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11 &x <br /> FIELD PROCEDURES <br /> The depth of the ground-water surface in a monitoring well is measured from the top of the <br /> well casing to the nearest 0.01 foot with a Solinst water-level indicator. <br /> Samples of ground water were taken from the monitoring wells for subjective analysis by <br /> lowering approximately half the length of a clean Teflon bailer past the air-water interface. <br /> The bailer was retrieved and the water examined for floating product, sheen, and other <br /> subjective evidence of hydrocarbons. <br /> Approximately 3 well volumes of ground water were purged from the wells using;+n electric <br /> submersible pump;purging continued until temperature,pH, and conductivity to stabilized. <br /> The wells were allowed to recover to near static water levels. The water was collected by <br /> lowering a clean Teflon bailer past the air-water interface to a depth just below the to;, of <br /> the water column. The bailer was retrieved and the sample carefully transferred to <br /> laboratory-cleaned glass vials that contained hydrochloric acid as a preservative. The vials <br /> are filled so as to prevent headspace. The vials are labeled with the site identification <br /> number, the date and time of sample collection, the preservative used, and the sample <br /> identification number. The samples are promptly placed in iced storage for delivery to a <br /> laboratory certified by the State of California. <br /> AWl ed C d9i0SYSMfJ7e <br />