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ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised November 2002 <br /> All withdrawn groundwater will be stored on-site in 55-gallon waste drums unless permission is <br /> granted by the appropriate regulatory agency to discharge the water to the ground surface or sanitary <br /> sewer. Drummed water will be labeled with the source of the water to help ensure appropriate <br /> disposal based on contamination levels. <br /> 11.0 SOIL SAMPLING PROTOCOL <br /> 11.1 Sample Collection During Drilling Activities <br /> A proposal will be submitted to the lead regulatory authority with proposed boring/sampling <br /> locations. The exact location and number of borings at each site will be determined in the <br /> field by the Project Geologist/Engineer. <br /> Prior to arriving at the sample site, the drill rig/augers will be steam cleaned and all sample <br /> equipment will be cleaned. Cleaning will be conducted on-site on all sampling equipment <br /> between each sample interval. <br /> For hollow-stem auger drilling methods, soil samples will be obtained using a California <br /> modified split-spoon sampler containing three 6-inch long, 2-inch diameter brass tubes. <br /> The sampler will be driven 18-inches ahead of the hollow stem auger by a 140-pound <br /> hammer with a 30-inch drop in accordance with American Society for Testing and <br /> Materials (ASTM) Methods D 1586-84 for split barrel sampling of soil and D 1587-83 for <br /> thin-walled tube sampling of soils. The blows required to drive the sampler each 6-inch <br /> interval will be recorded on the boring log. The sampler will be removed from the boring <br /> and opened to reveal the brass tubes. The bottom tube will be sealed with aluminum foil or <br /> teflon tape and plastic end caps,taped and labeled with the following information: <br /> ✓ date and time <br /> w:\admin\shells\qaqc-02.doc <br /> 10 <br />