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r ! Y <br /> Quality Assurance/Quality Control Plan Page 9 <br /> Prior to arriving at the sample site, the drill ng/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 /> six inch long, two 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 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 sods The blows required to drive the sampler <br /> each six inch interval will be recorded on the boring log The sampler will be removed from <br /> the boring and opened to reveal the brass tubes. The bottom tube will be sealed with aluminum <br /> foil or teflon tape and plastic end caps, taped and labeled with the following information date, <br /> time, project ID, sample ID, name of sampler and type of analysis. This sample will be <br />• immediately placed into a cooler containing dry ice or frozen chemical A "high-low" <br /> temperature recording thermometer will accompany sample shipments to ensure proper <br /> 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 /> Soil in the uppermost brass tube will be described according to ASTM standard practice for <br /> description and identification of soils (ASTM D-2488-84). Stratigraphic, genetic and other <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 used <br /> with the uppermost tube for preparation of duplicates. These field observations will be noted <br /> on a log prepared for each boring/well <br /> During sampling, latex gloves will be worn to prevent cross-contamination with other samples <br /> The disposable gloves will be discarded after collecting samples from each 18-inch sample drive. <br />