ATCP 51.20(3)(a)(a) Feed storage shall be managed to prevent any significant discharge of leachate or polluted runoff from stored feed to waters of the state.
ATCP 51.20(3)(b)
(b) If an existing paved area may be used, without substantial alteration, to store or handle feed with a 70% or higher moisture content:
ATCP 51.20(3)(b)1.
1. Surface water runoff shall be diverted from entering the paved area.
ATCP 51.20(3)(b)2.
2. Surface discharge of leachate from stored feed shall be collected before it leaves the paved area, if the paved area covers more than one acre. Collected leachate shall be stored and disposed of in a manner that prevents discharge to waters of the state.
ATCP 51.20 Note
Note: Feed leachate is a potentially serious water pollutant. Paved areas include paved feed storage bunkers and handling areas. Collected leachate may, for example, be transferred to waste storage and applied to land at agronomic rates.
ATCP 51.20(3)(c)
(c) A new or substantially altered feed storage structure, including any building, bunker, silo or paved area used for feed storage or handling, shall be designed, constructed and maintained to the following standards if it may used to store or handle feed with a 70% or higher moisture content:
ATCP 51.20(3)(c)1.
1. Surface water runoff shall be diverted from entering the feed storage structure.
ATCP 51.20(3)(c)2.
2. Surface discharge of leachate shall be collected before it leaves the feed storage structure.
ATCP 51.20(3)(c)3.
3. The top of the feed storage structure floor shall be at least 3 vertical feet from groundwater and bedrock.
ATCP 51.20(3)(c)4.
4. If the feed storage structure covers more than 10,000 square feet, it shall have an effective subsurface system to collect leachate that may leak through the structure floor. The system shall consist of drainfill material, a tile drainage network, and an effective sub-liner as specified in
Appendix A, worksheet 5, section II.C.
ATCP 51.20(3)(c)5.
5. Collected leachate shall be stored and disposed of in a manner that prevents discharge to surface water or groundwater.
ATCP 51.20 Note
Note: Collected leachate may, for example, be transferred to waste storage and applied to land at agronomic rates.
