CORRESPONDENCE_1984-1989 - Laserfiche WebLink

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L WASTE DISCHARGE REQUIREMENTS F6RWAR0 INCORPORATED WASTE MANAGEMENT FACILITY CLASS II LANDFILLS CLASS III LANDFILLS CLASS II SURFACE IMPOUNDMENT CLASS II LAND TREATMENT UNIT SAN JOAQUIN COUNTY` -11- 4 17. Precipitation and drainage control systems shall be designed and constructed to accommodate the anticipated volume of precipitation and peak flows from surface runoff as follows: Classification Storm Size Class II k7AUs 1,000 -year, 24-hour Class III WMUs 100 -year, 24-hour 18. Surface drainage from tributary areas and internal site drainage from surface or subsurface sources shall not contact or percolate through wastes. 19. Annually, prior to the anticipated rainy season, any necessary erosion control measures shall be implemented, and any necessary construction, maintenance, or repairs of precipitation and drainage control facilities shall be completed to prevent erosion or flooding of the site and to prevent surface drainage from contacting or percolating through wastes. 20. Water used for site maintenance shall be limited to the minimum amount necessary for dust control. DFILL SPECIFICATIONS 21. During the rainy season, when precipitation can be expected, a minimum one -foot thickness of low permeability cover shall be maintained over all but the active disposal area of the landfill units. The active disposal area shall be confined to the smallest area practicable fused an the anticipated quantity of waste discharge and other disposal site operations. This cover may not be required at WMU "E" if the character of the ash is such that infiltration by rainwater is not a problem. 22. The migration of methane gas from the landfill units shall be controlled as necessary to prevent nuisance conditions or the impairment of beneficial uses of water. 23. Dewatered sewage or water treatment sludge may be accepted for disposal if the sludge contains at least 20 percent solids (primary sludge) or 15 percent solids (secondary sludge), is mixed with refuse at a. minimum solids -to -liquid ratio of a:l by weight and sha11 not exceed the ultimate moisture bolding capacity of the 'nonhazardous solid waste', and is not a 'designated waste'. Wastes discharged at transfer stations must also meat these specifications.