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MONITORING AND REPORTING PROGRAM 4 J. R. SIMPLOT COMPANY LATHROP, SAN JOAQUIN COUNTY 4. LCRS Monitoring All LCRSs shall be tested annually to demonstrate operation in conformance with waste discharge requirements. The results of these tests shall be reported to the Board and shall include comparison with earlier tests made under comparable conditions. 5. Ground Water Monitoring The following Evaluation Monitoring Program shall be implemented at the facility. Samples from the ground water monitoring wells shall be analyzed for the parameters and constituents at the indicated frequencies as shown in Table II and reported to the Board quarterly. Ground water sampling shall include an accurate determination of the ground water surface elevation and field parameters (see Table II) for each Monitoring Point of Background Monitoring Point. Ground water elevations taken prior to purging the well and sampling for Monitoring Parameters shall be used to fulfill the ground water gradient/direction analyses required. For each monitored ground water body, the Discharger shall measure the water level in each well and determine ground water gradient and direction at least quarterly, including the times of expected highest and lowest elevations of the water level for the respective ground water body. Ground water elevations fro all background and downgradient wells for a given ground water body shall be measured within a period of time short enough to avoid temporal variations in ground water flow which could preclude accurate determination of ground water gradient and direction. This information shall be included in the quarterly monitoring reports. The ground water monitoring well network shall consist of wells LP-1, LP-2, LP-3, and PW-1 as shown on Attachment B. The ground water elevation in all wells shall be used in conjunction with available hydrogeologic data to determine the velocity and direction(s) of ground water flow. The Discharger shall annually submit ground water contour maps and/or ground water flow nets prepared from maximum wet weather and minimum dry weather water level measurements and hydrogeologic information pertaining to this site. All springs, seeps, and creeks within 1,000 feet from the site shall be identified and used in preparing the ground water contour maps and/or flow nets. All parameters shall be graphed so as to show historical trends at each well. 6. Class II Surface Impoundment Monitoring The Class II Surface Impoundments shall be sampled and analyzed as specified in Table III. Class II surface impoundment monitoring reports may be submitted with the corresponding quarterly ground water monitoring reports. 7. Stormwater Surface Impoundment Monitoring The Stormwater Surface Impoundment shall be sampled and analyzed as specified in Table IV and within 24 hours of the first two storms of the wet season that produce significant flows. Stormwater Surface Impoundment monitoring reports may be submitted with the corresponding quarterly ground water monitoring reports. 8. Synthetic Liner Monitoring All visible portions of synthetic liners shall be inspected on a weekly basis and their condition reported quarterly to the Board.