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WASTE DISCHARGE REQUIREMENTS -7- <br /> SAN JOAQUIN COUNTY <br /> NORTH COUNTY SANITARY LANDFILL <br /> CLASS III LANDFILL <br /> SAN JOAQUIN COUNTY <br /> Water Quality Protection Standards <br /> 10. The concentrations of indicator parameters or waste constituents in <br /> waters passing through the Points of Compliance shall not exceed the <br /> "water quality protection standards" established pursuant to Monitoring <br /> and Reporting Program No. 90-021, which is attached to and made part of <br /> this Order. <br /> Protection from Storm Events <br /> 11. Waste management units shall be designed, constructed, and operated to <br /> prevent inundation or washout due to floods with a 100-year return <br /> period. Class III landfills and related containment structures shall be <br /> constructed and maintained to prevent, to the greatest extent possible, <br /> ponding, infiltration, inundation, erosion, slope failure, washout, and <br /> overtopping under 100-year, 24-hour precipitation conditions. <br /> 12. Precipitation and drainage control systems shall be designed and <br /> constructed to accommodate the anticipated volume of precipitation and <br /> peak flows from surface runoff under 100-year, 24-hour precipitation <br /> conditions. <br /> 13. Surface drainage from tributary areas and internal site drainage from <br /> surface or subsurface sources shall not contact or percolate through <br /> wastes. <br /> 14. 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 facilities <br /> shall be completed to prevent erosion or flooding of the facility and to <br /> prevent surface drainage from contacting or percolating through wastes. <br /> The Discharger shall submit an annual report to the Regional Board by 15 <br /> November of each year describing measures taken to comply with this <br /> specification. <br /> LANDFILL SPECIFICATIONS <br /> 15. During the rainy season a minimum one-foot thickness of low permeability <br /> cover shall be maintained over all but the active disposal area of the <br /> landfill . The active disposal area shall be confined to the smallest <br /> area practicable based on the anticipated quantity of waste discharge <br /> and other waste management facility operations. <br /> 16. Methane and other landfill gases shall be adequately vented, removed <br /> from the landfill , or otherwise controlled to prevent the danger of <br /> explosion, adverse health effects, nuisance conditions, or the <br />