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WASTE DISCHARGE REQL,-&ENIENTS ORDER NO. 5-00-226 -6- COUNTY OF SAN JOAQUIN DEPT. OF PUBLIC WORKS COUNTY SERVICE AREA NO.44 CASTELLO ESTATES AKA APRICOT ACRES SAN JOAQUIN COUNTY C. Effluent Limitations 1. The discharge of effluent in excess of the following limits is prohibited: Constituent Units 30-Dav Average Daily Maximum BODS mg/l 40 80 Total Settleable Solids ml/1-hr -- 0.2 Nitrate as Nitrogen mg/l 5 10 Total Dissolved Solids mg/l 1,0001 1,250 Total Coliform NTN/100 ml ' 23 2403 1 Value selected based on average groundwater concentration presented in RWD. Z MPN/100 ml denotes Most Probable Number per 100 milliliter sample. 3 No two consecutive samples shall exceed 240 MPN/100 ml. D. Solids Disposal Requirements: 1., Collected-screenings, sludge, and other solids removed from liquid wastes shall be disposed of in a manner approved by the Executive Officer, and consistent with Consolidated Regulationsfor Treatment, Storage, Processing, or Disposal of Solid Waste, as set forth in Title 27, CCR, Division 2, Subdivision 1, Section 20005, et seq. 2. The Discharger shall submit disposal plans and sludge monitoring results to the Board at least 90 days before any anticipated removal of sludge. The Discharger may not discharge any sludge until the disposal plan is approved by the Executive Officer. 3. Use and disposal of sewage sludge shall comply with existing Federal, State, and local laws and regulations, including permitting requirements and technical standards included in 40 CFR 503. 4. If the State Water Resources Control Board and the Regional Water Resources Control Board are given the authority to implement regulations contained in 40 CFR 503, this Order may be reopened to incorporate appropriate time schedules and technical standards.. The Discharger shall comply with the standards and time schedules contained in 40 CFR 503 whether or not they have been incorporated into this Order. 5. The Discharger is encouraged to comply with the State Guidance Manual issued by the Department of Health Services titled Manual of Good Practice for Landspreading of Sewage Sludge. E. Groundwater Limitations: The discharge shall not cause underlying groundwater to contain waste constituents in concentration statistically greater than background water quality, except for coliform bacteria. For coliform bacteria, increases shall not cause the most probable number of total coliform organisms to exceed 2.2 MPN/100 ml over any 7-day period.