Wisconsin Administrative Code › Department of Natural Resources › NR 600-699 - Environmental Protection - Hazardous Waste Management › Chapter NR 661 - Hazardous Waste Identification And Listing › Subchapter AA - Air Emission Standards for Process Vents › Section NR 661.1033 - Standards: closed-vent systems and control devices

Current through June 24, 2024
(1) A
				  remanufacturer or other person that stores or treats hazardous secondary
				  material in hazardous secondary material management units using closed-vent
				  systems and control devices used to comply with provisions of this part shall
				  comply with the provisions of this section.
(2) A control device involving vapor
				  recovery, such as a condenser or adsorber, shall be designed and operated to
				  recover the organic vapors vented to it with an efficiency of 95 weight percent
				  or greater unless the total organic emission limits specified in s.
				  NR 661.1032(1)
				  (a) for all affected process vents can be
				  attained at an efficiency less than 95 weight percent.
(3) An enclosed combustion device, such as a
				  vapor incinerator, boiler, or process heater, shall be designed and operated to
				  reduce the organic emissions vented to it by 95 weight percent or greater; to
				  achieve a total organic compound concentration of 20 ppmv, expressed as the sum
				  of the actual compounds, not carbon equivalents, on a dry basis corrected to 3
				  percent oxygen; or to provide a minimum residence time of 0.50 seconds at a
				  minimum temperature of 760°C. If a boiler or process heater is used as the
				  control device, the vent stream shall be introduced into the flame zone of the
				  boiler or process heater.
(4)
(a) A flare shall be designed for and
				  operated with no visible emissions as determined by the methods specified in
				  sub. (5) (a), except for periods not to exceed a total of 5 minutes during any
				  2 consecutive hours.
(b) A flare
				  shall be operated with a flame present at all times, as determined by the
				  methods specified in sub. (6) (b) 3.
(c) A flare shall be used only if the net
				  heating value of the gas being combusted is 11.2 MJ/scm or greater if the flare
				  is steam-assisted or air-assisted; or if the net heating value of the gas being
				  combusted is 7.45 MJ/scm or greater if the flare is non -assisted. The net
				  heating value of the gas being combusted shall be determined by the methods
				  specified in sub. (5) (b).
Note: 1 megajoule/meter3
					 [MJ/m3] = 26.8391919932 Btu
					 (IT)/foot3 [Btu/ft 
					 3].
(d)
1.
				  Except as provided in subs. (4) (d) 2. and 3., a steam-assisted or nonassisted
				  flare shall be designed for and operated with an exit velocity, as determined
				  by the methods specified in sub. (5) (c), less than 18.3 m/s.
2. A steam-assisted or nonassisted flare
				  designed for and operated with an exit velocity, as determined by the methods
				  specified in sub. (5) (c), equal to or greater than 18.3 m/s but less than 122
				  m/s is allowed if the net heating value of the gas being combusted is greater
				  than 37.3 MJ/scm.
3. A
				  steam-assisted or nonassisted flare designed for and operated with an exit
				  velocity, as determined by the methods specified in sub. (5) (c), less than the
				  velocity, V max, as determined by the method specified in sub. (5) (d) and less
				  than 122 m/s is allowed.
(e) An air-assisted flare shall be designed
				  and operated with an exit velocity less than the velocity, V max, as determined
				  by the method specified in sub. (5) (e).
(f) A flare used to comply with this section
				  shall be steam-assisted, air-assisted, or nonassisted.