Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 415 - Control Of Particulate Emissions
Section NR 415.05 - Particulate matter emission limits for processes

Universal Citation: WI Admin Code ยง NR 415.05

Current through August 26, 2024

No person may cause, allow or permit the emission of particulate matter to the ambient air from a direct or portable source involving a process in excess of the following limitations:

(1) All direct and portable sources on which construction or modification was commenced on or before April 1, 1972 shall meet the emission limitations of this subsection.

(a) Cupolas melting more than 200 tons of metal in any year: 0.45 pounds of particulate matter per 1,000 pounds of gas.

(b) Electric arc or induction furnaces: 0.10 pounds of particulate matter per 1,000 pounds of gas.

(c) Open hearth furnaces: 0.20 pounds of particulate matter per 1,000 pounds of gas.

(d) Basic oxygen furnaces: 0.10 pounds of particulate matter per 1,000 pounds of gas.

(e) Sintering plants: 0.20 pounds of particulate matter per 1,000 pounds of gas.

(f) Air melting furnaces: 0.30 pounds of particulate matter per 1,000 pounds of gas.

(g) Heating or preheating furnaces: 0.30 pounds of particulate matter per 1,000 pounds of gas.

(h) Blast furnaces: 0.20 pounds of particulate matter per 1,000 pounds of gas.

(i) Asphalt, concrete or aggregate mix plants: 0.30 pounds of particulate matter per 1,000 pounds of gas.

(j) Cement kilns: 0.20 pounds of particulate matter per 1,000 pounds of gas.

(k) Lime kilns: 0.20 pounds of particulate matter per 1,000 pounds of gas.

(L) Cement klinker coolers: 0.30 pounds of particulate matter per 1,000 pounds of gas.

(m) Grinding, drying, mixing, conveying, sizing or blending: 0.20 pounds of particulate matter per 1,000 pounds of gas.

(n) Grain processing or handling: 0.40 pounds of particulate matter per 1,000 pounds of gas.

(o) Any other process not enumerated: 0.40 pounds of particulate matter per 1,000 pounds of gas.

(2) All direct and portable sources on which construction or modification is commenced after April 1, 1972 shall meet the emission limitations of this subsection. The allowable emissions of particulate matter are calculated by the use of the equation

E - 3.59 P0.62

for process weight rates up to 60,000 pounds per hour and by use of the equation

E - 17.31 P0.16

for process weight rates of 60,000 pounds per hour or more, where E is the allowable emissions in pounds per hour and P is the process weight rate in tons per hour. If the calculated emission rate is less restrictive than the applicable concentration specified under sub. (1) based on the maximum exhaust flow rate and normal exhaust gas temperature, the limitation under sub. (1) shall apply.

Note: Some examples of these calculations are given in the following table.

Process Weight Rate (lbs/hr)

Emission Rate (lbs/hr)

50..........................

................... 0.36

100..........................

................... 0.56

500 ..........................

................... 1.52

1,000 ..........................

................... 2.33

5,000 ..........................

................... 6.33

10,000 ..........................

................... 9.74

20,000 ..........................

................... 14.96

60,000 ..........................

................... 29.57

80,000 ..........................

................... 31.23

120,000 ..........................

................... 33.33

160,000 ..........................

................... 34.90

200,000 ..........................

................... 36.16

400,000 ..........................

................... 40.41

1,000,000 ..........................

................... 46.79

(3) In addition to meeting the requirements of subs. (1) and (2), any direct or portable source located in or near an area identified in s. NR 415.035(2) whose aggregate particulate emissions, excluding fugitive dust, may cause an impact on the ambient air quality in the areas equal to or greater than an annual concentration of one microgram per cubic meter or a maximum 24-hour concentration of 5 micrograms per cubic meter shall meet the following RACT emission limitations:

(a) Sources on which construction or modification was commenced on or before April 1, 1972 may not emit more than 0.20 pounds of particulate matter per 1000 pounds of exhaust gas.

(b) Sources on which construction or modification was commenced after April 1, 1972 may not emit more than the emissions limits of sub. (2) or 0.20 pounds of particulate matter per 1000 pounds of exhaust gas, whichever is more restrictive.

(4) Notwithstanding sub. (3), any cupola may emit up to, but not more than 0.25 pounds of particulate matter per 1000 pounds of exhaust gas.

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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