Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 447 - Control of asbestos emissions
Section NR 447.15 - Air cleaning
Universal Citation: WI Admin Code ยง NR 447.15
Current through August 26, 2024
(1) The owner or operator who uses air cleaning, as specified in ss. NR 447.03(1), 447.05(2) (a) 2., 447.08(3) (a) 2. a. or (4) (b), 447.09 (1) (b) 2., 447.10 (2) (a) 2., 447.12 (2) or (3) (a) 2., 447.13 (1) (a) 2. or (b) 2., and 447.18 (5) shall:
(a) Use fabric filter collection devices,
except as noted in sub. (2), doing all of the following:
1. Ensuring that the airflow permeability, as
determined by ASTM Method D737-96, incorporated by reference in s.
NR 484.10(10), does not exceed 9
m3/min/m2 (30 ft3min/ft2) for woven fabrics or 11 m3/min/m2 (35 ft3/min/ft2)
for felted fabrics, except that 12 m3/min/m2 (40 ft3/min/ft2) for woven and 14
m3/min/m2 (45 ft3/min/ft2) for felted fabrics is allowed for filtering air from
asbestos ore dryers.
2. Ensuring
that felted fabric weighs at least 475 grams per square meter (14 ounces per
square yard) and is at least 1.6 millimeter (one-sixteenth inch) thick
throughout.
3. Avoiding the use of
synthetic fabrics that contain fill yarn other than that which is
spun.
(b) Properly
install, use, operate and maintain all air-cleaning equipment authorized by
this section. Bypass devices may be used only during upset or emergency
conditions and then only for so long as it takes to shut down the operation
generating the particulate asbestos material.
(c) For fabric filter collection devices
installed after January 10, 1989, provide for easy inspection for faulty
bags.
(2) There are the following exceptions to sub. (1) (a):
(a) If
the use of fabric creates a fire or explosion hazard, or the department
determines that a fabric filter is not feasible, the department may authorize
as a substitute the use of wet collectors designed to operate with a unit
contacting energy of at least 9.95 kilopascals (40 inches water gage
pressure).
(b) Use of a High
Efficiency Particulate Air (HEPA) filter that is certified to be at least
99.97% efficient for 0.3 micron particles.
(c) Use of an alternative filtering equipment
that has received prior authorization from the administrator.
Disclaimer: These regulations may not be the most recent version. Wisconsin may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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