1 

TECHNICAL SUPPORT DOCUMENT (TSD) 

EPA PROPOSED RULE ACTION 

COLORADO AIR POLLUTANT EMISSION NOTICES (APEN) SIP REVISIONS 

SUBMITTED BY THE STATE OF COLORADO 

On 

September 16, 1997; June 20, 2003; July 11, 2005; August 8, 2006; August 1, 2007 

Docket No. EPA-R08-OAR-2007-0649 

Prepared by: 

Crystal Freeman, Air Program 

U.S. Environmental Protection Agency, Region 8 

1595 Wynkoop St., Denver, CO 80202 

(303) 312-6436 

January 24, 2011
2 

This Technical Support Document (TSD) examines the Air Pollutant Emission Notice (APEN) revision

air quality provisions in Regulation No.3, Part A, sections II.A. through II.D., submitted to EPA between 1997 anperiod the State of Colorado submitted APEN SIP revisions on September 16, 1997, June 20, 2003, July 11, 200

August 1, 2007. This document lists all the provisions in air quality Regulation No. 3, Part A, sections II.A. thro

as they appear in the August 1, 2007 submittal. From left to right, the columns in the TSD Table specify the foll

number in the August 1, 2007 version of Regulation No. 3; (2) 1997 EPA-approved provisions by their provision 

Regulation No. 3, Part A, section II.A through II.D.; (3) provisions’ title or summary description, followed by th

substantively revised language (if any) of the 2007 version with respect to its 1997 EPA-approved version; (4) Eproposed approval, disapproval, or no action; (5) EPA’s evaluation of the nature of the changes (if any). For brechanges that are clerical in nature, such as style, grammar, or format changes that do not affect the substance of t

detailed in this TSD Table. Rather, their occurrence is referred to under the general “clerical changes” note in th

It is to be noted that the TSD Table lists also six provisions (exempting sources from APEN requiremen

the State of Colorado in 2008, and submitted to EPA in June 2009. EPA is not proposing to act on these provisioRegister action because EPA has already proposed approval of their repeal in a separate action published July 21
3 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

Part A, Section II.A. 

A-II.A. A-II.A. APENs for New, Modified, and Existing Sources 

Except as specifically exempted in Section II.D., no person shall allow emission of air pollutants from, or construction, modification or alteration of, any facility, process, and or

activity which constitutes a stationary source, ...

Approval The additio

required to covered by Additional the substan

Part A, Section II.B. 

A-II.B. A-II.B. General No Action No changeA-II.B.1. A-II.B.1. Emission Estimate Approval Clerical chA-II.B.1.a. A-II.B.1.a. Emission Estimate: alternative method No Action No changeA-II.B.1.b. A-II.B.1.b. Emission Estimate: alternative method 

...If none of the above methods are available or applicable to the source, an appropriate method will be determined on a 

case by case basis by the Division, taking into account the provisions of Section II.E.2. of this Regulation No. 3, Part A.

Section II.C.2. of this Part A ... 

Approval Change 1 – 

obvious cleState, with to “Section reference ssignificant relate to th
4 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

...Applications for Construction Permits must include an APEN.

emission esignificant the greater acceptable Change 2 – unchanged moved to S

A-II.B.2. A-II.B.2. Air Pollutant Emission Notice Term 

APEN Air Pollutant Emission Notice Term 

Approval Clerical ch

A-II.B.3. A-II.B.3. APEN Applicability 

Source Definition APEN Applicability

Approval Title chang

content of tsubstantive

A-II.B.3.a. A-II.B.3.a. Criteria Pollutants 

For criteria pollutants, Air Pollutant Emission Notices are required for: each individual emission point in a nonattainment area with uncontrolled actual emissions of one ton per year or more of any individual criteria pollutant 

(pollutants are not summed) for which the area is 

nonattainment; each individual emission point in an 

attainment or attainment/maintenance area with uncontrolled 

Approval The revisio

that the one nonattainmpollutants fnonattainmof this revinot make ththe ambien
5 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

actual emissions of two tons per year or more of any individual criteria pollutant (pollutants are not summed); each individual emission point with uncontrolled actual emissions of lead greater than one hundred pounds per year, regardless of where the source is located. 

A-II.B.3.b. A-II.B.3.b. Non-criteria Reportable Pollutants No Action EPA’s inte

pollutant psubmitted trequiremenNAAQS. 

A-II.B.4. A-II.B.4. Source Grouping No Action No changeA-II.B.4.a. A-II.B.4.a. Source Grouping: classification codes Approval Clerical chA-II.B.4.b. A-II.B.4.b. Source Grouping: sharing similar location within a facility Approval Clerical chA-II.B.4.c. A-II.B.4.c. Source Grouping: prohibition to group sources regulated 

under NSPS & with sources not regulated under NSPS 

Approval Clerical ch

A-II.B.4.d. A-II.B.4.d. Source Grouping: no requirement for individual sources to 

monitor emissions through use of continuous emission monitors. 

Approval Clerical ch

A-II.B.4.e. A-II.B.4.e. Source Grouping: fuel usage, production and consumption Approval Clerical ch
6 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

levels. 

A-II.B.4.f. A-II.B.4.f. Source Grouping: no individual source has previously been 

issued individual permit. 

Approval Clerical ch

N/A Moved to A-I.B.43 

A-II.B.5. Source Grouping: uncontrolled Actual Emissions Approval Clerical ch

The move does not imand exempother Color

A-II.B.5. A-II.B.6. Source Grouping: calendar year No Action No changeA-II.B.6. A-II.B.7. Source Grouping: emission fee calendar No Action No changeN/A A-II.B.8. Source Grouping: effective date for sources not required to 

file APEN APENs required under past versions of this regulation which 

are no longer required are rescinded as of the effective date of this regulation

Approval This provis

removal dosources req

N/A Moved to A-I.B.16 

A-II.B.9. Source Grouping: identification of criteria pollutants 

Those pollutants for which the U.S. EPA has established 

Approval The revisio

pollutants aestablished 
7 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

national ambient air quality standards, including: carbon 

monoxide, nitrogen dioxide (direct emissions and as a 

precursor to ozone), sulfur dioxide, PM10, PM2.5, total 

suspended particulate matter, ozone, volatile organic compounds (as a precursor to ozone), and lead. 

identifies Ncompounds ozone. EPrevision beof criteria pAPEN appfederal defthe AQCC I.B.16. EPthis renumbthe applicanotes that sSection I.Bof II.B.9 to any other pnot impact 

N/A A-II.B.10. Source Grouping: filing dates for existing sources 

A-II.B.10. For existing sources, APENs for non-criteria 

reportable pollutants listed in Appendix B shall be submitted to the Division no later than December 31, 1993. APENs for non-criteria reportable pollutants listed in Appendix C shall be submitted no later than December 31, 1994.

Approval EPA’s inte

pollutants (to us are noor maintenremoval of with what s
8 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

Part A, Section II.C. 

A-II.C. A-II.C. Revised Air Pollutant Emission Notices Approval Clerical chA-II.C.1. A-II.C.1. APEN – filing triggering events Approval Clerical chA-II.C.1.a. A-II.C.1.a. List of APEN – filing triggering events 

...as defined below in Paragraph 2...(as defined in Section 

II.C.2.) ... 

Approval Clerical ch

A-II.C.1.b. through A-II.C.1.g. 

A-II.C.1.b. through A-II.C.1.g. 

List of APEN – filing triggering events No Action No change

A-II.C.1.h. A-II.C.1.h. List of APEN – filing triggering events 

...considered to be a major stationary source as defined in 

Section I.B.58. of this regulation,...in Section II.A.25. of Part 

D of this Regulation Number 3.

Approval The revisio

reference to stationary sreference sgives the dBaseline Ddefines “Mhas discussconcurs tha“Section IIcorrect this 
9 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

submittal to reference ccontext, EPrevision. 

A-II.C.2. A-II.C.2. Significant change Approval Clerical chA-II.C.2.a. A-II.C.2.a. Significant change for non-criteria pollutants. No Action No changeA-II.C.2.b. & A-II.C.2.b.(i). 

A-II.C.2.b. & A-II.C.2.b.(i). 

Significant change for criteria pollutants: sources emitting 

<100 tpy 

Approval Clerical ch

A-II.C.2.b.(ii). A-II.C.2.b.(ii). Significant change for criteria pollutants: VOCs and NOx 

sources. For volatile organic compound and nitrogen oxides sources in 

ozone nonattainment areas emitting less than one hundred tons of volatile organic compound per year. 

Approval The additio

EPA’s reguits precurso

A-II.C.2.b.(iii). & A-II.C.2.b.(iv). 

A-II.C.2.b.(iii). & A-II.C.2.b.(iv). 

Significant change for criteria pollutants: sources emitting 

≥100 tpy; and lead sources. 

Approval Clerical ch

A-II.C.3., A-II.C.3.a., & A-II.C.3.b. 

A-II.C.3., A-II.C.3.a., & A-II.C.3.b. 

Timeframe for Revised Air Pollutant Emission Notice

submittals 

Approval Clerical ch
10 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

A-II.C.3.c. A-II.C.3.c. Timeframe for Revised Air Pollutant Emission Notice 

submittals: control equipment. ...a change in annual actual emission rates...

Approval The text ad

as to the timemission ra

A-II.C.3.d. A-II.C.3.d. Timeframe for Revised Air Pollutant Emission Notice 

submittals Air Pollutant Emission Notices for changes in control 

equipment must be submitted before the change occurs; except for control equipment at condensate storage tanks 

located at oil and gas exploration and production facilities subject to the requirements in Regulation Number 7, Section XII. For this control equipment, a revised APEN shall be filed once per year, as specified in Section II.C.3.c. of Part A, if any control equipment is added or if control equipment is relocated or removed.

Approval The revised 

APENs are condensate and gas expthe revision from reporrelieve them requiremendoes not imambient air proposing t

Part A, Section II.D. 

A-II.D. A-II.D. Exemptions from APEN Air Pollutant Emission Notice 

Requirements

Approval Clerical ch

A-II.D.1. A-II.D.4.a. Notwithstanding the exemptions contained in Section II.D.1., 

Air Pollutant Emission Notices must be filed for all emission 

units specifically identified in the applicability section of any 

Approval The revised 

the referenRegulation
11 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

subpart of Part A of Regulation No. 6 (New Source 

Performance Standards) and/or Regulation No. 8 (Hazardous 

Air Pollutants), Parts A, C, D, and E. However, Air Pollutant Emission Notices need not be filed for wet screening 

operations subject to Subpart OOO of the New Sources 

Performance Standards if the exemption in section II.D.1.cccc. is applicable. Stationary sources having emission units that are exempt from 

the requirement to file an Air Pollutant Emission Notice must nevertheless comply with all requirements that are otherwise applicable specifically to the exempted emission units, including, but not limited to: Title V, Prevention of Significant 

Deterioration, nonattainment New Source Review, opacity limitations, odor limitations, particulate matter limitations and volatile organic compound controls. An applicant may not omit any information regarding APEN 

exempt emission units in any permit application if such information is needed to determine the applicability of Title V 

(Part C of this Regulation No. 3), Prevention of Significant Deterioration (Section IV.D.3., Part B of this Regulation No. 3), or nonattainment New Source Review (Section IV.D.2.a., Part B of this Regulation No. 3). The following sources are exempt from the requirement to file 

requiremenemissions o
12 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

Air Pollutant Emission Notices APENs because by 

themselves, or cumulatively as a category, they are deemed to have a negligible impact on air quality. 

N/A A-II.D.4.b. Notwithstanding paragraph 4.a., above, sources which are 

subject solely to the following requirements, or to a combination of such requirements, are allowed to take exemptions.

(i) Sources which are subject to the general opacity 

standard contained in Regulation No. 1.

(ii) Sources which are subject to the general fuel 

burning, manufacturing process, and fugitive particulate standards contained in Regulation No. 1 and Part B of Regulation No. 6.

(iii) Sources which are not subject to a specific RACT 

requirement of Regulation No. 7.

(iv) Sources subject to Regulation No. 2, as set forth in 

Section II.D.1.rr. of this Regulation No. 3, Part A.

APEN exemptions taken under this paragraph do not 

affect the applicability of the regulations to the source.

Approval Removal o

more stringthis exemp

A-II.D.1.a. A-II.D.1.a. Individual emission points in nonattainment areas having 

uncontrolled actual emissions of any criteria pollutant of less 

than one ton per year, and individual emission points in 

attainment or attainment/maintenance areas having 

uncontrolled actual emissions of any criteria pollutant of less 

Approval Revision cl

exemption stringency quality. 
13 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

than two tons per year, and each individual emission point with uncontrolled actual emissions of lead less than one hundred pounds per year, regardless of where the sources is located. 

A-II.D.1.b. through A-II.D.1.e. 

A-II.D.1.b. through A-II.D.1.e. 

Individual emission points of non-criteria reportable pollutants through Equipment for non-commercial cooking for food. 

No Action No change

A-II.D.1.f. A-II.D.1.f. Safety flares Flares used to indicate danger to the public Approval Revised lanA-II.D.1.g. A-II.D.1.g. Agricultural operations normally conducted at the farm or 

ranch including, for example, cultivating and harvesting. This shall not include grain elevator operations, feed mill operations or other post harvesting activities normally not conducted on the farm or ranch. 

Agricultural operations such as farming, cultivating, 

harvesting, seasonal crop drying, grain handling operations that are below New Source Performance Standards de minimis levels (including milling and grain elevator operations), and animal feeding operations that are not housed commercial swine feeding facilities as defined in Regulation No. 2, Part B. This exemption does not apply to an agricultural operation that: (1) is a major source (as defined in section I.B.23. of this Part); (2) meets or exceeds the storage capacity thresholds of a 

Approval By making 

points to wnot applicamakes the 
14 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

federal New Source Performance Standard (Regulation No. 6, Part A); or (3) participates in the early reduction program of the Federal Act, section 112. Ancillary operations such as fueling stations located at farms or ranches are not exempt from Air Pollutant Emission Notice and permit requirements unless otherwise below the de minimis emission levels contained in this regulation, and are not exempt from other applicable regulation promulgated by the commission.

A-II.D.1.h. A-II.D.1.h. Emissions from construction. Approval Clerical chA-II.D.1.i. A-II.D.1.i. Laboratories and research & development facilities Approval Addition o

of the languseen as an 

A-II.D.1.i.(i). through A-II.D.1.i.(iii). 

A-II.D.1.i.(a) through A-II.D.1.i.(c). 

Laboratories and research & development facilities No Action No change

A-II.D.1.j. A-II.D.1.j. Disturbance of surface areas Approval Clerical chA-II.D.1.k. A-II.D.1.k. Individual pieces of fuel burning equipment Approval Clerical chA-II.D.1.l. A-II.D.1.l. Internal combustion engines powering portable drilling rigs No Action No changeA-II.D.1.m. A-II.D.1.m. Petroleum industry flares, not associated with refineries, 

combusting natural gas containing no hydrogen sulfide except 

No Action REPEALE

The remov
15 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

in trace (less than five hundred parts per million weight) amounts, approved by the Colorado Oil and Gas Conservation commission and having uncontrolled emissions of anypollutant of less than five tons per year. 

SIP more sto act on thRegister acproposed arepeal in a July 21, 20

A-II.D.1.n. A-II.D.1.n. Chemical storage tanks or containers 

...that have an annual average daily throughput...

Approval Clerical ch

eliminates on which thbased. 

A-II.D.1.o. through A-II.D.1.p. 

A-II.D.1.o. through A-II.D.1.p. 

Unpaved roadways through Road & streets sanding 

No Action No change

A-II.D.1.q. A-II.D.1.q. Open burning activities 

Open burning activities, except that all reporting and 

permitting requirements that apply to such operations must be followed (see Regulation No. 1 9)...

Disapproval During the 

of the open moved by tNumber 1 t(which is a therefore othen back tthe same ti20, 2003 reactivities” 
16 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

that changeNumber 1 a reference Since, as nNumber 9 iState, EPA change to tNumber 9. 

A-II.D.1.r. through A-II.D.1.w. 

A-II.D.1.r. through A-II.D.1.w. 

Brazing, soldering, or welding operations through Demolition and re-bricking furnaces and kilns. 

No Action No change

A-II.D.1.x. & A-II.D.1.y. 

A-II.D.1.x. & A-II.D.1.y. 

Road and lot paving operations and Adhesive use not related to production. 

Approval Clerical ch

A-II.D.1.z. A-II.D.1.z. Fire training activities No Action No changeA-II.D.1.aa. & A-II.D.1.bb. 

A-II.D.1.aa. & A-II.D.1.bb. 

Caulking operations and Landscaping and housekeeping devices 

 Approval Clerical ch

A-II.D.1.cc. & A-II.D.1.dd. 

A-II.D.1.cc. & A-II.D.1.dd. 

Fugitive emissions from landscaping activities and Landscaping use of pesticides,...

No Action No change
17 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

A-II.D.1.ee. A-II.D.1.ee Crude oil or condensate loading truck equipment No Action REPEALE

The removSIP more sto act on thRegister acproposed arepeal in a July 21, 20

A-II.D.1.ff. through A-II.D.1.jj. 

A-II.D.1.ff. through A-II.D.1.jj. 

Emergency events through Beauty salons 

No Action No change

A-II.D.1.kk. A-II.D.1.kk. Operations involving acetylene, butane, propane and other 

flame cutting torches 

Approval Clerical ch

A-II.D.1.ll. & A-II.D.1.mm. 

A-II.D.1.ll. & A-II.D.1.mm. 

Pharmacies and Chemical storage areas 

No Action No change

A-II.D.1.nn. A-II.D.1.nn. Architectural painting, roof coating material and associated 

surface preparation (except for sandblasting and except for volatile organic compound emissions, associated with surface preparation, above Air Pollutant Emission Notice de minimis 

Approval This exemp

substantive relating to 
18 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

levels) for maintenance purposes at industrial or commercial facilities. 

A-II.D.1.oo. A-II.D.1.oo. Emissions that are neither ‘criteria’ or ‘noncriteria’ 

These emissions include methane, ethane and carbon dioxide. 

Approval This exemp

substantive relating to 

A-II.D.1.pp. through A-II.D.1.tt. 

A-II.D.1.pp. through A-II.D.1.tt. 

Janitorial activities and products through Office emissions, including cleaning, copying, and restrooms. 

No Action No change

A-II.D.1.uu. A-II.D.1.uu. Oil production wastewater... No Action REPEALE

The removSIP more sto act on thRegister acproposed arepeal in a July 21, 20

A-II.D.1.vv. through A-II.D.1.zz. 

A-II.D.1.vv. through A-II.D.1.zz. 

Electrically operated curing ovens...

through Storage of butane, propane, or liquefied petroleum gas...

No Action No change

A-II.D.1.aaa. A-II.D.1.aaa Storage tanks of capacity <40,000 gallons... Approval Clerical ch
19 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

A-II.D.1.bbb. A-II.D.1.bbb. Venting of compressed natural gas. Approval Clerical chA-II.D.1.ccc. A-II.D.1.ccc. Fuel storage of dispensing equipment in ozone attainment 

areas. Fuel storage and dispensing equipment in ozone attainment 

areas operated solely for company owned vehicles where the daily fuel throughput is no more than four hundred gallons per 

day, averaged over a 30 day period that is calculated as an 

annual average. Sources in an ozone attainment/maintenance area must utilize Stage 1 vapor recovery on all tanks greater than 550 gallons capacity, as required by Regulation Number 7, in order to take this exemption.

Approval This exemp

superseded 63 standardfacilities (7As a result standards, tbe taken (srecommendColorado cexemption. 

A-II.D.1.ddd. A-II.D.1.ddd. Crude oil or condensate storage tanks with capacity of 40,000 

gallons or less. 

No Action REPEALE

The removSIP more sto act on thRegister acproposed arepeal in a July 21, 20

A-II.D.1.eee. A-II.D.1.eee. Indirect sources. No Action No changeA-II.D.1.fff. A-II.D.1.fff. Storage tanks. Approval Clerical ch
20 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

II.D.1.fff.(ii)(D): oil/water mixtures with a vapor pressure equal to or lower than that of diesel fuel (Reid Vapor pressure

of 0.025 pounds per square inch absolute). 

A-II.D.1.ggg. A-II.D.1.ggg. Individual pieces of fuel burning equipment that use gaseous 

fuel...

Approval Clerical ch

A-II.D.1.hhh. through A-II.D.1.kkk. 

A-II.D.1.hhh. through A-II.D.1.kkk. 

Natural gas vehicle fleet fueling facilities through Forklifts 

No Action No change

A-II.D.1.lll. A-II.D.1.lll. Oil and gas exploration and production operations 

Oil and gas exploration and production operations (well site and associated equipment) shall provide written notice to the 

Colorado Oil and Gas Conservation Commission of proposed 

drilling locations prior to commencement of such operations. Air Pollutant Emission Notices are not required until after exploration and/or production drilling, workovers, completions, and testing are finished. If production will result in reportable emissions, the owner or operator shall file an Air Pollutant Emission Notice with the Division within thirty days after the well completion or recompletion report and log is filed with the appropriate state 

Approval Change 1: 

without imChange 2: first day of owner or oAPEN. Thstringent. 
21 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

or federal agency. If production will not occur, or production will not result in reportable emissions, the owner or operator shall submit written notice to the Division indicating that the well was plugged, or that emissions are otherwise not reportable. If production will result in reportable emissions, the owner or operator shall file an Air Pollutant Emission Notice with the Division within thirty days after the report of first production is filed with the appropriate state or federal agency but no later than ninety days following the first day of production.

A-II.D.1.mmm. A-II.D.1.mmm. Handling equipment. No Action No changeA-II.D.1.nnn. NA Fugitive emissions of hazardous air pollutants that are natural 

constituents of native soils and rock (not added orconcentrated by chemical or mechanical processes) from underground mines or surface mines unless such source is a major source of hazardous air pollutants under Part C of Regulation Number 3.

Approval This exemp

substantive relating to and thus EP

A-II.D.1.ooo. NA The use of pesticides, fumigants, and herbicides when used in 

accordance with requirements established under the federal Insecticide, Fungicide and Rodenticide Act as established by the U.S. EPA (United States Code Title 7, Section 136 et seq.).

Approval Such sourc

in the SIP aapproval of 
22 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

A-II.D.1.ppp. NA Ventilation of emissions from mobile sources operating within 

a tunnel, garage, or building.

Approval The exemp

mobile sou3) is operatpurposes. SIP revisiothe applica

A-II.D.1.qqq. NA Non-asbestos demolition. Approval The overal

deemed to criteria pol

A-II.D.1.rrr. NA Sandblast equipment when the blast media is recycled and the 

blasted material is collected, including small sandblast glove booths.

Approval The overal

deemed to criteria pol

A-II.D.1.sss. NA Stationary Internal Combustion Engines that meet the 

following specifications: (i). Less than or equal to 175 horsepower that operate 

 less than 1,450 hours per year; or

 (ii). Greater than 175 horsepower and less than or equal 

 to 300 horsepower that operate less than 850 hours 

 per year; or

(iii). Greater than 300 horsepower and less than or equal 

 to 750 horsepower that operate less than 340 hours 

 per year.

Disapproval The provis

operators thkeep recordAs a resultoperation iUnder the pguidance dthe provisiono requiremof operatio
23 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

Section 110EPA shall nwould interrequiremenreasonable applicable the linked epermitting, pollutants aagain, NOxthe exemptFor this reaprovision aproposes to exemption 

A-II.D.1.ttt. NA Emergency power generators that:

 (i). Have a rated horsepower of less than 260; or

 (ii). Operate no more than 250 hours per year and have 

 a rated horsepower of less than 737; or

 (iii). Operate no more than 100 hours per year and have 

 a rated horsepower of less than 1,840.

Disapproval For similar 

above, for limitations unenforceadisapprove and A-II.Dthe other hhours of op
24 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

However, ato 260 hp, may be evefrom the fircombustion II.D.1.sss. raises the isection 110proposes to exemption 

A-II.D.1.uuu. NA Surface water storage impoundment of not potable water and 

storm water evaporation ponds.

No Action EPA propo

(75 FR 423provision cexemption 

A-II.D.1.vvv. NA Non-potable water pipeline vents. Approval The overal

deemed to criteria pol

A-II.D.1.www. NA Steam vents and safety release valves. Approval The overal

deemed to criteria pol

A-II.D.1.xxx. NA Deaerator/vacuum pump exhausts Disapproval This provis

emissions b
25 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

the liquid oIf the liquid high levels precursors liquid or mof criteria pthese deviclinked to expermitting, emissions oprecursors)Under sectcannot appinterfere wconcerning further prorequirementhese statiosignificant the exemptensure that of these souattainment (see 40 CF
26 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

A-II.D.1.yyy. NA Seal and lubricating oil systems for steam turbine electric 

generators.

Approval These activ

more than Additionallsources are emissions o

A-II.D.1.zzz. NA Venting of natural gas lines for safety purposes. Approval These activ

more than Additionallsources are emissions o

A-II.D.1.aaaa. NA Chemical Storage Tanks.

 (i). Sulfuric acid storage tanks not to exceed ten 

 thousand five hundred gallons capacity.

 (ii). Sodium hydroxide storage tanks.

Approval The overal

deemed to criteria pol

A-II.D.1.bbbb. NA Containers, reservoirs, or tanks used exclusively for dipping 

operations that contain no organic solvents for coating objects with oils, waxes, greases, or natural or synthetic resins.

Approval In addition

State on Declarified thintended to equipment coating objnot contain 

A-II.D.1.cccc. NA Wet screening operations notwithstanding the applicability of Approval The overal
27 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

the New Source Performance Standards included in the Code of Federal Regulations, Title 40, Part 60, Subpart OOO.

deemed to criteria pol

A-II.D.1.dddd. NA Non-road engines as defined in Section I.B.29. of this Part A, 

except certain non-road engines subject to state-only air pollutant emission notice and permitting requirements pursuant to Section I.B.29.c. of this part.

Approval The definit

Section I.Bfederal def40 CFR 10of the CAA specifically of stationarColorado ASection II.A

A-II.D.1.eeee. NA Condensate storage tanks. No Action REPEALE

The removSIP more sto act on thRegister acproposed arepeal in a July 21, 20

A-II.D.1.ffff. NA Air Curtain Destructors burning only yard waste, wood waste, 

and clean lumber, or any mixture thereof generated as a result of projects to reduce the risk of wildfire and are not located at a commercial or industrial facility. Air curtain incinerators 

Disapproval Under the d

subsequent Provisions destructors 
28 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

that are considered incinerators as defined by the Common Provisions do not meet this exemption.

Source Perconsidered 16, 2005, EFR 74870) guidelines solid waste Under this (called air are subject exemption, Additionallthis exempvalid and thdisapprova

A-II.D.2. A-II.D.2. Incinerators Approval Clerical chA-II.D.3. A-II.D.3. Emergency and backup generators which are ancillary to main 

units. 

Approval Clerical ch

A-II.D.4. A-II.D.5. APEN exemption requests 

 c. None of the activities submitted as exemption requests  to the Division may be taken by a source until the  commission has duly adopted the exemptions as  revisions to this Regulation No. 3 and EPA has 

Approval Removal o

eliminates II.D.5.c. 
29 

TSD Table – Colorado APEN Revisions 

in the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado S

APEN 

Provisions No. in 

2007 Revised 

Colorado SIP 

APEN 

Provisions No. in 

EPA-Approved 1997 

Colorado SIP 

Provisions Description/Language Changes: Underlined Text: Language additions/changes with 

respect to the EPA-approved provisions as of 1/21/1997. Strikethrough: Language deletions from the 1997 EPAapproved SIP. 

EPA’s 

Proposed 

Action 

EPA’s C

 approved the exemption requests.  d. The Division will annually submit the list of requested 

 exemptions to the Commission for adoption and the 

 EPA for approval, along with the Division’s 

 preliminary determination of the appropriateness of 

 each request for exemption.

 e. In order to be made a part of the Division’s annual 

 submission in a particular year, a source must submit 

 its request(s) for exemption along with all the required 

 documentation supporting such request, no later than 

 August 1 of that year.

A-II.D.5. A-II.D.6. Commercial laboratories. Approval Clerical ch

significant 

A-II.D.6. A-II.D.7. Research and development activities. Approval Renumberi

The languaretained.