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WASTE DISCHARGE REQUIREMENTS ORDER R5-2015-0058-01 -43- <br />SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS <br />FOOTHILL SANITARY LANDFILL, INC. <br />FOOTHILL LANDFILL <br />SAN JOAQUIN COUNTY <br /> <br />Provision H.8 and H.9. <br />3. The Discharger shall develop and implement an approved O&M Plan for the <br />Class II surface impoundment(s) at the site, as required under Title 27 <br />section 21760, subdivision (b). At a minimum, the plan shall address: <br />a. expected flows and liquids balance calculations; <br />b. expected waste types and commingling; <br />c. contingency plans in the event of facility breakdown or failure of the <br />primary and secondary liner; <br />d. response plans in the event of facility breakdown or failure of the primary <br />and secondary liner; <br />e. seasonality issues; <br />f. inspection and maintenance programs; <br />g. LCRS to be tested at least annually (see SPRRs, § E.14); <br />h. contingency plan for the disposal of excess leachate without stopping of <br />the corrective action systems; <br />i. forecasted precipitation event monitoring when SI water levels are near <br />the freeboard elevation limit of two feet; <br />j. calculations as to the aggregate amount of leachate expected to be <br />generated in and pumped from the LCRSs back into the impoundment <br />under normal operations in the absence of a liner failure; and <br />k. other information relevant to impoundment operations and maintenance <br />that could potentially affect water quality. <br />4. Sediment or solids that accumulate in the Class II surface impoundment <br />shall be periodically removed to maintain minimum required freeboard and <br />designed storage capacity. Sludge and solids removal shall be <br />accomplished in a manner that ensures the continued integrity of the liner <br />and leachate collection system in accordance with the Facility’s operations <br />plan. Prior to disposal of these sediment and solids, the Discharger must: <br />a. Notify the Central Valley Water Board staff at least 30 days prior to <br />removal of sediment and solids from the Class II surface impoundment; <br />b. Take sufficient samples of the sediment and solids for their <br />characterization and classification pursuant to Title 27 sections 20200- <br />20230; <br />c. Provide to Central Valley Water Board staff a rationale for the sampling <br />protocol used, the results of this sampling, and a rationale for