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Work Plan—PEA Page 9 Former Haley Flying Service GPE Project 474.2 Upon retrieval, each soil sample accompanied by the CofC will be transported to Argon Laboratories of Ceres, CA, a California Environmental Protection Agency (CalEPA) certified laboratory (certification# 2359). All samples will be tested for organochlorine pesticides by EPA method 8081 A. The specific chemicals and their reporting limits are summarized in the tables in Appendix B. In addition, two shallow soil samples from the vicinity of the washout pit and two from the area of the cracked aircraft loading pad will also be tested as follows: • Organophosphorous herbicides and pesticides by EPA method 8141 A, • Chlorinated Herbicides by EPA method 8151A and, • N-methyl Carbamate pesticides by EPA method 8318. The specific chemicals and their reporting limits are summarized in the tables in Appendix B. As mentioned above, one sample will be tested for volatile organic compounds (VOC's) by EPA method 8260B and for Total Extractable Petroleum Hydrocarbons by EPA method 8015m. The list of VOC's and their reporting limits are included in Appendix B. 2.1.3 Groundwater Sampling and Analysis Prior to installing the proposed soil borings, the required drilling permit will be obtained from the San Joaquin County Environmental Health Department. The two Geo-Probe soil borings will be drilled using 1.5" outside diameter Geo-Probe drilling equipment owned and operated by V & W Drilling (C-57 License #720904). The borings will be advanced to a depth sufficient to penetrate the groundwater surface (est. about 10 feet). The boring locations (designated B-1 and B-2) are shown on the detailed site sketch map (Figure 3). The Geo-Probe is a truck-mounted drilling system that uses direct push methodology to collect soil and groundwater samples. Four-foot long by 3/4-inch diameter stainless steel rods are pushed or hammered into the ground using a hydraulic ram or the hydraulically actuated hammer mounted on the ram. The lead section is a hollow drive-sampling device equipped with a 4-foot long by 1.5-inch inside diameter drive-sampler lined with a plastic sample sleeve. The Geo-Probe allows continuous coring of the soil in the four-foot long liners inside the 1.5- inch sampling tool. Soil cores will be logged for lithologic and stratigraphic analysis. Upon retrieval, the soil at the end of each four-foot long plastic sample sleeve will be described and logged. The sample sleeve will be sealed with teflon sheets or aluminum foil, capped with plastic end caps, secured with tape, labeled, and retained for possible further analysis. During drilling, a log will be made of each boring. Information to be noted includes such data as sample depths, horizons of detectable contamination (detected by field methods), soil classification utilizing the Unified Soil Classification System and sediment description (color, 2937 Veneman Avenue, Suite B240 Geo-Phase Environmental Inc. Phone: (209)569-0293 Modesto, Ca 95356 Fax: (209)569-0295