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�- • in KLEI N F E L D E R File No. 20-YP4071 June 23, 1994 As a result of the analyses performed, an Underground Storage Tank Unauthorized Release (Leak)/Contamination Site Report was filed by Mr. William R. Snavely of the SJCEHD on February 3, 1989, stating that gasoline constituents were discharged to the soil beneath the site from two removed 550-gallon tanks. On June 8, 1994 a letter was issued by Ms. Diane M. Hinson of the SJCEHD requiring further investigation of the extent of soil contamination and the potential impact of said contamination to soil and groundwater. PROPOSED SERV Task A01 - Permitting and Pre-Field Activities It has been Kleinfelder's experience that this proposal contains sufficient detail and information to be submitted to the SJCEHD to review and approve a boring/well permit. Kleinfelder can prepare a boring permit application, a proposed boring location map, and a health and safety plan for submittal along with this proposal to SJCEHD. The permit must be approved prior to drilling the borings. Following obtaining approval from the SJCEHD, Kleinfelder will commence the actual field assessment. Task A02 - Drilling of Two Soil Borings Two (2) soil borings will be advanced to a depth of approximately 35 feet below surface grade lbsg) to get an indication of the possible presence and/or extent of hydrocarbons in the soil. During the advancement of the borings, soil samples will be collected at 5-foot intervals for lithologic classification and qualitative field screening. Lithologic classification will be based on the Unified Soil Classification System (USCS). Additionally, soil samples will be obtained for field screening with an organic vapor analyzer (OVA). The OVA measures ionizable compounds in air in parts per million by volume (ppmv). Soil samples will also be obtained for potential chemical analysis in the vadose zone. Currently, based on our experience, we anticipate groundwater in the vicinity of the project site to be present at a depth of 60 to 70 ✓ feet. Therefore, at this time we propose to analyze only two soil samples from each boring. After collection, the soil samples will be labeled, logged on a chain-of-custody, and immediately stored in an iced cooler. The samples will be submitted to a State certified laboratory for the following analyses: • TPH Purgeable by EPA Method 8015M/5030 (gasoline range) • BTEX by EPA Method 8020 ETH:md 3E/94 Page 2 of 6 Copyright 1994 Kleinfelder, Inc.