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,.(v <br /> kTCt <br /> ASSOCIATES I N C . <br /> collection intervals are included on the boring/well construction logs contained in Appendix A. <br /> Drill cuttings were temporarily stored on site in 55-gallon DOT approved steel drums. <br /> h <br /> 2.5 Soil and Groundwater Sampling and Analysis <br /> The cored soil samples were collected from each boring at five-foot intervals using a 2-inch <br /> L' diameter split-spoon sampler containing three brass tubes. Soil samples were not collected from <br /> the top thirty feet of boring S1312, located adjacent to well MW4. The cored samples and drill <br /> cuttings were characterized for soil type, moisture content, and visual evidence of petroleum <br /> hydrocarbons. A flame ionization detection meter (FID) was used as a field screening device for <br /> the detection of petroleum hydrocarbon vapors in drill cuttings and cored samples. <br /> Two groundwater samples were collected from boring SB12 at depths of 30 feet and 50 feet bgs. <br /> A SimulProbeTI groundwater sampling device was used to collect the grab groundwater samples. <br /> A pressurized two-liter canister contained inside the SimulProbe device was lowered into the <br /> hole to 30 feet and 50 feet bgs and was then depressurized and groundwater was collected into <br /> the canister. <br /> Soil and groundwater samples were placed on ice and delivered under chain-of-custody <br /> documentation to Argon for chemical analysis. Soil and groundwater samples were analyzed by <br /> W"51 Argon for TPHd and TPHg by EPA Method 8015, BTEX and methyl tertiary butyl ether <br /> (MTBE) by EPA Method 8020. Samples that contained detectable concentrations of MTBE by <br /> EPA Method 8020 were also analyzed for oxygenate fuel additives by EPA method 8260. In <br /> addition, four soil samples were analyzed for total lead to profile the soil for disposal at an <br /> appropriate disposal facility. The analytical results for soil samples are summarized in Table I <br /> and the analytical results for groundwater samples are summarized in Table 2. Soil laboratory <br /> data sheets and chain-of-custody documentation are included in Appendix B and groundwater <br /> laboratory data sheets and chain-of-custody documentation are contained in Appendix C. <br /> 2.6 Groundwater Monitoring Well Construction <br /> Soil borings MW4, MW5, and MW6 were subsequently completed as groundwater monitoring <br /> wells to assess impacted groundwater, and to provide measurement points for the determination <br /> of groundwater flow direction and hydraulic gradient. The wells were surveyed on August 13, <br /> �- 2000 and tied into the existing groundwater wells. Survey results are contained in Table 2. <br /> ' Each well was constructed with 2-inch PVC casing. The screened interval of each well was <br /> LW 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 0.020-inch. Well construction details i <br /> are depicted on the well logs contained in Appendix A. <br /> •..✓ <br /> w:154.625Wreportslsumiii.doc 4 <br />