1TECHNICAL SUPPORT DOCUMENT (TSD)EPA PROPOSED RULE ACTIONCOLORADO AIR POLLUTANT EMISSION NOTICES (APEN) SIPREVISIONSSUBMITTED BY THE STATE OF COLORADOOnSeptember 16, 1997; June 20, 2003; July 11, 2005; August 8, 2006; August 1, 2007Docket No. EPA-R08-OAR-2007-0649Prepared by:Crystal Freeman, Air ProgramU.S. Environmental Protection Agency, Region 81595 WynkoopSt., Denver, CO 80202(303) 312-6436January 24, 20112This Technical Support Document (TSD) examines theAir Pollutant Emission Notice (APEN) revisions to the State of Coloradoair quality provisions in Regulation No.3, Part A,sections II.A. through II.D., submitted to EPA between 1997 and 2007. During thisperiod the State of Colorado submitted APEN SIP revisions on September 16, 1997, June 20, 2003, July 11, 2005, August 8, 2006 andAugust 1, 2007. This document lists all the provisions in air quality Regulation No. 3, Part A, sections II.A. through (and including) II.D.,as they appear in the August 1, 2007 submittal. From left to right, the columns in the TSD Table specify the following: (1) provisionnumber in the August 1, 2007 version of RegulationNo. 3; (2) 1997 EPA-approved provisions by their provision number withinRegulation No. 3, Part A, section II.A through II.D.; (3) provisions’ title or summary description, followed by the reproduction of thesubstantively revised language (if any) of the 2007version with respect to its 1997 EPA-approved version; (4) EPA’s action proposal-i.e.,proposed approval, disapproval, or no action; (5) EPA’s evaluation of the nature of the changes (if any). For brevity and readability,changes that are clerical in nature, such as style,grammar, or format changes that do not affect thesubstance of the provisions, are notdetailed in this TSD Table. Rather, their occurrence is referred to under the general “clerical changes” note in the “Comments” column.It is to be noted that the TSD Table lists also sixprovisions (exempting sources from APEN requirements) that were repealed bythe State of Colorado in 2008, and submitted to EPAin June 2009. EPA is not proposing to act on these provisions in this FederalRegister action because EPA has already proposed approval of their repeal in a separate action published July 21, 2010 (75 FR 42346).3TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)Part A, Section II.A.A-II.A. A-II.A. APENs for New, Modified, and Existing SourcesExcept as specifically exempted in Section II.D., no personshall allow emission of air pollutants from, or construction,modification or alteration of, any facility, process, andoractivity which constitutes a stationary source, ...Approval The addition of “or” clarifies that sourcesrequired to file APENs are all onescovered by one of the categories listed.Additional style changes do not modifythe substance of the approved 1997 SIP.Part A, Section II.B.A-II.B. A-II.B. GeneralNo Action No changes.A-II.B.1. A-II.B.1. Emission EstimateApproval Clerical changes only.A-II.B.1.a. A-II.B.1.a. Emission Estimate: alternative methodNo Action No changes.A-II.B.1.b. A-II.B.1.b. Emission Estimate: alternative method...If none of the above methods are available or applicable tothe source, an appropriate method will be determined on acase by case basis by the Division, taking into account theprovisions of Section II.E.2. of this Regulation No. 3, Part A.Section II.C.2. of this Part A...ApprovalChange 1 –This reference was anobvious clerical error corrected by theState, with the June 20, 2003 submission,to “Section II.C.2.” The correctedreference specifies thresholds forsignificant emission changes, whichrelate to the accuracy required for4TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)...Applications for Construction Permits must includeanAPEN.emission estimates. The lower thesignificant emission changes threshold,the greater the precision required of anacceptable alternate emissions estimate.Change 2 –This requirement remainedunchanged in Regulation No. 3, as it wasmoved to Section III.B.2. of Part B.A-II.B.2. A-II.B.2. Air Pollutant Emission Notice TermAPENAir Pollutant Emission NoticeTermApproval Clerical changes only.A-II.B.3. A-II.B.3. APEN ApplicabilitySource DefinitionAPEN ApplicabilityApproval Title change more accurately reflects thecontent of this section, which remainedsubstantively the same.A-II.B.3.a. A-II.B.3.a. Criteria PollutantsFor criteria pollutants, Air Pollutant Emission Notices arerequired for: each individual emission point in anonattainment area with uncontrolled actual emissions of oneton per year or more of any individual criteria pollutant(pollutants are not summed) for which the area isnonattainment; each individual emission point in anattainment or attainment/maintenancearea with uncontrolledApproval The revisions clarify the understandingthat the one ton per year (tpy) threshold innonattainment areas applies to thepollutants for which the area is innonattainment. EPA proposes approvalof this revision because the change doesnot make the SIP less stringent or affectthe ambient air quality.5TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)actual emissions of two tons per year or more of anyindividual criteria pollutant (pollutants are not summed); eachindividual emission point with uncontrolled actualemissionsof lead greater than one hundred pounds per year, regardlessof where the source is located.A-II.B.3.b. A-II.B.3.b. Non-criteria Reportable Pollutants No Action EPA’s interpretation is that non-criteriapollutant provisions (and their revisions)submitted to us are not related to SIPrequirements or maintenance of theNAAQS.A-II.B.4. A-II.B.4. Source GroupingNo Action No changes.A-II.B.4.a. A-II.B.4.a. Source Grouping: classification codesApproval Clerical changes only.A-II.B.4.b. A-II.B.4.b. Source Grouping: sharing similar location within a facilityApproval Clerical changes only.A-II.B.4.c. A-II.B.4.c. Source Grouping: prohibition to group sources regulatedunder NSPS & with sources not regulated under NSPSApproval Clerical changes only.A-II.B.4.d. A-II.B.4.d. Source Grouping: no requirement for individual sources tomonitor emissions through use of continuous emissionmonitors.Approval Clerical changes only.A-II.B.4.e. A-II.B.4.e. Source Grouping: fuel usage, production and consumption Approval Clerical changes only.6TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)levels.A-II.B.4.f. A-II.B.4.f. Source Grouping: no individual source has previously beenissued individual permit.Approval Clerical changes only.N/AMoved to A-I.B.43A-II.B.5. Source Grouping: uncontrolled Actual Emissions Approval Clerical changes only.The move of this provision, by itself,does not impact the APEN requirementsand exemptions, nor the requirements ofother Colorado air quality provisions.A-II.B.5. A-II.B.6. Source Grouping: calendar yearNo Action No changes.A-II.B.6. A-II.B.7. Source Grouping: emission fee calendarNo Action No changes.N/A A-II.B.8. Source Grouping: effective date for sources not required tofile APENAPENs required under past versions of this regulation whichare no longer required are rescinded as of the effective date ofthis regulationApproval This provision is redundant and itsremoval does not impact the number ofsources required to file APENs.N/AMoved to A-I.B.16A-II.B.9. Source Grouping: identification of criteria pollutantsThose pollutants for which the U.S. EPA has establishedApproval The revision generally defines criteriapollutants as those for which EPA hasestablished a NAAQS. The revision also7TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)national ambient air quality standards, including:carbonmonoxide, nitrogen dioxide (direct emissions and asaprecursor to ozone),sulfur dioxide, PM10, PM2.5, totalsuspended particulate matter, ozone, volatile organiccompounds (as a precursor to ozone), and lead.identifies NOx and volatile organiccompounds (VOCs) as precursors toozone. EPA proposes approval of thisrevision because it makes the definitionof criteria pollutants (for the purposes ofAPEN applicability) consistent with thefederal definition. In the same submittal,the AQCC renumbered the provision toI.B.16. EPA is also proposing to approvethis renumbering, which does not affectthe applicability of the provision. EPAnotes that since prior to this renumberingSection I.B.16 was “reserved,” the moveof II.B.9 to this section does not replaceany other provision, and therefore doesnot impact the stringency of the SIP.N/A A-II.B.10. Source Grouping: filing dates for existing sourcesA-II.B.10. For existing sources, APENs for non-criteriareportable pollutants listed in Appendix B shall besubmittedto the Division no later than December 31, 1993. APENs fornon-criteria reportable pollutants listed in Appendix C shall besubmitted no later than December 31, 1994.Approval EPA’s interpretation is that non-criteriapollutants (and their revisions) submittedto us are not related to SIP requirementsor maintenance of the NAAQS; thus theremoval of this provision is consistentwith what should be in the SIP.8TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)Part A, Section II.C.A-II.C. A-II.C. Revised Air Pollutant Emission NoticesApproval Clerical changes only.A-II.C.1. A-II.C.1. APEN – filing triggering eventsApproval Clerical changes only.A-II.C.1.a. A-II.C.1.a. List of APEN – filing triggering events...as defined below in Paragraph 2...(as defined in SectionII.C.2.)...Approval Clerical changes only.A-II.C.1.b.throughA-II.C.1.g.A-II.C.1.b.throughA-II.C.1.g.List of APEN – filing triggering events No Action No changes.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 inSection I.B.58. of this regulation,...in Section II.A.25. of PartD of this Regulation Number 3.Approval The revision is intended to update thereference to the definition of “majorstationary source. However, thereference specified, Section II.A.25.,gives the definition of “Minor SourceBaseline Date,” while Section II.A.24.defines “Major Stationary Source.” EPAhas discussed this with the State; the Stateconcurs that the reference should be“Section II.A.24.” and has agreed tocorrect this discrepancy in a later9TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)submittal to EPA. Given that the correctreference can be determined from thecontext, EPA proposes approval of therevision.A-II.C.2. A-II.C.2. Significant changeApproval Clerical changes only.A-II.C.2.a. A-II.C.2.a. Significant change for non-criteria pollutants. No Action No changes.A-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: sourcesemitting<100 tpyApproval Clerical changes only.A-II.C.2.b.(ii). A-II.C.2.b.(ii). Significant change for criteria pollutants: VOCs and NOxsources.For volatile organic compound and nitrogen oxidessources inozone nonattainment areas emitting less than one hundred tonsof volatile organic compound per year.Approval The addition of NOx is consistent withEPA’s regulations regarding ozone andits precursors.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: sourcesemitting≥100 tpy; and lead sources.Approval Clerical changes only.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 NoticesubmittalsApproval Clerical changes only.10TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)A-II.C.3.c. A-II.C.3.c. Timeframe for Revised Air Pollutant Emission Noticesubmittals: control equipment....a change in annualactual emission rates...Approval The text addition eliminates an ambiguityas to the timeframe on which theemission rates calculations are based.A-II.C.3.d. A-II.C.3.d. Timeframe for Revised Air Pollutant Emission NoticesubmittalsAir Pollutant Emission Notices for changes in controlequipment must be submitted before the change occurs;except for control equipment at condensate storagetankslocated at oil and gas exploration and production facilitiessubject to the requirements in Regulation Number 7,SectionXII. For this control equipment, a revised APEN shall be filedonce per year, as specified in Section II.C.3.c. ofPart A, if anycontrol equipment is added or if control equipmentisrelocated or removed.Approval The revised provision changes the timeAPENs are due for control equipment atcondensate storage tanks located at oiland gas exploration facilities. However,the revision does not exempt such sourcesfrom reporting and therefore does notrelieve them from any substantiverequirements of the SIP. As the revisiondoes not impact emission levels andambient air quality standards, EPA isproposing to approve it.Part A, Section II.D.A-II.D. A-II.D. Exemptions from APENAir Pollutant Emission NoticeRequirementsApproval Clerical changes only.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 emissionunits specifically identified in the applicabilitysection of anyApproval The revised text updates, as appropriate,the references to the current StateRegulations without affecting substantive11TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)subpart of Part A of Regulation No. 6(New SourcePerformance Standards) and/or Regulation No. 8(HazardousAir Pollutants), Parts A, C, D, and E. However, Air PollutantEmission Notices need not be filed for wet screeningoperationssubject to Subpart OOO of the New SourcesPerformance Standards if the exemption in section II.D.1.cccc.is applicable.Stationary sourceshaving emission units that are exempt fromthe requirement to file an Air Pollutant Emission Notice mustnevertheless comply withall requirements that are otherwiseapplicable specifically to the exempted emission units,including, but not limited to:Title V, Prevention of SignificantDeterioration, nonattainment New Source Review, opacitylimitations, odor limitations, particulate matter limitations andvolatile organic compound controls.An applicant may not omit any information regardingAPENexempt emission units in any permit application ifsuchinformation is needed to determinethe applicability of Title V(Part C of this Regulation No. 3), Prevention of SignificantDeterioration (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 filerequirements in the SIP relating toemissions of criteria pollutants.12TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)Air Pollutant Emission NoticesAPENsbecause bythemselves, or cumulatively as a category, they aredeemed tohave a negligible impact on air quality.N/A A-II.D.4.b.Notwithstanding paragraph 4.a., above, sources which aresubject solely to the following requirements, or toacombination of such requirements, are allowed to takeexemptions.(i)Sources which are subject to the general opacitystandard contained in Regulation No. 1.(ii) Sourceswhich are subject to the general fuelburning, manufacturing process, and fugitive particulatestandards contained in Regulation No. 1 and Part BofRegulation No. 6.(iii) Sources which are not subject to a specific RACTrequirement of Regulation No. 7.(iv) Sources subject to Regulation No. 2, as set forth inSection II.D.1.rr. of this Regulation No. 3, Part A.APEN exemptions taken under this paragraph do notaffect the applicability of the regulations to thesource.Approval Removal of this provision makes the SIPmore stringent since sources can’t utilizethis exemption anymore.A-II.D.1.a. A-II.D.1.a. Individual emission pointsin nonattainment areas havinguncontrolled actual emissions of any criteria pollutant of lessthan one ton per year, and individual emission points inattainment or attainment/maintenance areashavinguncontrolled actual emissions of any criteria pollutant of lessApproval Revision clarifies the applicability of theexemption without affecting thestringency of the SIP or impacting airquality.13TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)than two tons per year, and each individual emission pointwith uncontrolled actual emissions of lead less than onehundred pounds per year, regardless of where the sources islocated.A-II.D.1.b.throughA-II.D.1.e.A-II.D.1.b.throughA-II.D.1.e.Individual emission points of non-criteria reportable pollutantsthroughEquipment for non-commercial cooking for food.No Action No changes.A-II.D.1.f. A-II.D.1.f. Safety flaresFlaresused to indicate danger to the publicApproval Revised language is more stringent.A-II.D.1.g. A-II.D.1.g. Agricultural operations normally conducted at the farm orranch including, for example, cultivating and harvesting. Thisshall not include grain elevator operations, feed milloperations or other post harvesting activities normally notconducted on the farm or ranch.Agricultural operations such as farming, cultivating,harvesting, seasonal crop drying, grain handling operationsthat are below New Source Performance Standards deminimislevels (including milling and grain elevator operations), andanimal feeding operations that are not housed commercialswine feeding facilities as defined in Regulation No. 2, Part B.This exemption does not apply to an agricultural operationthat: (1) is a major source (as defined in sectionI.B.23. of thisPart); (2) meets or exceeds the storage capacity thresholds of aApproval By making the categories of emissionpoints to which the APEN exemption isnot applicable more specific, this revisionmakes the SIP more stringent.14TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)federal New Source Performance Standard (RegulationNo. 6,Part A); or (3) participates in the early reductionprogram ofthe Federal Act, section 112. Ancillary operationssuch asfueling stations located at farms or ranches are not exemptfrom Air Pollutant Emission Notice and permit requirementsunless otherwise below the de minimis emission levelscontained in this regulation, and are not exempt from otherapplicable regulation promulgated by the commission.A-II.D.1.h. A-II.D.1.h. Emissions from construction.Approval Clerical changes only.A-II.D.1.i. A-II.D.1.i. Laboratories and research &development facilitiesApproval Addition of title without changes to anyof the language under its subsections isseen as an insignificant change.A-II.D.1.i.(i).throughA-II.D.1.i.(iii).A-II.D.1.i.(a)throughA-II.D.1.i.(c).Laboratories and research & development facilitiesNo Action No changes.A-II.D.1.j. A-II.D.1.j. Disturbance of surface areas Approval Clerical changes only.A-II.D.1.k. A-II.D.1.k. Individual pieces of fuel burning equipment Approval Clerical changes only.A-II.D.1.l. A-II.D.1.l. Internal combustion enginespowering portable drilling rigs No Action No changes.A-II.D.1.m. A-II.D.1.m. Petroleum industry flares,not associated with refineries,combusting natural gas containing no hydrogen sulfide exceptNo Action REPEALEDThe removal of exemptions makes the15TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)in trace (less than five hundred parts per millionweight)amounts, approved by the Colorado Oil and Gas Conservationcommission and having uncontrolled emissions of anypollutant of less than five tons per year.SIP more stringent. We are not proposingto act on this provision in this FederalRegister action because EPA has alreadyproposed approval of this provision’srepeal in a separate action published onJuly 21, 2010 (75 FR 42346).A-II.D.1.n. A-II.D.1.n. Chemical storage tanks or containers...that have an annualaverage daily throughput...Approval Clerical changes and text additioneliminates ambiguity as to the timeframeon which the average daily throughput isbased.A-II.D.1.o.throughA-II.D.1.p.A-II.D.1.o.throughA-II.D.1.p.Unpaved roadwaysthroughRoad & streets sandingNo Action No changes.A-II.D.1.q. A-II.D.1.q. Open burning activitiesOpen burning activities, except that all reportingandpermitting requirements that apply to such operations must befollowed (see Regulation No. 19)...Disapproval During the period considered here, someof the open burning provisions weremoved by the State from RegulationNumber 1 to Regulation Number 9(which is a State-only Regulation, andtherefore outside the Colorado SIP) andthen back to Regulation Number 1. Atthe same time, Colorado submitted a June20, 2003 revision of the “Open burningactivities” provision in Section II.D.1.q.16TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)that changed a reference to RegulationNumber 1 (part of the Colorado SIP) intoa reference to Regulation Number 9.Since, as noted above, RegulationNumber 9 is enforceable only by theState, EPA proposes to disapprove thechange to the reference to RegulationNumber 9.A-II.D.1.r.throughA-II.D.1.w.A-II.D.1.r.throughA-II.D.1.w.Brazing, soldering, or welding operationsthroughDemolition and re-bricking furnaces and kilns.No Action No changes.A-II.D.1.x. &A-II.D.1.y.A-II.D.1.x. &A-II.D.1.y.Road and lot paving operationsandAdhesive use not related to production.Approval Clerical changes only.A-II.D.1.z. A-II.D.1.z. Fire training activitiesNo Action No changes.A-II.D.1.aa. &A-II.D.1.bb.A-II.D.1.aa. &A-II.D.1.bb.Caulking operationsandLandscaping and housekeeping devicesApproval Clerical changes only.A-II.D.1.cc. &A-II.D.1.dd.A-II.D.1.cc. &A-II.D.1.dd.Fugitive emissions from landscaping activitiesandLandscaping use of pesticides,...No Action No changes.17TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)A-II.D.1.ee. A-II.D.1.eeCrude oil or condensate loading truck equipment NoAction REPEALEDThe removal of exemptions makes theSIP more stringent. We are not proposingto act on this provision in this FederalRegister action because EPA has alreadyproposed approval of this provision’srepeal in a separate action published onJuly 21, 2010 (75 FR 42346).A-II.D.1.ff.throughA-II.D.1.jj.A-II.D.1.ff.throughA-II.D.1.jj.Emergency eventsthroughBeauty salonsNo Action No changes.A-II.D.1.kk. A-II.D.1.kk.Operations involvingacetylene, butane, propane and otherflame cutting torchesApproval Clerical changes only.A-II.D.1.ll. &A-II.D.1.mm.A-II.D.1.ll. &A-II.D.1.mm.PharmaciesandChemical storage areasNo Action No changes.A-II.D.1.nn. A-II.D.1.nn. Architectural painting, roof coating materialand associatedsurface preparation (except for sandblasting and except forvolatile organic compound emissions, associated with surfacepreparation, above Air Pollutant Emission Notice deminimisApproval This exemption will not affect anysubstantive requirement in the SIPrelating to emissions of criteria pollutants.18TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)levels) for maintenance purposes at industrial or commercialfacilities.A-II.D.1.oo. A-II.D.1.oo. Emissions that are neither ‘criteria’ or ‘noncriteria’These emissions include methane, ethane and carbondioxide.Approval This exemption will not affect anysubstantive requirement in the SIPrelating to emissions of criteria pollutants.A-II.D.1.pp.throughA-II.D.1.tt.A-II.D.1.pp.throughA-II.D.1.tt.Janitorial activities and productsthroughOffice emissions, including cleaning, copying, andrestrooms.No Action No change.A-II.D.1.uu. A-II.D.1.uu. Oil production wastewater...No Action REPEALEDThe removal of exemptions makes theSIP more stringent. We are not proposingto act on this provision in this FederalRegister action because EPA has alreadyproposed approval of this provision’srepeal in a separate action published onJuly 21, 2010 (75 FR 42346).A-II.D.1.vv.throughA-II.D.1.zz.A-II.D.1.vv.throughA-II.D.1.zz.Electrically operated curing ovens...throughStorage of butane, propane, or liquefied petroleumgas...No Action No changes.A-II.D.1.aaa. A-II.D.1.aaaStorage tanks of capacity <40,000 gallons...Approval Clerical changes only.19TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)A-II.D.1.bbb. A-II.D.1.bbb. Venting of compressed natural gas.Approval Clerical changes only.A-II.D.1.ccc. A-II.D.1.ccc. Fuel storage of dispensing equipment in ozone attainmentareas.Fuel storage and dispensing equipment in ozone attainmentareas operated solely for company owned vehicles where thedaily fuel throughput is no more than four hundredgallons perday, averaged over a 30 day periodthat is calculated as anannual average. Sources in an ozone attainment/maintenancearea must utilize Stage 1 vapor recovery on all tanks greaterthan 550 gallons capacity, as required by Regulation Number7, in order to take this exemption.Approval This exemption appears to have beensuperseded by the promulgation of part63 standards for gasoline distributionfacilities (73 FR 1916 (Jan. 10, 2008)).As a result of the applicability of thesestandards, the exemption may no longerbe taken (see A-II.D.4.a). EPArecommends that, in a future submittal,Colorado clarify the applicability of thisexemption.A-II.D.1.ddd. A-II.D.1.ddd. Crude oil or condensatestorage tanks with capacity of 40,000gallons or less.No Action REPEALEDThe removal of exemptions makes theSIP more stringent. We are not proposingto act on this provision in this FederalRegister action because EPA has alreadyproposed approval of this provision’srepeal in a separate action published onJuly 21, 2010 (75 FR 42346).A-II.D.1.eee. A-II.D.1.eee.Indirect sources.No Action No changes.A-II.D.1.fff. A-II.D.1.fff. Storage tanks.Approval Clerical changes and language revision.20TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)II.D.1.fff.(ii)(D): oil/water mixtures with a vapor pressureequal to orlower than that of diesel fuel (Reid Vapor pressureof 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 gaseousfuel...Approval Clerical changes only.A-II.D.1.hhh.throughA-II.D.1.kkk.A-II.D.1.hhh.throughA-II.D.1.kkk.Natural gas vehicle fleet fueling facilitiesthroughForkliftsNo Action No changes.A-II.D.1.lll. A-II.D.1.lll. Oil and gas explorationand production operationsOil and gas exploration and production operations (well siteand associated equipment) shall provide written notice to theColorado Oil and Gas Conservation Commissionof proposeddrilling locations prior to commencement of such operations.Air Pollutant Emission Notices are not required until afterexploration and/or production drilling, workovers,completions, and testing are finished.If production will result in reportable emissions,the owner oroperator shall file an Air Pollutant Emission Notice with theDivision within thirty days after the well completion orrecompletion report and log is filed with the appropriate stateApprovalChange 1: The revision adds specificitywithout impacting air quality.Change 2: Specifies timeframe, after thefirst day of production, within which anowner or operator is required to file anAPEN. This revision makes the SIP morestringent.21TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)or federal agency. If production will not occur, or productionwill not result in reportable emissions, the owneror operatorshall submit written notice to the Division indicating that thewell was plugged, or that emissions are otherwise notreportable. If production will result in reportable emissions,the owner or operator shall file an Air Pollutant EmissionNotice with the Division within thirty days after the report offirst production is filed with the appropriate state or federalagency but no later than ninety days following thefirst day ofproduction.A-II.D.1.mmm. A-II.D.1.mmm. Handling equipment.No Action No changes.A-II.D.1.nnn. NA Fugitive emissions of hazardous air pollutants that are naturalconstituents of native soils and rock (not added orconcentrated by chemical or mechanical processes) fromunderground mines or surface mines unless such source is amajor source of hazardous air pollutants under PartC ofRegulation Number 3.Approval This exemption will not affect anysubstantive requirement in the SIPrelating to emissions of criteria pollutantsand thus EPA is proposing approval.A-II.D.1.ooo. NA The use of pesticides, fumigants,and herbicides when used inaccordance with requirements established under thefederalInsecticide, Fungicide and Rodenticide Act as established bythe U.S. EPA (United States Code Title 7, Section 136 etseq.).Approval Such sources are not elsewhere regulatedin the SIP and therefore EPA proposesapproval of this exemption.22TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)A-II.D.1.ppp. NA Ventilation of emissions from mobile sources operating withina tunnel, garage, or building.Approval The exemption applies only when amobile source (as defined in Regulation3) is operating for transportationpurposes. We recommend that in a futureSIP revision the State of Colorado clarifythe applicability of the current provision.A-II.D.1.qqq. NA Non-asbestos demolition.Approval The overall impact for this exemption isdeemed to have negligible emissions ofcriteria pollutants.A-II.D.1.rrr. NA Sandblast equipment when the blastmedia is recycled and theblasted material is collected, including small sandblast glovebooths.Approval The overall impact for this exemption isdeemed to have negligible emissions ofcriteria pollutants.A-II.D.1.sss. NA Stationary Internal Combustion Engines that meet thefollowing specifications:(i). Less than or equal to 175 horsepower that operateless than 1,450 hours per year; or(ii). Greater than 175 horsepower and less than or equalto 300 horsepower that operate less than 850 hoursper year; or(iii). Greater than 300 horsepower and less than orequalto 750 horsepower that operate less than 340 hoursper year.Disapproval The provision does not require owners oroperators that claim the exemption tokeep records of the hours of operation.As a result, the limit on the hours ofoperation is unenforceable.Under the principle set out in theguidance discussed in the Proposed Rule,the provision is unenforceable, as there isno requirement to keep records of hoursof operation.23TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)Section 110(l) of the Act provides thatEPA shall not approve a SIP revision if itwould interfere with any applicablerequirement concerning attainment andreasonable further progress or any otherapplicable requirement of the Act. Due tothe linked exemption from constructionpermitting, emissions of criteriapollutants and their precursors (such as,again, NOx) may increase as a result ofthe exemption from APEN requirements.For this reason, and for the reason that theprovision appears be unenforceable, EPAproposes to disapprove the addition of theexemption in A.II.D.1.sss to the SIP.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 peryear and havea rated horsepower of less than 737; or(iii). Operate no more than 100 hours peryear and havea rated horsepower of less than 1,840.Disapproval For similar reasons to those discussedabove, for A-II.D.1.sss., EPA regards thelimitations on hours in tiers 2 and 3 asunenforceable and therefore proposes todisapprove subprovisions A-II.D.1.ttt.(ii)and A-II.D.1.ttt.(iii). Sources in tier 1, onthe other hand, do not have a limit onhours of operation.24TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)However, as tier 1 includes generators upto 260 hp, emissions from these sourcesmay be even greater than the emissionsfrom the first tier stationary internalcombustion engines discussed above, AII.D.1.sss. As with those engines, thisraises the issue of compliance withsection 110(l) of the Act. EPA thereforeproposes to also disapprove theexemption in A-II.D.1.ttt.(i).A-II.D.1.uuu. NA Surface water storage impoundmentof not potable water andstorm water evaporation ponds.No Action EPA proposed approval on July 21, 2010(75 FR 42346), of the revision to thisprovision creating an exception to thisexemption for oil production wastewater.A-II.D.1.vvv. NA Non-potable water pipeline vents.Approval The overall impact for this exemption isdeemed to have negligible emissions ofcriteria pollutants.A-II.D.1.www. NA Steam vents and safety release valves.Approval The overall impact for this exemption isdeemed to have negligible emissions ofcriteria pollutants.A-II.D.1.xxx. NA Deaerator/vacuum pump exhaustsDisapproval This provision would potentially exemptemissions both from the devices and from25TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)the liquid or gas the device operates on.If the liquid or gas operated on containshigh levels of criteria pollutants or theirprecursors (either in a dissolved form inliquid or mixed in gas), then high levelsof criteria pollutants may be emitted fromthese devices. As APEN exemptions arelinked to exemption from constructionpermitting, this exemption may increaseemissions of criteria pollutants (or theirprecursors).Under section 110(l) of the Act, EPAcannot approve a SIP revision if it wouldinterfere with any applicable requirementconcerning attainment and reasonablefurther progress or any other applicablerequirement of the Act. Furthermore, asthese stationary sources may emitsignificant amounts of criteria pollutants,the exemption from permitting fails toensure that construction or modificationof these sources will not interfere withattainment or maintenance of the NAAQS(see 40 CFR 51.160(a)(2)).26TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)A-II.D.1.yyy. NA Seal and lubricating oil systems for steam turbine electricgenerators.Approval These activities are not expected to emitmore than one ton of VOCs a year.Additionally, emissions from thesesources are deemed to have negligibleemissions of criteria pollutants.A-II.D.1.zzz. NA Venting of natural gas lines for safety purposes.Approval These activities are not expected to emitmore than one ton of VOCs a year.Additionally, emissions from thesesources are deemed to have negligibleemissions of criteria pollutants.A-II.D.1.aaaa. NA Chemical Storage Tanks.(i). Sulfuric acid storage tanks not to exceed tenthousand five hundred gallons capacity.(ii). Sodium hydroxide storage tanks.Approval The overall impact for this exemption isdeemed to have negligible emissions ofcriteria pollutants.A-II.D.1.bbbb. NA Containers, reservoirs, or tanksused exclusively for dippingoperations that contain no organic solvents for coating objectswith oils, waxes, greases, or natural or syntheticresins.Approval In additional materials submitted from theState on December 2, 2010, the Stateclarified that this APEN exemption isintended to apply to the specifiedequipment used for dipping operations forcoating objects with substances that donot contain organic solvents.A-II.D.1.cccc. NA Wet screening operations notwithstanding the applicability ofApproval The overall impact for this exemption is27TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)the New Source Performance Standards included in the Codeof Federal Regulations, Title 40, Part 60, SubpartOOO.deemed to have negligible emissions ofcriteria pollutants.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 airpollutant emission notice and permitting requirementspursuant to Section I.B.29.c. of this part.Approval The definition of non-road engines inSection I.B.29 is consistent with thefederal definition of non-road engine at40 CFR 1068.30. Under section 302(z)of the CAA non-road engines arespecifically excluded from the definitionof stationary sources, to which theColorado APEN requirements apply (seeSection II.A.).A-II.D.1.eeee. NA Condensate storage tanks. No Action REPEALEDThe removal of exemptions makes theSIP more stringent. We are not proposingto act on this provision in this FederalRegister action because EPA has alreadyproposed approval of this provision’srepeal in a separate action published onJuly 21, 2010 (75 FR 42346).A-II.D.1.ffff. NA Air Curtain Destructors burning only yard waste, wood waste,and clean lumber, or any mixture thereof generatedas a resultof projects to reduce the risk of wildfire and arenot located ata commercial or industrial facility. Air curtain incineratorsDisapproval Under the definition of “incinerator” in asubsequent revision to the CommonProvisions of Colorado’s SIP, air curtaindestructors that are subject to a New28TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)that are considered incinerators as defined by theCommonProvisions do not meet this exemption.Source Performance Standard (NSPS) areconsidered “incinerators.” On December16, 2005, EPA published a final rule (70FR 74870) for NSPS and emissionguidelines for new and existing “other”solid waste incineration units (OSWI).Under this rule, air curtain destructors(called air curtain incinerators in the rule)are subject to an NSPS. As a result, thisexemption, II.D.1.ffff., is superseded.Additionally, Colorado has agreed thatthis exemption, II.D.1.ffff., is no longervalid and thus EPA is proposingdisapproval.A-II.D.2. A-II.D.2. IncineratorsApproval Clerical changes only.A-II.D.3. A-II.D.3. Emergency and backup generatorswhich are ancillary to mainunits.Approval Clerical changes only.A-II.D.4. A-II.D.5. APEN exemption requestsc. None of the activities submitted as exemption requeststo the Division may be taken by a sourceuntil thecommission has duly adopted the exemptions asrevisions to this Regulation No. 3 and EPA hasApproval Removal of II.D.5.d. and II.D.5.e.eliminates requirements superseded byII.D.5.c.29TSD Table – Colorado APEN Revisionsin the 2007 SIP Submission Relative to the EPA-Approved 1997 Colorado SIPAPENProvisions No. in2007 RevisedColorado SIPAPENProvisions No. inEPA-Approved 1997Colorado SIPProvisions Description/Language Changes:Underlined Text: Language additions/changes withrespect to the EPA-approved provisions as of 1/21/1997.Strikethrough: Language deletions from the 1997 EPAapproved SIP.EPA’sProposedActionEPA’s Comments (if applicable, seefootnote)approved the exemption requests.d.The Division will annually submit the list of requestedexemptions to the Commission for adoption and theEPA for approval, along with the Division’spreliminary determination of the appropriateness ofeachrequest for exemption.e. In order to be made a part of the Division’s annualsubmission in a particular year, a source must submitits request(s) for exemption along withall the requireddocumentation supportingsuch request, no later thanAugust 1 of that year.A-II.D.5. A-II.D.6. Commercial laboratories.Approval Clerical changes and renumbering. Nosignificant changes.A-II.D.6. A-II.D.7. Research and development activities.Approval Renumbering.The language of the provision wasretained.