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2. <br /> 3. l Soil Sampling <br /> Phase 2 drilling was conducted by Spectrum Exploration, Inc (C57 512289) utilizing a hollow <br /> stem auger drill ng A field geologist continuously logged all drill cuttings and cored soil <br /> samples utilizing the Unified Soil Classification System (Appendix II) Descriptions of soil types <br /> 1 encountered and sample collection intervals are included on the boring/well logs (Appendix II) <br /> Cored soil samples were collected at five foot intervals using a 2-inch diameter split-spoon <br /> sampler containing three brass tubes The cored samples and drill cuttings were characterized <br /> for soil type, moisture content, and evidence of petroleum contamination Moreover, a PID was <br /> used as a screening device for the detection of petroleum hydrocarbon vapors in drill cuttings <br /> and cored samples Soil samples collected at the water table interface were submitted for <br /> laboratory analysis Soil sampling results are summarized in Table 2 Laboratory data sheets <br /> and chain-of-custody documentation are included in Appendix IV <br /> 3.2.2 Monitoring Well Construction <br /> Soil borings MW4, MWS, and MWb were subsequently completed as groundwater monitoring <br /> wells to further assess the extent of groundwater contamination beneath the site, and to provide <br /> measurement points for the determination of groundwater flow direction and hydraulic gradient <br /> The locations of the site monitoring wells are shown on Figure 2 <br /> 1 Each well was constructed with 2-inch PVC casing The screened interval of each well was <br /> positioned from approximately 5 feet above to 15 feet below the encountered water table to allow <br /> ' for seasonal water level fluctuations. The screen slot size is 0 01 inch <br /> 3.2.3 Groundwater Sampling <br /> On October 29, 1991, the wells were monitored and developed in accordance with RESNA's <br /> QA/QC Protocol (Appendix III). Field purge logs are included in Appendix V Water samples <br /> were then collected from the wells, placed on ice, and transported under chain-of-custody to <br /> ' Applied Analytical for analysis The samples were analyzed for BTEX and TPHG utilizing EPA <br /> 8020 and 8015 methodologies, respectively The analytical results are summarized in Table 3 <br /> Laboratory data sheets and chain-of-custody documentation are included in Appendix IV <br /> ' GPR12271PL 5 <br />