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IZ <br /> ,7une 1, 198& AGS Job No. 038032-2 <br /> UNOCAL Service Station No. 6981, Stockton, California <br /> measurement, tl;e wells will be developed prior to water sampling <br /> by surge pumping, or other suitable method. Following ground- <br /> water recovery to static conditions, the wells will be sampled <br /> using a Teflon bailer cleaned with Alconox and deionized water. <br /> The bailer will be used first to obtain a sample from the surface <br /> of the water in the wells prior to purging. Any subjective <br /> evidence of product detected in the well wills be recorded. <br /> If no floating product is observed in the wells, a formation <br /> water sample will be collected after purging operations. <br /> Approximately three to four well volumes of water will be purged <br /> from the wells prior to sampling using a submersible puma. <br /> Purging operations will continue until constant pH and <br /> temperature are reached. If floating product is encountered in a <br /> well, the well will trot be purged or sampled. <br /> The water samples wi':i be sealed in laboratory-cleaned glass <br /> vials with Teflon-lined lids, labeled, and immediately placed in <br /> iced storage. Chain of Cuetody Records will be initiated by the <br /> to sampler in the field and will accompany the samples to the <br /> analytical laboratory. Copies of the Chain of Custody Records <br /> will be included in our Final report. <br /> M --------------- <br /> 13 <br /> Ait�iv//62of G490S <br /> ysmalns <br />