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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2009-0049 -13- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS HARNEY LANE LANDFILL SAN JOAQUIN COUNTY 2. The Discharger shall, in a timely manner, remove and relocate any wastes discharged at this facility in violation of this Order. 3. Storm water runoff from the facility shall be monitored in accordance with MRP No. R5-2009-0049 and applicable storm water regulations. 4. A minimum separation of five feet shall be maintained between wastes or leachate and the highest anticipated elevation of underlying groundwater per Title 27 section 20240(c). See also Discharge Specification VI.6, SPRR. 5. The owners of the waste management facility shall have the continuing responsibility to assure protection of usable waters from discharged wastes and from gases and leachate generated by discharged wastes during the closure and postclosure maintenance period of the landfill and during subsequent use of the property for other purposes. C. POST-CLOSURE SPECIFICATIONS 1. All final cover slopes shall be capable of withstanding a maximum probable earthquake. See also SPRR Construction Specification VIII.E. 2. The final cover shall be graded and maintained to prevent ponding, promote lateral runoff, and prevent soil erosion due to high run-off velocities. See also SPRR Storm Water Provision VII.J. 3. Areas with slopes greater than ten percent, surface drainage courses, and areas subject to erosion by wind or water shall be maintained to prevent such erosion. See also Closure and Postclosure Specification IX.G.6. 4. The erosion-resistant layer shall be maintained with native or other vegetation capable of providing effective erosion resistance. 5. Precipitation and drainage control systems shall be designed, constructed, operated and maintained to convey peak flows from a 100-year, 24-hour storm event. (Note: This specification is more stringent than SPRR Storm Water Provision XII.D) 6. The closed landfills shall be maintained to prevent, to the greatest extent possible, ponding, infiltration, inundation, erosion, slope failure, and washout. See also SPRR Storm Water Provision XII.E. 7. Annually, prior to the anticipated rainy season but no later than 31 October, any necessary erosion control measures shall be implemented and any necessary construction, maintenance, or repairs of precipitation and drainage control facilities shall be completed to prevent storm water flows from: a. Contacting or percolating through wastes,