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ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> j` Revised 1998 <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 /> I; <br /> between each sample interval. 1 <br /> Soil samples will be obtained using a California modified split=spoon sampler containing three <br /> 6-inch long, 2-inch diameter brass tubes. The sampler.will be driven 18-inches ahead of the <br /> hollow stem auger by a 140-pound hammer with a 30-ir,ch drop in accordance with American <br /> r <br /> Society for Testing and Materials(ASTM)Methods D 11 586-84 for split barrel sampling of soil <br /> and D 1587-83 for thin-walled tube sampling of soils. The blows required to drive the sampler <br /> IL <br /> each 6-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 aluminum <br /> I� <br /> foil or teflon tape and plastic end caps, taped and labeledlwith the following information: <br /> U date and time <br /> ii project ID <br /> ii sample IDl <br /> ii name of sampler <br /> i9 type of analysis to be performed I <br /> II� <br /> This sample will be immediately placed into a cooler containing dry ice or frozen chemical ice. <br /> i I <br /> A "high-low" temperature recording thermometer will ac company sample shipments to ensure <br /> I� I <br /> proper temperature maintenance. The samples will be delivered to a state certified laboratory <br /> following under chain-of-custody protocol within 48 hours of sampling,whenever possible. <br /> I� <br /> .; <br /> Soil in the uppermost brass tube will be described according to ASTM standard practice for <br /> E <br /> description and identification of soils (ASTM D-2488=84). Stratigraphic, genetic and other <br /> Ii <br /> data/interpretations will also be recorded. Soil properties may also be determined from the <br /> middle brass tube and from the sampler shoe. Alternatively the second sample tube may be <br /> l <br /> 10 <br />