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Mr. Michael J. Infurna, ii. San Joaquin County Public Health Service November 3, 1992 Page 2 1.2 Prepare a site-specific Health & Safety Plan, which documents possible health- related exposures and safety concerns at the site. The Director of Health and Safety Services at the corporate office (or an approved designee) will review this plan. The Health and Safety Plan will be presented as an appendix of the workplan. 1.3 Prepare drilling permit applications. The completed permits and applicable fees will be submitted to the SJCPHS. Task 2 Soil Borings, Sampling and HydroPunch H Installations: This assessment is designed to investigate the presence of hydrocarbon affected soil and groundwater at the site in areas accessible to the drilling equipment. This work will proceed once ATEC has received approval of the work plan. ATEC will then: 2.1 Drill approximately 4, 6-inch diameter soil borings using a drilling rig and a hollow-stem auger assembly and perform a HydroPunch II groundwater sampling. The boring locations will be located by the ATEC Project Geologist. Preliminary locations are shown on Figure 2. All equipment will be steam cleaned prior to arriving on site and the auger will be subsequently cleaned before moving to the next boring location. Sampling equipment will be cleaned between each use by washing in a Liqui-Nox solution followed by rinsing first with tap water and then with distilled water. Soil cuttings from the augering operations will be placed in California Department of Transportation approved steel drums, properly labeled, sealed and taken to the site for storage. 2.2 Collect soil samples from the boreholes through the hollow-stem auger at approximately 5-foot intervals from the surface to the groundwater table anticipated to be a depth of 15 feet. The sampler will be driven 18-inches ahead of the drill bit using a 140-pound hammer with a 30-inch drop. The number of blows necessary to drive the sampler will be recorded on the boring logs as a qualitative measure of the soil characteristics. The split spoon sampler will be fitted with 6-inch long, 2-inch diameter brass sleeves in which the soil samples will be collected. An ATEC geologist will log the soils penetrated and note soil type, color, and obvious contamination. The soils will be classified in accordance with the Unified Soil Classification System (USCS). The onsite Project Geologist will screen these samples using a Photovac MicropTip (PID). This device detects the potential presence of total volatile organic compounds (total VOCs) contained in the pore spaces of the sample and provides a tentative screening evaluation. Typically, soil from one of the brass liners not retained for laboratory testing will be extracted into a zip-lock bag and broken apart. The PID tip is then pushed through the bag and the headspace within the bag is analyzed. sjcphs-11.rpt