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WASTE DISCHARGE REQUIREMENTS ORDER R5-2015-0058-01 -41- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS FOOTHILL SANITARY LANDFILL, INC. FOOTHILL LANDFILL SAN JOAQUIN COUNTY explaining how the discharge occurred, why the waste cannot be removed, and any updates to the waste acceptance program necessary to prevent re- occurrence. If the waste is a hazardous waste, the Discharger shall immediately notify the Department of Toxic Substances Control. 5. Leachate and landfill gas condensate may be returned/discharged only to active LF-2 modules and Calaveras SI unit which are constructed and operated in accordance with this Order and only if consistent with Discharge Prohibition A.3. 6. After 15 October 2016, leachate and LFG condensate derived from LF-1 shall be discharged at an authorized on-site Class II surface impoundment unit or appropriately handled for offsite discharge (e.g., stored in tanks pending pick-up). See Facility Specification C.2 and C.3. 7. The discharge of dewatered sewage, septage, and/or water treatment sludge shall be limited to active LF-2 modules constructed and operated in accordance with this Order, including, but not necessarily limited to, Construction Specifications D.1 through D.4 and SPRR, Standard Prohibition C.1.b. 8. The beneficial reuse of wastes at LF-1 per Discharge Prohibition A.2.b shall be subject to the following restrictions: a. Inert wastes used in construction or repair of landfill final cover shall meet the project specifications contained in the approved construction documents described in, or submitted under, this Order and shall be applied consistent with the revised Partial FC/PCMP submitted under this Order. See Construction Specifications D.13 and D.15. b. Only clean soil (i.e., soil not containing any waste) may be used in the construction/repair of the ET cover; the erosion resistant and low hydraulic conductivity layers of prescriptive cover; cover berms and drains; side slope benches; landfill buttresses, and detention basin walls. c. Inert liquids (i.e., groundwater, surface water, or storm water) may be applied to landfill prescriptive or ET final cover for construction or maintenance purposes (e.g., dust control, limited irrigation of vegetative cover) consistent with Title 27, section 21090(a)(5)(B). 9. The Discharger shall only discharge waste to the Class II WMU as specified below: a. Designated waste as defined as: i. hazardous wastes subject to a variance from management requirements per Health and Safety Code section 25143; and ii. nonhazardous waste containing constituents that, under ambient conditions, could be released in concentrations exceeding WQOs, or could reasonably be expected to affect beneficial uses (Wat. Code, § 13173).