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<br />Concentrated animal feeding operations are required to be operated as no-discharge facilities, <br />Compliance with the no-discharge provision can only be achieved by installation and operation <br />of adequate manure and process wastewater collection, storage and land application facilities. <br /> <br />(1) Open concentrated animal feeding operations shall control all manure and process <br />wastewater including flows from the animal areas and all other flows from an <br />applicable storm event. Control of manure and process wastewater from open <br />concentrated animal feeding operations may be accomplished through use of <br />retention basins, terraces, or other runoff control methods. In addition, diversions of <br />uncontaminated surface drainage prior to contact with the concentrated animal <br />feeding operation or manure storage areas maybe required by the Division in order <br />to prevent water pollution, <br /> <br />(2) , Housed concentrated animal feeding operations shall control manure and process <br />wastewater produced in the confinement enclosures between periods of disposal. <br />Control of manure and process wastewater from housed animal feeding operations <br />may be accomplished through use of earthen storage structures (such as lagoons or <br />earthen basins), formed storage tanks (such as concrete, steel, or wood tanks), or <br />other control methods, Sufficient capacity shall be provided in the control structures <br />to store all manure and process wastewater between periods of disposal. Additional <br />capacity shall be provided if precipitation or discharges from oth.er sources can enter <br />the manure and process wastewater control structures. <br /> <br />(6) Design Criteria <br /> <br />(1) An operator of an existing concentrated animal feeding operation constructed prior <br />to April 16, 1974 and operated continuously since that time shall not discharge <br />manure, process wastewater or stormwater runoff from the facility to state waters <br />except as the result of storms equal to or in excess of the amount resulting from a <br />ten-year 24-hour storm. The 10 year 24-hour storm event design criterion applies to <br />all stormwater diversion structures (e.g. dikes, berms, ditches) as well as manure <br />and process wastewater retention and control ,structures. <br /> <br />(a) Any discharge to state waters shall be as the result of excess flow or overflow <br />beyond the properly designed and constructed retention capability or hydraulic <br />capacity of the manure or process wastewater control structures. A discharge <br />shall not result from dewatering or lowering of the process wastewater level or <br />solids storage level below the design retention capability of the control <br />structures, <br /> <br />(b) A concentrated animal feeding operation which changes ownership or <br />increases its average working capacity shall not discharge manure and <br />process wastewater or storm run-off water from the feeding operation to state <br />waters except as the result of storms in excess of a 25-Year 24-Hour storm <br />event. ' <br /> <br />6 <br />