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San Joaquin County DIRECTOR <br /> Q'P° " ' " Environmental Health Department Donna Heran , REHS <br /> c N ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla, REHS <br /> }„ ii� � < Stockton , California 95202 -3029 PROGRAM COORDINATORS <br /> ilib.l„. i ' :. • Mike Huggins, REHS, RDI <br /> • cPMargaret tagorio, REHS <br /> 4 � Fdaa> Website: www.sjgov. org/ehd RobertMcClellon, REHS <br /> Phone: (209) 468-3420 Jeff Carruesco, REHS, RDI <br /> Fax: (209) 464-0138 Kasey Foley, REHS <br /> April 28, 2009 <br /> Mr. R. Ellis, Jr. <br /> Ms. Ethyl D. Ellis, Trustee et alia <br /> 1991 West Lincoln Road <br /> Stockton, California 95207-2462 <br /> Subject: California Tank Lines, Inc. <br /> 3105 South EI Dorado Street <br /> Stockton, California 95206 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Site <br /> Investigation Work Plan, dated February 26, 2009, prepared and submitted by Western Resource <br /> Management (WRM) on your behalf for the above-referenced site. In the work plan, WRM <br /> proposes to collect eight soil gas samples both on- and off-site at approximately five feet below <br /> surface grade (bsg) at locations illustrated in Figure 3 of the work plan. <br /> The EHD conditionally approves the work plan with the following recommendations : <br /> • Omit soil borings SV- 1 , SV-4, and SV-8 due to their distances from the source area(s) ; <br /> • Move the location for boring SV-2 between monitoring well MW-2 and Shop No . 3 , but <br /> outside the former underground storage tank (UST) excavation; <br /> • Move the location for boring SV-3 closer to Shop No. 4; <br /> • Move the location for boring SV-5 to the west side of the main office building; <br /> • Move the location for boring SV-7 to between the shop building and the former diesel <br /> USTs (northeast of monitoring well MW- 1 ); <br /> • At least one foot of dry granular bentonite instead of dry bentonite pellets should be <br /> emplaced on top of the sand pack followed by emplacing hydrated bentonite grout to the <br /> surface when constructing the soil vapor points ; <br /> • Include the analysis for motor oil when collecting a soil gas sample near monitoring well <br /> MW-2; <br /> • Collect soil gas samples in Summa canisters for analysis by method TO- 15 , and in <br /> TENAX sorbent tubes for analysis by method TO- 17 ; <br /> i <br /> i <br /> Please rename the five remaining soil borings and resubmit Figure 3 with the revised locations <br />