Michigan Administrative Code
Department - Environmental Quality
Air Quality Division
Part 2 - AIR USE APPROVAL
Section R. 336.1230 - Lists for toxic air contaminants health-based screening levels, emission rate reviews, and T-BACT determinations
Universal Citation: MI Admin Code R. 336.1230
Current through Vol. 24-04, March 15, 2024
Rule 230.
(1) The department shall maintain the following information and make it available on the departments website:
(a) Toxic air
contaminant names and chemical abstract service numbers and the basis for
determining each of the following screening levels:
(i) Initial threshold screening levels
reviewed by the department.
(ii)
Initial and secondary risk-based screening levels reviewed by the
department.
(iii) For paragraphs
(i) and (ii) of this subdivision, the date of the screening level derivation,
the algorithm used, the uncertainty factors used, a brief description of the
best available information for the screening level, and citations for the key
studies and information sources.
(b) Ambient concentrations for toxic air
contaminants reviewed by the department under
R 336.1226(d) and
R 336.1228, the applicable chemical
abstract service number, and the basis for any alternative concentration
approved under these rules.
(c)
T-BACT determinations reviewed by the department.
(2) The department shall make available on the departments website the initial established health-based screening levels for toxic air contaminants as follows:
(a)
Within 60 days of the effective date of this rule, the department shall provide
notice of initial established health-based screening levels for toxic air
contaminants and accept comments on the screening levels for a period of 60
days.
(b) Within 180 days following
the receipt of comments and full consideration thereof, the department shall
finalize and publish the health-based screening levels together with a response
to substantive comments received.
(c) The initial established health-based
screening levels shall remain applicable until the public review process
described in this subrule is completed.
(3) After the health-based screening levels are finalized under subrule (2) of this rule, the department may establish additions or changes to the health-based screening levels as follows:
(a) Within 6 months of establishing any
additions or changes to the screening levels, the department shall make
available on the departments website any established additions or changes to
the screening levels and shall provide public notice of the action and accept
comments for a period of 30 days.
(b) Within 60 days following the receipt of
comments and full consideration thereof, the department shall publish a final
decision and a response to substantive comments received.
(c) The additions or changes to the screening
levels established by subrule (3) of this rule shall remain applicable until
the public review process described in this subrule is completed.
Disclaimer: These regulations may not be the most recent version. Michigan 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.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.