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Virginia Administrative Code
Title 9. Environment
Agency 25. State Water Control Board
Chapter 630. Virginia Pollution Abatement Regulation and General Permit for Poultry Waste Management

9VAC25-630-80. Utilization and storage requirements for transferred poultry waste.

A. Any poultry waste end-user or poultry waste broker who receives poultry waste shall comply with the requirements outlined in the following sections.

B. Storage requirements. Any poultry waste end-user or poultry waste broker who receives poultry waste shall comply with the requirements outlined in this section regarding storage of poultry waste in their possession or under their control.

1. Poultry waste shall be stored in a manner that prevents contact with surface water and ground water. Poultry waste that is stockpiled outside for more than 14 days shall be kept in a facility or at a site that provides adequate storage. Adequate storage shall, at a minimum, include the following:

a. Poultry waste shall be covered to protect it from precipitation and wind;

b. Storm water shall not run onto or under the stored poultry waste;

c. A minimum of two feet of separation distance to the seasonal high water table or an impermeable barrier shall be used under the stored poultry waste. All poultry waste storage facilities that use an impermeable barrier shall maintain a minimum of one foot of separation between the seasonal high water table and the impermeable barrier. Impermeable barriers shall be constructed of at least 12 inches of compacted clay, at least four inches of reinforced concrete, or another material of similar structural integrity that has a minimum permeability rating of 0.0014 inches per hour (1X10-6 centimeters per second); and

d. For poultry waste that is not stored under roof, the storage site must be at least:

(1) 100 feet from any surface water, intermittent drainage, wells, sinkholes, rock outcrops, and springs; and

(2) 200 feet from any occupied dwellings not on the end-user's or broker's property, unless the occupant of the dwelling signs a waiver of the storage site.

2. Poultry waste storage facilities constructed after December 1, 2000, shall not be located within a 100-year floodplain unless there is no land available outside the floodplain on which to construct the facility and the facility is constructed so that the poultry waste is stored above the 100-year flood elevation or otherwise protected from floodwaters through the construction of berms or similar best management flood control structures. For the purposes of determining the 100-year floodplain, a Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map (FIRM), a FEMA Letter of Map Amendment (LOMA), or a FEMA Letter of Map Revision (LOMR) shall be used.

C. Land application requirements. Any poultry waste end-user or poultry waste broker who (i) receives 10 or more tons of poultry waste in any 365-day period and (ii) land applies poultry waste shall follow appropriate land application requirements as outlined in this section. The application of poultry waste shall be managed to minimize adverse water quality impacts.

1. The maximum application rates can be established by the following methods:

a. Phosphorus crop removal application rates can be used when:

(1) Soil test phosphorus levels do not exceed the values listed in the following table:


Soil test P (ppm)

VPI & SU Soil test (Mehlich I) *

Eastern Shore and Lower Coastal Plain


Middle and Upper Coastal Plain and Piedmont


Ridge and Valley


* If results are from another laboratory the Department of Conservation and Recreation approved conversion factors must be used.

(2) The phosphorus crop removal application rates are set forth by regulations promulgated by the Department of Conservation and Recreation in accordance with § 10.1-104.2 of the Code of Virginia.

b. Poultry waste may be applied to any crop at the standard rate of 1.5 tons per acre once every three years when:

(1) In the absence of current soil sample analyses and recommendations; and

(2) Nutrients have not been supplied by an organic source, other than pastured animals, to the proposed land application sites within the previous three years of the proposed land application date of poultry waste.

c. Soil test recommendations can be used when:

(1) Accompanied by analysis results for soil tests that have been obtained from the proposed field or fields in the last three years;

(2) The analytical results are from procedures in accordance with 4VAC50-85-140 A 2 f; and

(3) Nutrients from the waste application do not exceed the nitrogen or phosphorus recommendations for the proposed crop or double crops. The recommendations shall be in accordance with 4VAC50-85-140 A 2 a.

d. A nutrient management plan developed by a certified nutrient management planner in accordance with § 10.1-104.2 of the Code of Virginia.

2. The timing of land application of poultry waste shall be appropriate for the crop, and in accordance with 4VAC50-85-140 A 4, except that no waste may be applied to ice covered or snow covered ground or to soils that are saturated. Poultry waste may be applied to frozen ground under the following conditions:

a. Slopes are not greater than 6.0%;

b. A minimum of a 200-foot vegetative or adequate crop residue buffer is maintained between the application area and all surface water courses;

c. Only those soils characterized by USDA as "well drained" with good infiltration are used; and

d. At least 60% uniform cover by vegetation or crop residue is present in order to reduce surface runoff and the potential for leaching of nutrients to ground water.

3. Poultry waste shall not be land applied within buffer zones. Buffer zones at waste application sites shall, at a minimum, be maintained as follows:

a. Distance from occupied dwellings: 200 feet (unless the occupant of the dwelling signs a waiver of the buffer zone);

b. Distance from water supply wells or springs: 100 feet;

c. Distance from surface water courses: 100 feet (without a permanent vegetated buffer) or 35 feet (if a permanent vegetated buffer exists). Other site-specific conservation practices may be approved by the department that will provide pollutant reductions equivalent or better than the reductions that would be achieved by the 100-foot buffer;

d. Distance from rock outcropping (except limestone): 25 feet;

e. Distance from limestone outcroppings: 50 feet; and

f. Waste shall not be applied in such a manner that it would discharge to sinkholes that may exist in the area.

4. In cases where poultry waste storage is threatened by emergencies such as fire or flood or where these conditions are imminent, poultry waste can be land applied outside of the spreading schedule outlined in the Fact Sheet. If this occurs, the end-user or broker shall document the land application information in accordance with 9VAC25-630-70 A 4.

D. Poultry waste end-users and poultry waste brokers shall maintain the records demonstrating compliance with the requirements of subsections B and C for at least three years and make them available to department personnel upon request.

E. The activities of the poultry waste end-user or poultry waste broker shall not contravene the Water Quality Standards (9VAC25-260), as adopted and amended by the board, or any provision of the State Water Control Law (§ 62.1-44 et seq. of the Code of Virginia).

F. Any duly authorized agent of the board may, at reasonable times and under reasonable circumstances, enter any establishment or upon any property, public or private, for the purpose of obtaining information or conducting surveys or investigations necessary in the enforcement of the provisions of this regulation.

Statutory Authority

§§ 62.1-44.15 and 62.1-44.17:1.1 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 26, Issue 6, eff. January 1, 2010; amended, Virginia Register Volume 27, Issue 4, eff. December 1, 2010; Volume 37, Issue 11, eff. February 17, 2021; Errata, 37:20 VA.R. 3333 May 24, 2021.

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