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iN (f <br /> Chevron Quarterly Groundwater Monitoring Report(3Q2000) Page 2 of 2 <br /> Facility 49-8032—575 Grant Line Road Tracy CA Date Decemb�r-13 2000 � <br /> ~�` e <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on August I 1 and 22, 2000 <br /> Four wells and a sump were sampled during this event TPHd (unidentified hydrocarbons <C16)was reported in <br /> two wells at concentrations of 72 ppb in MW-4 to 410 ppb in MW-3 TPHg was reported in two wells at <br /> concentrations of 830 ppb in MW-4 and 2,400 ppb in MW-3 Benzene was reported in three wells at concentrations <br /> of 74 ppb to MW-2, 150 ppb in MW-3, and 220 ppb in MW-4 MtBE was reported in all the wells at <br /> concentrations ranging from 8 6 ppb in MW-1 to 2,100 ppb in MW-3 A sample from the sump was reported non <br /> detectable for TPHg, BTEX, MtBE, and oil and grease with the exception of 0 57 ppb benzene Analytical results <br /> for this quarter show a general increase in concentrations in MW-3 and MW-4, and a general decrease in MW-1 and <br /> MW-2 Groundwater elevations across the site decreased an average of approximately 0 39 feet this quarter <br /> Groundwater flow was to the northwest 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- <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 H mor <br /> Project Manager <br /> ATTACHMENTS: <br /> • Attachment A--November 3,2000 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 /> Rudy Sanchez, Tracy Express Wash& Lube,2480 Tracy Boulevard,Tracy, CA 95376 <br /> Stella Rickman, P O Box 244, Tracy, CA 95378 <br /> Kathryn Pudenz,4350 Kirkham Street, Apt 304, San Francisco, CA 94122 <br />' i <br />