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I <br /> In —py <br /> FL <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst M.D. M.P.H. Health Officer <br /> 304 East Weber Avenue, Third Floor • Stock on, CA 95202 Q` ,o � <br /> 209/468-3420 <br /> I <br /> UNOCAL CORP FEB 1 3 2001 <br /> W T NICK NICKERSON <br /> 8788 ELK GROVE BLVD BLDG 3 STE 15 <br /> ELK GROVE CA 95624 <br /> I <br /> RE: Unocal#0123 (former) SITE CODE: 505099 <br /> 1034 Central Ave. R0#:000616 <br /> Tracy,CA.,95376 <br /> San Joaquin County Public Health Services,Environmental Health Division (PHS-EHD) has <br /> reviewed the "Monitoring Well Installation Report" dated January 17,2001 as submitted by Gettler- <br /> Ryan Inc. (GRI) on January 19,2001 and has the following comments. <br /> The report details the installation of monitoring wells "U 7 and U-8" in the City of Tracy right of <br /> ay at the intersection of 11th street and Central avenue. <br /> wSoil and groundwater samples collected for <br /> these wells on November 13,2000 indicate that the petroleum plume has been delineated in all <br /> quadrants around the site. <br /> PHS-EHD agrees with your conclusions that the site is adequately investigated and that no <br /> remediation is required. In order to fully evaluate this site,a Request for Closure Report should be <br /> submitted following the reporting format detailed in the "Appendix B- Request for Closure,Tri- <br /> Regional Guidelines". <br /> PHS-EHD will evaluate the report and if approved,formally request concurrence from the Central <br /> Valley Regional Water Quality Control Board(CVRWQB). If the CVRWQCB concurs with the no <br /> further action decision,you will advised to properly destroy the wells associated with this site or <br /> submit a groundwater monitoring plan for the continued sampling and reporting of the groundwater <br /> status. <br /> Until directed otherwise byPHS-EID,continue to monitor and report on the groundwater <br /> conditions (Quarterly Reports) at this site- <br /> You may contact Michael Infurna at (209) 468-3454 if you have any questions. <br /> Donna Heran,REDS,Director <br /> i <br /> Environmental Health Division <br /> i <br /> Michael J.Infu na r.,Senior REHS Margaret Lagorio,RE <br /> LOP/ Site Mitigation Unit IV LOP/Unit IV Supervisor <br /> MI/ <br /> C: CVRWQCB-Marty Hartzell,Sacramento. <br /> C; Gettler-Ryan-David Herzog,3164 Gold Camp Dr.,#240,Rancho Cordova,95670. <br /> c: Kimberly Ayers &Leesa Ward-Real Estate Office, 1034 Central.Ave,Tracy,95736. <br /> A Division of San Joaquin County Health Care Services <br /> 1 <br />