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i . <br /> Wm. J. Hunter & Associates 2220 Loma Vista Dr. <br /> Registered Geologists Sacramento, CA 95825 <br /> Petroleum & Mineral Appraisers (916) 972-7941 <br /> FAX (916) 972-1683 <br /> March 14, 1996 <br /> Joel M. Weiss, Engineering Geologist <br /> CRWQCB, Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3098 <br /> Ref : 1145 W. Charter Way, Stockton, CA <br /> Dear Mr. Weiss; <br /> On March 1, 1996, the site of the large magnetic anomaly detected <br /> by the geophysical survey conducted on Feb. 6 was excavated by <br /> Jim Thorpe Oil under my direction. The "large" anomaly turned <br /> out to be a 201 length of ill diameter metal conduit which <br /> terminated about 2 feet east of monitoring well #1 . It was about <br /> 1211 below ground level, and appeared to extend beneath the shop <br /> building. It had a threaded nipple on the west end, and there <br /> was no indication that it continued in that direction. The <br /> conduit was empty; no wires were present, although it may have <br /> been used for that purpose in the past . <br /> After removing most of the conduit with the backhoe, the exca- <br /> vation was deepened to about 5-6 feet in order to determine the <br /> possible existence of unknown buried tanks . There was no evi- <br /> dence of any such vessels, and the soil beneath the conduit was <br /> native material, which appeared to be undisturbed. <br /> Because the two smaller anomalies detected on the south side of <br /> the building were considerably weaker than the one excavated, it <br /> was decided not to excavate in those areas . The excavation was <br /> filled in and compacted and no further work was done. <br /> The result of this work, and the fact that the two quarterly <br /> monitoring events performed to date showed only minor amounts of <br /> contaminants in either MW-1 or MW-2, suggests that the source of <br /> those compounds most likely was caused by the major contamination <br /> encountered during excavation of the leach field in this area. <br /> Although we have selected the drilling contractors and other <br /> vendors to perform the next stage of the work, we have not <br /> received a response from the Cleanup Fund staff of the pre- <br /> approval request package that has been submitted to them. Until <br /> our client receives a reply to that request, he is reluctant to <br /> proceed with the work. When approval is granted, we will <br /> schedule the work as quickly as possible. <br /> Due to events beyond our control, the original time shedule we <br /> 1 <br />