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LK E/NFELDER <br /> Bright hople.Right SaluHonx <br /> • using the drill rig approximately 3 to 5 feet into the soil/aquifer formation at the bottom <br /> of the boring. A thoroughly decontaminated bailer can then be lowered down the center <br /> of the Hydropunch Ile casing to obtain a sample of groundwater (which has entered the <br /> Hydropunch Ile due to hydrostatic pressure). <br /> To reduce the potential of introducing contaminants into the samples, the drive tip, <br /> galvanized pipe, and other equipment used for sample collection are steam cleaned <br /> and/or washed with trisodium phosphate (TSP) solution and rinsed with distilled water <br /> prior to use. The sample tips and filters are not retrievable. New O-rings, tips, and <br /> screens are used for each sample. <br /> • <br /> • <br /> 117226.E02/ST012R0696 Page A-7 September 14, 2012 <br /> Copyright 2012 Kleinfelder <br />