 PVC. Annular spaced backfitled with sand 15 Bakersfield, CA 93309withsandfrom28feetto3feet, bentonite seal placed from 3 feet to 1 foot below grade, 12 -Inch diameter well box set in concrete from 1 foot to surface. v.- F- F- 16-26-29 20 9 .. a p:. 9 9:. 9.. P.. 9: 43-50 25 P:: 9:9 P:d q:: P:: p: r: 9:: 9:: y:: ff.: 9:, 27 -36-42 30 16 -23-38 35 20- 30-37 40 9 . .9 . 9 .P'-0 21 -21 -23 45 21 -32 -38 50 55 60 65 BORING LOG Date Drilled: 9/24/03 Logged By: Boring Number. VEW -3 Ryan Nunneley Description hcrete nd (SP) - right brown, very fine grained sand, poorly Ided, very micaceous, moist, no odor, 0 ppm Sandy Clay (CL) - dark brown, low cityplasti, very fine grained sand, slightly micaceous, moist, moderate odor, 372 ppm Sand (SP) - medium brown, very fine grained sand, poorly graded, slightly clayey, slightly micaceous, moist, strong odor, 2156 ppm Silty Sand (SM) - brownish gray, very fine -fine sand, poorly graded, nonplastic, very moist, strong odor, 732 ppm Silty Sand (SM) - light grayish brown, very fine grained sand, poorly graded, nonplastic, moist, strong odor, 4000+ ppm Sand (SP) - light gray, very fine -fine grained sand, poorly graded, very micaceous, damp, strong odor, 582 ppm Sand (SP) - light gray, very fine -fine grained sand, poorly graded, very micaceous, damp, strong odor, 4000+ ppm Clayey Sand (SC) - medium brown, very fine grained sand, poorly graded, nonplastic, very micaceous, moist, strong odor, 1640 ppm Sand (SW) - light brown, fine - coarse grained sand, well graded,.very micaceous, damp, no odor, 0 p2m _ Sandy Silt (ML) - medium gray, nonplastic, very fine grained sand, slightly clayey, very micaceous, very moist, no odor, 0 ppm - - - -- / Clayey Sand (SC) - medium brown, very fine -fine grained sand, poorly graded, nonplastic, very micaceous, very moist, no0dor_OpP _ _ — _ _ _ Completion Notes: I Site: VEW -3 is nested with two 2- wells. VEW -3A is screened with 20 feet of schedule 40 PVC, 0.020' Texaco Service Stationslottedscreenfrom5feetto. 25 feet below grade. 5 feet to surface is blank schedule 40 PVC. VEW =35 is screened with 15 feet of schedule 40 PVC, 0.020' slotted screen from 35 feet to 50 feet 4050 Gosford Roadbelowgrade. 35 feet to surface is blank schedule 40 PVC. Annular spaced backfitled with sand from total depth to 32 feet, bentonite seal placed from 32feet to 28feet, annular space backfilted Bakersfield, CA 93309withsandfrom28feetto3feet, bentonite seal placed from 3 feet to 1 foot below grade, 12 -Inch diameter well box set in concrete from 1 foot to surface. Project No.: 423.EQL.00 I Page 1 j I BORING LOG Drill Rig: CME-85 Date Drilled: 9/23/03 Logged By: Bodng Dia: 10inches BoringNumber: ' VEW-4 Ryan Nunneley E M Blow Counts Completion Depth Feet Lithology Description Concrete Sand (SP) - medium brown, very fine grained sand, poorly graded, slightly sifty, very micaceous, moist no odor, 0 pprn 5 Silty Clay (CL) - dark brown, low plasticity, very micaceous, 4-5-12 10 moist no odor, 0 ppm 6 10-14 15 Sandy Silt (ML) brownish gray, nonplastic, very fine grained sand, moist moderate odor, 624 ppm 9-12-16 20 Silty Sand (SM) - grayish brown, very fine-fine grained sand, poorly graded, noriplastic, slightly micaceous, moist, strong odor, 534 ppm 12-18-22 25 Sand (SP) - light t;r_o_wniih —gray, —very TinPiri—egraiFe—dsaFn—d poorly graded, very micaceous, moist moderate odor, 576 ppm 15-213-26 30 Sand (SP) - light gray, very fine grained sand, poorly graded, moderately micaceous, damp, strong odor, 1124 ppm SandTSP) - li t gray, very fine-medium grained sand, poorly 21-24-39 35 i graded, very micaceous, damp, strong odor, 4000+ ppm 23-24-24 Y. 40 Y_ FightCrown, very fine-fine grained sand, poorly graded, very micaceous, damp, odor, 1081 pprnstron2_ Clay (CH) - brownish gray, high plasticity, moderately mi ou Mcacesoist, no odor, 0 ppm SandTSP) P 20-20-22 17-22-29 22-50 45 7 50 55 r .9:. P 9 P. Clayey Sand (SC) - brownish gray, very fine-fine grained sand, poorly graded,. nonplastic, very micaceous, very moist, moderate odor, 244 ppm Clayey Sand (SC) - dark gray, very fine-fine grained sand, poorly graded, nonplastic, very micaceous, very moist, no odor, 0 ppm Sand (SP) - light grayish brown, very fine-fine grained sand, poorly graded, slightly clayey, very micaceous, very moist, no odor, 0 pprin 23-50 60 Sand (SW) - light gray, fine-coarse grained sand, well graded, trace gravel to 1/2", damp, no odor, 0 pprn 26-32-32 65 Completion Notes: Site-w VEW-4 Is nested with two 2" wells. VEW-4A is screened with 20 feet of schedule 40 PVC, 0.020" slotted screen from 10 feet to 30 feet below grade. 10 feet to surface is blank schedule 40 PVC. Texaco Service Station VEW-4B is screened with 25 feet of schedule 40 PVC, 0.02T slotted screen from 40 feet to 65 feet below grade. 40 feet to surface is blank schedule 40 PVC. Annular spaced backfilled with sand 4050 Gosford Road from total depth to 37 feet bentonite seal placed from 37 feet to 33 feet, annular space backfilled with sand from 33 feet to 8 feet bentorifte seal placed from 8 feet to I foot below grade, 12-inch Bakersfield, CA 93309 diameterwell box set in concrete from 1 foot to surface. Project No.: 423.EQL.00 Page 1 BORING LOG Drill Rig: CME-85 Date Drilled: 9/23/03 Logged By: Boring Dia: 10 Inches Boring Number. VIEW-5 Ryan Nunneley CL E Blow Counts Completion Depth Feet Lithology Description Concrete Sand (SP) - grayish brown, very fine-fine grained sand, poorly graded, slightly silty, very micaceous, damp, slight 5 odor, 56 ppm Silty Clay (CL) - medium brown, low plasticity, slightly 7-15-17 10 JIM micaceous, mosit, slight odor, 82 ppm WL—)-- rii iu6i —brovvF _nonF1a—sti6_ve_'Fy Fin-e- 6-9-12 15 grained sand, slightly micaceous, very moist, strong odor, 3405 ppm 10-10-17 20 Silty Sand (SM) - light grayish brown, nonplastic, very fine -fine grained sand, slightly micaceous, moist, strong odor, 4000+ ppm SandFSilt (WIL) - light gri Th lTrown, Tine gl ained Tand, 6 . 15-19-35 25 I M slightly micaceous, very moist strong odor, 3081 ppm Sand (SP) - light brownish gray, very fine-fine grained sand, poorly graded, very micaceous, damp, strong odor, 4000+ 22-30-34 30 PPM Sand (SP) - light brownish gray, very fine-fine grained sand, 26-36-41 35 poorly graded, very micaceous, damp, strong odor, 2391 PPM 2.4-28-35 40 h RoW ve e griined TandSand (SP) - light grayis Tn- poorly graded, very micaceous, very moist strong odor, 1378 ppm 19-21-24 16-27-38 40-45-50 Y 45 50 Y. 55 e7— TandTClayTCH) -7jrayi;h broNWn higFplasl7c 6ne-m dium grained sand, very micaceous, very moist, slight odor, 47 PPM Sand (SP) - grayish brown, very fine-fine grained sand, poorly graded, slightly clayey, very micaceous, moist, no odor, 0 pl3m Sand (SW) - light gray, very fine-medium grained sand, well graded, very micaceous, damp, no odor, 0 ppm 23-38-43 y. 60 . SandTSW) - light Fray, 6;:coarse gigined Tand, 7ell graded, moderate gravel to 1/3", very micaceous, damp, no odor, 0 ppm 16 -11-15 65 Silty Sand (SM) - medium gray, nonplastic, very fine grained sand, very micaceous, very moist no odor, 0 ppmP Completion Notes: Site:, VEW-5 is nested with two 2" wells. VEW-5A is screened with 25 feet of schedule 40 PVC, 0.020' slotted screen from 5 feet to 30 feet below grade. 5 feet to surface is blank schedule 40 PVC. Texaco Service Station VEW-5B is screened with 25 feet of schedule 40 * PVC, 0.020' slotted screen from 40 feet to 65 feet below grade. 40 feet to surface is blank schedule 40 PVC.. Annular spaced backfilled with sand 4050 Gosford Road from total depth to 37 feet bentonite seal placed from 37 feet to 33 feet, annularspace backfilled Yvith sand from 33 feet to 3 feet bentonite seal placed from 3 feet to I foot below grade, 12-inch Bakersfield, CA 93309 diameter well box set in concrete from 1 foot to surface. Project No.: 423.EQL.00 Page 1