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I� <br /> f <br /> then collected from the surface of the water in each of the wells with the Teflon bailer and <br /> I slowly transferred to laboratory-cleaned sample containers <br /> Sample Labeling and Handling <br /> Water samples were preserved in laboratory-cleaned, 40-milliliter glass vials that contained <br /> concentrated hydrochloric acid as a preservative The water samples were sealed with <br /> Teflon-lined lids to eliminate air bubbles The sample containers were labeled in the field <br />' with the site identification, monitoring well number and depth, and date, and promptly <br /> placed in iced storage for transport to the laboratory The geologist initiated <br /> chain-of-custody records in the field that accompanied the samples to a laboratory certified <br /> I by the state of California for the analyses requested Samples were transported to the <br /> laboratory promptly Samples in our custody were properly disposed of after their useful <br /> life had expired <br /> 1 <br /> Evaluating the Groundwater Flow Direction and Gradient <br /> The elevations and positions ("x" and "y" lateral coordinates) of the monitoring well were <br /> surveyed by a licensed land surveyor The elevations of the monitoring wells were <br /> liereferenced to within 0 01 foot of the bench hark The horizontal distances were measured <br /> to the nearest 0 1 foot The elevations were taken to either the notch or the arrow on the <br /> well casing <br /> IThe groundwater elevations for each monitoring well were calculated by subtracting the <br /> depth to water from the wellhead elevation The groundwater elevation information was to <br />' construct a potentlometnc surface map, which was used to evaluate the direction of <br /> groundwater flow and the magnitude of the groundwater gradient <br /> 1 <br /> IT CORPORATION <br /> SAC W lrancfpI\projects\Projects1880\03911A\Quarter1ys12g01 doc-Op1wk 1 <br />