Iowa Admin. Code rr. 567-65.100 - Minimum manure control requirements
Confinement feeding operations shall be constructed, managed and maintained to meet the minimum manure control requirements stated in subrules 65.100(1) to 65.100(6). A release shall be reported to the department as provided in subrule 65.2(1). Dry manure stockpiling requirements are stated in subrule 65.100(7). Dry bedded manure stockpiling requirements are stated in subrule 65.100(8).
(1) The minimum
level of manure control for a confinement feeding operation shall be the
retention of all manure produced in the confinement enclosures between periods
of manure application and as specified in this rule. In no case shall manure
from a confinement feeding operation be discharged directly into a water of the
state or into a tile line that discharges to waters of the state.
a. Control of manure from confinement feeding
operations may be accomplished through use of manure storage structures or
other manure control methods. Sufficient capacity shall be provided in the
manure storage structure to store all manure between periods of manure
application. A confinement feeding operation, other than a SAFO, that is
constructed or expanded on or after July 1, 2009, shall not surface-apply
liquid manure on frozen or snow-covered ground when there is an emergency, as
described in subrule 65.101(4), unless the operation has a minimum of 180 days
of manure storage capacity. Additional capacity shall be provided if
precipitation, manure or wastes from other sources can enter the manure storage
structure.
b. Manure shall be
removed from the control facilities as necessary to prevent overflow or
discharge of manure from the facilities. Manure stored in unformed manure
storage structures or unformed egg washwater storage structures shall be
removed from the structures as necessary to maintain a minimum of two feet of
freeboard in the structure, unless a greater level of freeboard is required to
maintain the structural integrity of the structure or prevent manure overflow.
Manure stored in unroofed formed manure storage structures or formed egg
washwater storage structures shall be removed from the structures as necessary
to maintain a minimum of one foot of freeboard in the structure unless a
greater level of freeboard is required to maintain the structural integrity of
the structure or prevent manure overflow.
c. To ensure that adequate capacity exists in
the manure storage structure to retain all manure produced during periods when
manure application cannot be conducted (due to inclement weather conditions,
lack of available land disposal areas, or other factors), the manure shall be
removed from the manure storage structure as needed prior to these
periods.
d. Dry manure or dry
bedded manure originating at a confinement feeding operation may be retained as
a stockpile so long as the stockpiled dry manure or dry bedded manure meets the
following:
(1) Dry manure stockpiling
requirements provided in subrule 65.100(7) or dry bedded manure stockpiling
requirements provided in subrule 65.100(8).
(2) Applicable NPDES requirements pursuant to
the Act.
(3) The dry manure or dry
bedded manure is removed from the stockpile and applied in accordance with rule
567-56.101(459,459B) within six months after the dry manure or dry bedded
manure is first stockpiled.
(4) Dry
manure stockpiles are not required to meet the requirements in subparagraphs
65.100(1)"d"(1) to 65.100(1)"d"(3) above if
the dry manure originates from a confinement feeding operation that was
constructed prior to January 1, 2006, unless any of the following apply:
1. The confinement feeding operation is
expanded after January 1, 2006.
2.
Dry manure is stockpiled in violation of subrule 65.100(1).
3. Precipitation-induced runoff from the
stockpile has drained off the property.
(2) If site topography,
operation procedures, experience, or other factors indicate that a greater or
lesser level of manure control than that specified in subrule 65.100(1) is
required to provide an adequate level of water pollution control for a specific
AFO, the department may establish different minimum manure control requirements
for that operation.
(3) In lieu of
using the manure control methods specified in subrule 65.100(1), the department
may allow the use of manure treatment or other methods of manure control if it
determines that an adequate level of manure control will result.
(4) No direct discharge shall be allowed from
an AFO into a publicly owned lake, a sinkhole, or an agricultural drainage
well.
(5) All manure removed from an
AFO or its manure control facilities shall be land-applied in a manner that
will not cause surface or groundwater pollution. Application in accordance with
the provisions of state law and this chapter shall be deemed as compliance with
this requirement.
(6) As soon as
practical but not later than six months after the use of an AFO is
discontinued, all manure shall be removed from the discontinued AFO and its
manure control facilities and be land applied.
(7) Dry manure stockpiling requirements for a
confinement feeding operation.
a.
Requirements for terrain, other than karst terrain. Dry manure
stockpiled on terrain, other than karst terrain, for more than 15 consecutive
days shall comply with either of the following:
(1) Dry manure shall be stockpiled using any
of the following:
1. A qualified stockpile
structure; or
2. A qualified
stockpile cover. Long-term stockpiles utilizing a qualified stockpile cover
shall be placed on a constructed impervious base that can support the load of
the equipment used under all weather conditions. The coefficient of
permeability of the impervious base shall be less than 1×10-7 cm/sec
(0.00028 feet/day). Permeability results shall be submitted to the department
prior to use of the stockpile site.
(2) A stockpile inspection statement shall be
delivered to the department as follows:
1. The
department must receive the statement by the fifteenth day of each
month.
2. The stockpile inspection
statement shall provide the location of the stockpile and document the results
of an inspection conducted during the previous month. The inspection must
evaluate whether precipitation-induced runoff is draining away from the
stockpile and, if so, describe actions taken to prevent the runoff. If an
inspection by the department documents that precipitation-induced runoff is
draining away from a stockpile, the dry manure must be immediately removed from
the stockpile or comply with all directives of the department to prevent the
runoff.
3. The stockpile inspection
statement must be in writing and may be on a form prescribed by the
department.
b.
Dry manure stockpile siting prohibitions.
(1) Grassed waterway. A stockpile or
stockpile structure shall not be placed in a grassed waterway.
(2) Sloping land. A stockpile or stockpile
structure shall not be placed on land having a slope of more than 3 percent,
unless the dry manure is stockpiled using methods, structures, or practices
that contain the stockpile, including but not limited to silt fences, temporary
earthen berms, or other effective measures, and that prevent or diminish
precipitation-induced runoff from the stockpile.
(8) Prohibitions and siting restrictions for
dry bedded manure stockpiling requirements for a dry bedded confinement feeding
operation.
a. Prohibition in a grassed
waterway. A stockpile or stockpile structure shall not be placed in a grassed
waterway, where water pools on the soil surface, or in any location where
surface water will enter the stockpile.
b. Siting restrictions. A stockpile or
stockpile structure shall not be placed on land having a slope of more than 3
percent, unless the dry manure or dry bedded manure is stockpiled using
methods, structures, or practices that contain the stockpile, including but not
limited to hay bales, silt fences, temporary earthen berms, or other effective
measures that prevent or diminish precipitation-induced runoff from the
stockpile. A stockpile or stockpile structure located in karst terrain must
comply with the karst requirements in subrule 65.8(3).
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.