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�. •o <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> 600 East Main Street <br /> a (LMllla Stockton, California 95202-3029 PROGRAMCOOR <br /> Robert McClellon, REHS RS <br /> REHS <br /> Jeff Carruesco, REHS, RDI <br /> c'q "-ij�P • Website: www.sigov.org/ehd Kasey Foley,REHS <br /> FOR Phone: (209)468-3420 <br /> Fax: (209) 464-0138 <br /> Jose M Garcia, Armuro Medrano, & <br /> Clemenge Garica <br /> 4018 E. Emerson Road <br /> Acampo, CA 95220 <br /> Subject: Former Parmar Texaco LOP Site Code: 1324 <br /> 521 N. Cherokee Lane <br /> Lodi, CA 95240 <br /> WORK PLAN: Soil Vapor Extraction Well Installation and Soil Vapor Extraction/In-Situ <br /> Air Sparge Pilot Test for Petroleum Hydrocarbon Contaminated Soil and Ground Water <br /> DATED: January 2010 <br /> PREPARED BY: Stephen G. Muir Consulting Geologist and Geophysicist <br /> APPROVED: IN <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25296.10 (c)(3)]: <br /> 1. Two dual completed vapor extraction wells (VEW) will be installed on-site. Two 2 <br /> inch diameter casings will be nested in a common soil boring. In each of the two <br /> borings, one casing will be screened in the shallow vadose zone and one casing will <br /> be screened in the deeper vadose zone near and above the static water level. <br /> 2. Prior to well construction, selected soil samples will be collected from the soil borings <br /> for laboratory analysis of: TPH-g, BTEX, gasoline oxygenates, and gasoline <br /> additives in accordance with USEPA Methods 8015M and 8260B. <br /> 3. The two soil vapor extraction wells will used for a Soil Vapor Extraction/In-Situ Air <br /> Sparge Pilot Test (test). <br /> 4. A vacuum will be applied to each of the zones for a specified time during the test. <br /> 5. An existing on-site well (PT-MW2) is proposed for air injection during the test. <br /> 6. Effluent air samples will be collected in Summa canisters at specified intervals <br /> during the test and analyzed for: TPH-g, BTEX, and MTBE in accordance with <br /> USEPA Method TO-3. <br /> 7. Granulated activated carbon will be used to remove influent air contaminants before <br /> air is discharged into the atmosphere. <br /> 8. Surrounding wells will be monitored for vacuum and air transfer to establish a radius <br /> of influence. The results will be utilized for remedial system engineering and design <br /> in a Corrective Action Plan. <br /> 9. The duration on the test will be for approximately 20 days; a 5 day test on each <br /> screened area. <br /> 10. A SVE/IAS Pilot Test report will be prepared and submitted to the EHD and <br /> CVRWQCB. An EFD will also be uploaded into the SWRCB's GeoTracker. <br />