1 designations & classifications for the 8-hour ozone naaqs u.s. epa office of air quality...
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Designations & Designations & Classifications for the Classifications for the 8-hour Ozone NAAQS8-hour Ozone NAAQS
U.S. EPAU.S. EPA
Office of Air Quality Office of Air Quality Planning and StandardsPlanning and Standards
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Here’s what we’ll coverHere’s what we’ll cover
Brief background Brief background How How designationsdesignations and and
classificationsclassifications were were determineddetermined
A national look A national look Determining nonattainment Determining nonattainment
boundariesboundaries 11 factors 11 factors Where to find more Where to find more
informationinformation
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What is a nonattainment area?What is a nonattainment area?
““. . . any area that does not . . . any area that does not meet meet (or that contributes to (or that contributes to ambient air quality in a ambient air quality in a nearby area that does not nearby area that does not meet) meet) the NAAQS”the NAAQS”
CAA CAA §107(d)(1)(A)(i)§107(d)(1)(A)(i)
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• 1-hr, .12 ppm ozone standard 1-hr, .12 ppm ozone standard promulgated in 1979. promulgated in 1979.
• 8-hr, .08 ppm ozone standard 8-hr, .08 ppm ozone standard promulgated in 1997.promulgated in 1997.
• Final 8-hr. designations & Final 8-hr. designations & classifications signed on 4/15/04 classifications signed on 4/15/04 (published 4/30/04 in 69 FR 23858).(published 4/30/04 in 69 FR 23858).
Background & historyBackground & history
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Background & history (con’d)Background & history (con’d)
• 8-hr. classification scheme originates 8-hr. classification scheme originates in April 2004 implementation rule.in April 2004 implementation rule.
• Based on the 1-hr approach.Based on the 1-hr approach.
• Control requirements tied to the Control requirements tied to the applicable subpart and the area’s applicable subpart and the area’s classification.classification.
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How were 8-hour designations How were 8-hour designations and classifications determined?and classifications determined?
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Violating the 8-hr? Violating the 8-hr? ((>>.085 ppm).085 ppm)
yesyes
Was area’s 1-hr. dv Was area’s 1-hr. dv >> .121 ppm? .121 ppm?
If no: Subpart 1If no: Subpart 1If yes: Subpart 2If yes: Subpart 2
8-hr classification8-hr classificationMarginalMarginalModerateModerateSeriousSeriousSevereSevere
ExtremeExtreme
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CAA Table 181 Conversion
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CATEGORY/CLASSIFICATION
Severe 17 Los Angeles
Moderate
Marginal
Subpart 1 (Basic)
Subpart 1 EAC (Basic)
Moderate EAC Greensboro, NC
Classification of 8-hour Nonattainment Ozone Areas
Serious - Riverside Co (Coachella Valley), San Joaquin, Sacramento, CA
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How the areas sorted outHow the areas sorted out
• 71 subpart 1 “Basic” areas*71 subpart 1 “Basic” areas* Generally below .121 ppm (1-hr.)Generally below .121 ppm (1-hr.) FlexibilityFlexibility
• 41* subpart 2 areas41* subpart 2 areas Have a classificationHave a classification Mandated controls Mandated controls
*Excludes EAC areas*Excludes EAC areas
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National summaryNational summary
474 counties 474 counties designateddesignated
nonattainmentnonattainment 432 whole counties432 whole counties 42 partial counties42 partial counties
~159 million live in ~159 million live in these areasthese areas
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CATEGORY/CLASSIFICATION AREAS COUNTIES
Severe 17 1 4 Serious 3 15 Moderate 30 185 Marginal 7 55Subpart 2 41 255
Subpart 1 71 172
SUBTOTAL: 112 425
Moderate EAC 1 8 Subpart 1 EAC 13 41
SUBTOTAL: 14 49
GRAND TOTAL 126 474
A closer look . . . .A closer look . . . .
*
* Does not equal sum of parts as some counties are split into two classifications.
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9 Reclassifications – 9 Reclassifications – all Moderate to Marginalall Moderate to Marginal
Effective November 22, 2004:Effective November 22, 2004:• Cass Co., MICass Co., MI• Muskegon Co., MIMuskegon Co., MI• DetroitDetroit• Greensboro, NCGreensboro, NC• Kent/Queen Anne Cos., MDKent/Queen Anne Cos., MD• Lancaster, PALancaster, PA• LaPorte, INLaPorte, IN• Memphis Memphis • Richmond, VARichmond, VA
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Attainment DatesAttainment Dates
• Subpart 1 areas have 5 -10 yearsSubpart 1 areas have 5 -10 years• Subpart 2: based on classificationSubpart 2: based on classification
Marginal – 3 Marginal – 3 Moderate – 6 Moderate – 6 Serious – 9 Serious – 9 Severe – 15 Severe – 15 Extreme – 20 Extreme – 20
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How were nonattainment How were nonattainment boundaries determined?boundaries determined?
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Starting point: C/MSA11 factors to determine whether
to exclude a county
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11 factors (con’d)
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How designation and classification How designation and classification affect an areaaffect an area
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Where can I find more information?Where can I find more information?
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Green BookGreen Book …
http://www.epa.gov/oar/oaqps/greenbk/o8index.html
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Early Action Early Action Compacts for 8-hr Compacts for 8-hr
Ozone NAAQSOzone NAAQS
U.S. EPAU.S. EPA
Office of Air Quality Planning Office of Air Quality Planning and Standardsand Standards
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What are Early Action Compacts What are Early Action Compacts (EACs)?(EACs)?
What are EAC areas required to What are EAC areas required to do?do?
Where are EAC areas located?Where are EAC areas located?What innovative measures are What innovative measures are
planned?planned?
What does this presentation What does this presentation cover?cover?
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What are EACs?What are EACs?
Voluntary agreements – Voluntary agreements – EPA/State/LocalEPA/State/Local
Innovative approach to cleaner airInnovative approach to cleaner airEncourage communities to act early Encourage communities to act early
to reduce ozone sooner than to reduce ozone sooner than requiredrequired
Commit to early SIP, early Commit to early SIP, early implementation implementation
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What are EACs?What are EACs?
EAC areas required to meet EAC areas required to meet certain milestonescertain milestones
Area designated nonattainment Area designated nonattainment with deferred effective datewith deferred effective date
Nonattainment area requirements Nonattainment area requirements are not applicable if all milestones are not applicable if all milestones metmet
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What is required?What is required?(EAC Milestones)(EAC Milestones)
Agreements signed December Agreements signed December 20022002
Preliminary measures identified Preliminary measures identified June 2003June 2003
Local air quality plan submitted Local air quality plan submitted March 2004March 2004
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What is required?What is required?((EAC Milestones)EAC Milestones)
State submits SIP by December State submits SIP by December 20042004
Control measures implemented in Control measures implemented in 20052005
Progress assessment due 2006Progress assessment due 2006EAC areas must attain 8-hr ozone EAC areas must attain 8-hr ozone
standard by December 2007standard by December 2007
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Compacts approved for 33 areas Compacts approved for 33 areas in 9 States in 9 States
1414 areas received “deferred areas received “deferred nonattainment designation”nonattainment designation”
Deferral extends to September Deferral extends to September 2005 with options for renewal2005 with options for renewal
Where are EAC areas and Where are EAC areas and how many received how many received
“deferrals?“deferrals?
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Specific Examples of Innovative Specific Examples of Innovative Measures in EAC AreasMeasures in EAC Areas
Truck Stop ElectrificationTruck Stop ElectrificationSchool bus/diesel engine retrofitsSchool bus/diesel engine retrofitsUrban Heat Island Reduction/Cool Urban Heat Island Reduction/Cool
CitiesCitiesEnergy Efficiency/Renewable Energy Efficiency/Renewable
EnergyEnergy
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12/31/04 - early SIPs due12/31/04 - early SIPs due 9/30/05 - EPA final action9/30/05 - EPA final actionAreas with approved SIPs Areas with approved SIPs
eligible for continued deferraleligible for continued deferralAreas with disapproved SIPs Areas with disapproved SIPs
designated nonattainmentdesignated nonattainment
What’s next for EAC areasWhat’s next for EAC areas??
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For more information …For more information …
www.epa.gov/ttn/naaqs/ozone/eacwww.epa.gov/ttn/naaqs/ozone/eac
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8-Hour Ozone NAAQS 8-Hour Ozone NAAQS Implementation RuleImplementation RuleFinal Rule—Phase 1 Final Rule—Phase 1
HighlightsHighlights
Office of Air Quality Office of Air Quality Planning and StandardsPlanning and Standards
U.S. Environmental U.S. Environmental Protection AgencyProtection Agency
9/24/04
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Chronology -- 8-hour Ozone Chronology -- 8-hour Ozone Implementation RuleImplementation Rule
Proposed June 2, 2003.Proposed June 2, 2003. Comment period closed August 1, Comment period closed August 1,
2003.2003. Additional comment period on rule Additional comment period on rule
language closed September 5, 2003.language closed September 5, 2003. Re-opened the comment period -- Re-opened the comment period --
additional classification approaches; additional classification approaches; closed November 5.closed November 5.
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Status of 8-hour Ozone Status of 8-hour Ozone Implementation RuleImplementation Rule
Final rule to be issued in 2 phases:Final rule to be issued in 2 phases: Phase 1: Phase 1:
• Classifications, transition/anti-Classifications, transition/anti-backsliding, revocation of 1-hour backsliding, revocation of 1-hour std., attainment dates, attainment std., attainment dates, attainment date extensions, timing of emission date extensions, timing of emission reductions needed for attainmentreductions needed for attainment
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Status of 8-hour Ozone Status of 8-hour Ozone Implementation RuleImplementation Rule
Phase 1 (cont’d)Phase 1 (cont’d)• Signed 4/15/2004Signed 4/15/2004• Published 4/30/2004Published 4/30/2004• Effective 6/15/2004Effective 6/15/2004
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Status of 8-hour Ozone Status of 8-hour Ozone Implementation RuleImplementation Rule
Phase 2: Phase 2: • Remainder of rule elements (e.g., Remainder of rule elements (e.g.,
RACT, RFP, attainment RACT, RFP, attainment demonstrations; 8-hr NSR)demonstrations; 8-hr NSR)
• Planning for signature fall 2004Planning for signature fall 2004
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Separate 8-hour nonattainment Separate 8-hour nonattainment areas based on 1-hr design values areas based on 1-hr design values • < 0.121 ppm -- Subpart 1 < 0.121 ppm -- Subpart 1
(attainment dates 5 or 10 years (attainment dates 5 or 10 years after designation)after designation)
• => than 0.121 ppm -- Subpart 2 => than 0.121 ppm -- Subpart 2 (attainment dates 2007 – 2021)(attainment dates 2007 – 2021)
Classification in Classification in generalgeneral
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Subpart 2 areas (cont’d) – Subpart 2 areas (cont’d) – classifiedclassified using “translated” 8- using “translated” 8-hour design valueshour design values
Subpart 1 areas -- No Subpart 1 areas -- No classification except that rural classification except that rural areas that meet overwhelming areas that meet overwhelming transport criteria will receive transport criteria will receive that classificationthat classification
Classification cont’dClassification cont’d
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Attainment DatesAttainment Dates Attainment “as expeditious as Attainment “as expeditious as
practicable but no later than . . . “ practicable but no later than . . . “ Subpart 2 -- from 6/15/04:Subpart 2 -- from 6/15/04:
• marginal – 3 years (2007)marginal – 3 years (2007)• moderate – 6 years (2010)moderate – 6 years (2010)• serious – 9 years (2013)serious – 9 years (2013)• severe – 15 or 17 years severe – 15 or 17 years
(2019/2021)(2019/2021)• extreme – 20 years (2024)extreme – 20 years (2024)
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Attainment DatesAttainment Dates
Subpart 1 no later than 5 years Subpart 1 no later than 5 years after effective date of after effective date of designation or up to 10 years designation or up to 10 years after designation under certain after designation under certain conditionsconditions
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Revocation of 1-hr std.Revocation of 1-hr std. Complete revocation of 1-hr std.Complete revocation of 1-hr std.
1 year1 year following designations following designations Continued applicability of subpart 2 Continued applicability of subpart 2
requirements requirements Continued air quality improvement,Continued air quality improvement, Focus toward implementation of the 8-Focus toward implementation of the 8-
hour standard.hour standard. Consistent with 1-year grace period for Consistent with 1-year grace period for
8-hr O3 conformity.8-hr O3 conformity.
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Anti-BackslidingAnti-BackslidingEnsures areas continue to Ensures areas continue to
implement control measures implement control measures and planning in their 1-hour and planning in their 1-hour plans after 1-hour std revokedplans after 1-hour std revoked
(cont’d . . . )(cont’d . . . )
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Anti-BackslidingAnti-BackslidingActual rule broken out by kind Actual rule broken out by kind
of area:of area: 8-hr NA area/1-hr NA area8-hr NA area/1-hr NA area 8-hr NA area/1-hr maintenance area8-hr NA area/1-hr maintenance area 8-hr attain. area/1-hr NA area8-hr attain. area/1-hr NA area 8-hr attain. area/1-hr maintenance 8-hr attain. area/1-hr maintenance
areaarea
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Anti-backsliding—duration Anti-backsliding—duration of obligationof obligation
Time subpart 2 measures (e.g., Time subpart 2 measures (e.g., I/M) need to be in place after I/M) need to be in place after the 1-hour standard is revoked:the 1-hour standard is revoked: until an area is redesignated to until an area is redesignated to attainment for the 8-hour attainment for the 8-hour standard.standard.
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Anti-backsliding—duration Anti-backsliding—duration of obligationof obligation
After redesignation to After redesignation to attainment, subpart 2 measures attainment, subpart 2 measures could not be dropped but could could not be dropped but could be recast as contingency be recast as contingency measures with a sect. 110(l) measures with a sect. 110(l) showing of noninterference with showing of noninterference with the 8-hr std.the 8-hr std.
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Anti-backsliding—other Anti-backsliding—other provisionsprovisions
Would also retain Would also retain requirements under NOx SIP requirements under NOx SIP callcall
Other provisions in SIP would Other provisions in SIP would remain but could be revisedremain but could be revised
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1-hr NAAQS Obligations that 1-hr NAAQS Obligations that Don’t Apply after RevocationDon’t Apply after Revocation
Adopting the approach proposed rule Adopting the approach proposed rule with modificationswith modifications
Providing clarification regarding the Providing clarification regarding the penalty obligations under sections penalty obligations under sections 181(b)(4) and 185A of the CAA that 181(b)(4) and 185A of the CAA that apply in severe areas that do not apply in severe areas that do not attain the 1-hour standard by the attain the 1-hour standard by the applicable attainment date. applicable attainment date.
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1-hr NAAQS Obligations that Don’t 1-hr NAAQS Obligations that Don’t Apply after RevocationApply after Revocation
Demonstrate conformity for the Demonstrate conformity for the 1-hour NAAQS 1-hour NAAQS
No findings of failure to attain No findings of failure to attain the 1-hour standard (no more the 1-hour standard (no more bump-ups & no and sect. 185 bump-ups & no and sect. 185 feesfees
(cont’d. . .)(cont’d. . .)
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1-hr NAAQS Obligations that Don’t 1-hr NAAQS Obligations that Don’t Apply after RevocationApply after Revocation
No second 10-year No second 10-year maintenance plan and maintenance plan and obligation to implement obligation to implement contingency measures upon a contingency measures upon a violation of the 1-hour NAAQS.violation of the 1-hour NAAQS.
NSR for 1-hour NAAQS.NSR for 1-hour NAAQS.
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Timeframe for emission Timeframe for emission reductions for attainmentreductions for attainment
If an area needs more than the If an area needs more than the reductions required by RFP in reductions required by RFP in order to demonstrate attainment, order to demonstrate attainment, then any additional reductions then any additional reductions would have to be achieved by would have to be achieved by the the beginning of the ozone beginning of the ozone season prior to the area’s season prior to the area’s attainment date.attainment date.
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WebsitesWebsites
General Implementation site:General Implementation site: http://www.epa.gov/ttn/naaqs/ozone/ohttp://www.epa.gov/ttn/naaqs/ozone/o
3imp8hr/3imp8hr/ Federal Register notice & related Federal Register notice & related
material — phase 1:material — phase 1: http://www.epa.gov/ttn/naaqs/ozone/http://www.epa.gov/ttn/naaqs/ozone/
o3imp8hr/proprule.htmlo3imp8hr/proprule.html
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8-Hour Ozone NAAQS 8-Hour Ozone NAAQS Implementation RuleImplementation RuleFinal Rule—Phase 2 Final Rule—Phase 2
Major Components & Policy Major Components & Policy IssuesIssues
Office of Air Quality Office of Air Quality Planning and StandardPlanning and StandardU.S. Environmental U.S. Environmental Protection AgencyProtection Agency
9/24/04
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Reasonable Further Progress Reasonable Further Progress (RFP)(RFP)
What it’s for – Required to ensure What it’s for – Required to ensure progress toward attainment prior to progress toward attainment prior to attainment dateattainment date
Major Policy IssuesMajor Policy Issues RFP for subpart 1 areas (flexible RFP for subpart 1 areas (flexible
approach or more prescriptive approach)approach or more prescriptive approach) Timing of plan submission & Timing of plan submission &
implementation of measuresimplementation of measures
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Reasonably Available Control Reasonably Available Control Technology (RACT)Technology (RACT)
What it’s for – Ensure minimum What it’s for – Ensure minimum level of emission control level of emission control technology for nonattainment technology for nonattainment areasareas
Major Policy issuesMajor Policy issues RACT for subpart 1 areas (flexible RACT for subpart 1 areas (flexible
approach or more prescriptive approach or more prescriptive approach) (cont’d . . .)approach) (cont’d . . .)
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Reasonably Available Control Reasonably Available Control Technology (RACT)Technology (RACT)
Major Policy issues (cont’d)Major Policy issues (cont’d) Subpart 2 RACTSubpart 2 RACT
• Use of Previous GuidanceUse of Previous Guidance• Effect of NOx SIP call coverageEffect of NOx SIP call coverage
Timing of plan submission & Timing of plan submission & implementation of measuresimplementation of measures
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Attainment demonstrations & Attainment demonstrations & photochemical grid modelingphotochemical grid modeling
What it’s for – State must What it’s for – State must demonstrate analytically that demonstrate analytically that emission reductions over time emission reductions over time will achieve the NAAQS by will achieve the NAAQS by the attainment date (cont’d . . the attainment date (cont’d . .
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Attainment demonstrations & Attainment demonstrations & photochemical grid modelingphotochemical grid modeling
Major Policy Issues Major Policy Issues Timing of submissionTiming of submission Which subpart 1 areas need to Which subpart 1 areas need to
submit modeled attainment submit modeled attainment demonstrationsdemonstrations
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Long-range TransportLong-range TransportWhat’s the problem – Many areas What’s the problem – Many areas
cannot attain the standard cannot attain the standard through only local control but through only local control but must rely on controls from upwind must rely on controls from upwind areasareas
Major Policy Issue – How should Major Policy Issue – How should EPA address this problem?EPA address this problem?
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New Source ReviewNew Source Review
What it’s for – Ensure that new What it’s for – Ensure that new sources locating in a sources locating in a nonattainment area will not nonattainment area will not interfere with attainment or interfere with attainment or progress toward attainmentprogress toward attainment
Major Policy Issue – How to Major Policy Issue – How to structure existing NSR rule to structure existing NSR rule to address the 8-hour standard.address the 8-hour standard.
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Flexibility for Mandatory Flexibility for Mandatory Measures under subpart 2Measures under subpart 2
Major Policy Issue – Can Major Policy Issue – Can EPA allow waivers for EPA allow waivers for subpart 2 mandatory subpart 2 mandatory measures?measures?
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Once again--WebsiteOnce again--Website
General Implementation site:General Implementation site: http://www.epa.gov/ttn/naaqs/ozone/ohttp://www.epa.gov/ttn/naaqs/ozone/o
3imp8hr/3imp8hr/
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New Source Review New Source Review under theunder the
8-hour Ozone NAAQS 8-hour Ozone NAAQS
U.S. EPAU.S. EPA
Office of Air Quality Office of Air Quality Planning and StandardsPlanning and Standards
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What does this presentation What does this presentation cover?cover?
NSR in Phase II Ozone NSR in Phase II Ozone Implementation RuleImplementation Rule
Implementing NSR Under the 8-Implementing NSR Under the 8-hour Ozone NAAQShour Ozone NAAQS
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Nonattainment NSR in Nonattainment NSR in Phase II Ozone Phase II Ozone
Implementation RulesImplementation Rules
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NSR in Phase II RuleNSR in Phase II Rule
Changing nonattainment major Changing nonattainment major NSR rules to implement the 8-hour NSR rules to implement the 8-hour ozone NAAQS.ozone NAAQS.
Changes to SIP rules (Changes to SIP rules (§§51.165) 51.165) and to Appendix S.and to Appendix S.
Expected promulgation: Fall 2004.Expected promulgation: Fall 2004.
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What will the Phase II rule What will the Phase II rule include?include?
Major Stationary Source Thresholds Major Stationary Source Thresholds Significant Emission Rates Significant Emission Rates Offset RatiosOffset Ratios NOx as an Ozone Precursor in NOx as an Ozone Precursor in
Ozone Nonattainment AreasOzone Nonattainment Areas Final Action on Transitional NSR Final Action on Transitional NSR
Program Proposed June 2003Program Proposed June 2003
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Requirements in Subpart 1 Requirements in Subpart 1 (Basic) Areas (Basic) Areas
Major Stationary Major Stationary Source ThresholdSource Threshold
100 tpy VOC/NOx100 tpy VOC/NOx
Significant Significant Emission RateEmission Rate
40 tpy VOC/NOx40 tpy VOC/NOx
Offset RatioOffset Ratio At least 1:1At least 1:1
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Major Stationary Source Major Stationary Source Subpart 2 AreasSubpart 2 Areas
MarginalMarginal 100 tpy VOC/NOx100 tpy VOC/NOx
ModerateModerate 100 tpy VOC/NOx100 tpy VOC/NOx
SeriousSerious 50 tpy VOC/NOx50 tpy VOC/NOx
Severe 15/17Severe 15/17 25 tpy VOC/NOx25 tpy VOC/NOx
ExtremeExtreme 10 tpy VOC/NOx10 tpy VOC/NOx
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Significant Emission Rate Significant Emission Rate Subpart 2 AreasSubpart 2 Areas
MarginalMarginal 40 tpy VOC or NOx40 tpy VOC or NOx
ModerateModerate 40 tpy VOC or NOx40 tpy VOC or NOx
SeriousSerious 25 tpy VOC or NOx25 tpy VOC or NOx
Severe 15/17Severe 15/17 25 tpy VOC or NOx25 tpy VOC or NOx
ExtremeExtreme Any increaseAny increase
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Offset Ratios Offset Ratios Subpart 2 AreasSubpart 2 Areas
MarginalMarginal At least 1.1:1At least 1.1:1
ModerateModerate At least 1.15:1At least 1.15:1
SeriousSerious At least 1.2:1At least 1.2:1
Severe 15/17Severe 15/17 At least 1.3:1At least 1.3:1
ExtremeExtreme At least 1.5:1At least 1.5:1
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Implementing NSR Implementing NSR Under the 8-hr Ozone Under the 8-hr Ozone
NAAQSNAAQS
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When do the ozone NAAQS When do the ozone NAAQS apply? apply?
1-hr NAAQS revoked June 15, 2005.1-hr NAAQS revoked June 15, 2005.
8-hr NAAQS effective June 15, 2004.8-hr NAAQS effective June 15, 2004.
From June 15, 2004 through June From June 15, 2004 through June 14, 2005, designations and 14, 2005, designations and classifications for both 1-hr and 8-hr classifications for both 1-hr and 8-hr NAAQS will apply in some areas.NAAQS will apply in some areas.
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Nonattainment AreasNonattainment Areas
1-hour 8-hour
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What about NSR SIPs?What about NSR SIPs?
Approved NSR SIP at permit Approved NSR SIP at permit issuance determines permit issuance determines permit terms.terms.
If no approved SIP applying to If no approved SIP applying to nonattainment area, States or nonattainment area, States or EPA will issue permits meeting EPA will issue permits meeting conditions in Appendix S.conditions in Appendix S.
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What about NSR SIPs?What about NSR SIPs?
States not required to keep NSR SIP States not required to keep NSR SIP that applied under the 1-hr standard that applied under the 1-hr standard once 1-hr standard revoked.once 1-hr standard revoked.
Instead, States must establish an 8-Instead, States must establish an 8-hr NSR SIP program based on 8-hr hr NSR SIP program based on 8-hr ozone designation and classification. ozone designation and classification.
States must submit and EPA must States must submit and EPA must approve 8-hr NSR SIPs before they approve 8-hr NSR SIPs before they apply. apply.
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What about NSR permits?What about NSR permits?
Existing permits issued under the Existing permits issued under the 1-hr NSR SIP remain in force.1-hr NSR SIP remain in force.
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When does 1-hr NSR stopWhen does 1-hr NSR stop
applyingapplying?? New Source- see approved NSR SIPNew Source- see approved NSR SIP..
In some areas, requirements cease In some areas, requirements cease to apply when 1-hr standard to apply when 1-hr standard revoked. revoked.
In other areas, need SIP revision In other areas, need SIP revision before requirements no longer before requirements no longer apply.apply.
Permits issued under the 1-hr NSR Permits issued under the 1-hr NSR SIP remain in force.SIP remain in force.
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What about 1-hr permits?What about 1-hr permits?
20032003 20062006
NAAQSNAAQS 1-hr1-hr 8-hr8-hr
ClassificationClassification seriousserious moderatemoderate
Major SourceMajor Source 50 tpy50 tpy 100 tpy100 tpy
PTE VOCPTE VOC 79 tpy79 tpy 79 tpy79 tpy
LAERLAER 18.62 18.62 lb/hrlb/hr
18.62 18.62 lb/hrlb/hr
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When does NSR apply in 8-hr When does NSR apply in 8-hr areas?areas?
8-hr nonattainment NSR began 8-hr nonattainment NSR began applying on June 15, 2004. applying on June 15, 2004.
Many States already have an approved Many States already have an approved NSR SIP that applies in 8-hr ozone NSR SIP that applies in 8-hr ozone nonattainment areas.nonattainment areas.
If no approved nonattainment NSR If no approved nonattainment NSR program that applies to 8-hr ozone program that applies to 8-hr ozone nonattainment area, the State or EPA nonattainment area, the State or EPA will issue preconstruction permits will issue preconstruction permits under 40 CFR Part 51, Appendix S.under 40 CFR Part 51, Appendix S.
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How does NSR apply inHow does NSR apply in 1-hr/8-hr nonattainment areas? 1-hr/8-hr nonattainment areas?
Approved NSR SIP remains in place Approved NSR SIP remains in place until SIP revision approved. until SIP revision approved.
NSR SIP may not need revision to NSR SIP may not need revision to apply to 8-hr designations and apply to 8-hr designations and classifications. classifications.
6-15-04 through 6-14-05, both 1-hr and 6-15-04 through 6-14-05, both 1-hr and 8-hr NAAQS are in effect and permits 8-hr NAAQS are in effect and permits must be issued according to the higher must be issued according to the higher classification that applies.classification that applies.
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What if 2 classifications apply?What if 2 classifications apply?
1-hr1-hr
SeriousSerious
50 tpy major source50 tpy major source
≥ ≥ 1.2:1 offsets1.2:1 offsets
8-hr8-hr
ModerateModerate
100 tpy major source100 tpy major source
≥ ≥ 1.15:1 offsets1.15:1 offsets
Permit before Permit before 6-15-056-15-05
based on:based on:
50 tpy major source50 tpy major source
≥ ≥ 1.2:1 offsets1.2:1 offsets
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