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Appropriately sealed and labeled samples will be placed in cooled ice chests. The ice chests will <br />also serve as containers for shipping samples to the analytical laboratory. Chain-of-custody records will <br />be maintained using standard forms, and routed to the analytical laboratory with the sealed ice chests <br />containing the samples. <br />B.1.3 Quality Control Samples <br />To evaluate the precision of the analytical laboratory, approximately one soil sample will be <br />duplicated for each of the analyses. The duplicate sample will be identified as an alternate sample <br />location (with either an A or a B designation) and analyzed at the laboratory for the same parameter as <br />the actual sample. <br />B.1.4 Equipment Decontamination <br />All downhole drilling equipment and tools will be steam cleaned between borings. A clean area <br />on-site will be designated as the steam cleaning station. The rinsate generated during steam cleaning will <br />be contained in a horse trough and transferred into DOT approved 55-gallon containers. <br />After each use, samplers will be washed thoroughly in a detergent solution, rinsed with fresh <br />water, and final rinsed with distilled water. <br />B.2 MONITORING WELL SPECIFICATIONS <br />B.2.1 Monitoring Well Installations Utilizing Auger Drilling Methods <br />Wells installed by augerocilLilling methods will be constructed of 4-inch diameter flush-threaded <br />Schedule 40 PVC casing and .0yatinch slotted well screen. Since all casing material is flush threaded, <br />no chemical bonding agents will be used during their assembly. All casing, filter pack and sealing <br />materials will be placed into the bore hole with the augers in place. It is estimated that approximately <br />15 feet of well screen will be used in the wells. Because the depth to groundwater is reportedly very <br />shallow and is influenced by tidal action, it is estimated that the screen will extend from approximately <br />4 to 19 feet below ground surface. <br />PROP06.005 <br /> B-3 <br />DAMES & MOORE