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KEI-P89-1104 . P2 <br /> January 10, 1990 <br /> Page 4 <br /> Casing Type: Schedule 40 PVC, flush threaded joints, 0. 02 <br /> inch factory slot, two-inch diameter. Screen to run from <br /> total depth of the well to approximately five feet above the <br /> first encountered groundwater. Monterey sand (#3) will fill <br /> the annular space from total depth to two feet above the <br /> screened interval. A two foot thick bentonite seal will be <br /> placed in the annular space on top of the sand pack. <br /> Concrete will be poured from the top of the bentonite seal <br /> to the surface. A schematic well completion diagram is <br /> included for your review. <br /> Well casings will be secured with a waterproof cap and a <br /> padlock. A round, watertight, flush-mounted well cover will <br /> be concreted in place over the top of the casing. <br /> C. Wells will be checked for depth to the water table, the <br /> presence of free product and sheen (using an interface probe <br /> and/or paste tape) prior to both development and sampling. <br /> Water levels will be measured with an electronic sounder. <br /> The wells will be developed using a surface pump <br /> approximately one week after well completion. Wells will be <br /> pumped until expelled water is clear and free of turbidity. <br /> Effluent generated during well development will be contained <br /> in barrels and hauled from the site by a licensed hazardous <br /> materials hauler. <br /> Casing elevations will be surveyed to an assumed datum. <br /> The wells will be purged with a surface bailer approximately <br /> four casing volumes prior to sampling, at least 24 hours <br /> after development. After recovery, samples will be col- <br /> lected using a clean Teflon bailer and will be promptly <br /> decanted into 40 ml VOA vials and/or one liter amber bottles <br /> as appropriate. Vials and/or bottles will be sealed with <br /> Teflon-lined screw caps, labeled and stored on ice for <br /> delivery to a state certified laboratory. Properly executed <br /> chain of custody documentation will accompany all samples. <br /> The sampling bailer will be cleaned with soap and a clean <br /> water rinse between uses. <br /> Selected soil and all water samples will be analyzed by <br /> Sequoia Analytical Laboratory in Redwood City, California, a <br /> state certified laboratory, for TPH as gasoline using EPA <br /> method 5030 in conjunction with modified 8015 and BTX&E <br /> using EPA method 8020. In addition, the samples from MW1 <br /> will be analyzed for TPH as diesel using EPA methods <br /> 3550/3510 in conjunction with modified 8015, total oil and <br /> grease (TOG) using EPA method 418 . 1 with clean up, and <br />