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} 0 i 15 October 2003 AGE-NC Project No 96-0232 Page 3 of 5 located to assess MTBE-impact to the First Water • Soil boring P-42 will be located approximately 40 to 50 feet east-northeast of monitoring well MW-8, P-42 will serve to assess MTBE-Impact to First and Second Water Zone that may have migrated from the east or northeast • Soil boring P-43 will be located approximately 190 to 210 feet north of monitoring well MW-8,in the San Joaquin County right-of-way on Banner Avenue, P-43 will serve to assess MTBE-impact to First and Second Water Zone that may have migrated from the fueling facility located at 6437 West Banner Avenue (New West Petroluem) Proposed soil boring locations are illustrated in Figure 2 A geologic cross section is Illustrated in Figure 3 Initially, each soil boring will be advanced to 50 feet below surface grade(bsg) However, total depths of borings will be based on field conditions, field observations and field screening using an organic vapor monitor (OVM) Soil samples will be collected from each boring at five-foot Intervals beginning at 5 feet bsg to the total depth, a mi mum of one soil sample will be submitted for laboratory analysis for every 15 linear feet Additionally, grab ground water samples will be collected from each soil boring at depths of 20 feet bsg, 30 feet bsg, 40 feet bsg and 50 feet bsg . Field procedures for advancement of soil borings and collection of soil samples are presented in Section 3 1 Selected soil and grab ground water samples will be analyzed by a State of California Department of Health Services (DHS)-certified laboratory for the following constituents • Total petroleum hydrocarbons as gasoline, diesel and motor oil (TPH-g, TPH-d and TPH-mo) in accordance with EPA Methods 5030/8015 Modified, • Benzene,toluene,ethyl-benzene and total xylenes(BTEX)in accordance with EPA Methods 5030/8020, • 1,2-Dichloroethane(1,2-DCA),ethylene dibromide(EDB),methyl tert butyl ether(MTBE), tert-amyl methyl ether(TAME),di-Isopropyl ether(DIPE),ethyl tert-butyl ether(ETBE)and tert-butanol (TBA)by EPA Methods 5030/8260 Modified, and Serol-volatile organic compounds by EPA Methods 610/625/8270 Laboratory reports for soil/ground water analyses, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report with findings and recommendations Advanced Geo Environmental,Inc