Iowa Admin. Code rr. 567-65.101 - Requirements for land application of manure from a confinement feeding operation
(1)
General requirements for application rates and practices for
confinement feeding operations.
a.
For manure originating from an anaerobic lagoon or aerobic structure,
application rates and practices shall be used to minimize groundwater or
surface water pollution resulting from application, including pollution caused
by runoff or other manure flow resulting from precipitation events. In
determining appropriate application rates and practices, the person
land-applying the manure shall consider the site conditions at the time of
application including anticipated precipitation and other weather factors,
field residue and tillage, site topography, the existence and depth of known or
suspected tile lines in the application field, and crop and soil conditions,
including a good-faith estimate of the available water-holding capacity given
precipitation events, the predominant soil types in the application field and
planned manure application rate.
b.
Spray irrigation equipment shall be operated in a manner and with an
application rate and timing that does not cause runoff of the manure onto the
property adjoining the property where the spray irrigation equipment is being
operated.
c. For manure from an
earthen waste slurry storage basin, earthen manure storage basin, or formed
manure storage structure, restricted spray irrigation equipment shall not be
used unless the manure has been diluted with surface water or groundwater to a
ratio of at least 15 parts water to 1 part manure. Emergency use of spray
irrigation equipment without dilution shall be allowed to minimize the impact
of a release as approved by the department.
(2)
Separation distance requirements
for land application of manure. Land application of manure shall be
separated from objects and locations as specified in this subrule.
a. For liquid manure from a confinement
feeding operation, the required separation distance from a residence not owned
by the titleholder of the land, a business, a church, a school, or a public use
area is 750 feet, as specified in Iowa Code section
459.204. The separation distance
for application of manure by spray irrigation equipment shall be measured from
the actual wetted perimeter and the closest point of the residence, business,
church, school, or public use area.
b. The separation distance specified in
paragraph 65.101(2)"a" shall not apply if any of the following
apply:
(1) The liquid manure is injected into
the soil or incorporated within the soil not later than 24 hours after the
original application.
(2) The
titleholder of the land benefitting from the separation distance requirement
executes a written waiver with the titleholder of the land where the manure is
applied.
(3) The liquid manure
originates from a SAFO.
(4) The
liquid manure is applied by low-pressure spray irrigation equipment pursuant to
paragraph 65.101(2)"a."
c. Separation distance for spray irrigation
from property boundary line. Spray irrigation equipment shall be set up to
provide for a minimum distance of 100 feet between the wetted perimeter as
specified in the spray irrigation equipment manufacturer's specifications and
the boundary line of the property where the equipment is being operated. The
actual wetted perimeter, as determined by wind speed and direction and other
operating conditions, shall not exceed the boundary line of the property where
the equipment is being operated. For property that includes a road
right-of-way, railroad right-of-way or an access easement, the property
boundary line shall be the boundary line of the right-of-way or
easement.
d. Distance from
structures for low-pressure irrigation systems. Low-pressure irrigation systems
shall have a minimum separation distance of 250 feet between the actual wetted
perimeter and the closest point of a residence, a business, church, school or
public use area.
e. Waivers.
Waivers to paragraph 65.101(2)"c" may be granted by the
department if sufficient and proposed alternative information is provided to
substantiate the need and propriety for such action. Waivers may be granted on
a temporary or permanent basis. The request for a waiver shall be in writing
and include information regarding:
(1) The
type of manure storage structure from which the manure will be applied by spray
irrigation equipment.
(2) The spray
irrigation equipment to be used in the application of manure.
(3) Other information as the department may
request.
f. Agricultural
drainage wells. Manure shall not be applied by spray irrigation equipment on
land located within an agricultural drainage well area.
g. Designated areas. A person shall not apply
manure on land within 200 feet from a designated area or in the case of a
high-quality water resource, within 800 feet, unless one of the following
applies:
(1) The manure is land-applied by
injection or incorporation on the same date as the manure was
land-applied.
(2) An area of
permanent vegetation cover, including filter strips and riparian forest
buffers, exists for 50 feet surrounding the designated area other than an
unplugged agricultural drainage well or surface intake to an unplugged
agricultural drainage well, and the area of permanent vegetation cover is not
subject to manure application.
h. Setback requirements for confinement
feeding operations with NPDES permits. For confinement feeding operations with
NPDES permits, the following is adopted by reference:
40 CFR
412.4(a), (b) and
(c)(5).
(3)
Surface application of liquid
manure on frozen or snow-covered ground. A person who applies liquid
manure on frozen or snow-covered ground shall comply with applicable NPDES
permit requirements pursuant to the Act and also shall comply with the
following requirements:
a.
Snow-covered ground. During the period beginning December 21
and ending April 1, a person may apply liquid manure originating from a manure
storage structure that is part of a confinement feeding operation on
snow-covered ground only when there is an emergency.
b.
Frozen ground. During the
period beginning February 1 and ending April 1, a person may apply liquid
manure originating from a manure storage structure that is part of a
confinement feeding operation on frozen ground only when there is an
emergency.
c.
What
constitutes an emergency. For the purposes of this subrule, an
emergency application is only allowed when there is an immediate need to apply
manure to comply with the manure retention requirement of subrule 65.100(1) due
to unforeseen circumstances affecting the storage of the liquid manure. The
unforeseen circumstances must be beyond the control of the owner of the
confinement feeding operation, including but not limited to natural disaster,
unusual weather conditions, or equipment or structural failure. The
authorization to apply liquid manure pursuant to this subrule does not apply to
either of the following:
(1) An immediate need
to apply manure in order to comply with the manure retention requirement of
subrule 65.100(1) caused by the improper design or management of the manure
storage structure, including but not limited to a failure to properly account
for the volume of the manure to be stored. Based on the restrictions described
in paragraphs 65.101(3)"a" and "b" and the
possibility that the ground could be snow-covered and frozen for the entire
period of December 21 to April 1, an operation should not plan to apply liquid
manure during that time period. Confinement feeding operations with manure
storage structures constructed after May 26, 2009, and without alternatives to
manure application must have sufficient storage capacity to retain manure
generated from December 21 to April 1 under normal circumstances in order to
properly account for the volume of manure to be stored. For confinement feeding
operations that have no manure storage structures constructed after May 26,
2009, the department will accept insufficient manure storage capacity as a
reason for emergency application in the notification required in subrule
65.101(3).
(2) Liquid manure
originating from a confinement feeding operation constructed or expanded on or
after July 1, 2009, if the confinement feeding operation has a capacity to
store manure for less than 180 days.
d.
Procedure for emergency
application. A person who is authorized to apply liquid manure on
snow-covered ground or frozen ground when there is an emergency shall comply
with all of the following:
(1) The person
must notify the appropriate department field office by telephone prior to the
application. The department will not consider the notification complete unless
the owner's name, facility name, facility ID number, reason for emergency
application, application date, estimated number of gallons of manure to be
applied, and application fields as listed in the MMP are given. In cases where
the emergency is not easily confirmed by weather reports, the owner must make
documentation of the emergency available to the field office upon
request.
(2) The liquid manure must
be applied on land identified for such application in the current MMP
maintained by the owner of the confinement feeding operation as required in
subrule 65.111(7). The land must be identified in the current MMP prior to the
application, and that change must also be reflected in the next annual update
or complete MMP submitted to the department and county boards of supervisors
following the application as required in paragraph
65.110(3)"b."
(3)
The liquid manure must be applied on a field with a phosphorus index rating of
2 or less.
(4) Any surface water
drain tile intake that is on land in the owner's MMP and located downgradient
of the application must be temporarily blocked beginning not later than the
time that the liquid manure is first applied and ending not earlier than two
weeks after the completion of the application.
(5) Additional measures to contain runoff may
be necessary in order to prevent violation of federal effluent standards in
subrule 62.4(12).
e.
Exceptions. Paragraphs 65.101(3)"a" through
"d" do not apply to any of the following:
(1) The application of liquid manure
originating from a SAFO.
(2) The
application of liquid manure injected or incorporated into the soil on the same
date.
Notes
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