Section 18 AAC 50.220 - Enforceable test methods(a) The department may require an owner, operator, or permittee to conduct air pollutant emission tests to determine compliance with AS 46.14 and this chapter. If an applicable emission standard, permit provision, or other requirement specifies a time period within which testing must be completed, the owner, operator, or permittee shall conduct the testing within the specified period regardless of whether the department explicitly calls for testing under this subsection.(b) Unless otherwise specified by an applicable requirement or test method, an air pollutant emission test must be performed (1) at a point or points that characterize the actual discharge into the ambient air; and(2) at the maximum rated burning or operating capacity of the emissions unit or another rate determined by the department to characterize the actual discharge into the ambient air.(c) Reference test methods to be used by the owner, operator, or permittee for an applicable requirement of AS 46.14 or this chapter are as follows: (1) except as provided in (2) of this subsection,(A) source testing for compliance with requirements adopted by reference in 18 AAC 50.040(a) must be conducted in accordance with the source test methods and procedures specified in 40 C.F.R. Part 60, adopted by reference in 18 AAC 50.040(a);(B) source testing for compliance with requirements adopted by reference in 18 AAC 50.040(b) must be conducted in accordance with the source test methods and procedures specified in 40 C.F.R. Part 61, adopted by reference in 18 AAC 50.040(b);(C) source testing for compliance with requirements adopted by reference in 18 AAC 50.040(c) must be conducted in accordance with the source test methods and procedures specified in 40 C.F.R. Part 63, adopted by reference in 18 AAC 50.040(c);(D) source testing for reduction in visibility through the exhaust effluent must follow the procedures set out in Vol. 3, sec. IV-3, Appendix IV-3, "Alaska Air Quality Visible Emissions Evaluation Procedures," of the state air quality control plan, adopted by reference in 18 AAC 50.030;(E) source testing for emissions of total particulate matter, sulfur compounds, nitrogen compounds, carbon monoxide, lead, volatile organic compounds, fluorides, sulfuric acid mist, municipal waste combustor organics, metals, and acid gases must follow the procedures specified in Appendix A to 40 C.F.R. Part 60, adopted by reference in 18 AAC 50.035(b); and(F) source testing for emissions of PM-10 and PM-2.5 must follow the procedures set out in Appendix M to 40 C.F.R. Part 51, adopted by reference in 18 AAC 50.035;(2) emissions of any air contaminant may be determined using an alternative method approved by the department in accordance with Method 301 in Appendix A to 40 C.F.R. Part 63, adopted by reference in 18 AAC 50.035(b); and(3) standard exhaust gas volumes must include only the volume of gases formed from the theoretical combustion of the fuel, plus the excess air volume normal for the specific emissions unit type, corrected to standard conditions.(d) In deciding whether to require a test under (a) of this section, the department will consider (1) the compliance status of the emissions unit and the margin of compliance with each applicable requirement as demonstrated by prior compliance tests or other reasonably accurate data or calculations;(2) the potential variability of emissions from the stationary source; and(3) the date and results of prior compliance tests, if any.(e) The owner, operator, or permittee shall submit the results of testing conducted under this section as required by Vol. 3, sec. IV-3, Appendix IV-3, of the state air quality control plan, adopted by reference in 18 AAC 50.030.(f) In source testing for compliance with the particulate matter standards in 18 AAC 50.050 or 18 AAC 50.055, the three-hour average is determined using the average of three one-hour test runs. The source test must account for those emissions caused by soot blowing, grate cleaning, or other routine maintenance activities by ensuring that at least one test run includes the emissions caused by the routine maintenance activity and is conducted under conditions that lead to representative emissions from that activity. The emissions must be quantified using the following equation: CLICK TO VIEW FORMULA
Where:
E = the total particulate emissions of the source in grains per dry standard cubic foot (gr/dscf).
EM = the particulate emissions in gr/dscf measured during the test that included the routine maintenance activity.
ENM = the arithmetic average of particulate emissions in gr/dscf measured by the test runs that did not include routine maintenance activity.
A = the period of routine maintenance activity occurring during the test run that included routine maintenance activity, expressed to the nearest hundredth of an hour.
B = the total period of the test run, less A.
R = the maximum period of source operation per 24 hours, expressed to the nearest hundredth of an hour.
S = the maximum period of routine maintenance activity per 24 hours, expressed to the nearest hundredth of an hour.
Eff. 1/18/97, Register 141; am 10/1/2004, Register 171; am 9/17/2011, Register 199; am 9/14/2012, Register 203; am 4/17/2015, Register 214, July 2015; am 9/15/2018,Register 227, October 2018Authority:AS 46.03.020
AS 46.14.010
AS 46.14.020
AS 46.14.030
AS 46.14.140
Sec. 30, ch. 74, SLA 1993