Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1.
General.
This part describes the requirements for construction and
record keeping for poultry barn floors. Owners of poultry barns at which
abandonment of the facility exposes the barn floor shall remove and land apply
all manure and manure-contaminated soil according to part
7020.2225.
Subp. 2.
Construction requirements for
concrete-lined or asphalt-lined floors.
All new concrete-lined or asphalt-lined poultry barn floors
must be constructed and maintained according to the following:
A. the floor thickness must be a minimum of
3.5 inches for concrete and a minimum of two inches for asphalt;
B. the floors must be inspected by the owner
or operator after each cleaning of the poultry barn floors; and
C. cracks and joints, which may extend
through the concrete-lined or asphalt-lined floor, must be sealed.
Subp. 3.
Construction
requirements for soil-lined floors.
All new soil-lined poultry barn floors must be constructed
and maintained according to items A to E.
A. The completed thickness of the constructed
soil liner must be:
(1) 12 inches or more of
compacted soil; or
(2) eight inches
or more of compacted soil placed over an underlayment that consists of:
(a) three inches of sand consisting of at
least 80 percent particles passing a number 4 sieve, less than ten percent
particles passing a number 200 sieve, and no particles greater than one inch.
Particle size analyses must be performed according to ASTM D-422; or
(b) a geo-textile fabric that weighs at least
12 ounces per square yard and has a minimum hydraulic conductivity of 0.30
cm/sec.
B.
Soils used for construction of the floor must meet the following requirements:
(1) have at least 30 percent particles
passing a number 200 sieve, less than 20 percent retained on a number 4 sieve,
and no rocks greater than three inches in diameter. Particle size analyses must
be performed according to ASTM D-422;
(2) have a plasticity index greater than
seven percent according to ASTM D-4318;
(3) be placed in a minimum of two lifts, each
lift being a minimum of four inches of in-place thickness;
(4) be maintained at a moisture content of
zero to five percent above optimum as determined by ASTM D-698 or ASTM D-1557
during construction; and
(5) be
compacted:
(a) with at least three passes of
a sheepsfoot or padfoot-type compaction equipment with feet that extend through
the loose lift of soil into the previous lift; or
(b) until achievement of 90 percent of
standard proctor density. The density must be verified according to ASTM 2922,
at a frequency of one sample per 3,000 square feet.
C. The poultry barn floor must be
placed at least three feet above bedrock or the water table.
D. The soil liner must be refurbished with at
least a two-inch lift of soils meeting the requirements of item B, prior to the
floor thickness being diminished by two inches from the thickness required in
item A.
E. Cracks that may extend
through the floor must be repaired.
F. The floor must not be saturated at any
time during the service life of the floor.
Subp. 4.
Construction requirements for
polyvinyl chloride (PVC) lined floors.
A. A seamless or factory seamed PVC liner
having a thickness of not less than 30 mils must be placed at a depth of at
least six inches below the final elevation of the poultry barn floor.
B. The upper six inches of the floor must be
constructed of protective material that meets manufacturer's recommendations
and provides adequate protection of the PVC liner. This protective layer must
not consist of any particles that will inflict damage to the liner.
Subp. 5.
Record
keeping.
The owner shall record and retain on permanent file the
results of all testing required in subpart
3 and make these records
available to the commissioner or county feedlot pollution control officer upon
request.
Subp. 6.
Notifications of construction.
An owner shall notify the commissioner or county feedlot
pollution control officer of intent to construct a minimum of three business
days prior to commencement of construction and within three business days
following completion of construction. Notification must be completed by letter,
telephone, facsimile, or electronic mail and include:
A. the permit number, if
applicable;
B. the owner's name,
and the name of the facility if different than the owner;
C. the site location by county, township,
section, and quarter section; and
D. the name of the contractor responsible for
installing the floor.
Statutory Authority: MS s
115.03;
116.07;
122.23