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7�7 <br /> ' ICF KAISER STANDARD OPERATING PROCLURlES <br /> ENGINEERS .�. <br /> SOPNtAM, 38e*CES <br /> PAGE 1 OF 3 <br /> Environment COLLECTION OF HYDROPUNCHqD SAMPLES DATE ISSUED 02/03/94 <br /> Group <br /> PREPARED BY <br /> ICF Kaiser Engineers (ICF KE) <br /> 5.0 ' SCOPE AND APPLICATION. <br /> The purpose of this standard operating procedure is to delineate protocols for the collection of <br /> water samples with the HydropunchO. <br /> 5.2. MATERIAL <br /> • Drilling equipment (provided by the subcontractor) <br /> • Water level indicator <br /> • Hydropunche (provided by the subcontractor) <br /> 5.21 PROCEDURE <br /> Sampling with Auger Drilling Equipment <br /> • Drill the initial hole to just above the water bearing zone. <br /> • Attach the clean HydropunchO (via the AW Box thread at the top) to the drive rods. <br /> • Advance the HydropuncF® into the undisturbed water bearing zone (whether or not it <br /> is driven depends on the depth of coring reached at the particular borehole). The <br /> Hydropunche may be driven into position in the same manner as a 2-inch split spoon <br /> soil sampler, normally using a 140 lb. hammer (ASTM D1586). <br /> • When driving the tool with a hammer, a threaded cap on the upper check valve should <br /> be used. <br /> • Chalk marks at 6-inch intervals should be made on the drill rods to aid in counting the <br /> blows. <br /> • When the final depth hasbeen achieved, pull back on the drive casing to pull the cone <br /> and screen out of the body of the tool, permitting water to enter. <br /> • DO NOT PULL THE TOOL BACK FURTHER THAN IT WAS DRIVEN. A minimum of <br /> 6 inches of the body of Jhe tool needs to be in the driven hole to provide a good <br /> annular seal. Additionally, since the screen is 41/2 feet long, the tool cannot be pulled <br /> back more than 4'/2 feet without separating the screen from the body. <br /> sop-W5 <br /> area <br />