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V <br /> EAST BAY MUNICIPAL UTILITY DISTRICT t } y3" GARY L.HUNT <br /> 5 —£ Ftp <br /> E ASSISTANT GENERAL MANAGER <br /> y <br /> `' OPERATIONS,PLANNING,AND MAINTENANCE <br /> March 6, 1996 �, <br /> Ist �0: o' <br /> G» <br /> Ms. Diane Hinson,REHS. <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 95201 <br /> Dear Ms. Hinson: <br /> Re: EBMUD Stockton Center, 1804 West Main Street, Site Code 1169 <br /> Transmittal of Addendum 2 to the Remedial Options Report <br /> I have enclosed a copy of the Addendum 2 (Addendum)to the Additional Assessment and <br /> Remedial Options Report(Report),which was prepared in December 1993. The Report discussed <br /> the descriptions and evaluations of possible remediation alternatives for the site, and did not <br /> include passive bioremediation. The Addendum provides the rationale to perform passive <br /> bioremediation at the site. <br /> We discussed using passive bioremediation ata meeting in June 1995, and agreed that this was an <br /> acceptable alternative. This.decision is based on the following criteria: <br /> • The dissolved hydrocarbon plume has stabilized and is not migrating <br /> • Natural bacteria are present at the site <br /> Source of any contamination has been removed <br /> • The site has been adequately characterized <br /> • . No water.wells, deeper drinking water aquifers, surface water, or other sensitive receptors <br /> are impacted,nor are likely to be <br /> We:will be conducting semi-annual groundwater monitoring at the facility in 1996. We will <br /> -monitor.seven wells for water levels(MW-1, MW-3, MW-4, MW-5, MW-7, MW-8, and MW-9), <br /> and collect,groundwater samples from MW-1;MW-4, MW-5, MW-8;and MW-9. Samples will be <br /> analyzed for TPH as gasoline and BTEX constituents. <br /> If you have any questions or comments, feel free to call me at 510/287-1627. <br /> Sincerely, <br /> THIA C. ADKISSON <br /> Environmental Compliance Specialist <br /> CCA:cca <br /> A S 9CEt%T p4§TREET. OAKLAND. CA 94607.4240. (510) 287-0444 <br /> P.O.BOX 24055. OAKLAND. CA 94623.1055 <br /> BOARD OF DIRECTORS JOHN A.COLEMAN. KATY FOULKES . JOHN M.GIOIA <br /> FRANK MELLON. NANCYJ.NADEL. MARY SELKIRK. KENNETH H.SIMMONS <br /> Recycled Paper <br />