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ATC.Associates Inc. <br /> • Quality.Assuranc&Quaiiry Control Plan <br /> Revised November 1-002 <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 All withdrawn groundwater will be stored on-site in 55-gallon waste drums unless permission is 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 <br /> sanitary sewer. Drummed water will be Iabeled with the source of the water to help ensure <br /> appropriate 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 <br /> boring/sampling locations. The exact location and number of borings at each site will be <br /> determined in the field by the Project Geologist/Engineer. <br /> Prior to arriving at the sample site, the drill rig/augers will be steam cleaned and all <br /> sample equipment will be cleaned. Cleaning will be conducted on-site on all sampling <br /> equipment 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 <br /> for thin-walled tube sampling of soils. The blows required to drive the sampler each 6- <br /> inch interval will be recorded on the boring log. The sampler will be removed from the <br /> boring and opened to reveal the brass tubes. The bottom tube will be sealed with <br /> . w:ladminlshel€slgaac-02.doc <br /> 10 <br />