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r L1 LEVINEE * FRICKISE <br /> June 28, 1996 LF 3966.05-001 <br /> Ms. Wendy Cohen <br /> State of California <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827 <br /> Subject: Conceptual Outline for Implementation of Interim Remedial Actions, Lincoln Center <br /> Project, Stockton, California <br /> Dear Wendy: <br /> During our May 6, 1996 meeting with the Regional Water Quality Control Board (Regional <br /> Board), you had expressed concerns about the lack of interim remedial actions (IRAs) at Lincoln <br /> Center. Recall that at that meeting, we had expressed similar concerns about the need to implement <br /> IRAs, and committed to provide the Regional Board with a schedule and plan for consideration of <br /> IRAs in conjunction with submittal of the next bimonthly letter report. The purpose of this letter is <br /> to conceptually outline IRAs that may need to be implemented at Lincoln Center. <br /> The consideration of IRAs at this time is appropriate as it will be some time before the final <br /> Remedial Action Plan (RAP) is approved by the agencies, court, and public, and the final remedial <br /> action is implemented. As discussed below, Levine-Fricke does not believe there are sufficient data <br /> at this time to propose the exact scope of IRAs. Notwithstanding, based upon available data and on <br /> our conceptual understanding of the Site, Levine-Fricke believes there are certain IRAs that could <br /> and should be implemented soon. The Remedial Investigation (RI) that we have proposed in the <br /> Work Plan for Environmental Investigation, which was submitted to you in draft form on May 31, <br /> 1996, will allow us to evaluate the appropriateness of these and other possible IRAs. <br /> SOIL INTERIM REMEDIAL ACTIONS <br /> Based upon our evaluation of existing soil and soil-vapor analytical data, Levine-Fricke does not <br /> believe there is sufficient data at this time to recommend a soil IRA. The necessity for soil IRAs <br /> will be evaluated further during implementation of the upcoming source investigation portion of the <br /> RI, which is currently planned to begin in Fall 1996. <br /> A soil IRA will be proposed if the source investigation indicates significant concentrations of <br /> detected Hazardous Substances in soil and/or soil-vapor that require immediate remediation, such <br /> 1900 POWELL STREET, 12TH FLOOR, EMERYVILLE, CALIFORNIA 94608-1811 phone (510) 652-4500 fax (510) 652-2246 <br /> San Francisco Bay Area Sacramento Irvine San Diego Phoenix Salt Lake City- Denver Chicago Tallahassee Newark Honolulu <br />