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R yl <br /> Chevron Groundwater Monitoring Report(4Q2000) Page 2 of 2 <br /> Facility 49-9840-4344 Waterloo Road,Stockton,CA Date March 19,2001 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on December 14,2000 <br /> TPHg, benzene, and MtBE were reported in two of the three wells TPHg concentrations were reported at 186 ppb <br /> in MW-1 and 140 ppb in MW-2 Benzene concentrations were reported at 0 698 ppb in MW-1 and 1 10 ppb in <br /> MW-2 MtBE concentrations(by EPA Method 8260)were reported at 140 ppb in MW-1 and 28 ppb in MW-2 <br /> Groundwater elevations across the site increased an average of approximately 1 03 feet this quarter Groundwater <br /> flow was to the northeast at 0 002 ft/ft,consistent with historical data <br /> LIMITATIONS: <br /> i <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 /> I <br /> Sincerely, <br /> SECOR International Inc <br /> • �ROV. furor <br /> Associate Geologist <br /> ATTACHMENTS• <br /> • Attachment A—January 31,2001 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 />