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ORDER N0. 1&201&0017 10 CONDITIONAL WAIVER OF WASTE DISCHARGE REQUIREMENTS FOR DISASTER-RELATED WASTES WITHIN THE CENTRAL VALLEY REGION prior to discharge by mixing with an absorbent material (e.g., saw dust, mulch, soil, etc.). g) The thickness of each layer of mass mortality wastes shall be limited to less than two feet, or the thickness of one animal carcass if greater than two feet. h) Lime (or another liquid abatement material) shall be added to each layer to help reduce the generation of liquid by the mass mortality wastes. i) Each layer of lime-covered mass mortality wastes shall be covered by at least three feet of soil, or an alternative material approved by Central Valley Water Board staff, before adding another layer of mass mortality wastes. Alternative materials shall not increase threat to underlying groundwater relative to using three feet of clean soil. j) Mass mortality wastes shall be discharged for disposal in compliance with the conditions of this Conditional Waiver and covered at the end of each working day. k) The final layer of disaster related mass mortality wastes discharged into the emergency landfill shall be overlain by a final layer of not less than three feet of soil, or an equivalent alternative approved by Central Valley Water Board staff. The final soil layer shall be placed in a mound configuration so that the final soil layer: 1) Overlaps the mass mortality wastes by several feet on each edge of the emergency landfill; 2) is at least three feet thick over all portions of the mass mortality wastes; and 3) is sloped to provide good drainage that does not impair the integrity of the emergency landfill. Side slopes shall not be steeper than 4 (horizontal) to 1 (vertical). 1) The owner/operator should also evaluate, implement, and document other effective waste isolation methods (and waste moisture reducing methods) in conjunction with the procedures identified above. 4. The mass mortality emergency landfill shall be designed, constructed, and operated to limit, to the greatest extent possible, ponding, infiltration, inundation, erosion, slope failure, and washout. The owner/operator shall protect the integrity of the final cover from adverse impacts due to erosion by installing and maintaining MMs/BMPs, including: a) Installation of runon control features on the upgradient side of the emergency landfill to divert offsite storm water from the emergency landfill. b) Installation of an effective runoff collection and conveyance ditch.