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w.d <br /> San Joaquin County DIRECTOR <br /> Donna Heran, REHS <br /> Environmental Health Department j•.• ,�_ ••_p I' ASSlSTANTDIRECTOR <br /> r. 600 East Main Street Laurie Cotulla,REHS <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> .• Mike Huggins, REHS, RDI <br /> Margaret Lagorio, REHS <br /> 0.- • �, -��P Website: www.sjgov.org/ehd Robert McClellon, REHS <br /> 9�1FijR Phone: (209)468-3420 Jeff Carruesco, REHS, RD[ <br /> Fax: (209) 464-0138 Kasey Foley,REHS <br /> July 1, 2009 <br /> Jonathan Marlowe <br /> Marlowe Property <br /> 838 Mission Avenue <br /> San Rafael, CA 94901 <br /> Subject: Marlowe Property Site Code: 1828 <br /> 4696 Waterloo Road <br /> (formerly 4649 Waterloo Road) <br /> Stockton, CA 95215 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the file for the <br /> above referenced contaminated underground storage tank (UST) site and has the following <br /> comments. <br /> One UST used to store leaded gasoline was removed from this site in 1988. A minor excavation <br /> of soil was conducted after the tank removal. A site investigation was initiated in July 1988 and <br /> has been ongoing since that time. Interim remediation by soil vapor extraction was performed in <br /> 1999. Currently the only contaminant of concern is 1,2-dichloroethane in the groundwater at <br /> concentrations ranging from non-detect at <.5 micrograms per liter (pg/1) to 13 pg/1 (MW-13). <br /> The State Water Resources Control Board (SWRCB) has issued a resolution that all <br /> contaminated underground storage tank (UST) sites currently in the UST Cleanup Fund <br /> program be evaluated for closure. In order for this evaluation to be made for your site, please <br /> submit a Closure Report which includes: <br /> 1. A calculation of contaminant mass remaining in both soil and groundwater. <br /> 2. A demonstration that the vertical extent of the impacted media has been defined. <br /> 3. A prediction of how long (in years) it will be until the dissolved contaminant <br /> concentrations onsite will reach water quality goals. <br /> 4. An evaluation of the potential vapor intrusion threat from the remaining <br /> contamination in both soil and groundwater. <br /> 5. Confirmation that a sensitive receptor survey has been completed for the site. <br /> 6. All other requirements of the Tri-Regional Guidelines Appendix A. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Lori Duncan, REHS Margaret agorio, REHS <br /> Senior Registered Environmental Health Specialist Program Coordinator <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive Ste, 200, Rancho Cordova CA 95670 <br /> Brian Millman, AGE, 837 Shaw Road, Stockton CA 95215 <br />