Regulatory Text:
Oklahoma Administrative Code, Title 252, Department of Environmental Quality
OK Chapter 4 (OAC 252:4). Rules of Practice and Procedure

OK Chapter 4, Subchapter 7. Environmental Permit Process

PART 3. AIR QUALITY DIVISION TIERS AND TIME LINES
As approved by EPA April 10, 2020 (85 FR 20178) SIP effective May 11, 2020 (OKd29),
Regulations.gov docket EPA-R06-OAR-2018-0208 [OK029].

Sections:
252:4-7-31.  Air quality time lines, OKd21
252:4-7-32.  Air quality applications - Tier I, OKd29
252:4-7-33.  Air quality applications - Tier II, OKd29
252:4-7-34.  Air quality applications - Tier III, OKd07

252:4-7-31.  Air quality time lines
As reapproved by EPA with Explanation May 15, 2017 (82 FR 22281) SIP effective June 14, 2017 (OKd21),
Adopted in the Oklahoma Register June 1, 2001 (18 Ok Reg 1922) effective June 11, 2001. 
Submitted to EPA February 14, 2002, Regulations.gov document EPA-R06-OAR-2006-0389-0005 [OK005.05] and Regulations.gov document EPA-R06-OAR-2007-0989-0007 [OK007.07].
Approved by EPA November 26, 2010 (75 FR 72695) SIP effective December 27, 2010 (OKd07),
Regulations.gov document EPA-R06-OAR-2007-0314-0020 [OK006.20].
     Reapproved by EPA with Explanation May 15, 2017 (82 FR 22281) SIP effective June 14, 2017 (OKd21),
Regulations.gov docket EPA-R06-OAR-2007-0989-0020 [OK007].
Explanation:   
     Applicable to minor NSR permitting under OAC 252:100-7. 
     Approved for major NSR permitting 11/26/2010, 75 FR 72695."

252:4-7-31  Air quality time lines
     The following air quality permits and authorizations shall be technically reviewed and issued or denied within the time frames specified below.
          (1)  Construction permits:
               (A)  PSD and Part 70 Sources - 365 days.
               (B)  Minor Facilities - 180 days.
          (2)  Operating permits:
               (A)  Part 70 Sources - 540 days.
               (B)  Minor Facilities - 365 days.
          (3)  Relocation permits - 30 days.
** end 252:4-7-31 SIP effective  June 14, 2017 (OKd21)**

252:4-7-32.  Air quality applications - Tier I
Approved by EPA April 10, 2020 (85 FR 20178) SIP effective May 11, 2020 (OKd29).
As adopted in the Oklahoma Register May 15, 2003 (20 OkReg 1117) effective June 1, 2013.
Submitted to EPA May 16, 2018,
Regulations.gov document EPA-R06-OAR-2018-0208-0005 [OK029.05], Adobe file page 1242.
Approved by EPA April 10, 2020 (85 FR 20178) SIP effective May 11, 2020 (OKd29),
Regulations.gov docket EPA-R06-OAR-2018-0208 [OK029]
Explanation:   
     Applicable to minor NSR permitting under OAC 252:100–7.
     The SIP does NOT include (a), (b),or (c)(1).

252:4-7-32. Air quality applications- Tier I
     (a) NOT IN SIP
     (b) NOT IN SIP
     (c) Other authorizations. The following air quality
authorizations require Tier I applications.
          (1)  NOT IN SIP
          (2) Burn approvals.
          (3) Administrative amendments of all air quality permits
and other authorizations.
***end 252:4–7–32 SIP effective May 11, 2020 (OKd29)***b19***

252:4-7-33.   Air quality applications - Tier II
Approved by EPA April 10, 2020 (85 FR 20178) SIP effective May 11, 2020 (OKd29).
As adopted in the Oklahoma Register May 15, 2003 (20 OkReg 1117) effective June 1, 2013. 
Submitted to EPA May 16, 2018,
Regulations.gov document EPA-R06-OAR-2018-0208-0005 [OK029.05], Adobe file page 1242.
Approved by EPA April 10, 2020 (85 FR 20178) SIP effective May 11, 2020 (OKd29),
Regulations.gov docket EPA-R06-OAR-2018-0208 [OK029]
Explanation:  The SIP does NOT include (c)(4).

252:4-7-33. Air quality applications- Tier II
     (a) Minor facility permit actions. Any minor facility seeking
a permit for a modification that when completed would turn
it into a Part 70 source is required to apply under subsection (b)
of this section.
     (b) Part 70 source permits. The following air quality
authorizations for Part 70 sources require Tier II applications.
          (1) New permits.
               (A) New construction permit for a new Part 70
source not classified under Tier III.
               (B) New construction permit for an existing 
Part 70 source for any change considered significant under
252:100-8-7.2(bX2) and which is not classified under Tier III.
               (C) New operating permit for a Part 70 source that
did not have an underlying construction permit processed
under Tier II or III, and 252:100-8-8.
               (D) New operating permit with one or more 
conditions that differ from the underlying Tier II or III
construction permit's operating conditions in a way
considered significant under 252:100-8-7.2(b){2).
               (E) New acid rain permit that is independent of a
Part 70 permit application.
               (F) New temporary source permit under 252:100-8-6.2.
          (2) Modifications of permits.
               (A) Significant modification, as described in
252:100-8-7.2(b)(2), of an operating permit that is not
based on an underlying construction permit processed
under Tier II or III, and 252:100-8-8.
               (B) Modification of an operating permit when
the conditions proposed for modification differ
from the underlying construction permit's operating
conditions in a way considered significant under
252:100-8-7.2(bX2).
               (C) A construction permit modification considered
significant under 252:100-8-7.2(b)(2) and which is
not classified under Tier III.
          (3) Renewals. Renewals of operating permits.
     (c) Other authorizations. The following air quality
authorizations require Tier II applications.
          (1) New, modified and renewed general operating
permits.
          (2) Individual authorizations under any general
operating permit for which a schedule of compliance is 
required by 252:100-8-5(c)(8)(B)i).
          (3) Plant-wide emission plan approval under
252:100-37-25(b) or 252:100-39-46(j).
          (4)  NOT IN SIP
***end 252:4–7–33 SIP effective May 11, 2020 (OKd29)***b18***

252:4-7-34.  Air quality applications - Tier III
Approved by EPA November 26, 2010 (75 FR 72695) SIP effective December 27, 2010 (OKd07),
As adopted in the Oklahoma Register June 1, 2001 (18 Ok Reg 1922) effective June 11, 2001. 
Submitted to EPA February 14, 2002, Regulations.gov document EPA-R06-OAR-2006-0389-0005 [OK005.05] and Regulations.gov document EPA-R06-OAR-2007-0989-0007 [OK007.07].
Approved by EPA November 26, 2010 (75 FR 72695) SIP effective December 27, 2010 (OKd07),
Regulations.gov docket EPA-R06-OAR-2007-0314 [OK006].
Explanation:  No explanation.

252:4-7-34. Air quality applications—Tier III
     (a)  New major stationary sources.  A construction permit for any new major stationary source listed in this subsection requires a Tier III application.  For purposes of this section, "Major stationary source" means:
          (1)  Any of the following sources of air pollutants which emits, or has the potential to emit, 100 tons per year or more of any pollutant subject to regulation:
               (A)  carbon black plants (furnace process),
               (B)  charcoal production plants,
               (C)  chemical process plants,
               (D)  coal cleaning plants (with thermal dryers),
               (E)  coke oven batteries,
               (F)  fossil-fuel boilers (or combustion thereof), totaling more than 250 million BTU per hour heat input,
               (G)  fossil fuel-fired steam electric plants of more than 250 million BTU per hour heat input,
               (H)  fuel conversion plants,
               (I)  glass fiber processing plants,
               (J)  hydrofluoric, sulfuric or nitric acid plants,
               (K)  iron and steel mill plants,
               (L)  kraft pulp mills,
               (M)  lime plants,
               (N)  incinerators, except where used exclusively as air pollution control devices,
               (O)  petroleum refineries,
               (P)  petroleum storage and transfer units with a total storage capacity exceeding 300,000 barrels,
               (Q)  phosphate rock processing plant,
               (R)  portland cement plants,
               (S)  primary aluminum ore reduction plants,
               (T)  primary copper smelters,
               (U)  primary lead smelters,
               (V)  primary zinc smelters,
               (W)  secondary metal production plants,
               (X)  sintering plants,
               (Y)  sulfur recovery plants, or
               (Z)  taconite ore processing plants, and
          (2)  Any other source not specified in paragraph (1) of this definition which emits, or has the potential to emit, 250 tons per year or more of any pollutant subject to regulation.
     (b)  Existing incinerators.  An application for any change in emissions or potential to emit, or any change in any permit condition, that would have caused an incinerator to be defined as a major stationary source when originally permitted shall require a Tier III application.
     (c)  Potential to emit.  For purposes of this section, "potential to emit" means emissions resulting from the application of all enforceable permit limitations as defined in OAC 252:100-1-3.
** end 252:4-7-34 SIP effective December 27, 2010 (OKd07)**

** end ok oac 252:4 subchapter 7 part 3, SIP effective  May 11, 2020 (OKd29) **d44**y76**b19**