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1< Z <br /> h" KLEIN FELDER <br /> File No 20-3769-01 <br /> November 21, 1994 <br /> revealed concentrations of benzene above the Maximum Contaminant Level The samples <br /> obtained from MW-1 and MW-2 revealed toluene, ethylbenzene, and total xylenes above the <br /> California EPA Action Level High concentrations of TPH-K, TPH-G, and TRPH were also <br /> present in the samples obtained from MW-1 and MW-2 <br /> As a consequence of the results obtained and discussions with Mr Silva, Ms Manam, and <br /> Messrs Sasson and Collins of the San Joaquin County Public Health Services Department <br /> Environmental Health Division, further assessment of the extent of hydrocarbons in <br /> groundwater are needed <br /> PROPOSED SERVICES <br /> Task 1301 -Permitting and Pre-Field Activities <br /> It has been Kleinfelder's experience that this request contains sufficient detail and information to <br /> be subinitted to the San Joaquin County Public Health Services Environmental Health Division <br /> • (SJCEHD) to review and approve a boring/well permit Kieunfelder can prepare a boring permit <br /> application, a proposed boring location map, and health'and safety plan for submittal along with <br /> `this proposal to SJCEHD The permit must be approved prior to drilling the borings Following <br /> obtaining approval from the SJCEHD, Kleinfelder will commence the actual field assessment <br /> The cost for this task, as reflected in Attachment B, is the same unit price as that expressed in <br /> our awarded contract <br /> Task B02 -Drilling of Soil Borings and Monitoring Well Installation <br /> Two (2) soil-borings will be advanced to depths of approximately 40 to 55 feet below surface' <br /> grade (bsg) at the Hydropunch and monitoring well locations respectively, to further define the <br /> hydrocarbon-affected groundwater <br /> Based on previous soil samplings and the site-specific depth to groundwater, during the <br /> advancement of the proposed borings, soil samples will be collected at 5-foot intervals for <br /> lithologic classification and qualitative field screening beginning at a depth of 25 feet below <br /> grade Lithologic classification will be based on the Unified Soil Classification System (USCS) <br /> Additionally, soil samples will be obtained for field screening with an organic vapor analyzer <br /> (OVA) The OVA measures ionizable compounds in air in parts per million by volume (ppmv) <br /> Soil samples will also be obtained for potential chemical analysis <br /> ETH and WC194 f 11 3 08 e <br /> Copyright 1994 Kleinfelder, Inc Pa <br />