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y <br /> STA?E OF CALIFORNIA GEORGE DEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION _m <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> 9 January 1990 <br /> JAN 1 0 12"3 <br /> HE <br /> Mr. Carlo Marianne Lf��ui Irlt- ,LT'r i <br /> Stockton Scavenger Association LF, <br /> pVsT/SLRViCLS <br /> 1240 Navy Drive <br /> Stockton, CA 95206 <br /> STOCKTON SCAVENGER ASSOCIATION 1240 NAVY DRIVE, STOCKTON - SOIL BIOREMEDIATION <br /> PROJECT <br /> We have reviewed the 24 November 1989 bioremediation proposal prepared by <br /> Uriah Inc. , for treatment of hydrocarbon contaminated soils at this site. The <br /> proposal describes the conceptual design for a passive soil bioremediation <br /> system. Compost is added to the soil as a bulking agent and to provide a <br /> nutrient source for the hydrocarbon utilizing bacteria. The soil is then <br /> placed in windrows to allow adequate aeration of the treatment units. Interim <br /> sampling will be conducted on a bi-weekly basis to monitor the effectiveness <br /> of the proposed remediation system. <br /> We agree with the concept of bioremediation for treating the hydrocarbon <br /> contaminated soil at this site. The proposed remediation system appears <br /> capable of reducing the concentration of hydrocarbons to acceptable levels. <br /> However, adequate monitoring and documentation will be necessary to evaluate <br /> the performance of the system. By 31 January 1990, please submit a detailed <br /> monitoring schedule and sampling plan for our approval . <br /> Beginning 15 February 1990 and by the 15th day of each month thereafter, <br /> please provide monthly monitoring reports on the operation of the <br /> bioremediation system. The monitoring reports should include documentation of <br /> bacteria populations, temperature, moisture content, oxygen content, <br /> degradation rates and any adjustments made to the system during the preceding <br /> month of operation. All reports should be submitted to this office. and the <br /> office of the San Joaquin County Department of Public Health Services. After <br /> reviewing the monthly monitoring reports, we will evaluate the performance of <br /> the bioremediation system to determine whether the system is adequately <br /> reducing the levels of hydrocarbons. <br /> If you have any questions, please call me at (916) 361-5731. <br /> r Q <br /> THOMAS D. PELTIER <br /> Engineering Geologist <br /> TDP/tdp <br /> cc:/Ms. Laurie Cotulla, San Joaquin County Department of Public Health <br /> Services, Stockton <br /> Mr. Michael Caprio, Norcal Solid Waste Systems, Inc. , San Francisco <br />