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Testing and Materials (ASTM) Methods D 1586-84 for split <br />barrel sampling of soil and D 1587-83 for thin-walled tube <br />sampling of soils. The blows required to drive the sampler <br />each six inch interval will be recorded on the boring log. <br />The sampler will be removed from the boring and opened to <br />reveal the brass tubes. The bottom tube will be sealed with <br />aluminum foil and plastic end caps, taped and labeled with <br />the following information: date, time, project ID, sample <br />ID, name of sampler and type of analysis. This sample will <br />be immediately placed into a cooler containing dry'ice or <br />frozen chemical. A "high -low" temperature recording <br />thermometer will accompany sample shipments to ensure proper <br />temperature maintenance. The samples will be delivered to <br />a state certified laboratory following under chain -of - <br />custody protocol within 48 hours of sampling, whenever <br />possible. <br />Soil in the uppermost brass tube will be described according <br />to ASTM standard practice for description and identification <br />of soils (ASTM D-2488-84). Stratigraphic, genetic and other <br />data/interpretations will also be recorded. Soil properties <br />may also be determined from the middle brass tube and from <br />the sampler shoe. Alternatively the second sample tube may <br />be used with the uppermost tube for preparation of <br />duplicates. These field observations will be noted on a log <br />prepared for each boring/well. <br />During sampling, latex gloves will be worn to prevent cross - <br />contamination with other samples. The disposable gloves <br />will be discarded after collecting samples from each 18 -inch <br />sample drive. <br />Soil samples will be collected at five foot intervals, at <br />significant changes in; lithology and intervals of obvious <br />contamination in order to develop a complete profile of soil <br />contamination. <br />11.2 Sample Collection During Tank Removal <br />Soil samples will be collected as soon as possible after <br />removal of the tank. Where feasible, all preparations for <br />soil sampling will be made prior to tank removal. Soil <br />samples collected from a backhoe bucket or directly from the <br />excavation floor will be collected in a thin-walled <br />stainless steel or brass cylinder at least three inches long <br />by one inch in diameter. From 3 to 24 inches of soil will <br />be removed from the immediate surface area where the sample <br />is to be taken and the' cylinder then pounded into the soil <br />with a wooden mallet, bulk density driver, or other <br />decontaminated driving device. No head space will be <br />present in the cylinder once the sample is collected. Care <br />will be taken to avoid contamination of both the inside and <br />outside of the cylinder as well as its contents. During <br />