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46� EAST BAY ; e`4 .sci r }{��� HEALTh <br /> MUN/C/PAL UTIL/TY DIS TR/CT- nr (,,.p Q_ GARY L.HUNT <br /> !- f P*1;P- ,1 R SF CE,_ ASSISTANT GENERAL MANAGER <br /> OPERATIONS,PLANNING,AND MAINTENANCE <br /> March 6, 1996 <br /> Mh, 9 fir, 10: 19 <br /> Ms. Patricia Leary <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827 <br /> Dear Ms. Leary: <br /> Re: General Order No. 91-25015,EBMUD, Stockton Service Center, 1804 W.Main St., <br /> Stockton, San Joaquin County <br /> i <br /> -rTl�ais- s;a f rr�al-req�zest <br /> *ca-.;,rrm nat-�:th,--!Warte-Discharge--Per-:::at-fer-t-he above-re-fcrenced site. _ <br /> This permit was issued in May 1995, for a proposed in situ bioremediation system to treat <br /> hydrocarbon contaminated groundwater. The remediation activities were not performed,we do <br /> not plan to perform them, and we request that the permit be terminated. <br /> Data available from 14 quarters of groundwater monitoring indicate that there has been very little <br /> plume migration, values of the contaminants are stable or decreasing, and there is bacteriological <br /> degradation of the contaminants. We discussed the need to conduct any active remediation at the <br /> site with Diane Hinson of San Joaquin County in June 1995, and we concurred that there wasn't <br /> a need based on the data that has been gathered. We have worked closely with the Local <br /> Oversight Program staff of San Joaquin County, and have submitted an addendum to the i <br /> Remedial Action Plan to them that outlines the basis for our decision to continue with passive <br /> bioremediation. <br /> We will continue to conduct groundwater monitoring semiannually in 1996 to confirm that the <br /> plume in not migrating and that natural attenuation continues to occur. <br /> If you have any questions, feel free to call me at 510/287-1627. <br /> C THIA C. ADKISSON <br /> Environmental Compliance Specialist <br /> CCA:cca <br /> a " <br /> cc: Diane Hinson, San Joaquin County <br /> Beth Thayer, Central Valley RWQCB <br /> 375 ELEVENTH STREET. OAKLAND CA 94607-4240 (510) 2B7-0444 " <br /> P.O.BOX 24055 . OAKLAND . CA 94623-1055 - - - - <br /> BOARD OF DIRECTORS JOHN A.COLEMAN . KATY FOULKES . JOHN M.GIOIA - <br /> FRANK MELLON. NANCY J.NADEL. MARY SELKIRK . KENNETH H.SIMMONS <br />