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F <br /> r <br /> 1050 Melody Lane. Suite 1 �-�� s�yN!_t ;, #ifornia 95678 <br /> . EG, (976)7a2 2990 �('976)786 7830 <br /> ENVIRONMENTAL, INC. c J1�� "�' '` 5$ <br /> July 19, 1993 <br /> Mr Lynn Walker <br /> Shell Oil Company <br /> Post Office Box 5278 <br /> Concord, California 94520 <br /> Subject. Quarterly Groundwater Monitoring Report <br /> Former Shell Service Station (WIC No 204-7524-1509) <br /> 141 N EI Dorado, Stockton, California <br /> • Dear Mr Walker. <br /> Aegis Environmental, Inc (Aegis), is pleased to provide Shell Oil Company the attached <br /> information documenting the results of quarterly groundwater monitoring, conducted on <br /> May 26, 1993, at the subject site by Blaine Tech Services, Inc , of San Jose, California <br /> A soil venting system with granular activated carbon (GAC) emissions control and <br /> groundwater recovery/sewer discharge are currently in operation The groundwater <br /> recovery system operation (pumping from wells RW-1 and RW-2) commenced on <br /> March 2, 1993 The existing venting system operation (extraction from VP-1, VP-2, VP-3, <br /> and VP-4) commenced on June 23, 1993, after GAC replacement. Remediation system <br /> monitoring is being performed per regulatory requirements <br /> The interpretations and conclusions contained within the attachments represent our <br /> professional opinions These opinions are based on currently available information and <br /> were developed in accordance with currently accepted geologic, hydrogeologic, and <br /> engineering practices at this time and for this specific site Other than this, no warranty <br /> is implied or intended. <br /> 93-011A.QMR / <br /> f <br />