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WASTE DISCHARGE REQUIREMENTS FOR Page 5 <br /> SAN JOAQUIN COUNTY AND THE CITY OF TRACY <br /> CORRAL HOLLOW SANITARY LANDFILL <br /> CLASS III LANDFILL <br /> SAN JOAQUIN COUNTY <br /> Protection from Storm Events <br /> 4. Waste management units shall be designed, constructed, and operated to <br /> prevent inundation or washout due to floods with a 100-year return period. <br /> 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 /> 5. 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 /> 6. Surface drainage from tributary areas and internal site drainage from <br /> surface or subsurface sources shall not contact or percolate through <br /> wastes. <br /> 7. 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 describing measures taken to comply with this specification. <br /> LANDFILL SPECIFICATIONS <br /> 8. During the rainy season a minimum one-foot thickness of low permeability <br /> cover shall be maintained over all but the active <br /> confinedisposal <br /> thearea <br /> smallest <br /> landfill . The act ive disposal area shall be <br /> area practicable based on the anticipated quantity of waste discharge and <br /> other waste management facility operations. <br /> 9. Methane and other landfill gases shall be adequately vented, removed from <br /> the landfill , or otherwise controlled to prevent the danger of explosion, <br /> adverse health effects , nuisance conditions, or the impairment of <br /> beneficial uses of water due to migration through the vadose (unsaturated) <br /> zone. <br /> LANDFILL CLOSURE SPECIFICATIONS <br />