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` • . 4Pu YF9 • I e I� Ms. Ellsaesser Page 2 San Joaquin County EHD May 20,2013 Project Number 33113-013018.02 encountered first). Three of the borings will be for grab groundwater sampling, only. Up to one soil sample will generally be collected at the remaining boring locations, except for borings along the former Shell pipeline area where up to 2 soil samples will be collected for analysis. • Up to seven soil vapor borings will be advanced to 5 feet bgs in proposed structure locations. Direct-push drilling equipment will be used to advance the soil borings. Standard soil logging and sample handling practices will be employed. The soil, soil vapor and grab groundwater samples will be collected from the borings and preserved using standard techniques. The borings will be grouted using a tremmie pipe in accordance with SJCEHD guidelines. Soil cuttings and decontamination rinsate generated during drilling activities will be placed into appropriate, sealed and labeled 55-gallon drums. Samples of the investigation-derived wastes will be collected and submitted to an analytical laboratory for waste characterization analyses. Following waste acceptance profiling, the drums will be picked-up and disposed at an appropriate, offsite waste disposal facility. Laboratory Analysis: Up to 16 groundwater samples, 30 soil samples and seven soil vapor samples will be submitted to analytical laboratories for analysis of one or more of the following analyses by standard United States Environmental Protection Agency(USEPA) methods. • Total Petroleum Hydrocarbons(TPH) as gasoline-range organics(TPH-g), diesel-range organics (TPH-d)and motor oil-range organics(TPH-mo)by USEPA Method 8015B with silica gel cleanup —Up to 30 soil samples(up to 12 shallow composite samples and 18 discrete samples) • Benzene, Toluene, Ethyl benzene and Xylenes (BTEX) and MTBE by USEPA Method 82608- Up to 30 soil samples (up to 12 shallow composite samples and 18 discrete samples) • Organochlorine Pesticides(OCPs) by USEPA Method 8081 —Up to 18 soil samples (including 12 composite samples and 6 discrete samples) • Resource Conservation Recovery Act(RCRA) 8 Metals by USEPA Method 6010—Up to 18 soil samples (up to 12 shallow composite samples and 6 discrete samples) • Volatile Organic Compounds(VOCs) and TPH-g by USEPA Method 82608—Up to 16 grab- groundwater samples • TPH-d and TPH-mo by 8015M with silica gel cleanup—Up to 16 grab-groundwater samples • VOCs by TO-15- Up to 7 soil vapor samples Reporting: Upon completion of the field activities and receipt of the laboratory analyses, BVNA will review our findings and analytical results and prepare a written report summarizing the work performed at the Site. The report will include tabulated data summaries, figures showing the boring locations and appended boring logs and certified analytical reports.