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ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised March 1998 <br /> l <br /> sewer. Drummed water will be labeled with the source of the water to help ensure appropriate disposal <br /> 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 field ! <br /> 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 /> 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 /> i <br /> hollow stem auger by a 140-pound hammer with a 30-inch drop in accordance with American <br /> Society for Testing and Materials(ASTM) Methods D 1586-84 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 /> 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 labeled with the following information: { <br /> ✓ date and time <br /> ✓ project ID <br /> ✓ sample ID f <br /> ✓ name of sampler <br /> ✓ type of analysis to be performed <br /> W:Wdmin\Shells\QAQC-98.DOC <br /> e <br /> l <br /> t <br />