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BLACK & VEATCH <br /> SPECIAL PROJECTS CORP. <br /> I <br /> 2300 Clayton Road, Suite 1280,Concord,California 94520-2100, (510) 246-8010, Fax: (510) 246-8082 <br /> I� <br /> East Bay Municipal Utility District BVSPC Project 40429.601 <br /> Stockton Service Center BVSPC File E.1 <br /> February 26, 1996 <br /> .Diane Hinson <br /> San Joaquin County <br /> Public 'Health Services <br /> Environmental Health Division <br /> P.0 Box 2009 <br /> Stockton, California 95201 <br /> Subject: Addendum No. 2 to the , <br /> Additional Assessment and <br /> Remedial Options Report <br /> I <br /> Dear Ms. Hinson: <br /> In June 1995, the East Bay Municipal Utility District (District) and Black <br /> & Veatch Special Projects Corp. met with you to discuss the status of the <br /> District's Stockton Service Center site. During this meeting, it was <br /> agreed that the site had been adequately characterized, and the following <br /> conclusions were made: <br /> • The petroleum hydrocarbon plume has stabilized and is not migrating. <br /> • Benzene and total petroleum hydrocarbons (TPH) concentrations in <br /> MW-9, a. monitoring well at +the leading edge of the plume, fluctuated <br /> from less than the detection limit to low concentrations for several <br /> quarters. <br /> • Natural bacteria are present at the site. <br /> • The aquifer is not highly permeable. <br /> Based on this information, the District, with your concurrence, decided to <br /> revisit the passive bioremediation alternative presented i.n the feasibility <br /> study (Additional Site Assessment and Remedial Options Report, B&V Waste <br /> Science and Technology Corp. , December 1993) . The following text presents <br /> a modification to the Remedial Action Plan (Addendum No. I to the <br /> Additional Site Assessment and Remedial Options Report, Black & Veatch <br /> Waste Science, Inc. , September 1994) proposing the use of passive <br /> bioremediation in place of active bioremediation. <br /> Background <br /> The District owns and operates the Stockton Service Center at 1804 West <br /> Main Street, Stockton, California. The Stockton Service Center is used as <br /> an operations and maintenance facility.. Between 1987 and 1989, three <br /> I <br /> i <br />