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KL /E NFELDER <br /> 1 �9tleMttae�e.PlgM1tsoNoonc <br /> using the drill rig approximately 3 to 5 feet into the soil/aquifer formation at the bottom <br /> 1 of the boring. A thoroughly decontaminated bailer can then be lowered down the center <br /> of the Hydropunch II® casing to obtain a sample of groundwater (which has entered the <br /> 1 Hydropunch II® due to hydrostatic pressure). <br /> 1 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 /> 1 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 /> 1 <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> i <br /> 9 <br /> 117226.E02/ST012R0693 <br /> Page A-7 September 11, 2012 <br /> 1 Copyright 2012 Kleinfelder <br />