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ALTON GEOSCIENCE <br /> GENERAL FIELD PROCEDURES <br /> FOR <br /> GROUND WATER MONITORING WELL SAMPLING <br /> Ground water monitoring and sampling were performed in <br /> accordance with the requirements and procedures of the Regional <br /> Water Quality Control Board (RWQCB) . Prior to purging and <br /> sampling each well, total well depth and depth to ground water <br /> was measured to the nearest 0. 01 foot from a reference mark at <br /> the top of each well casing using an electronic sounder. <br /> Before sample collection, the well was purged of the required <br /> well casing volumes or until stabilization of pH, temperature, <br /> and conductivity was achieved. Purging was accomplished using <br /> either a clean bailer or pump. <br /> Ground water samples were collected using a clean bailer, and <br /> then carefully transferred into the appropriate clean, laboratory <br /> supplied containers. The sampler wore nitrile gloves at all <br /> times during purging and well sampling. <br /> Ground water samples were handled and preserved in accordance <br /> with Regional Water Quality Control Board guidelines. The <br /> samples were clearly labeled with the well number, site <br /> identification, date and time of sample collection, sampler's <br /> initials, and transported to a California-certified laboratory <br /> following proper preservation and chain of custody protocol. <br /> The water generated from the development process was placed into <br /> labeled 55-gallon drums, pending laboratory results of the ground <br /> water samples, to determine the appropriate disposal method. <br /> Disposal of purged water was in accordance with applicable <br /> regulatory requirements. <br />�r <br />