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IWO, <br /> APR 0 8 1993 <br /> ENVIRONMENTAL HEALTH <br /> AEGIS ENVIRONMENTAL , 09WAIVSERVICU <br /> 1050 Melody Lane,Suite 160, Roseville, CA 95678 + 11 916.782-21101916.969-21101 FAX 916.786-7830 <br /> F <br /> April 6, 1993 <br /> Ms. Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> Subject: Frank's Exxon #4 <br /> 14800 Frontage Road, Manteca, California <br /> Dear Ms. Lagorio: <br /> Aegis Environmental, Inc.- (Aegis), on behalf of!!Moore Petroleum, Inc., is pleased to <br /> respond to your correspondence, dated March 12, 1993 (attached), and our phone <br /> conversation on March 19, 1993. <br /> In the March 12, 1993, letter, additional analyses were requested; total petroleum <br /> hydrocarbons (TPH), as diesel, and 1,2-dichlor6ethene (EDC). Analysis for TPH, as <br /> diesel, will be performed on samples from MW-1';through MW-4 beginning with the next <br /> scheduled quarterly groundwater sampling event; Tuesday, April 6, 1993. -Analysis for <br /> EDC will resume on samples from MW-1 through.MW-5 collected during the 'same event. <br /> Also requested, was that the domestic well be sampled periodically fo-'r the same <br /> constituents. The on-site domestic well will b6 sampled and those samples <br /> pies will be <br /> analyzed for TPH, as gasoline and diesel, benzeni,e, toluene, ethylbenzene, total xylenes, <br /> h <br /> and EDC. This will continue on a periodic basis.' <br /> .In addition, a request was made for information regarding the domestic wells located near <br /> the subject site. This information has been collected as part of the ongoing investigation. <br /> The next quarterly groundwater monitoring reportWill include a discussion of the domestic <br /> wells within a 1/2-mile-radius of the site. <br /> 90-097CC.LTH <br /> GEOLOGISTS ENGINEERS GRIOUNDWATER SCIENTISTS <br />