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28 January 1998 <br /> AGE-NC Project No. 96-0232 <br /> Page 3 of 6 <br /> 2.4. GROUND WATER DEPTH AND GRADIENT <br /> Historical ground water monitoring data collected at the site suggests that the water-table surface ' <br /> beneath the site occurs at a depth of approximately 14 feet below surface grade (bsg). <br /> Based upon historical ground water monitoring events performed at the site, ground water flow <br /> direction has generally been towards the north, southwest and southeast. However, ground water <br /> flow direction may vary locally and/or seasonally. <br /> 3.0. SCOPE OF WORK <br /> 3.1. DRILLING AND SAMPLING <br /> Initially,the scope of work includes the advancement of three soil borings to depths of 55 feet bsg; <br /> collection of soil and ground water samples; and completion of each boring as a dual completed 2- <br /> inch diameter ground water monitoring well. Following monitoring well completion, each well will <br /> be developed and surveyed. <br /> Soil borings will be advanced utilizing a truck-mounted,hollow stem drill rig and 10-inch diameter <br /> hollow-stem augers. Cuttings and rinseate generated during drilling activities will be containerized <br /> in properly labeled D.O.T. model 17H 55-gallon drums, and stored on-site in all area lacking public <br /> access. Disposal alternatives will be evaluated based on results of soil analysis. <br /> Soil samples will be collected at five-foot intervals beginning at a depth of 15 feet bsg using a <br /> California split-spoon sampler and brass sleeves. The sampler will be driven by dropping a 140- <br /> pound weight from a height of 30 inches. Upon soil sample retrieval,the middle brass sleeve will <br /> be removed from the sampler. The ends of the brass sleeve will be immediately covered with teflon <br /> tape or aluminum sheets, sealed with plastic end caps, secured with tape and immediately placed in <br /> a chilled container for transportation to a State-certified laboratory. Each sample sleeve will be <br /> labeled with the following: boring location, depth, time, date and sampler's initials. <br /> Soils are to be described using the Unified Soil Classification System (USCS). Soil sample <br /> descriptions and PID screening results will be summarized on boring logs prepared for the final <br /> report. <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> Advanced CeoEnvironmental,Inc. <br />