Current through August 26, 2024
(1) GENERAL. The owner or operator shall
comply with the hydrogen chloride (HCl) and chlorine (Cl2) controls provided by
sub. (2), (3) or (5).
(2) SCREENING
LIMITS.
(a)
Tier I feed rate
screening limits. Feed rate screening limits are specified for total
chlorine in ch. NR 666 Appendix II as a function of terrain-adjusted effective
stack height and terrain and land use in the vicinity of the facility. The feed
rate of total chlorine and chloride, both organic and inorganic, in all feed
streams, including hazardous waste, fuels and industrial furnace feed stocks
may not exceed the levels specified.
(b)
Tier II emission rate screening
limits. Emission rate screening limits for HCl and Cl2 are specified
in ch. NR 666 Appendix III as a function of terrain-adjusted effective stack
height and terrain and land use in the vicinity of the facility. The stack
emission rates of HCl and Cl2 may not exceed the levels specified.
(c)
Definitions and
limitations. The definitions and limitations provided by s.
NR 666.106(2) for the following terms
also apply to the screening limits provided by this subsection:
terrain-adjusted effective stack height, good engineering practice stack
height, terrain type, land use and criteria for facilities not eligible to use
the screening limits.
(d)
Multiple stacks. Owners and operators of facilities with more
than one on-site stack from a boiler, industrial furnace, incinerator or other
thermal treatment unit subject to controls on HCl or Cl2 emissions under an
operating license or interim license shall comply with the Tier I and Tier II
screening limits for those stacks assuming all hazardous waste is fed into the
device with the worst-case stack based on dispersion characteristics.
1. The worst-case stack is determined by
procedures provided in s.
NR 666.106(2) (f).
2. Under Tier I, the total feed rate of
chlorine and chloride to all subject devices may not exceed the screening limit
for the worst-case stack.
3. Under
Tier II, the total emissions of HCl and Cl2 from all subject stacks may not
exceed the screening limit for the worst-case stack.
(3) TIER III SITE-SPECIFIC RISK
ASSESSMENTS.
(a)
General.
Conformance with the Tier III controls shall be demonstrated by emissions
testing to determine the emission rate for HCl and Cl2, air dispersion modeling
to predict the maximum annual average off-site ground level concentration for
each compound, and a demonstration that acceptable ambient levels are not
exceeded.
(b)
Acceptable
ambient levels. Chapter. NR 666 Appendix IV lists the reference air
concentrations (RACs) for HCl (7 micrograms per cubic meter) and Cl2 (0.4
micrograms per cubic meter).
(c)
Multiple stacks. Owners and operators of facilities with more
than one on-site stack from a boiler, industrial furnace, incinerator or other
thermal treatment unit subject to controls on HCl or Cl2 emissions under an
operating license or interim license shall conduct emissions testing and
dispersion modeling to demonstrate that the aggregate emissions from all such
on-site stacks do not result in an exceedance of the acceptable ambient levels
for HCl and Cl2.
(4)
AVERAGING PERIODS. The HCl and Cl2 controls are implemented by limiting the
feed rate of total chlorine and chloride in all feedstreams, including
hazardous waste, fuels and industrial furnace feed stocks. Under Tier I, the
feed rate of total chloride and chlorine is limited to the Tier I screening
limits. Under Tier II and Tier III, the feed rate of total chloride and
chlorine is limited to the feed rates during the trial burn (for new facilities
or an interim license facility applying for a license) or the compliance test
(for interim license facilities). The feed rate limits are based on either of
the following:
(a) An hourly rolling average
as defined in s.
NR 666.102(5)
(f).
(b) An instantaneous basis not to be exceeded
at any time.
(5)
ADJUSTED TIER I FEED RATE SCREENING LIMITS. The owner or operator may adjust
the feed rate screening limit provided by ch. NR 666 Appendix II to account for
site-specific dispersion modeling. Under this approach, the adjusted feed rate
screening limit is determined by back-calculating from the acceptable ambient
level for Cl2 provided by ch. NR 666 Appendix IV using dispersion modeling to
determine the maximum allowable emission rate. This emission rate becomes the
adjusted Tier I feed rate screening limit.
(6) EMISSIONS TESTING. Emissions testing for
HCl and Cl2 shall be conducted using the procedures described in Methods 0050
or 0051, EPA SW-846, as incorporated by reference in s.
NR 660.11.
(7) DISPERSION MODELING. Dispersion modeling
shall be conducted according to s.
NR 666.106(8).
(8) ENFORCEMENT. For the purposes of license
enforcement, compliance with the operating requirements specified in the
license (under s.
NR 666.102) shall be regarded as compliance with this
section. However, evidence that compliance with those license conditions is
insufficient to ensure compliance with this section may be information
justifying modification or revocation and re-issuance of a license under s.
NR 670.041.
