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IS fEC ® R <br /> Mr Wong <br /> July 3, 2003 <br /> Page 3 - fl <br /> r <br /> Supply Well Location Survey Forms used during the survey are Included in Appendix F No <br /> additional water wells were discovered during the door-to-door well search 1' <br /> i <br /> RECOMMENDATIONS <br /> I <br /> Based on the data presented above, SECOR recommends quarterly groundwater monitoring of MW- <br /> 1, MW-2, MW-3, and newly Installed well MW-4 for one year to verify existing groundwater analytical <br /> results SECOR will petition for the closure of this site if four consecutive quarters of groundwater i y <br /> monitoring verify that maximum contaminant levels of benzene and MtBE are not exceeded <br /> If there are any questions regarding this report please contact Greg McIver of SECOR at (916) 861- <br /> Y I <br /> 0400 extension 279 or Robert J (Bob) Cochran of Chevron at (925) 842-9655 <br /> Sincerely, ED G <br /> SECOR Interpgtionall Incorporated <br /> f uC0 f � <br /> ¢� AS LE <br /> o No <br /> M y Krnbst <br /> colt Gable 0 <br /> S# ff Sc Senior Geologist 9 Ex -i <br /> I <br /> MIK SOF CAS-��O ' d <br /> Attachments Table 1 - Sensitive Receptor Survey Summary Table <br /> Figure 1 - Site Location Map <br /> Figure 2-Site Plan <br /> Figure 3 -2,000-foot Well Search Map <br /> Attachment A-Summary of Previous Investigations <br /> Attachment B -Field and Laboratory Procedures <br /> Attachment C-Boring Log, MW-4 <br /> Attachment D-Laboratory Analytical Data and Chain-of-Custody Documentation <br /> Attachment E-Department of Water Resources Drillers Well Logs <br /> Attachment F-Water Supply Well Survey Location Forms i' ; <br /> S <br /> 3i c <br /> cc Mr Jim Barton, RWQCB - CVR, Sacramento, CA 95827-3098 <br /> Mr Bob Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Mr Steven Clair, Clair& Bossl, Stockton, CA 95207 <br /> Mr Sherman Hlnaman, Gridley, CA , <br /> ,{h <br /> J I <br /> T <br /> I <br /> F <br /> 1%Chevron1962581REPORT5ISAR_2003 doc SECOR Intemationa!Incorporatad <br />