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Working To Restore Nature <br /> One soil boring was advanced near each of wells MW-1, MW-2, and MW-3 to investigate soil <br /> contaminants detected in those areas during RESNA's initial investigation. The groundwater <br /> ' monitoring wells and hydropunch samples were positioned to further define the lateral extent of <br /> the floating product near well MW-4 and to investigate potential groundwater contamination in <br /> -_a the upgradient and downgradient directions from the former tank. <br /> r: <br /> All field activities described herein were conducted in accordance with the site specific Health <br /> and Safety Plan and RESNA's Quality Assurance/Quality Control Plan (QA/QC) included in <br /> Appendices II and III, respectively. <br /> 4.1 Drilling <br /> Drilling was conducted by Spectrum Exploration, Inc. (C57 ##512268) utilizing a hollow stem <br /> auger drill rig. To prevent cross-contamination, drilling augers were steam-cleaned before <br /> .. drilling each borehole. All rinsate produced during decontamination procedures was stored in <br /> DOT approved drums and remain on-site. All drill cuttings produced were stockpiled on-site, <br /> overlain and covered with 6 mil plastic sheeting. <br /> :._.' Soil borings not converted to groundwater monitoring wells were abandoned by placing a <br /> minimum of two feet of bentonite in the bottom of each hole and hydrating with tap water. The <br /> remaining open hole was filled to the surface with a neat cement grout. <br /> --a <br /> t 4.2 Soil Sampling <br /> Discrete soil samples were collected from the wells and borings at five foot intervals above the <br /> soil/water interface beginning at a depth of five feet. A field geologist was present to <br /> I <br /> continuously log drill cuttings and soil samples utilizing the Unified Soil Classification System. <br /> Descriptions of soil types encountered and sample collection intervals were recorded on the <br /> boring/well logs included in Appendix IV. Cored soil samples were collected using 2-inch <br /> diameter split-spoon samples containing brass tubes. The cored samples and drill cuttings were <br /> characterized for soil type, moisture content and evidence of petroleum contamination. A <br /> REPORTSIPAR1093.FNL 4 <br /> j <br />