Laserfiche WebLink
MEMORANDUM <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION <br /> 3443 Routier Road Phone: (916) 361-5600 <br /> Sacramento, CA 95827-3098 ATSS: 8-495-5600 <br /> TO: Greg K. Vaughn FROM: John K. Woodling <br /> Sr. Engineer, TPCA Unit Eng. Geologist, TPCA Unit <br /> AWL, — <br /> DATE: 26 May 1987 SIGNATURE: <br /> SUBJECT: Dallas Corp. ,, dba, Overhead/Lodi D� Co. (O/LDC) , Re iew of <br /> Surface Impoundment Closure Plan <br /> After reviewing the closure plan for the O/LDC surface impoundment, <br /> I have found the following areas in which the information contained <br /> therein is insufficient to satisfy the hydrogeological assessment <br /> report (HAR) requirements of TPCA. These comments relate only to <br /> the HAR requirements, and not to the method of closure itself. The <br /> comments supplement earlier comments made in our review of the O/LDC <br /> HAR work plan. <br /> The referenced sections of TPCA and the Outline of Hydrogeologic <br /> Assessment Report contain more specific details of the above <br /> requirements, and should serve as guidelines in the preparation of <br /> the HAR. <br /> Surface Water <br /> The locations and representative water analyses of surface water <br /> bodies and springs, as specified in Section 25208.8 (c and d) of <br /> TPCA, have not been provided. The inclusion of this information was <br /> proposed in the HAR work plan, however. <br /> Wells <br /> TPCA Section 25208.8 (e) requires descriptions and water analyses for <br /> all wells within the facility boundary and within one mile of the <br /> facility perimeter. <br /> Ground Water <br /> Section 25208. 8 (f) of TPCA requires an analysis of the lateral and <br /> vertical extent of all water-bearing strata which might be affected <br /> by leachate from the surface impoundment. The closure plan and <br /> monthly monitoring reports address only the top of the uppermost <br /> water bearing zone. No chemical or hydrogeologic characterization <br /> of deeper water-bearing materials has been performed. Additionally, <br /> no quantitative estimates of aquifer properties and ground water <br /> flow rates were presented. <br />