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AEGIS EN VIRONMENTALDECI92 <br /> 1050 Melody Lane, Suite 160, Roseville, CA 95678 i 916. 782-2110fAL HEALTH 786-7830 <br /> PFr�AAIT/crn, <br /> December 31, 1992 <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton, California 95201 J <br /> Subject: Shell Service Station (WIC No. 204-7524-4404) <br /> 3011 West Benjamin Holt Drive, Stockton, California <br /> Site Code: 1883 <br /> Dear Mr. Infurna: <br /> Aegis Environmental, Inc. (Aegis), has received a copy of the letter, dated <br /> September 1, 1992, from the San Joaquin County Environmental Health Division <br /> (SJCEHD) to Shell Oil Company (Shell) requesting a 'Preliminary Investigation and <br /> Evaluation Report" (PIER) for the subject site. <br /> In response to the request for a PIER, Shell and Aegis have reviewed the environmental <br /> history of the site and wish to bring the following to the attention of the SJCEHD: <br /> 1) Applied GeoSystems (AGS) of Sacramento, California, conducted a subsurface <br /> investigation at the site in August 1988. The investigation included drilling and <br /> sampling four soil borings completed as groundwater monitoring wells. The results <br /> of the investigation were documented by AGS in a "Assessment of Soil and <br /> Groundwater Contamination" report, dated September 16, 1988. All soil and <br /> groundwater samples collected from the four borings/monitoring wells and <br /> analyzed were below the respective method detection and (Tri-Regional) practical <br /> quantitation reporting limits (PQL). Static groundwater in the new wells averaged <br /> about 13 feet below surface. The four monitoring wells were abandoned in late <br /> 1989. <br /> 89-0468.LTR <br /> GEOLOGISTS • ENGINEERS • GROUNDWATER SCIENTISTS <br />