PURPOSE: This rule sets forth the requirements and procedures for operating permits for concentrated animal feeding operations. Minimum federal requirements are incorporated, and additional state requirements are included to provide increased environmental protection of sensitive watersheds.

PUBLISHER’S NOTE: The secretary of state has determined that the publication of the entire text of the material which is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. This material as incorporated by reference in this rule shall be maintained by the agency at its headquarters and shall be made available to the public for inspection and copying at no more than the actual cost of reproduction. This note applies only to the reference material. The entire text of the rule is printed here.

1. (1) Definitions.

   1. (A) Definitions as set forth in 10 CSR 20-2.010 and 10 CSR 20- 8.300 shall apply to the terms when used in this rule unless otherwise defined in subsection (B) below.

   2. (B) Other applicable definitions are incorporated as follows:

      1. 1. Animal—Domestic animals, fowls, or other types of live-

stock except for aquatic animals;

1. 2. Animal unit—A unit of measurement to compare vari-

ous animal types at an animal feeding operation. One (1) animal unit equals the following: 1.0 beef cow or feeder, cow/calf pair, veal calf, or dairy heifer; 0.5 horse; 0.7 mature dairy cow; 2.5 swine weighing over 55 pounds; 10 swine weighing less than 55 pounds; 10 sheep, lamb, or meat and dairy goats; 30 chicken laying hens or broilers with a wet handling system; 82 chicken laying hens without a wet handling system; 55 turkeys in grow-out phase; 125 chicken broilers, chicken pullets, or turkey poults in brood phase without a wet handling system;

1. 3. Animal unit equivalent—Any unique animal type, not

listed, that has a similar manure characteristic as one (1) of the listed animal unit categories. The department shall make the determination of an animal unit equivalent based upon manure characteristics that include manure volume and nutrient concentration;

1. 4. Animal feeding operation (AFO)—A lot, building, or

complex at an operating location where animals are stabled or confined and fed or maintained for a total of forty-five (45) days or more in any twelve- (12-) month period, and crops, vegetation, forage growth, or post-harvest residues cannot be sustained over at least fifty percent (50%) of the animal confinement area within the normal crop growing season;

1. 5. Catastrophic storm event—A precipitation event of

twenty-four- (24-) hour duration that exceeds the twenty-five- (25-) year, twenty-four- (24-) hour storm event as defined by the most recent publication of the National Weather Service Climate Atlas;

1. 6. Chronic weather event—The chronic weather event

will be based upon an evaluation of the ten (10) year return rainfall frequency over a ten- (10-) day, ninety- (90-) day, one hundred eighty- (180-) day, and three hundred sixty-five- (365-) day operating period. It is preferred the University of Missouri’s Missouri Climate Center will determine, within a reasonable time frame, when a chronic weather event is occurring for any given county in the state;

1. 7. Class I and Class II operation—An AFO or CAFO’s class

size is based on the operating level in animal units of an individual animal type at one (1) operating location. Once a CAFO becomes a Class I operation, the animal units of all confined animals at the operating location are summed to determine whether the operation is Class IA, IB, or IC. Operations that are smaller than the Class II category are considered unclassified. The class categories, sorted by animal type, are presented in the following chart: Beef cow, feeder, veal calf, 1.0 cow/calf pair, and dairy heifer 0.5 0.7 Mature Dairy cows 2.5 Swine weighing over 55 pounds

10 Swine weighing under 55 pounds

Ducks with a wet handling

Ducks without a wet handling

Swine weighing over

Chicken laying hens without a wet handling

Ducks with a wet handling system *Animal Units Horses

system

system

Animal Class Category

Class IA 7,000 3,000 to 6,999

574,000

35,000

1 Animal Unit =

10 Sheep, lambs, and meat and dairy goats

Chicken laying hens, pullets, and broilers with a wet handling system

55 Turkeys in grow-out phase Chicken laying hens without a wet handling system

Chicken broilers and pullets, and turkey poults in brood phase, all without a wet handling system

Class IB Class IC Class II 1,000 to 2,999 300 to 999

7,500 to

246,000 to 82,000 to 24,500 to

15,000 to 5,000 to 14,999 1,500 to 4,999 34,999

1. 8. Concentrated animal feeding operation (CAFO)—An

AFO that meets one (1) of the following criteria:

1. A. Class I operation;
2. B. Class II operation where either one (1) of the following

conditions are met:

1. (I) Pollutants are discharged into waters of the state

through a manmade ditch, flush system, or other similar manmade device; or

1. (II) Pollutants are discharged directly into waters of

the state which originate outside of and pass over, across, or through the production area or otherwise come into contact with the animals confined in the operation; or

1. C. An unclassified operation that is designated as a CAFO

in accordance with subsection (2)(D) of this rule;

1. 9. Critical watersheds—defined as the following:

   1. A. Watersheds for public drinking water lakes (L1 lakes

defined in 10 CSR 20-7.031 and identified in Table G);

1. B. Watersheds located upstream away from the dam

from all drinking water intake structures on lakes including the watershed of Table Rock Lake;

1. C. Areas in the watershed and within five (5) miles

upstream of any stream or river drinking water intake structure, other than those intake structures on the Missouri and Mississippi Rivers; and

1. D. Watersheds of the Current (headwaters to Northern

Ripley County Line), Eleven Point (headwaters to Hwy. 142), and Jacks Fork (headwaters to mouth) Rivers;

1. 10. Discharge—A CAFO is said to discharge when it is de-

signed, constructed, operated, or maintained such that a discharge of process waste to surface waters of the state will occur. A CAFO that discharges could include one (1) that continuously discharges process wastewater to surface waters of the state, as well as one that may only have an intermittent and sporadic discharge. Discharges of agricultural storm water is a nonpoint source and therefore not included within this definition;

1. 11. Dry process waste—A process waste mixture which

may include manure, litter, or compost (including bedding, compost, mortality by-products, or other raw materials which is commingled with manure) and has less than seventy-five percent (75%) moisture content and does not contain any free draining liquids;

1. 12. Flush system—Any animal waste moving or remov-

ing system utilizing the force of periodic liquid flushing as the primary mechanism for removing manure from animal containment buildings, as opposed to a primarily mechanical or automatic device. This definition does not include confinement buildings that utilize deep or shallow underfloor pits with pull plug devices;

1. 13. Land application area—Agricultural land which is

under the operational control of the CAFO owner or operator, whether it is owned, rented, or leased, to which manure, litter, or process wastewater from the production area is or may be applied;

1. 14. Multi-year phosphorus application—Phosphorus ap-

plied to a field in excess of the crop needs for that year. When multi-year phosphorus applications are followed, no additional manure, litter, or process wastewater is applied to the same land in subsequent years until the applied phosphorus has been removed from the field via harvest and crop removal or until subsequent soil testing allows for nitrogen-based rates;

1. 15. No-discharge operation—A CAFO is considered no-dis-

charge if the operation is designed, constructed, operated, and maintained in a manner such that the CAFO will not discharge to waters of the state. A discharge of agricultural storm water is a nonpoint source and therefore not included within this definition;

1. 16. Occupied residence—A residential dwelling which is

inhabited at least fifty percent (50%) of the year;

1. 17. Operating location—For purposes of determining CAFO

classification, an operating location includes all contiguous lands owned, operated, or controlled by one (1) person or by two (2) or more persons jointly or as tenants in common or noncontiguous lands if they use a common area for the land application of wastes. State and county roads are not considered property boundaries for purposes of this rule. Two (2) or more animal feeding operations under a common ownership are considered to be a single animal feeding operation if they adjoin each other or if they use a common area for the land application of wastes;

1. 18. Overflow—The discharge of process wastewater result-

ing from the filling of wastewater or manure storage structures beyond the point at which no more manure, process wastewater, or stormwater can be contained by the structure;

1. 19. Process wastewater—Water which carries or contains

manure, including manure commingled with litter, compost, or other animal production waste materials used in the operation of the CAFO. Also includes water directly or indirectly used in the operation of the CAFO for any or all of the following: spillage or overflow from confined animal or poultry watering systems; washing, cleaning, or flushing pens, barns, manure pits, or other CAFO facilities; and water resulting from the washing, or spray cooling of confined animals. Process wastewater also includes any water which comes into contact with any raw materials, products, or by-products feed, milk, eggs, or bedding;

1. 20. Production area—The non-vegetated portions of an

operation where manure, litter, or process wastewater from the AFO is generated, stored, and/or managed. The production area includes the animal confinement area, the manure storage area, the raw materials storage area, and the waste containment areas. The animal confinement area includes, but is not limited to, open lots, housed lots, feedlots, confinement houses, stall barns, free stall barns, milkrooms, milking centers, cowyards, barnyards, medication pens, walkers, animal walkways, and stables. The manure storage area includes, but is not limited to, lagoons, runoff ponds, storage sheds, stockpiles, under house or pit storages, liquid impoundments, static piles, and composting piles. The raw materials storage area includes, but is not limited to, feed and silage, silos, pads, and bunkers, and bedding materials. The waste containment area includes, but is not limited to, settling basins and areas within berms and diversions which separate uncontaminated storm water. Also included in the definition of production area is any egg washing or egg processing operation and any area used in the storage, treatment, or disposal of animal mortalities;

1. 21. Public building—A building open to and used routinely

by the public for public purposes;

1. 22. Vegetated buffer—A narrow, permanent strip of dense

perennial vegetation established parallel to the contours of and perpendicular to the dominant slope of the field for the purposes of slowing water runoff, enhancing water infiltration, and minimizing the risk of any potential nutrients or pollutants from leaving the field and reaching surface waters;

1. 23. Waste management system—Includes all structures

and equipment, used to collect, store, transfer, or treat manure, litter, and/or process waste water. A waste management system will be considered in operation when animals are placed in confinement; and

1. 24. Wet handling system—Wet handling system is the han-

dling of process wastewater that contains more than seventy five percent (75%) moisture content or has free draining liquids. A wet handling system includes, but is not limited to, lagoons, pits, tanks, all gravity outfall lines, recycle pump stations, recycle force mains, and appurtenances.

1. (2) Applicability and Application for Coverage.

   1. (A) Scope of Rule. This rule applies solely to manure, litter, and/or process wastewater management systems at concentrated animal feeding operations (CAFOs). CAFOs are point sources and are subject to both state and federal National Pollutant Discharge Elimination System (NPDES) regulations in accordance with sections 640.710 and 644.026, RSMo.

   2. (B) Permit Coverage Required—Any CAFO owner or operator shall obtain one (1) of the operating permits listed below prior to operating a waste management system at a concentrated animal feeding operation unless otherwise exempted under subsection (2)(E) of this rule:

      1. 1. NPDES general or site-specific operating permits—Owners

or operators of Class I CAFOs that discharge and Class II AFOs that are defined or designated as a CAFO, must obtain an NPDES operating permit. Class I CAFOs that do not discharge may also apply for coverage under an NPDES operating permit;

1. 2. State no-discharge operating permit—Owners or oper-

ators of Class I CAFOs that do not discharge and do not apply for coverage under an NPDES operating permit shall obtain and maintain coverage under a state no-discharge operating permit.

1. (C) CAFO Designation at Class II Size AFOs.

   1. 1. The department may designate an AFO as a concen-

trated animal feeding operation upon determining that it is a significant contributor of pollutants to waters of the state. In making such designation, the department shall consider the following factors:

1. A. The size of the AFO and the amount of wastes reach-

ing waters of the state;

1. B. The location of the AFO relative to waters of the state;
2. C. The means of conveyance of animal wastes and pro-

cess waste into waters of the state;

1. D. The slope, vegetation, rainfall, and other factors affect-

ing the likelihood or frequency of discharge of animal wastes manure and process waste into waters of the state; and

1. E. Other relevant factors.
2. 2. No AFO shall be designated under this section unless

the department has conducted an on-site inspection of the operation and determined that the operation should and could be regulated as a concentrated animal feeding operation. In addition, no AFO with number of animals below a Class II size operation may be designated as a CAFO unless—

1. A. Pollutants are discharged into waters of the state

through a manmade ditch, flushing system, or other similar manmade device; or

1. B. Pollutants are discharged directly into the waters of

the state which originate outside of the AFO and pass over, across, or through the AFO, or otherwise come into direct contact with the animals confined in the operation.

1. (D) Exemptions.

   1. 1. In accordance with section 640.758, RSMo, livestock

markets and auctions are exempt from the provisions of 10 CSR 20-6.300(3)(B)–(C), 10 CSR 20-6.300(3)(H), and 10 CSR 20-6.300(7).

1. 2. Permits are not required for nonpoint source discharges,

agricultural stormwater discharges, and return flows from irrigated agriculture. A precipitation related discharge of manure, litter, or process wastewater from land application areas under the control of a CAFO is considered an agricultural stormwater discharge when manure, litter, or process wastewater is applied in accordance with site-specific nutrient management practices that ensure appropriate agricultural utilization of the nutrients in the manure, litter, or process wastewater. (E) Operating Permit Applications. This section describes the application process and requirements for CAFO operating permits. A separate application for each operating location must be submitted to the department.

1. 1. The department will not examine the adequacy or effi-

ciency of the structural, mechanical, or electrical components of the waste management systems, only adherence to rules and regulations. The issuance of permits will not include approval of such features.

1. 2. The application shall include at a minimum the follow-

ing documents:

1. A. Title page of engineering report or similar document

sealed by a professional engineer including name of the operation, date the report was prepared, name and address of firm preparing the report, seal and signature of the engineer, and a statement indicating the project was designed in accordance with 10 CSR 20-8.300;

1. B. Narrative project summary. This shall describe the

existing and any proposed modifications to operating conditions including the number of confinement buildings or areas, the total design capacity in animal units and actual animal numbers for each type of animal, and an explanation of the existing and/or proposed modifications to the waste management system;

1. C. Include the amount of manure generated annually,

storage volume, and days of storage of all manure storage structures, including mortality composter;

1. D. A recent aerial or topographic map showing the ex-

tent of the production area including;

1. (I) All existing and proposed confinement buildings,

open lots, manure storage structures;

1. (II) Surface waters and areas subject to a one hundred

1. (100) year flood event within or adjacent to the production area; and

   1. (III) Production area setback distances in accordance

with 10 CSR 20-8.300(5)(B);

1. E. Nutrient Management Plan—

   1. (I) NPDES permit – applications shall include the oper-

ations’ nutrient management plan; or

1. (II) State no-discharge permit –applications for a new

permit shall include the operations’ nutrient management plan;

1. F. Applications for Class I CAFOs shall also include:

   1. (I) An aerial or topographic map that meets the re-

quirement of 10 CSR 20-6.300(3)(C)4.;

1. (II) Proof of neighbor notice to all parties listed in 10

CSR 20-6.300(3)(C)2.

1. 3. When an application is submitted incomplete or any of

the required permit documents are deficient, or if additional information is needed including, but not limited to, engineering design plans, the department will act in one (1) of the following ways:

1. A. The department may return the entire permit appli-

cation back to the applicant for re-submittal; or

1. B. The applicant and/or the applicant’s engineer will be

notified of the deficiency and will be provided time to address department comments and submit corrections. Processing of the application may be placed on hold until the applicant has corrected identified deficiencies.

1. 4. Applicants who fail to correct deficiencies and/or fail

to satisfy all department comments after two (2) certified department comment letters shall have the application returned as incomplete and the permit fee(s) shall be forfeited. The department will grant reasonable time extensions when the applicant requests additional time to respond to department comments, however, such requests must be in writing and must occur within the time frame set by the department.

1. 5. When the department has received all documents and

information necessary for a properly completed operating permit application, including appropriate permit fees, the department will, review the application and said documents for compliance with this regulation and 10 CSR 20-8.300 and, if met, act in one (1) of the following ways:

1. A. For an operation seeking coverage under the state

no-discharge general operating permit the department will issue the state no-discharge general operating permit; or

1. B. For an operation seeking coverage under the NPDES

operating permit the department will post for fifteen (15) days on the department’s webpage a notice of the pending CAFO NPDES permit. The notice will include an announcement of the opportunity for public review and comment on the CAFO’s nutrient management plan and draft NPDES permit. The department will consider all comments before issuing the operating permit.

1. (3) Operating Permit Requirements. These requirements apply to all operating permits unless otherwise specified.

   1. (A) General Requirements.

      1. 1. All operating permits required by this rule shall be

issued in accordance with applicable provisions of 10 CSR 20- 6.010, 10 CSR 20-6.011, 10 CSR 20-6.020, and 10 CSR 20-8.300. When the state regulations referenced within these rules are found to be incompatible with the requirements of 10 CSR 20- 6.300, the provisions of 10 CSR 20-6.300 will take precedence.

1. 2. In addition to the state requirements found in this rule,

all CAFO NPDES permits shall be issued in compliance with applicable federal regulation as set forth in 40 CFR 122.42(e), and 40 CFR 412, Subpart A through Subpart D, July 30, 2012, incorporated by reference, without any later amendments or additions, as published by the Office of the Federal Register, National Archives and Records Administration, Superintendent of Documents, Pittsburgh, PA 15250-7954.

1. 3. Permits shall allow the CAFO to operate at a level of an-

imal units not to exceed its respective class size (i.e., Class IC or IB). When determining the appropriate classification, a rolling twelve- (12-) month average method will be used. The rolling twelve- (12-) month average shall at no time exceed the upper threshold limit of the CAFO’s designated class size. CAFOs may change animal numbers and weights within its respective class size; however, such changes must not subsequently violate applicable effluent limitations found in section (4) of this rule or adversely impact the storage and handling capacities of the waste management system and may be subject to other appropriate conditions or limitations. If a Class I CAFO has reduced animal numbers and is operating as a Class II or smaller AFO, the operation may request termination of their operating permit. The rolling twelve- (12-) month average for the last twelve (12) months shall be submitted with the termination request. The department will then conduct an inspection to determine if the permit can be terminated. If the operation increases animal numbers to the Class I operating size, the owner or operator of the CAFO shall apply for an operating permit.

1. 4. Permits shall require the CAFO operator to provide the

recipient of any manure, litter, or process wastewater transfer, a current manure nutrient analysis.

1. 5. Mortalities must not be disposed of in any liquid manure

or process wastewater system, unless specifically designed to handle them. Mortalities must be handled in such a way as to prevent the discharge of pollutants to surface waters and prevent the creation of a public health hazard.

1. (B) Buffer Distances. Buffer distances shall be in accordance with section 640.710, RSMo unless exempted below:

   1. 1. When a CAFO proposes an expansion or modification

but does not increase to a larger classification size, the buffer distance requirements shall be applicable only to the proposed confinement buildings and wastewater storage structures unless exempted by paragraph 2. of this subsection. Neighbor notice requirements of subsection (C) of this section shall apply to all existing and proposed confinement buildings and wastewater storage structures. If the proposed expansion or modification results in an increase to a larger classification size, the buffer distance and neighbor notice requirement of the larger classification size will apply to all existing and proposed confinement buildings and wastewater storage structures unless exempted by paragraph 4. of this subsection.

1. 2. A concentrated animal feeding operation and any future

modification or expansion of a CAFO is exempt from buffer distance requirements, but not neighbor notice requirements, when it meets all of the following criteria:

1. A. The CAFO was in existence prior to June 25, 1996; and
2. B. The CAFO does not expand to a larger classification

size.

1. 3. When existing animal feeding operations or concen-

trated animal feeding operations expand to a larger class size, the buffer distances shall not apply to the portion of the operation in existence as of June 25, 1996.

1. 4. Buffer distances are not applicable to residences owned

by the concentrated animal feeding operation or a residence from which a written agreement for operation is obtained from the owner of that residence. When shorter buffer distances are proposed by the operation and allowed by the department, the written agreement for a shorter buffer distance shall be recorded with the county recorder and filed in the chain of title for the property of the land owner agreeing to the shorter buffer distance.

1. (C) Neighbor Notice Requirements. Neighbor notice shall be conducted in accordance with section 640.715, RSMo.

   1. 1. Acceptable forms of proof for submittal that neighbor

notice was sent include copies of mail delivery confirmation receipts, return receipts, or other similar documentation.

1. 2. All concentrated animal feeding operations shall sub-

mit, as part of the operating permit application, an aerial or topographic map of the production area. The maps shall show the operation layout, buffer distances, property lines, and property owners within one and one-half (1 1/2) times the buffer distance.

1. 3. The neighbor notice will expire if an operating permit

application has not been received by the department within twelve (12) months of initiating the neighbor notice requirements.

1. (D) Inspections.

   1. 1. Permits shall require the following minimum visual in-

spections at the production area:

1. A. Weekly inspections of all storm water diversion

devices, runoff diversion structures, and devices channeling contaminated storm water to the process wastewater storage;

1. B. Daily inspection of water lines, including wastewater,

drinking water, and cooling water lines that can be visually observed within the production area. The inspection of the drinking water and cooling water lines shall be limited to the lines that possess the ability to leak or drain to wastewater storage structures or may come in contact with any process waste;

1. C. Weekly inspections of the manure, litter, and process

wastewater impoundments. The inspection will note the level in liquid impoundments as indicated by the depth marker; and

1. D. Once per day when in use conduct leak inspections

on equipment used for land application of manure or process wastewater.

1. 2. Permits shall require the following minimum visual in-

spections at the land application area:

1. A. Monitoring of the perimeter of the application fields

once per day during land application to ensure that applied wastewater does not run off the fields where applied;

1. B. Monitor for drifting from spray irrigation; and
2. C. Hourly inspections of aboveground irrigation pipe-

lines when in use.

1. 3. Permits shall require that any deficiencies found as a

result of inspections be corrected as soon as possible.

1. (E) Record Keeping. This section pertains to all CAFO operating permits. All records required by this section shall be made available to the department upon request.

   1. 1. Permits shall require that the permittee maintain the

following records for the production area for a period of five (5) years from the date they are created:

1. A. A copy of construction and operating permits, permit

applications, and the nutrient management plan;

1. B. A once-per-week record documenting the daily visual

inspections performed as required in 10 CSR 20-6.300(3)(D) above;

1. C. Weekly records of the depth of the manure and pro-

cess wastewater in the liquid impoundments as indicated by the depth marker;

1. D. Records documenting any actions taken to correct

deficiencies. Deficiencies not corrected within thirty (30) days shall be accompanied by an explanation of the factors preventing immediate correction;

1. E. Records of mortalities management and practices

used by the operation which verify compliance with 10 CSR 20-6.300(3)(A)5. above;

1. F. Records of the date, time, and estimated volume of

any overflow; and

1. G. Records of the date, recipient name and address, and

approximate amount of manure, litter, or process wastewater transferred to another person.

1. 2. Permits shall require that the permittee maintain the

following records for the land application area for a period of five (5) years from the date they are created:

1. A. Expected crop yields;
2. B. The date(s) manure, litter, or process wastewater is

applied to each field;

1. C. Weather conditions at time of application and for

twenty-four (24) hours prior to and following application;

1. D. Test methods used to sample and analyze manure,

litter, process wastewater, and soil;

1. E. Results from manure, litter, process wastewater, and

soil sampling;

1. F. Explanation of the basis for determining manure ap-

plication rates, as provided in the technical standards;

1. G. Calculations showing the total nitrogen and phos-

phorus to be applied to each field, including sources other than manure, litter, or process wastewater;

1. H. Total amount of nitrogen and phosphorus actually

applied to each field, including documentation of calculations for the total amount applied;

1. I. The method used to apply the manure, litter, or pro-

cess wastewater; and

1. J. Date(s) of manure application equipment inspection.
2. (F) Annual Reports. This section is required for NPDES operating permits only. Annual reports shall comply with the federal regulation 40 CFR 122.42(e)(4), “Annual reporting requirements for CAFOs,” Jan. 8, 2018, as published by the Office of the Federal Register, National Archives and Records Administration, Superintendent of Documents, Pittsburgh, PA 15250-7954, which is hereby incorporated by reference and does not include later amendments or additions.

3. (G) Best Management Practices (BMPs)—Each CAFO subject to 10 CSR 20-6.300, that land applies manure, litter, or process wastewater must do so in accordance with the following practices:

   1. 1. Nutrient management plan. Operating permits shall

require a nutrient management plan be developed and implemented according to the requirements of 10 CSR 20-6.300(5). The plan must also incorporate the requirements of paragraph (3)(G)2. below. The CAFO must begin implementation of the plan upon the date of operating permit coverage;

1. 2. Manure, litter, and process wastewater applied to the

land application area must minimize phosphorus and nitrogen transport from the field to surface waters in compliance with the Missouri Concentrated Animal Feeding Operation Nutrient Management Technical Standard (NMTS) approved by the Clean Water Commission on March 4, 2009, in accordance with 40 CFR 123.36, as published by the Missouri Department of Natural Resources, Division of Environmental Quality, Water Protection Program, PO Box 176, Jefferson City, MO 65102-0176, which is hereby incorporated by reference into this rule without any later amendments or additions, or an alternative but equally protective standard subsequently approved by the department that includes, but is not limited to, the following:

1. A. Include a field-specific assessment of the potential

for phosphorus transport from the field to surface waters and address the form, source, amount, timing, and method of application of nutrients on each field to achieve realistic production goals, while minimizing nitrogen and phosphorus movement to surface waters;

1. B. Include appropriate flexibilities for any CAFO to

implement nutrient management practices to comply with the technical standards, including consideration of multiyear phosphorus application on fields that do not have a high potential for phosphorus runoff to surface water, phased implementation of phosphorus-based nutrient management, and other components, as determined appropriate by the department;

1. C. Require that manure be analyzed a minimum of once

annually for nitrogen and phosphorus content, and soil be analyzed a minimum of once every five (5) years for phosphorus content. The results of these analyses are to be used in determining application rates for manure, litter, and other process wastewater;

1. D. Include conditions that will ensure manure, litter, and

process wastewater applications are conducted in a manner that prevents surface runoff of process wastewater beyond the edge of the field. Such measures will include, but not be limited to, restricting the timing, soil conditions, and placement of manure during land application; and

1. E. Include appropriate land application setbacks that at

a minimum require manure, litter, and process wastewater be land applied not closer than one hundred feet (100') from any down-gradient surface waters, open tile line intake structures, sinkholes, agricultural well heads, or other conduits to surface waters unless the operation complies with one (1) of the following compliance alternatives:

1. (I) For surface and subsurface applications, a setback

consisting of a thirty-five foot- (35'-) wide vegetated buffer where applications of manure, litter, or process wastewater are prohibited; or

1. (II) The CAFO demonstrates that a setback or buffer

is not necessary because implementation of alternative conservation practices or field-specific conditions will provide pollutant reductions equivalent or better than the reductions that would be achieved by the one hundred foot (100') setback;

1. 3. Land application shall occur during daylight hours only.

Night time applications shall only occur when the department has approved the night time land application plan.

1. (H) Additional Requirements for Class IA CAFOs only. Secondary containments shall be installed in accordance with section 640.730, RSMo. Inspections shall be conducted in accordance with Section 640.725, RSMo, in addition to the following:

   1. 1. Inspections shall also include the structural integrity of

the collection system and containment structures along with any unauthorized discharges from the flush and wet handling systems. Records shall be maintained by the facility for a minimum of three (3) years on forms approved by the department.

1. 2. Secondary containment structure(s) or earthen dam(s)

shall be sized to contain a minimum volume equal to the maximum capacity of flushing in any twenty-four- (24-) hour period from all gravity outfall lines, recycle pump stations, and recycle force mains.

1. 3. Class IA concentrated animal feeding operations (both

new and those operations that wish to expand to Class IA size) are prohibited from the watersheds of the Current, Jacks Fork, and Eleven Point Rivers as described in 10 CSR 20-6.300(1)(B)9.D.

1. 4. A record of inspections when the water level is less than

twelve inches (12") from the emergency spillway shall be included with the operations annual report.

1. (4) Design Standards and Effluent Limitations.

   1. (A) Effluent Limitations Applicable to All Class I CAFOs.

      1. 1. New and expanding CAFOs shall be designed and con-

structed in accordance with 10 CSR 20-8.300.

1. 2. Effluent limits for subsurface waters shall be in accor-

dance with 10 CSR 20-7.015(7)(E).

1. 3. NPDES operating permits shall also comply with effluent

limitations as set forth in 40 CFR Part 412, Subpart A through Subpart D, July 30, 2012, without any later amendments or additions, as published by the Office of the Federal Register, National Archives and Records Administration, Superintendent of Documents, Pittsburgh, PA 15250-7954, which are hereby incorporated by reference.

1. 4. There shall be no discharge of manure, litter, or process

wastewater to waters of the state from a CAFO as a result of the land application of manure, litter, or process wastewater to land application areas under the operational control of the CAFO, except where it is an agricultural storm water discharge. When manure, litter, or process wastewater has been land applied in accordance with subsection (3)(G) of this rule, a precipitation-related discharge of manure, litter, or process wastewater from land areas under the control of the CAFO is considered to be an agricultural storm water discharge.

1. 5. A chronic weather event is a series of wet weather

events and conditions that can delay planting, harvesting, and prevent land application and dewatering practices at wastewater storage structures. When wastewater storage structures are in danger of an overflow due to a chronic weather event, CAFO owners shall take reasonable steps to lower the liquid level in the structure through land application, or other suitable means, to prevent overflow from the storage structure. Reasonable steps may include, but are not limited to, following the department’s current guidance on “Wet Weather Management Practices for CAFOs.” These practices shall be designed specifically to protect water quality during wet weather periods. A discharge resulting from a land application conducted during wet weather conditions is not considered an agricultural stormwater discharge and is subject to permit requirements. The department will determine, within a reasonable time frame, when a chronic weather event is occurring for any given county in Missouri. The determination will be based upon an evaluation of the one-in-ten (1- in-10) year return rainfall frequency over a ten- (10-) day, ninety- (90-) day, one hundred eighty- (180-) day, and three hundred sixty five- (365-) day operating period.

1. (B) Additional Limitations for State No-Discharge Operating Permits.

   1. 1. There shall be no discharge of manure, litter, or process

wastewater into surface waters of the state from the production area.

1. 2. If at any time a CAFO’s waste management system

is found to be discharging, the department may revoke the CAFO’s no-discharge permit and require the CAFO to seek coverage under an NPDES permit.

1. 3. If a discharge occurs at a CAFO with a state no-discharge

permit, the owner or operator must submit to the department for review and approval the following documentation: a description of the discharge, including the date, time, cause, duration, and approximate volume of the discharge, and a detailed explanation of the steps taken by the CAFO to permanently address the cause of the discharge that will ensure that a discharge from this cause does not occur in the future.

1. 4. When a discharge occurs at a CAFO, the CAFO will be

allowed to maintain coverage under the no-discharge permit when the following two (2) conditions are met:

1. A. The department determines that the specific cause

has been appropriately corrected so that the CAFO does not discharge; and

1. B. The CAFO has not had two (2) discharges at a given

site for the same cause in any five- (5-) year period.

1. 5. If a CAFO has two (2) separate discharge events brought

about by the same cause, the department may terminate the no-discharge permit in which case the CAFO will be required to seek coverage under a NPDES permit.

1. (C) Effluent Limitations Applicable to Class II and Smaller Sized AFOs. When a Class II or smaller sized AFO is designated as a CAFO by the department, the specific effluent limitations will be based upon the department’s best professional judgment. The specific effluent limits shall not be more stringent than those for Class I CAFOs.

1. (5) Nutrient Management Plans (NMP)—In accordance with paragraph (3)(G)1. of this rule, operating permits shall require the development and implementation of a nutrient management plan. A portion of a CAFO’s nutrient management plan includes the documents within a CAFO’s operating permit application and annual reports. The plan must comply with the requirements found within the Nutrient Management Technical Standard which will satisfy the criteria in subsections (G), (H), and (I) below. The NMP shall be maintained according to the requirements of paragraph (3)(G)2. of this rule. For NPDES permits only, any revisions to the NMP must be submitted to the department for review with the changes from the previous version identified. Substantial changes to the terms of the NMP incorporated into the NPDES operating will require a permit modification and a fifteen- (15-) day public notice period. The plan must, at a minimum, address the following areas:

   1. (A) Ensure adequate storage of manure, litter, and process wastewater, including procedures to ensure proper operation and maintenance of the storage facilities;
   2. (B) Ensure proper management of mortalities (i.e., dead animals) to ensure that they are not disposed of in a liquid manure, storm water, or process wastewater storage or treatment system that is not specifically designed to treat animal mortalities;
   3. (C) Ensure that clean water is diverted, as appropriate, from the production area. NMPs shall include, as necessary, controls, measures, or BMPs to properly manage storm water runoff at the operation. This would apply only to activities in or around the land application or production area that is under the control of the CAFO owner or operator, whether it is owned, rented, or leased. Examples of such activities could include winter feeding areas, stockpiling of manure and raw materials, or any other regulated CAFO activity that will contribute pollutants to waters of the state;
   4. (D) Prevent direct contact of confined animals with waters of the state;
   5. (E) Ensure that chemicals and other contaminants handled within animal production facilities are not disposed of in any manure, litter, process wastewater, or storm water storage or treatment system unless specifically designed to treat such chemicals and other contaminants;
   6. (F) Identify appropriate site-specific conservation practices to be implemented, including as appropriate buffers or equivalent practices, to control runoff of pollutants to waters of the state;
   7. (G) Identify protocols for appropriate testing of manure, litter, process wastewater, and soil;
   8. (H) Establish protocols to land apply manure, litter, or process wastewater in accordance with site specific nutrient management practices that ensure appropriate agricultural utilization of the nutrients in the manure, litter, or process wastewater; and
   9. (I) Identify specific records that will be maintained to document the implementation and management of the minimum elements described in subsections (A) through (H) of this section.

2. (6) Closure of Waste Storage Structures.

   1. (A) Class I operations that cease operation, or plan to close lagoons and other waste storage structures, shall comply with 10 CSR 20-6.010 as well as the requirements in this section—

      1. 1. Other concentrated animal feeding operations that

cease operation shall either close the waste storage structures in accordance with the closure requirements in subsection (6) (B) of this rule or shall continue to maintain all storage structures so that there is not a discharge to waters of the state.

1. (B) Closure Requirements—

   1. 1. Lagoons and waste storage structures shall be closed

by removal and land application of all wastewater and sludge at agricultural rates for fertilizer not to exceed the maximum nutrient utilization of the land application site and vegetation grown and shall be applied at controlled rates so that there will be no discharge to waters of the state; and

1. 2. After removal and proper land application of waste-

water and sludge, the earthen basins may be demolished by removing the berms, grading, and establish at least seventy percent (70%) plant density over one hundred percent (100%) of the site so as to provide erosion control, or the basin may be left in place for future use as a farm pond or similar uses.

1. (7) Concentrated Animal Feeding Operation Indemnity Fund for Class IA CAFO.

   1. (A) Participation in the Concentrated Animal Feeding Operating Indemnity Fund and its administration shall be in accordance with sections 640.740 through 640.747, RSMo.
   2. (B) For facilities permitted after June 25, 1996, the annual fee shall commence on the first anniversary of the operating permit
   3. (C) In no event shall a refund exceed the unencumbered balance in the Concentrated Animal Feeding Operation Indemnity Fund.
   4. (D) Each payment shall identify the following: state operating permit number, payment period, and permittee’s name and address. Persons who own or operate more than one (1) operation may submit one (1) check to cover all annual fees, but are responsible for submitting the appropriate information to allow proper credit for each permit file account.
   5. (E) Annual fees are the responsibility of the permittee. Failure to receive a billing notice is not an excuse for failure to remit the fees.

AUTHORITY: sections 640.710 and 644.026, RSMo 2016.* Original rule filed June 1, 1995, effective Jan. 30, 1996. Amended: Filed March 1, 1996, effective Nov. 30, 1996. Amended: Filed July 9, 1998, effective March 30, 1999. Amended: Filed May 12, 2008, effective Feb. 28, 2009. Amended: Filed July 14, 2011, effective April 30, 2012. Amended: Filed Jan. 26, 2016, effective Oct. 30, 2016. Amended: Filed June 13, 2018, effective Feb. 28, 2019. ** *Original authority: 640.710, RSMo 1996 and 644.026, RSMo 1972, amended 1973, 1987, 1993, 1995, 2000, 2012, 2014. **Pursuant to Executive Order 21-07, 10 CSR 20-6.300, subsection (2)(B) and paragraphs (3)(A)3., (3) (B)1., and (4)(A)1. was suspended from April 23, 2020 through August 31, 2021.