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Fon Work Plan i Frontier Transportation Page 4 _ 1 lockable covers for security. " 1 5.1) Soil Sampling iA total of four soil samples will be collected from each ',of the shallow wells and eight soil samples will be collected from , the deep wells. Soil samples will be collected at least at 5 ' intervals from the boring and at depths where visual or PID inspection indicates contamination. All samples will be collected in a split spoon sampler lined with 2-inch by 6-inch brass tubes. The bottom brass tube will be immediately sealed with Teflon tape, capped, and packaged in a cooler with ice. The second brass tube will be field screened using a PID to detect volatile organic compounds and used to classify soil sediments. Only those soil samples that detect petroleum hydrocarbon vapors using a PID or visual inspection will be submitted to a California certified laboratory for analysis . Soil samples from the stockpiled soil will also be collected in 2-inch by 6-inch brass tubes. All soil samples submitted to the laboratory will be _ gApe analyzed for TPH-g, BTEX, and MTBE at a using EPA methods 8015 modified, 0, and 8260. 50X S / /, Z. D9 5.2) Analytical Methods and Quality Assurance 0�pQ A California Department of Health Services certified laboratory would conduct ( ' 1 all chemical analysis of site samples . The chosen laboratory will maintain strict conformance to EPA standard methodologies, quality assurance/quality tycontrol (QA/ C) Protocols and standard iL laboratory practices supporting EPA procedures. i 5.3) Schedule Following acceptance of the work plan by the P /EHD, on- site test activities will commence within sixty days of project cost approval by the Underground Storage Tank A10 (UST) Fund. 6.0) FIELD DOCUMENTATION AND CHAIN-OF-CUSTODY g _ The following sections describe the recording system for documenting all site field activities and the sample Chain-of-Custody Program. i � - ' 6.1) Field Log Book An accurate chronological recording of all field activities is vital to the documentation of any environmental investigation. To accomplish this, bound and numbered field logbooks will be maintained by the field team to provide a daily record of significant events, observations, and deviations from the work plan and measurements collected during the field activities . The BEll i-1 i .- f