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Al) <br /> San Joaquin County DIRECTOR <br /> Q u 1 N Donna Hera n, REHS <br /> a Environmental Health -Department <br /> �0� 0G ASSISTANT DIRECTOR <br /> s `"r 2 600 East Main Street Laurie Cotuua, REHS <br /> T Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Mike Huggins, REHS,RDI <br /> Margaret Lagorio,REHS <br /> Cq I F O R��P website: www.sjgov.org1ehd Robert McClellon,REHS <br /> Phone: (209)468-3420 .teff Carruesco, REHS, RDI <br /> Fak: (209)464-0138 Kasey Foley, REHS <br /> April 28, 2009 <br /> Ken Hilliard Kendall Young <br /> 7-Eleven Inc. YLY LLC <br /> PO Box 711 720 York Street <br /> Dallas, TX 95221-0711 San Francisco, CA 94110 <br /> Subject: 7-Eleven Store #32262 Site Code: 1505 <br /> 2360 Grant Line Road <br /> Tracy, CA 95376 <br /> San Joaquin County Environmental Health Department (SJC/EHD) has reviewed Quarterly <br /> Groundwater Monitoring Report; Fourth, Quarter 2008 (Report) dated February 18, 2009, <br /> submitted on your behalf by Stantec Consulting Corporation (Stantec) and has the following <br /> comments. <br /> The investigation of this contaminated underground storage tank site (UST) began in 2003 <br /> with the installation of groundwater monitoring wells. Routine quarterly groundwater <br /> monitoring and sampling has been conducted since that time. Reported analytical results <br /> I indicate that the plume of contamination is stable and declining. <br /> The EHD has discussed the status of this site with a representative from the Regional Water <br /> Quality Control Board, Central Valley Region (CVRWQCB) and they agreed that the site may . <br /> be a candidate for closure. Please proceed with preparation of a closure report that includes <br /> a calculation of contaminant mass remaining at the site in soil and groundwater, a model <br /> predicting how long.it will be until dissolved contaminant concentrations reach water quality <br /> goals, a discussion of the potential threat from vapor.intrusion, and all requirements listed in <br /> the Tri-Regional Guidelines Appendix A. The closure report is due for submittal to the EHD <br /> no later than July 3,2009. <br /> i <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Sincerely, <br /> t <br /> Lori Duncan, REHS Margare agorio, REHS <br /> Registered Environmental Health Specialist Program Coordinator <br /> c: Jim Barton, CVRWQCB, 11020 Sun Center Drive Ste. 200, Rancho Cordova, CA 95670 <br /> Damon Brown, Stantec, 3017 Kilgore Road Ste. 100, Rancho Cordova, CA 95670 <br />