Section 02.04.30.131 - STORAGE AND CONTAINMENT FACILITY CRITERIAAll facilities required to maintain an NMP, pursuant to these rules, shall construct, operate and maintain all storage and containment facilities as follows:
01.Secondary or Final Storage Effluent Facility. Process water containment structures that are utilized as the secondary or final storage for effluent shall have a minimum two (2) vertical feet of freeboard. Process water and containment structures that are not the secondary or final storage for effluent shall have a minimum one (1) vertical feet of freeboard. a. Earthen storage and containment facilities less than ten (10) vertical feet high with a maximum high water line of eight (8) vertical feet shall have a top embankment width of at least eight (8) feet. The combined embankment slopes must be at least five (5) horizontal to one (1) vertical, and shall not exceed two (2) horizontal to one (1) vertical slope. Containment facilities greater than ten (10) vertical feet from the naturally occurring ground level shall meet the NRCS Idaho Conservation Practice Standard Waste Storage Facility Code 313 December 2004 embankment requirements.b. The inside bottom of the storage and containment facility shall be a minimum of two (2) feet above the high water table, bed rock, gravel, or permeable soils. For an earthen storage and containment facility, a soil liner shall be installed such that the specific discharge rate of the containment structure meet 1 x 10-6 cm3/cm2/sec or less. Concrete or synthetic liners must be constructed to ASAE and Appendix 10D specifications.c. Storage areas for byproduct, including compost and solid manure storage areas, shall be located on approved soils and appropriately protected to prevent run on, run off, and contamination of ground and surface water.d. Total containment volume shall be sufficient to contain: i. The runoff from a twenty-five (25) year, twenty-four (24) hour rainfall event; andii. Either three (3) inches of runoff from the accumulation of winter precipitation or the amount of runoff from the accumulation of precipitation from a one-in-five (1 in 5) year winter.e. All substances entering wastewater storage and containment facilities shall be composed of manure and process wastewater from the operation of the dairy, beef, poultry or commercial truck wash facility. The disposal of any other materials into a wastewater storage and containment facility, including, but not limited to, human waste, is prohibited.f. Maintenance is sufficient to allow regular inspection of the integrity of the systems.Idaho Admin. Code r. 02.04.30.131