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WASTE DISCHARGE REQUI MENTS <br /> FORWARD INCORPORATED <br /> WASTE MANAGEMENT FACILITY <br /> CLASS II LANDFILLS <br /> CLASS IIF LANDFILLS <br /> CLASS II SURFACE IMPOUNDMENT <br /> CLASS II LAND TREATMENT UNIT <br /> SAN JOAQUIN COUNTY <br /> 17. precipitation and drainage control systems shall be designed and <br /> constructed to accoimodate the anticipates volume of precipitation <br /> and peak flows from surface runoff as follows: <br /> Classification Storm Size <br /> Class II WMUs 1,000-year, 24-hour <br /> Class III WMUs 100-year, 24-hour <br /> 18. Surface drainage from tributary areas and internal site drainage from <br /> surface or subsurface sources shall not contact or percolate through <br /> wastes. <br /> 19. Annually, prior to the anticipated rainy season, any necessary erosion <br /> control measures shall be implemented, and any necessary construction, <br /> maintenance, or repairs of precipitation and drainage control <br /> facilities shall be completed to prevent erosion or flooding of the <br /> site and to prevent surface drainage from contacting or percolating <br /> through wastes. <br /> 20. Water used for site maintenance shall be limited to the minimum amount <br /> necessary for dust control. <br /> LANDFILL SPECIFICATIONS <br /> 21. During the rainy season, when precipitation can be expected, a minimum <br /> one-foot thickness of low permeability cover shall be maintained over <br /> all but the active disposal area of the landfill units. The active <br /> disposal area shall be confined to the smallest area practicable based <br /> on the anticipated quantity of waste discharge and other disposal site <br /> operations. This cover may not be required at WMU "E" if the <br /> character of the ash is such that infiltration by rainwater is not a <br /> problem. <br /> 22. The migration of methane gas from the landfill units shall be <br /> controlled as necessary to prevent nuisance conditions or the <br /> impairment of beneficial uses of water. <br /> 23: Dewatered sewage or water treatment sludge may be accepted for <br /> disposal if the sludge contains at least 20 percent solids (primary <br /> sludge) or 15 percent solids (secondary sludge), is mixed with refuse <br /> at a minimum solids-to-liquid ratio of 5:1 by weight and shall not <br /> exceed the ultimate moisture holding capacity of the 'nonhazardous <br /> solid waste' , and is not a 'designated waste' . Wastes discharged at <br /> transfer stations must also meet these specifications. <br />