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- Pacific Gas and Electric Company -2- 17 March 2010 <br /> McDonald Island Compressor Facility <br /> San Joaquin County <br /> 3. ESLs may be used as a screening tool for petroleum hydrocarbons in soil. USEPA <br /> Region 9, Preliminary Remediation Goals, 2008, should be used for naphthalene and <br /> BTEX in soil samples, if the values are more conservative than the ESI-s. Water Quality <br /> Objectives (WQO) must be used as the screening tool for grab groundwater samples. <br /> 4. Please provide a schedule for the submittal of the Report of Findings. To expedite your <br /> work at the Site, your confirmation of my comments and a proposed schedule may be <br /> submitted informally in email to me. <br /> Please provide me with 5 working days notice prior to the start of field activities, in case I wish <br /> to be present. <br /> If you have any questions, please contact me at (916) 464-4607 or email at <br /> kamarup,waterboards.ca.gov. <br /> KATHLEEN AMARU, P.G., C.E.G. <br /> Engineering Geologist <br /> cc: Ms. Kathleen Abbott, Arcadis, 2033 North Main St, Suite 340, Walnut Creek, CA 94596 <br /> Mr. Harlan Knoll, San Joaquin County Department of Environmental Health <br />