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r, <br /> Chevron Groundwater Monitoring Report(1Q2001) Page 2 of <br /> Facility #9-8264-3775 Tracy Boulevard,Tracy CA Date April 12,2001 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on February 21,2001 Four <br /> wells were sampled during this event TPHd and TPI-Ig were reported in MW-4 at concentrations of 21,000 ppb <br /> and 26,000 ppb, respectively Benzene was reported at a concentration of 170 ppb in MW-4 MtBE was reported at <br /> concentrations of 11,000 ppb in MW-2 and 950 ppb in MW-4 Groundwater analytical results were generally <br /> consistent with historical data Groundwater elevations across the site increased an average of approximately 0 46 <br /> feet this quarter Groundwater flow was to the east to southeast at 0 002 to 0 003 ft/ft,generally consistent with <br /> historical data <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 /> Ro er Hoffmore <br /> Project Manager <br /> ATTACHMENTS- <br /> • Table 1 —Screen Intervals <br /> • Attachment A—March 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 />