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WASTE DISCHARGE REQ, - .IN ENTS ORDERNO.5-01-145 _ <br /> KNIFE RIVER CORPORATION DBA KRC AGGREGATES -b <br /> AGGREGATE MINE AND WASTEWATER SYSTEM <br /> SAN JOAQUIN COUNTY <br /> 12. The freeboard in all ponds shall never be less than two feet as measured vertically from <br /> the water surface to the lowest paint"of overflow. <br /> 13. The.wastewater ponds shall have sufficient:capacit'to accommodate allowable <br /> wastewater flow,.design"seasonal precipitation, and ancillary inflow and infiltration. <br /> Design seasonal precipitation shall'be based"on total annual precipitation using a return <br /> period of I00 .years, distributed monthly.in accordance withthe historical rainfall <br /> patterns. <br /> 14. On or about 1 November of each year, available ponds storage capacity shall at least <br /> " equal the volume necessary to comply with Discharge Specifications B.12 and B.13. <br /> G <br /> 15. The Discharger shall comply with all applicable sections of the Aboveground Petroleum <br /> Storage Tank Regulations (Section 25270, Health and Safety Code). <br /> 16. Only domestic wastewater shall be discharged to the domestic wastewater treatment <br /> system (septic system). <br /> 17. Septage generated in the septic tank shall be discharged to a permitted municipal <br /> wastewater treatment or equivalent facility. All transportation of septage or other <br /> wastewater shall be performed by a duly authorized service. <br /> f IS. Storm water discharges at the site shall comply with the regulations contained in the State " <br /> Water Resources Control Board (SWRCB) Water Quality Order No. 97-03-DWQ <br /> 4 National Pollutant Discharge Elimination System(NPDES), General Permit No. CAS <br /> 000001, Waste Discharge Requirements (WDRs) for Discharges to Storm Water <br /> Associated with Industrial Activities (excluding construction activities). <br /> C. Solids Disposal Requirements: <br /> 1. Collected screenings, sludge, and <br /> other solids removed from liquid wastes shall be <br /> disposed of in a manner approved by the Executive Officer, and consistent with <br /> Consolidated Regulations for Treatment, Storage, Processing, or Disposal of Solid <br /> Waste, as set forth in Title 27, CCR, Division 2, Subdivision 1, Section 20005, et seq. <br /> 2. Any proposed change in sludge use or disposal practice from a previously approved <br /> practice shall be reported to the Executive Officer in the next monthly monitoring report. <br /> 3. Disposal of septage shall comply with existing Federal, State, and local laws and <br /> regulations, including permitting requirements and technical standards included in 40 <br /> CFR 503. <br /> 4. If the State Water Resources Control Board and the Regional Water Resources Control <br /> Board are given the authority to implement regulations contained in 40 CFR 503, this <br /> Order may be reopened to incorporate appropriate time schedules and technical <br /> 1 <br />