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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 35. Oklahoma Department of Agriculture, Food, and Forestry |
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Chapter 17. Water Quality |
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Subchapter 4. Concentrated Animal Feeding Operations |
SECTION 35:17-4-12. Animal Waste Management Plans (AWMPs)
Latest version.
- (a) An AWMP or its equivalent shall be prepared, according to Departmental policy, for each facility prior to the submission of a CAFO license application. An AWMP or its equivalent may include, but is not limited to, a Comprehensive Nutrient Management Plan per NRCS guidance, or a Nutrient Management Plan per EPA guidance.(b) The AWMP shall include:(1) A plan with a proposed schedule for liquid and solid animal waste removal, including sludge.(2) A date log indicating weekly inspection of wastewater level in the retention structure, including specific measurement of wastewater level. Facilities using pits, ponds, or other waste retention structures for storage and treatment of storm water, manure, and process generated wastewater, including flush water waste handling systems, shall maintain in their wastewater retention structure sufficient capacity to contain rainfall and rainfall runoff from a 25-year, 24-hour rainfall event. The owner shall immediately restore sufficient capacity to contain a 25-year, 24-hour rainfall event after any rainfall event or accumulation of wastes or process generated wastewater which reduces capacity, weather permitting. The 25-year, 24-hour rainfall event capacity shall be in addition to the one (1) foot of freeboard required.(3) All calculations and all factors and assumptions used in determining land application rates, acreage, and crops for both solid and liquid animal wastes. Land application rates shall take into account the plant available nutrient contribution of any land applied animal wastes. The following requirements shall apply to land application of animal waste on land owned or leased by the owner:(A) Runoff from animal waste is prohibited where it results in a discharge to surface or groundwaters of the State. The owner shall provide controls for runoff and erosion as appropriate for site conditions.(B) Animal wastes shall not be applied when the ground is frozen or saturated or during rainfall events.(C) It shall be considered acceptable emergency procedures for a facility which has been properly designed, constructed, and operated and is in danger of an imminent overflow due to chronic or catastrophic rainfall to discharge wastewaters to land application sites for filtering prior to discharging to surface or groundwaters of the State.(D) Land application practices shall be managed so as to reduce or minimize the following:(i) Ponding or puddling of wastewater on the site.(ii) Adverse conditions that invite pests including flies and rodents.(E) Facilities including waste retention structures, waste storage sites, land application sites, ponds, pipes, ditches, pumps, and diversion and irrigation equipment shall be maintained to insure the ability to fully comply with the terms of these rules and the Pollution Prevention Plan.(F) Adequate equipment and land application area shall be available for removal of waste and wastewater as required to maintain the proper operating volume of the retention structure. A list of proposed or actual equipment shall be included.(G) Surface disposal of animal wastes in the 100-year flood plain, as established by the Federal Emergency Management Agency (FEMA), or near water courses is prohibited unless protected from inundation and damage that may occur during that flood event by adequate berms or other structures. The land application of animal wastes at agronomic rates shall not be considered surface disposal and is not prohibited.(H) Runoff from animal waste storage piles shall be retained on site.(I) Accumulation of water in animal waste storage areas shall be avoided.(J) Timing and rate of applications shall be in response to crop needs, assuming usual nutrient losses, expected precipitation, and soil conditions. Timing and rate of land application of animal waste shall be based on published materials approved by the Department.(K) Land application shall not occur in areas defined as do not apply areas in the waste application criteria of the USDA NRCS Waste Utilization Standard Conservation Practice Standard 633 and Nutrient Management Conservation Practice Standard Code 590, ortheir current replacement.(L) The AWMP shall identify areas which due to topography, activities, or other factors have a high potential for significant soil erosion. Where these areas have the potential to contribute pollutants to surface or groundwaters of the State, the Pollution Prevention Plan shall identify measures used to limit erosion and pollutant runoff. Land subject to excessive erosion shall be avoided.