NR 445.07 Note
Note: See department draft memo dated July 7, 1999, Wood Combustion and Compliance with Chapter
NR 445, for further information regarding the use of this exemption. The draft memo may obtained by contacting the Compliance and Enforcement Section of the Bureau of Air Management at 608-266-7718.
NR 445.07(6)(a)(a) The emission thresholds in columns (c) to (f) in Tables A, B and C for any hazardous air contaminant may only be used if emissions from the source are vented to the atmosphere in a manner that meets both of the following:
NR 445.07 Note
Note: Valves designed to open and close at the point of discharge are not considered to be obstructions if they are open at time of emission.
NR 445.07(6)(a)2.
2. The emissions are from a stack that is within 10 degrees of vertical.
NR 445.07(6)(b)
(b) For purposes of calculating non-exempt, potential to emit emissions for comparison with the threshold rates in column (c), (d), (e) or (f) in the tables the owner or operator of a source shall do all of the following:
NR 445.07(6)(b)1.
1. Combine non-exempt, potential to emit emissions for each contaminant for all stacks within each of the 4 stack categories.
NR 445.07(6)(b)2.
2. Compare each group of non-exempt, potential to emit emissions against the respective threshold found in column (c), (d), (e) or (f) in the table.
NR 445.07(6)(c)
(c) For any group of non-exempt, potential to emit emissions that exceeds the respective threshold in column (c), (d), (e) or (f), consider all non-exempt, potential emissions from the source in determining compliance with the applicable standard or control requirement.
-
See PDF for table 
-
See PDF for table NR 445.07 Note
Note:
The emission rates in columns (c) to (f) in Table A for any hazardous air contaminant may only be used if emissions are from an unobstructed vertical discharge point. Owners and operators of sources unable to use this table should refer to s. NR 445.08(2).
1 For purposes of calculating non-exempt, potential to emit emissions for comparison with the threshold value in column (c), (d), (e) or (f) in the table the owner or operator of a source would:
- combine non-exempt, potential to emit emissions for each contaminant for all stacks within each of the 4 stack categories,
- compare each group of non-exempt, potential to emit emissions against the respective threshold found in column (c), (d), (e) or (f) in the table
- if any group exceeds it's respective threshold in column (c), (d), (e) or (f), consider all non-exempt, potential to emit emissions from the source in determining compliance with the applicable standard or control requirement.
- See PDF for table NR 445.07 Note
Note: The emission rates in columns (c) to (f) in Table B for any hazardous air contaminant may only be used if emissions are from an unobstructed vertical discharge point. Owners and operators of sources unable to use this table should refer to s.
NR 445.08 (2).
NR 445.07 Note
1For purposes of calculating non-exempt, potential to emit emissions for comparison with the threshold value in column (c), (d), (e) or (f) in the table the owner or operator of a source would:
NR 445.07 Note
-combine non-exempt, potential to emit emissions for each contaminant for all stacks within each of the 4 stack categories,
NR 445.07 Note
-compare each group of non-exempt, potential to emit emissions against the respective threshold found in column (c), (d), (e) or (f) in the table,
NR 445.07 Note
-if any group exceeds it's respective threshold in column (c), (d), (e) or (f), consider all non-exempt, potential to emit emissions from the source in determining compliance with the applicable or control requirement.
-
See PDF for table NR 445.07 Note
Note: The emission rates in columns (c) to (f) in Table C for any hazardous air contaminant may only be used if emissions are from an unobstructed vertical discharge point. Owners and operators of sources unable to use this table should refer to s.
NR 445.08(2).
NR 445.07 Note
1For purposes of calculating non-exempt, potential to emit emissions for comparison with the threshold value in column (c), (d), (e) or (f) in the table the owner or operator of a source would:
NR 445.07 Note
-combine non-exempt, potential to emit emissions for each contaminant for all stacks within each of the 4 stack categories,
NR 445.07 Note
-compare each group of non-exempt, potential to emit emissions against the respective threshold found in column (c), (d), (e) or (f) in the table
NR 445.07 Note
-if any group exceeds its respective threshold in column (c), (d), (e) or (f), consider all non-exempt, potential to emit emissions from the source in determining compliance with the applicable standard or control requirement
NR 445.07 History
History: CR 02-097: cr.
Register June 2004 No. 582, eff. 7-1-04;
CR 07-076: am. Tables A, B and C
Register July 2008 No. 631, eff. 8-1-08; correction in (1) (b) 2. made under s.
13.92 (4) (b) 6., Stats.,
Register August 2008 No. 632.
NR 445.08(1)
(1)
Compliance determination. Determination of compliance shall be done while the source is operating under the conditions required by permit or order resulting in the greatest emissions of the hazardous air contaminant, or absent a permit or order, by using the maximum theoretical emissions from the source.
NR 445.08(2)
(2) Compliance methods. The owner or operator of a source shall achieve compliance with the emission limitations and control requirements in
s. NR 445.07 (1),
(2) or
(3) for each hazardous air contaminant by doing one or any combination of the following. A source unable to meet the requirements of
s. NR 445.07 (6) (a) and
(b) may not use
par. (a) by itself or in combination with other methods to achieve compliance under this subsection.
NR 445.08(2)(a)
(a) Limiting non-exempt, potential to emit emissions from the source of each hazardous air contaminant to less than the applicable threshold in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07.
NR 445.08(2)(b)
(b) Limiting the quantity, concentration or duration of non-exempt, potential to emit emissions from the source of each hazardous air contaminant that has a standard expressed as an ambient air concentration in Table A or B of
s. NR 445.07 so that the ambient air concentration off the source property is less than the concentration allowed under column (g) of the table.
NR 445.08(2)(c)
(c) Limiting the quantity, concentration or duration of non-exempt, potential to emit emissions of each hazardous air contaminant with a control requirement in column (i) of Table A, B or C of
s. NR 445.07 having a unit risk factor established by either the EPA or the California air resources board, so as not to cause an ambient air concentration off the source property that results in an inhalation impact greater than 1 x 10
-6. The inhalation impact is determined by the following equation:
inhalation impact = (inhalation impact concentration annual average) x (unit risk factor)
where:
inhalation impact concentration annual average is the annual average concentration of a contaminant in micrograms per cubic meter (µg/m3)
unit risk factor for the contaminant is the unit risk factor value established by either EPA or the California air resources board and is expressed in reciprocal micrograms per cubic meter (µg/m3)-1
NR 445.08(2)(d)
(d) Altering the release height or dispersion characteristics of each hazardous air contaminant in Table A, B or C of
s. NR 445.07 such that the alteration results in the source's ability to meet
par. (a),
(b) or
(c) or
sub. (3) (a) 1. or
(b) 1.
NR 445.08(2)(e)
(e) Limiting the concentration of each hazardous air contaminant that has a standard expressed as an ambient air concentration in Table A or B of
s. NR 445.07 in the stack to less than the concentration allowed under column (g) of the table for that contaminant.
NR 445.08(2)(f)
(f) Limiting emissions of the hazardous air contaminant through application of the control requirement identified in column (i) of Table A, B or C of
s. NR 445.07. The control requirement shall be first applied to the emissions unit at the facility that emits the greatest actual annual amount of the hazardous air contaminant. If application of the control requirement to this emissions unit does not reduce facility emissions of the hazardous air contaminant to a level less than the rate listed in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07 for the contaminant, the control requirement shall be applied to other emissions units at the facility that emit progressively smaller amounts of the contaminant until emissions from the facility are below the emission rate listed in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07 for the contaminant or until the control requirement has been applied to all emissions units at the facility that emit at least 10% of the rate listed in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07 for the contaminant. If application of the control requirement to these emissions units does not result in the reduction of at least 50% of the potential emissions of the contaminant from the facility, the department may require application of the control requirement on a reasonable array of smaller emissions units that emit the contaminant.
NR 445.08 Note
Note: The term “control requirement" is used to represent the applicable level of emission reduction required for the hazardous air contaminant under review, in other words LAER or BACT. These reduction options include lower emitting processes or practices, material substitution, add-on controls, or any combination of the options.
NR 445.08(3)(a)(a) The owner or operator of a source may use the following alternative method of complying with any control requirements in
s. NR 445.07 (1) (c),
(2) or
(3) by doing both of the following:
NR 445.08(3)(a)1.
1. Limiting the quantity, concentration or duration of potential to emit emissions of one or more hazardous air contaminants with a control requirement in column (i) of Table A, B or C of
s. NR 445.07 having a unit risk factor established by either the EPA or the California air resources board so as not to cause an ambient air concentration off the source property that results in a cumulative inhalation impact from all of the contaminants greater than 1 x 10
-5. The cumulative inhalation impact is determined by the following equation:
cumulative inhalation impact =
where:
inhalation impact annual average is the annual average concentration in micrograms per cubic meter (µg/m3) of each contaminant
unit risk factor for the contaminant is the unit risk factor value established by either EPA or the California air resources board and is expressed in reciprocal micrograms per cubic meter (µg/m3)-1
i is a subscript denoting an individual hazardous air contaminant
n is the number of different hazardous air contaminants with a control requirement in column (i) of Table A, B or C of
s. NR 445.07 having a unit risk factor established by either the EPA or the California air resources board, including those exempt under
s. NR 445.07 (5), that are emitted at the facility.
NR 445.08(3)(a)2.
2. For each hazardous air contaminant with a control requirement in column (i) of Table A, B or C of
s. NR 445.07 not having a unit risk factor established by either the EPA or the California air resources board, limiting potential to emit emissions of the contaminant from the facility, including those exempt under
s. NR 445.07 (5), to less than the relevant threshold in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07.
NR 445.08(3)(b)
(b) The owner or operator of a source may use the following alternative method of complying with any control requirements in
s. NR 445.07 (4) by doing both of the following:
NR 445.08(3)(b)1.
1. Limiting the quantity, concentration or duration of potential to emit emissions of one or more hazardous air contaminants with a control requirement in column (i) of Table A, B or C of
s. NR 445.07 having a unit risk factor established by either the EPA or the California air resources board, including those exempt under
s. NR 445.07 (5), so as not to cause a cumulative multipathway impact off the source property from all of the contaminants greater than 1 x 10
-5.
NR 445.08(3)(b)2.
2. For each hazardous air contaminant with a control requirement in column (i) of Table A, B or C of
s. NR 445.07 not having a unit risk factor established by either the EPA or the California air resources board, limiting potential to emit emissions of the contaminant from the facility, including those exempt under
s. NR 445.07 (5), to less than the relevant threshold in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07.
NR 445.08 Note
Note: Unit risk factors for carcinogens can be obtained from the US EPA at the following website:
http://www.arb.ca.gov/toxics/healthval/healthval.htm. The US EPA unit risk factors should be consulted first. If no agreed upon unit risk factor is listed by the US EPA, then unit risk factors developed by the State of California should be consulted. The State of California's Air Resources Board and Office of Environmental and Health Hazard Assessment unit risk factors for carcinogens can be obtained from the following website:
http://www.arb.ca.gov/toxics/healthval/healthval.htm.
NR 445.08 Note
Note: Par. (c) was repealed by
2011 Wis. Act 122. On May 24, 2011, the Joint Committee for the Review of Administrative Rules (JCRAR) adopted a motion under s. 227.26 (2) (d), Stats., that suspended s. NR 445.08 (3) (c) in its entirety. Pursuant to s. 227.26 (2) (f), Stats., JCRAR introduced 2011 Assembly Bill 195 and 2011 Senate Bill 138, in support of the JCRAR suspension. 2011 Senate Bill 138 was enacted, effective March 22, 2012, resulting in in the repeal of the rules as suspended by the May 24, 2011 JCRAR motion, as provided in s. 227.26 (2) (i), Stats., and creating s. 285.28, Stats., as set forth below.
NR 445.08 Note
285.28 Agricultural waste; hazardous air contaminants. The department may not regulate the emission of hazardous air contaminants associated with agricultural waste except to the extent required by federal law.
NR 445.08 Note
Note: NR 445 was not developed with the purpose of regulating emissions of hazardous air contaminants associated with agricultural waste or byproducts. The department believes that using best management practices is the preferred approach to regulate and control emissions from these types of sources. Accordingly, the department intends to participate in the development of best management practices to regulate and control emissions from such sources by July 31, 2011.
NR 445.08(4)
(4) Enforceable limitations. Any limitation elected under this section shall be placed in a permit or general or special order.
NR 445.08(5)
(5) Determination of hazardous air contaminant emissions and concentrations. For the purpose of determining emissions and concentrations of hazardous air contaminants under this subchapter, the owner or operator of a source:
NR 445.08(5)(a)
(a) May rely on information on an approved material safety data sheet if the approved material safety data sheet lists a hazardous air contaminant listed in Table A, B or C of
s. NR 445.07 and for each hazardous air contaminant with a standard expressed as an ambient air concentration in column (g) of Table A, B or C constitutes 1% (10,000 parts per million) or more of the material, or for each hazardous air contaminant with a standard expressed as a control requirement in column (i) of Table A, B or C constitutes 0.1% (1,000 parts per million) or more of the material. If an approved material safety data sheet for a material does not list a hazardous air contaminant in Table A, B or C of
s. NR 445.07 at or above the amounts listed in this paragraph, the material will be presumed not to result in emissions of a hazardous air contaminant unless a hazardous air contaminant is formed in processing the material.
NR 445.08(5)(b)
(b) May rely upon mass balance or other use, consumption and analytical methodologies for calculating potential or theoretical emissions. However, the department may require that a stack test be conducted to affirm the accuracy of emission estimations.
NR 445.08(5)(c)
(c) Is not required to consider emissions resulting directly from naturally occurring constituents in windblown soil.
NR 445.08(5)(d)
(d) May rely on information generated by either the EPA screening
or refined dispersion model to demonstrate either of the following:
NR 445.08(5)(d)1.
1. Concentrations of each hazardous air contaminant will not exceed the ambient standard in column (g) of Table A or B of
s. NR 445.07.
NR 445.08 Note
Note: Contact the Permits and Stationary Source Modeling Section of the Bureau of Air Management, 608-266-7718 for additional information regarding procedures and protocols associated with US EPA screening and air dispersion models.
NR 445.08(6)
(6) Compliance deadlines, recordkeeping and reporting requirements. NR 445.08(6)(a)(a) Except as provided for agricultural waste in
par. (d), the owner or operator of a source subject to an emission limitation or control requirement in
s. NR 445.07 and constructed or last modified on or after July 1, 2004, shall achieve compliance upon startup of the source.
NR 445.08(6)(b)
(b) The owner or operator of a source constructed or last modified prior to July 1, 2004, with non-exempt, potential to emit emissions of a hazardous air contaminant less than or equal to the applicable threshold in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07 shall maintain records in accordance with
s. NR 439.04 (1) and
(2) starting no later than June 30, 2007.
NR 445.08(6)(c)
(c) Except as provided for agricultural waste in
par. (d), the owner or operator of a source constructed or last modified prior to July 1, 2004, with non-exempt, potential to emit emissions of a hazardous air contaminant greater than the applicable threshold in column (c), (d), (e) or (f) of Table A, B or C of
s. NR 445.07 or subject to
s. NR 445.07 (4) shall do all of the following:
NR 445.08(6)(c)2.
2. Achieve compliance with applicable emission limitations and control requirements in accordance with
subs. (1) and
(2) no later than June 30, 2007.
NR 445.08(6)(d)2.2. Emissions of hazardous air contaminants associated with agricultural waste are exempt from the requirements in this chapter.
NR 445.08 Note
Note: Subd. 2. is shown as affected by
2011 Wis. Act 122. Par. (d) 1. and 2. a. and b. were repealed by
2011 Wis. Act 122. On May 24, 2011, the Joint Committee for the Review of Administrative Rules (JCRAR) adopted a motion under s. 227.26 (2) (d), Stats., that suspended s. NR 445.08 (6) (d) 1. and 2. a. and b. in their entirety and (d) 2. (intro.) in part as shown below. Pursuant to s. 227.26 (2) (f), Stats., JCRAR introduced 2011 Assembly Bill 195 and 2011 Senate Bill 138, in support of the JCRAR suspension. 2011 Senate Bill 138 was enacted, effective March 22, 2012, resulting in in the repeal of the rules as suspended by the May 24, 2011 JCRAR motion, as provided in s. 227.26 (2) (i), Stats., and creating s. 285.28, Stats., as set forth below.
NR 445.08 Note
NR 445.08 (6) (d) 2. Emissions of hazardous air contaminants associated with agricultural waste from a source constructed or last modified prior to July 31, 2011, are exempt from the requirements in this chapter until July 31, 2011. Subsequently, the owner or operator of the source shall do both of the following if non-exempt, potential to emit emissions of a hazardous air contaminant from agricultural waste are greater than an applicable threshold in column (c), (d), (e) or (f) of Table A of s. NR 445.07:
NR 445.08 Note
285.28 Agricultural waste; hazardous air contaminants. The department may not regulate the emission of hazardous air contaminants associated with agricultural waste except to the extent required by federal law.
NR 445.08(7)
(7) Compliance demonstration and notification requirements. The owner or operator of any source required to achieve compliance in accordance with the schedule in
sub. (6) (c) shall demonstrate compliance by doing the following as applicable:
NR 445.08(7)(a)
(a) Submit the information required under
sub. (6) (c) 1. on the application form required for an operation permit, an amendment to an application, renewal of the operation permit, or for a significant revision under
s. NR 407.13, as applicable.
NR 445.08(7)(b)
(b) For all sources, submit all of the following information to the department:
NR 445.08(7)(b)1.
1. The hazardous air contaminants in Table A, B and C of
s. NR 445.07 the facility is capable of emitting in an amount greater than the threshold value listed for the contaminant in the applicable table.
NR 445.08(7)(b)2.
2. The emission limitation applicable to each hazardous air contaminant identified under
subd. 1.
NR 445.08(7)(b)3.
3. The method or combination of methods used for achieving compliance under
sub. (2) or
(3) with the applicable standard for each hazardous air contaminant.
NR 445.08(7)(b)4.
4. A description of the records that will be kept on site to verify continuous compliance for each hazardous air contaminant with its applicable standard.
NR 445.08(7)(b)5.
5. A signed and dated statement by the responsible official stating that the information is accurate to the best of his or her knowledge and belief, and that all of the requirements of this subchapter have been met.
NR 445.08 Note
Note: Application forms for par. (a) may be obtained from, and submitted to, the regional offices and service centers of the department or:
Wisconsin Department of Natural Resources
Bureau of Air Management
PO Box 7921
Madison WI 53707-7921
Attention: Operation Permits.
