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i • <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> 600 East Main Street <br /> y Stockton, California 95202-3029 PROGRAMCOORRS <br /> ` Robert McClellon, REHS <br /> Jeff Carruesco,REHS, RDI <br /> Kasey Foley, REHS <br /> c°<lkoa� c Website: www.sjgov.org/ehd Linda Turkatte,REHS <br /> Phone: (209)468-3420 <br /> Fax: (209) 464-0138 <br /> January 26, 2012 <br /> Wayne Henry <br /> Fremont Gate LLC <br /> PO Box 5221 <br /> Modesto, CA 95355 <br /> Subject: United Rentals <br /> 2911 East Fremont Street <br /> Stockton, CA 95202 <br /> Dear Mr. Henry, <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the <br /> January 11, 2012 response letter submitted on your behalf by Lee & Pierce, Inc. and has the <br /> following comments. <br /> The EHD acknowledges and appreciates the responses submitted by Lee & Pierce, Inc. but <br /> still has concerns with contaminant sources and the potential risk they present. Per DTSC <br /> guidance, the EHD recommends one additional round of indoor air sampling and collection of <br /> a subsurface soil gas sample from the excavation pit area to compare constituent <br /> characteristics and concentrations with the indoor air samples. Prior to sample collection all <br /> potential sources of volatile contaminants should be removed from the building and the <br /> space be allowed to air out. If the subsurface soil gas sample has substantially different <br /> composition or has lower contaminant concentrations than the indoor air sample, then vapor <br /> intrusion would not appear to be an issue. <br /> If you have any questions please contact Lori Duncan at (209) 468-0337 or by email at <br /> Iduncan(DDslcehd.com. <br /> Sincerely, <br /> Lori Duncan, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: John Lane, Lee & Pearce, 334 South Yosemite Avenue, Suite A-1, Oakdale, CA 95361 <br />