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ATC Associates Inc. <br /> NkTc 1117 Lone eAvenue, Suite 201 <br /> Modesto, California 95351 <br /> 209-579-2221 <br /> ASSOCIATES INC . <br /> Fax: 209-579-2225 <br /> August 20, 2012 <br /> 54.62514.0001 <br /> Mr. Harlin Knoll <br /> Mr. Nuel Henderson <br /> San Joaquin County <br /> Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Subject: Groundwater Remediation Implementation at the King Island Resort, <br /> 11530 West Eight Mile Road, Stockton, California. Site Code: 1557 <br /> Dear Messrs. Knoll and Henderson: <br /> In regard to our recent conversations concerning implementation of ozone injection remediation and <br /> periodic groundwater monitoring at the site, ATC Associates Inc. (ATC) proposes the following <br /> groundwater monitoring and sampling schedule with respect to petroleum hydrocarbon constituents. <br /> ATC anticipates the Regional Water Quality Control Board may have certain monitoring and sampling <br /> requirements with regard to potential formation of undesirable byproducts resulting from the ozone <br /> injection process : <br /> • Monitoring wells MW1 , MW2, MW3, and MW9 through MW13 are to be sampled and <br /> analyzed for total petroleum hydrocarbons quantified as gasoline (TPHg), methyl tertiary butyl <br /> ether (MTBE), and tertiary butyl alcohol (TBA) annually with the next sampling event to be <br /> conducted in 2012, probably late in the third quarter. <br /> • Monitoring well M W 14 will be sampled and analyzed for MTBE and TBA semi-annually with <br /> the next sampling event to be conducted in 2012, probably late in the third quarter, and <br /> biennially for TPHg with the next sampling event to be conducted in 2012, probably late in the <br /> third quarter. <br /> • Monitoring wells MW4R, MW5, MW6, and MW7, and the domestic wells at the resort and <br /> trailer park will be sampled and analyzed for TPHg, MTBE, and TBA semi-annually with the <br /> next sampling event to be conducted in 2012, probably late in the third quarter. <br /> Please issue a letter addressing the proposed monitoring schedule, and any other concerns you may <br /> deem appropriate with respect to the pending implementation of groundwater remediation at the site <br /> via ozone injection. ATC anticipates injection ozone sequentially into groundwater via the three <br /> injection wells (IW 1 , IW2, and IW3) installed on the levee. <br /> 1 ATC Associates Inc. <br />