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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0219 -14- <br /> FOR COUNTY OF SAN JOAQUIN <br /> FOR CONSTRUCTION AND OPERATION OF NORTH COUNTY RECYCLING <br /> CENTER AND SANITARY LANDFILL FACILITY, <br /> SAN JOAQUIN COUNTY <br /> 5. Methane and other landfill gases shall be adequately vented,removed from the Unit, or <br /> otherwise controlled as needed to prevent adverse health effects,nuisance conditions, or <br /> the impairment of the beneficial uses of surface water or groundwater due to migration <br /> through the unsaturated zone. <br /> 6. Surface drainage within the waste management facility either shall be contained on-site <br /> or be discharged in accordance with applicable storm water regulations. <br /> 7. The Discharger shall maintain a Storm Water Pollution Prevention Plan and Monitoring <br /> Program and Reporting Requirements in accordance with State Water Resources <br /> Control Board Order No. 97-03-DWQ, or retain all storm water on-site. <br /> 8. Soil cover shall be provided and maintained, in addition to intermediate cover, on <br /> surfaces that have reached final elevations or which are not at final elevations but which <br /> will not receive refuse within two years. Surfaces shall be maintained with the <br /> following soil cover thickness: <br /> Slopes 5:1 and less: a total 3 feet of compacted soil. <br /> Slopes steeper than 5:1: a total 2 feet of compacted soil. <br /> Soil thickness shall be after compaction to 85%relative density. <br /> 9. Interim and partial cover over wastes discharged to a landfill shall be designed and <br /> constructed to minimize percolation of liquids through the wastes. <br /> D. CONSTRUCTION SPECIFICATIONS <br /> 1. The Discharger shall submit for Executive Officer review and approval prior to <br /> construction, design plans and specifications for new Units and expansions of existing <br /> Units, that include the following: <br /> a. A Construction Quality Assurance Plan meeting the requirements of§20324 of <br /> Title 27; and <br /> b. A geotechnical evaluation of the area soils, evaluating their use as the base layer; <br /> and <br /> c. An unsaturated zone monitoring system,which is demonstrated to remain effective <br /> throughout the active life, closure, and postclosure maintenance periods of the Unit, <br /> which shall be installed beneath the composite liner system in accordance with <br /> §20415(d)of Title 27. <br />