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1 <br /> ! • <br /> MONITORING AND REPORTING PROGRAM -4- <br /> J. R SIlvTLOT COMPANY <br /> LATHROP, SAN JOAQUIN COUNTY <br /> ti. <br /> Report in Sampling <br /> Parameter/Constituent Units of Frequency <br /> Chemical Oxygen Demand mg/l Annually <br /> EPA Methods 8010 & 8020 constituents' µg/1 Annually <br /> 11 nerals' mg/l Annually <br /> Metals' mg/l Annually <br /> ' Daily during the period 1 December through 30 April and weekly thereafter <br /> Z Field measurements <br /> 3 Report all peaks <br /> a Those minerals listed under Class II Surface Impoundment monitoring <br /> 5 Those metals listed under Class II Surface Impoundment monitoring <br /> 4. LCRS Monitoring <br /> AlI LCR-Ss shall be tested annually to demonstrate operation in conformance with waste discharge <br /> requirements. The results of these tests shall be reported to the Board and shall include.comparison <br /> with earlier tests made under comparable conditions. <br /> 5. Ground Water Monitoring <br /> The following Evaluation Monitoring Program shall'be implemented at the facility. Samples from <br /> the ground water.monitoring wells shall be analyzed for the parameters and constituents at the <br /> indicated frequencies as shown.in the table.below and reported to the Board quarterly. <br /> Ground water sampling shall include an accurate determination of the ground water surface <br /> elevation and field parameters (see table below) for each Monitoring Point of Background <br /> Monitoring Point. Ground water elevations taken prior to purging the well and sampling for <br /> Monitoring Parameters shall be used to fizlfill the ground water gradient/direction analyses required. <br /> For each monitored ground water body, the Discharger shall measure the water.level in each well <br /> and determine ground water gradient and direction at least quarterly, including'the times of expected <br /> highest and lowest elevations of the water level for the respective ground water body. Ground <br /> water elevations for all background and dow.ngradient wells for a given ground water body shall be <br /> measured within, a period of time short enough to avoid temporal variations in ground water flow <br /> which could preclude accurate determination of ground water gradient and direction. This <br /> information shall be included in the quarterly monitoring reports. The mound water monitoring well <br /> network shall consist of wells LP-1, LP-2, LP-3, and PW-I as shown on Attachment B. <br /> The ground water elevation in all wells shall-56 used in conjunction with available hydrogeologic <br /> data to determine the velocity and direction(s) of ground water flow. The Discharger shall annually <br /> submit ground water contour maps and/or ground water flow nets prepared from maximum wet <br />