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WASTE DISCHARGE REQUIREMENTS ORDER NO. 5-00-227 -6- KELLOGG SUPPLY, INC.,DBA CASCADE FOREST PRODUCTS SAN JOAQUIN COUNTY B. Discharge Specifications: 1. Objectionable odors originating at this facility shall not be perceivable beyond the limits of the facility. 2. The dissolved oxygen content in the upper zone (1 foot) of the contact water pond shall not be less than 1.0 mg/l. 3. The contact water pond shall not have a pH of less than 6.5 or greater than 8.5. 4. The ponds shall be managed to prevent the breeding of mosquitoes. hi particular, a. An erosion control program should assure that small coves and irregularities are not created around the perimeter of the waste surface. b. Weeds shall be minimized through control of water depth, harvesting, and/or herbicides. c. Dead algae, vegetation, and debris shall not accumulate on the water surface. 5. The Discharger's contact water pond shall be designed, constructed, operated, and maintained to prevent inundation or washout due to floods with a 100-year return frequency. 6. The freeboard in the contact water pond shall never be less than two feet as measured vertically from the water surface to the lowest point of overflow. 7. The contact water pond shall have sufficient capacity to accommodate allowable wastewater flow, design seasonal precipitation, and ancillary inflow and infiltration. Design seasonal precipitation shall be based on total annual precipitation using a return period of 100 years, distributed monthly in accordance with the historical rainfall patterns. 8. The contact water pond shall be constructed and maintained to minimize percolation of contact water to the unsaturated zone beneath the pond. A vertical hydraulic conductivity of less than 1 x 10-6 cm/sec is considered appropriate for this storage pond. 9. The 2.6 acre storage area shall be bermed and sloped to drain contact water to a drain connected to the contact water holding pond. C. Solids Disposal Requirements: 1. Collected screenings, sludge, and other solids removed from the contact stormwater pond shall be disposed of in a manner approved by the Executive Officer, and consistent with Consolidated Regulations for Treatment, Storage, Processing, or Disposal of Solid Waste, as set forth in Title 27, CCR,Division 2, Subdivision 1, Section 20005, et seq. 2. Any proposed change in sludge use or disposal practice from a previously approved practice shall be reported to the Executive Officer 30 days prior to the disposal activity.