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Chevron Groundwater Monitoring Report(3Q2001) Page 2 oft <br /> Facility: #9-3232—8660 Lower Sacramento Road,Stockton,CA Date: October 8,2001 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc. on July 18, 2001. <br /> Groundwater samples were collected from three wells during this event. TPI-Ig was detected in samples collected <br /> from three wells,at concentrations of 68 µg/l in MW-1, 3,700 µg/l in MW-2 and 420 µg/1 in MW-3. Benzene was <br /> detected at concentrations of 0.94 µg11 in the sample collected from MW-1,480 gg/l in the sample collected from <br /> MW-2,and 36 µg/I in the sample collected from MW-3. MtBE was detected in the sample collected from MW-3 at <br /> a concentration of 7.9 pg/l, analyzed using EPA Method 8260. Depth to water across the site increased an average <br /> of approximately 4.32 feet this quarter. The groundwater flow direction was to the south at 0.003 ft/ft. <br /> LIMITATIONS: <br /> The findings presented in this letter are based on data and interpretations provided by Gettler-Ryan, Inc. Gettler- r <br /> Ryan's report is attached. The data presented in this summary is accurate only to the degree implied by the sources <br /> and methods used. No warranty,expressed or implied, is made by SECOR. <br /> Y <br /> If you have any questions,please feel free to call us at(916)861-0400. <br /> Sincerely, <br /> SECOR International Inc. <br /> A <br /> William E. Brasher, P.E. <br /> Project Manager <br /> ATTACHMENTS: G <br /> • Attachment A—August 16,2001 Groundwater Monitoring& Sampling Report by Gettler-Ryan Inc. <br /> cc: Bob Cochran,Chevron Products Company, P.O. Box 6004, San Ramon, CA 94583-0804 <br /> Marty.Hartzell, RWQCB-CVR,3443 Routier Road, Suite A, Sacramento,Ca 95827 <br /> Richard Berger, Berger&Company,667 East Canal Drive,Turlock,CA 95380-4095 <br /> r <br /> j <br /> i <br />