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Frontier Transportation, Inc. <br /> Well Installation Work Plan <br /> July 30, 2008 <br /> Page 5 <br /> Following placement of the annular seal, a large-diameter flush-mount protective casing will be <br /> installed around the well heads. The casing will be firmly seated in concrete and supplied with <br /> lockable covers for security. <br /> 5.1) Soil Sampling <br /> A total of four soil samples will be collected at 5 ' intervals from the boring and at depths <br /> where visual or PID inspection indicates contamination. All samples will be collected in a split <br /> spoon sampler lined with 2-inch by 6-inch brass tubes. The bottom brass tube will be immediately <br /> sealed with Teflon tape, capped, and packaged in a cooler with ice. The second brass tube will be <br /> field screened using a PID to detect volatile organic compounds and used to classify soil <br /> sediments. <br /> All soil samples that detect petroleum hydrocarbon vapors using a PID or visual inspection <br /> will be submitted to a California certified laboratory for analysis. All soil samples submitted to the <br /> laboratory will be analyzed for TPH-g, BTEX, and MTBE and oxygenates using EPA methods <br /> 8015 modified and 8260 . <br /> 5.2) Analytical Methods and Quality Assurance <br /> A California Department of Health Services certified laboratory would conduct all <br /> chemical analysis of site samples. The chosen laboratory will maintain strict conformance to EPA <br /> standard methodologies, quality assurance/quality control (QA/QC) protocols and standard <br /> laboratory practices supporting EPA procedures . <br /> 5.3) Schedule <br /> Following acceptance of the work plan by the PHS/EHD, on site test activities will <br /> commence within sixty days of project approval. <br /> 6.0) FIELD DOCUMENTATION AND CHAIN-OF-CUSTODY <br /> The following sections describe the recording system for documenting all site field <br /> activities and the sample Chain-of-Custody Program. <br />