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21 March 2003 <br /> AGE-NC Project No. 95-0114 <br /> Page 8 of 11 <br /> on-site in an area lacking public access. Disposal alternatives will be evaluated based on results of <br /> soil and water analysis. <br /> 4.1.1. Soil Sample Collection and Preservation Procedures <br /> Soil samples will be collected will be at collected every 5 feet in the three pilot borings located off- <br /> site,utilizing a truck mounted drill rig equipped with hollow-stem auger and a California split spoon <br /> sampler fitted with three six-inch long brass sleeves.A 5-foot long,continuous core sampler will be <br /> used for sampling the boring located near the former UST location (Figure 2). <br /> Upon removal from the California split spoon sampler, the sample sleeves will be separated with <br /> a knife, and the exposed ends of the second sleeve will be covered with Teflon sheets, capped and <br /> sealed with tape.Upon removal from the continuous core sampler,soil samples will be collected by <br /> pushing a 2-inch by 3-inch long brass sleeve into the core recovery, and the exposed ends of the <br /> sleeves will be covered with Teflon sheets, capped and sealed with tape. Following sample <br /> collection, each preserved sample sleeve will be labeled with the boring location, depth,time,date <br /> and sampler's initials.Appropriately sealed and labeled samples will be placed under ice in a chilled <br /> container and will be transported under chain-of-custody to a DHS-certified laboratory. <br /> In addition, soils encountered in the borings will be visually classified by an AGE geologist in <br /> accordance with the Unified Soil Classification System(USCS), and the soil samples will be field <br /> screened for the presence of volatile organic compounds using an organic vapor meter (OVM) <br /> equipped with a photo-ionization detector (PID: Thermo Environmental 580B, 10.0eV [or <br /> equivalent], calibrated to isobutylene). <br /> 4.1.2. Multi-level Ground Water Monitoring Well Completion <br /> Four soil pilot borings will be established to approximately 150 feet bsg for completion as `multi- <br /> level' ground water wells. <br /> Each `multi-level' well will be completed in a single soil boring utilizing 1.7-inch outer diameter <br /> polyethylene tubing containing segregated vertical chambers that can be individually completed as <br /> monitoring wells at different depths. The inner tubing consists of seven %-inch diameter or four <br /> larger diameter Teflon tubes partitioned into separate chambers running the length of the casing. <br /> Each multi-level well casing will be prefabricated at the factory with the proposed perforated <br /> intervals; a stainless steel, 0.02-inch screen will be wrapped around each perforated interval of the <br /> tubing. <br /> Advanced GeoEnvironmental,Inc. <br />