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� 1 <br /> All wells will be installed using hollow-stem auger with continuous coring for logging and <br /> sampling. All wells will be four inch diameter PVC with factory slotted screens, Lonestar <br /> No. 2 sand filter packs, bentonite/grout seals, and below grade completions (see <br /> Attachment 4, Monitoring Well Design). Wells will be developed by swabbing with a <br /> surge-block and pumping with a submersible pump. <br /> Monitorina Procedures <br /> On a monthly basis, as long as the tanks are in service, the following procedures will be <br /> implemented for each well: <br /> 1. Water levels will be determined by sounding each well. Water depths will be <br /> recorded to the nearest tenth of a foot. A proposed data sheet is included as <br /> Attachment 5. <br /> 2. After determining water levels, each well will be sampled with a clear teflon <br /> bailer for the presence of product. Prior to sampling or monitoring of each <br /> well, the bailer will be disassembled, cleaned in a solution of trisodium <br /> phosphate (TSP), rinsed with acetone, followed by rinsing with clean water, <br /> and reassembled. <br /> 3. The bailer will be lowered into the well until it is submerged approximately <br /> halfway below the water surface. The objective is to capture a representative <br /> sample of the surface layer of water (and product if present) standing in the <br /> well. The bailer will then be retrieved. <br /> 4. The bailer contents will then be examined for floating product with the <br /> presence or absence of product being noted on the data sheet. Odor or water <br /> discoloration will also be noted. <br /> 5. If no product or odor is noted, the bailer water will be emptied into the <br /> nearest sanitary sewer. If odor is present, a ground water sample will be taken <br /> following steps 6-10 described below. If product is present, the reporting <br /> procedures described below will be followed. <br /> «��c=� Page 4 <br />