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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 /> July 11 , 1994 <br /> I <br /> ,john Cussen, President <br /> California Geophysical Group, Inc <br /> P 0 Box 691 <br /> Poway, CA 92074 <br /> Dear Mr Cussen, <br /> I apologize for not following up after our meeting with the RWQCB <br /> in February, but I became involved in several rather Large <br /> projects which took far more time and effort than I anticipated <br /> I understand that your client , Darpetro, is preparing to put in <br /> some additional groundwater monitoring wells in an attempt to <br /> further define the plume associated with their site at 749 E <br /> Charter Way, Stockton In order to assist you in that task, we <br /> have enclosed a site map showing the locations of the monitoring <br /> wells at 814 E Charter Way, together with a tabular listing of <br /> the results of groundwater sampling since October, 1992 The <br /> most recent hydraulic gradient determination is also shown on the <br /> map, all of the prior measurements have been essentially ident- <br /> ical As you can see, the levels of contamination have been <br /> rather erratic, but are very low compared to the levels you have <br /> been encountering at the Darpetro site <br /> If we can be of any further assistance , please do not hesitate to <br /> call <br /> SiYA <br /> 1 , <br /> Wmn e r <br /> cc nk Morita <br /> hael Collins <br /> i <br />