Current through Register Vol. 47, No. 6, September 18, 2024
Nonliquid fertilizer and soil conditioner stored in a totally
enclosed building and a soil conditioner meeting the requirements of subrule
44.56(3) are exempt from the requirements of this rule. Unless stored in a
totally enclosed building, or soil conditioners meeting the requirements under
subrule 44.56(3), all nonliquid fertilizer and soil conditioner materials shall
be stored within an area which drains into a secondary containment structure.
The secondary containment structure shall have a volume sufficient to retain
the equivalent of 12 inches of runoff from the area drained into the
containment structure. This minimum storage volume may be provided within the
containment structure or in auxiliary storage tanks, and may be constructed of
earth, concrete, or a combination of both.
(1) Secondary containment structures
constructed entirely or partially of earth shall comply with the following
requirements:
a. The soil surface, including
dike, shall be constructed to prevent downward water movement at rates greater
than 1 x 10-6cm/sec., and shall be maintained to
prevent downward water movement at rates greater than 1 x
10-5cm/sec. The method of achieving a satisfactory
seal shall be determined by a registered engineer.
b. Dike shall be protected against erosion.
If the slope is 30 degrees or less, grass can be sufficient protection,
provided it does not interfere with the required soil seal. If greater than 30
degrees, other methods of erosion protection shall be used.
c. Top width of dike shall be no less than
21/2; feet. The slope should be no greater than 45 degrees.
d. The diked area shall not have a relief
outlet.
e. All liquid and other
material collected shall be field applied at normal fertilizer application
rates or transferred to auxiliary storage tanks.
(2) Runoff collection structures constructed
of concrete shall comply with the following requirements:
a. The base of the structure shall be
maintained to prevent downward water movement.
b. The diked area shall not have a relief
outlet.
c. All liquid and other
material collected shall be field applied at normal fertilizer application
rates or transferred to auxiliary storage tanks.
(3) Soil conditioners consisting entirely of
minimally manipulated manures are exempt from the requirements of this rule if
all of the following apply to the storage of the soil conditioner:
a. The soil conditioner is stored in an
impermeable container.
b. The soil
conditioner is stored in the field of application or adjacent fields of
application and the amount stored does not exceed the necessary amount of
nitrogen, phosphorus, or potassium to achieve optimal crop yields, as
determined by average county or proven yields, on the acres in the fields of
application. The total potential acres of application stored in any field shall
not exceed an amount necessary for application on 160 acres.
c. The soil conditioner is stored in the
field for a period not to exceed six months.
d. The soil conditioner meets all of the
storage requirements for bulk dry animal nutrients under rule
21-49.7 (200A).
