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*MVPa e 2 of 2 <br /> Chevron Quarterly Groundwater Monitoring Report(3Q2000) g <br /> Facility: 494054—2103 Country Club Boulevard,Stockton,CA Date: January 23,2001 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc. on August 25,2000. Eleven <br /> wells were sampled during this event(MW-4 was inaccessible). TPHg and benzene were reported in seven of the <br /> wells sampled. TPHg concentrations ranged from 96 ppb in MW-7 to 46,000 ppb in MW-1. Benzene <br /> concentrations ranged from 7.2 ppb in MW-7 to 7,200 ppb in MW-2. MtBE was reported in four wells at <br /> concentrations ranging from 4.0 ppb in MW-7 to 260 ppb in MW-6. Groundwater analytical results were generally <br /> consistent with historical data except for a decrease in concentrations in MW-8. Groundwater elevations across the <br /> site decreased an average of approximately 2.29 feet this quarter. Groundwater flow was to the northwest to <br /> northeast at 0.002 ft/ft. <br /> LIMITATIONS: <br /> The findings presented in this letter are based on data and interpretations provided by Gettler-Ryan, Inc. Gettler- <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 /> If you have any questions,please feel free to call us at(916)861-0400. <br /> Sincerely, <br /> SECOR International Inc. <br /> ott Gable <br /> Senior Geologist <br /> ATTACHMENTS: <br /> Attachment A—November 16,2000 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 /> Patrick Craig, 1011 South Tuxedo Avenue,Stockton,CA 95204 <br /> Ronald Berberian and Joan McNabb,2021 W.March Lane,Suite 2A,Stockton,CA 95207 <br /> Robin Ringstad,2421 Franklin, Stockton,CA 95204 <br />