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described above under "Groundwater Grab Samples", and then packed on ice and sent to the <br /> laboratory for analysis. Groundwater samples will be transported to the laboratory and analyzed <br /> it within the EPA-specified holding time for requested analysis. <br /> Each sample container submitted for analysis will have a label affixed to identify the job number, <br /> sample date, time of sample collection, and a sample number unique to that sample. Samples f <br /> will be analyzed by a California-certified laboratory. <br /> A chain-of-custody form will be used to record possession of the sample from time of collection <br /> to its arrival at the laboratory. When the samples will be shipped, the person in custody of them <br /> will relinquish the samples by signing the chain-of-custody form and noting the time. The <br /> sample control officer at the laboratory will verify sample integrity and confirm that it was <br /> collected in the proper container, preserved correctly, and that there is an adequate volume for <br /> analysis. <br /> 7.0 GROUNDWATER DEPTH EVALUATION <br /> Depth to groundwater will be measured to the nearest 0.01 foot using an electronic hand-held <br /> water level indicator. The top of the probe will be examined to evaluate whether a product sheen <br /> is present. <br /> 8.0 SURVEYING <br /> The top of each new well riser will be surveyed to allow correlation of the groundwater levels at <br /> the site. The surveyed point of each well riser will be marked to help insure future groundwater <br /> level measurements are taken from the same location. Elevations will be surveyed relative to the <br /> benchmark to the nearest 0.01-foot. <br /> 3001-11b.wp HORIZON ENVIRONMENTAL INC. <br />