Missouri Code of State Regulations › Title 10 - DEPARTMENT OF NATURAL RESOURCES › Division 20 - Clean Water Commission › Chapter 8 - Minimum Design Standards › Section 10 CSR 20-8.300 - Design of Concentrated Animal Feeding Operations

Current through Register Vol. 49, No. 14, July 15, 2024
PURPOSE: This proposed amendment corrects an
				  inadvertent deletion of definitions relevant to the design standards of
				  wastewater management and containment structures for concentrated animal
				  feeding operations.
(1)
				Applicability.
This rule applies to all new or expanding Concentrated
				  Animal Feeding Operations (CAFOs), however, only those applicants that are
				  constructing earthen basins are required to obtain construction permits. The
				  Missouri Department of Natural Resources (department) will not examine the
				  adequacy or efficiency of the structural, mechanical, or electrical components
				  of the concentrated animal feeding operation systems, only adherence to rules
				  and regulations.
(2)
				Definitions.
(A) Definitions as set forth in
				the Missouri Clean Water Law, Chapter 644, Concentrated Animal Feeding
				Operation (Hog Bill) section
				640.703, RSMo,
				10 CSR
				20-2.010, and
				10 CSR
				20-6.300 shall apply to the terms in this rule unless
				otherwise defined by subsection (2)(B) below.
(B) Other applicable definitions are as
				follows:
1. Design storage period-The
				calculated number of days that will fill the manure storage structure from the
				lower to the upper operating level for a covered storage structure or from the
				lower to the upper operating level for an uncovered, liquid storage structure
				during a period of average rainfall minus evaporation (R-E).
A. For a design storage period of fewer than
				three hundred sixty-five (365) days, the largest consecutive average monthly
				R-E, corresponding with the number of months of the storage period, shall be
				used.
B. For multiple storage
				stages, the storage period is the sum of available storage days in each
				stage.
C. For covered liquid manure
				storage structures, the upper operating level is one foot (1') below the top of
				the structure;
2.
				Freeboard-The elevation difference between the bottom of the spillway to the
				top of the berm for an earthen basin;
3. Groundwater table-The seasonal high water
				level occurring beneath the surface of the ground, including underground
				watercourses, artesian basins, underground reservoirs and lakes, aquifers,
				other bodies of water located below the surface of the ground, and water in the
				saturated zone. For the purposes of this rule, groundwater table does not
				include the perched water table;
4.
				Manure-The fecal and urinary excretion of animals;
5. Manure storage structure-A fabricated
				structure or earthen basin used to store manure, litter, and/or process
				wastewater;
6. Rainfall minus
				evaporation (R-E)- The average depth of monthly liquid precipitation minus
				evaporation as published in the most recent National Weather Service Climate
				Atlas for the geographical region of the proposed structure;
7. Safety depth-One foot (1') of liquid depth
				or the depth needed to hold the volume of the ten- (10-) year, ten- (10-) day
				storm, whichever is greater;
8.
				Solid manure-Manure that can be stacked without free flowing liquids;
9. Safety volume-The volume of wastewater
				stored between the upper pumpdown and emergency spillway crest;
10. Storage lagoon-A lagoon that does not
				have adequate volume to accomplish treatment;
11. Storage volume-The volume of manure,
				runoff, washwater, rainfall, and additional water sources between the lower and
				upper operating levels;
12. Ten-
				(10-) year, ten- (10-) day storm-The depth of rainfall occurring in a ten-
				(10-) day duration over a ten- (10-) year return frequency as defined by the
				most recent publication of the National Weather Service Climate Atlas for the
				geographical region of the proposed manure storage structure;
13. Total storage capacity-The combined
				volume of storage and safety volumes stored between the lower pumpdown level
				and emergency spillway crest;
14.
				Treatment volume-The permanent volume maintained below the lower pumpdown
				designed for anaerobic treatment of manure based on latitude;
15. Waste treatment lagoon-A lagoon that is
				sized to have three hundred sixty-five (365) days of storage volume and
				adequate treatment volume;
16.
				Wastewater-A combination of manure, washwater, runoff, rainfall, and process
				wastewater; and
17. Wastewater
				flow-The annual rate of wastewater contributed to an animal waste management
				system.