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ry 11 <br /> Chevron Quarterly Groundwater Monitoring!Rt(2Q2000) Page 2 of 2 <br /> Facility 49-9840-4344 Waterloo Road,Stockton,CA Date November 10,2000 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on June 22,2000 Three <br /> wells were sampled during this event TPHg, BETX, and MtBE were reported in two of the three wells TPI-Ig <br /> concentrations were reported at 62 ppb in MW-2 and 160 ppb in MW-1 Benzene concentrations were reported at <br /> 6 8 ppb in MW-1 and 19 ppb in MW-2 MtBE concentrations(by EPA Method 8260)were reported at 7 1 ppb in <br /> MW-2 and 240 ppb in MW-1 Analytical results for this quarter show an increase in concentrations in MW-1 and a <br /> decrease in MW-2 Results for MW-3 reported non detectable levels, which is consistent with historical data <br /> Groundwater elevations across the site decreased an average of approximately 145 feet this quarter Groundwater <br /> flow was northerly at 0 01 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 /> Ro er Hoffmo <br /> Project Manager <br /> ATTACHMENTS- <br /> 0 Attachment A—October 6,2000 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 /> Mike Infurna, San Joaquin Count Public Health Services, 304 E Weber Ave ,3rd Floor, Stockton, CA <br /> Greg Gurss, Gettler-Ryan Inc,3164 Gold Camp Drive, Suite 240 Rancho Cordova, CA 95670 <br />