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STATE OF CALIFORNIA –� GEORGE DEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATER DUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGIONfi11 -.141� � , <br /> X443 ROUTIER ROADD ". 7LA <br /> SACRAMENTO CA 95827-3098 <br /> 14 July 1987 1. <br /> ,; 15 1987 <br /> Mr. James HarveyNTAL HEALTH <br /> Safety and Pollution Control Officer ENVIRU"nE' SERVICES <br /> Dallas Corporation FERMII/ <br /> 6750 LBJ Freeway <br /> Dallas, TX 75380-9046 <br /> DALLAS CORP. , DBA OVERHEAD/LODI DOpI; COMP�(O/LDC) HYDROOGEEO'LOGICAL ASSESSMENT <br /> REPORT (HAR) /;Z2 <br /> (J >;i Uc'1L�. Kss/7 GUT <br /> Enclosed is a memorandum summarizing our meeting of 8 July 1987, at which we <br /> discussed the proposed work for completion of the HAR for the 0/LDC surface <br /> impoundment (SI) . Progress toward an acceptable HAR has been made, but several <br /> major areas of disagreement still exist. <br /> As discussed in the meeting, the accuracy of water surface elevation <br /> measurements has not been adequately demonstrated. Several different sets of <br /> wellhead elevations have been reported over the course of monitoring. Since <br /> the possibility exists that the water table gradient has shifted as much as <br /> 900, and accurate knowledge of the gradient direction is critical to <br /> determining the adequacy of the monitoring network, please submit a report of <br /> ground water elevation measurements for the period December 1985 to present. <br /> This report shall include the following: <br /> 1) All data from site surveys to date, along with a narrative <br /> description of sources of error in each survey. <br /> 2) Reference point elevations for monitoring wells MW-1 through MW-3, <br /> and justification for any reference point elevation changes over <br /> the period of monitoring. <br /> 3) Depth to water measurement for each well for each monitoring date, <br /> along with a narrative description of measurement technique and <br /> equipment. <br /> 4) Static water surface elevation for each well for each monitoring <br /> date. <br /> 5) An accurate site map depicting the direction of water table slope <br /> for each monitoring date. <br /> Please submit this report, pursuant to Water Code Section 13267, by 23 July <br /> 1987. If you have any questions please contact John Woodling at (916) 361- <br /> 5729. <br /> GREG K. VAUGHN <br /> Senior Engineer <br /> JKW:jkw <br /> Enclosure <br /> cc: Mr. Alan Friedman, Department of Health Services, Sacramento <br /> Mr. C. Leland Hall, San Joaquin County Local Health District, Stockton <br /> Mr. Kent Zenobia, J.H. Kleinfelder, Sacramento <br />