Transcript Slide 1

Ozone Planning and
SIP Development Status
Public Meeting – Aurora Central Library
August 14, 2008
Ground-Level Ozone Pollution
• Secondary air pollutant formed in the
atmosphere through reaction of:
 Volatile Organic Compounds (VOC)
 Nitrogen Oxides (NOx)
• Prime conditions for ozone formation
 Intense sunlight, high temperatures, persistent
high pressure systems, light winds & little moisture
• Ozone can trigger attacks & symptoms in
individuals with pre-existing health
conditions, as well as healthy individuals.
 Asthma affects more than 89,000 children between
the ages of 1 and 14 in Colorado
Ozone Formation
Understanding Where
Ozone Comes From
• Anthropogenic sources (man-made)
 Approximately 500 tons per day VOCs
 Approximately 400 tons per day NOx
History
• EPA established more stringent 8-hour
ozone standard in 1997
• Early Action Compact with EPA – 2002
• Ozone Action Plan – 2004
• Region violated 8-hour standard in 2007
based on 2005-2007 3-year average
• EPA designated the Denver/NFR region
nonattainment in November 2007
• Region must submit a new ozone plan (SIP)
to EPA by July 1, 2009
Planning Overview
• Strategy evaluation and development
 First round of strategy analysis nearing completion
 RAQC has approved strategies to include in draft plan
• Photochemical air quality modeling
 Preliminary 2006/2010 base case modeling complete
 Sensitivity and source apportionment modeling
underway
 Proposed control package(s) modeling in August
• Stakeholder involvement
 Over 40 stakeholder and public meetings
• Proposed Ozone Action Plan and SIP
 Draft plan for board and public review by August 1
 Proposal to AQCC in September
 AQCC adoption in December
 Legislative review during 2009 session
VOC Emission Inventory~450 tpd
NOx Emission Inventory~336 tpd
2010 NAA NOx
Other O&G Area
3 t/d
1%
Compressor
Engines (APEN)
7%
24 t/d
Non-O&G Points
(APEN)
26%
Exempt engines
8 t/d 2%
86 t/d
Non O&G Area
22 t/d 7%
Non-Road Sources
18%
61 tpd
Drill rigs
12 t/d 3%
Mobile Sources
(Highway)
36%
120 t/d
Proposed SIP Strategies
1) More stringent I/M cutpoints (Denver area)
2) 7.8 RVP gasoline in NFR (same as Denver
area)
3) Increase condensate tank control
requirements – 95% on all tanks >10 tpy
4) Pneumatic valve controller replacements
5) Expand Reg. 7 (VOC point source control)
to entire NAA
6) Remove exemptions for sources to file
APENs and obtain permits
7) Require RACT for minor point sources in
entire NAA
Proposed State-Only Strategies
1)
2)
3)
4)
I/M program in North Front Range
High-emitter pilot program (Denver area)
Tighten collector plate requirements
Control requirements for smaller O&G
condensate tanks – 95% control for tanks >
2tpy
5) Statewide oil & gas regulations – internal
combustion engines
Strategies For Further Review
1) Ozone Fuels Strategies
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•
•
Lower RVP gasoline (7.0 RVP)
Federal Reformulated Gasoline
Eliminate ethanol waiver
2) Controls on larger NOx sources
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•
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Power plants
Boilers
Cement kilns
3) Statewide oil & gas controls for new
condensate tanks and pneumatic valves
4) CA Paints/Solvents/Consumer Products
rule
Emission Reductions
Reduction 2006-2010
Federal programs (motor vehicles,
nonroad engines, refueling vapor
recovery, paints & solvents)
Local mobile source controls (I/M
cutpoints, NFR RVP)
Oil & Gas Regulations (condensate
tanks, pnematic valves, engines)
Total Reductions
VOC
NOx
35 tpd
53 tpd
5 tpd
4 tpd
110 tpd
na
150 tpd
57 tpd
Emission Budgets
• Motor vehicle emissions budgets for VOC
and NOx will be established based on 2010
attainment inventory
• Considering two subarea budgets
Denver Metro Area (including southern Weld
Co.)
North Front Range
• Separate conformity determinations by
DRCOG and NFRMPO based on their
subarea budgets
Conformity Subareas
Next Steps
• Draft SIP available on ozoneaware.org
• Public meetings
 August 20 – RAQC Board meeting – 3:00 p.m.
• RAQC approval of proposed SIP – Sept. 8
• RAQC proposes SIP to Air Quality Control
Commission – September 18
• AQCC public hearing and SIP adoption
New 8-Hour Ozone Standards
• Final standards announced by EPA
Administrator on March 12
• EPA concluded 1997 standards were
not adequate to protect public health
and welfare
• Lowered primary and secondary
standards to 0.075 ppm
• Maintained current form of standards
8-hour averaging period
3-year average of annual 4th maximum 8-hour
values at each monitoring site
Implementation Schedule
• Nonattainment designations
 State recommendations by March 2009
» Based on 2006-2008 ozone data
 EPA makes final designations by March 2010
» Based on 2007-2009 ozone data
• Attainment SIPs
 Due by March 2013 (3 years after final designations)
• Attainment Dates
 2013-2030 depending on severity of problem and
classification
 Classifications will be addressed by future EPA
rulemaking
1997 Ozone Standards
• For now, 1997 8-hour ozone standards
and all the associated regulatory
requirements remain in place
• States and nonattainment areas should
continue their plans for implementing
the 1997 standards
• EPA will address transition issues from
the 1997 standards to the 2008
standards in a separate rulemaking
Days Above .075 ppm
(Denver/North Front Range Area)
Number of Days
50
40
30
20
10
0
2000 2001 2002 2003 2004 2005 2006 2007 2008
>75 ppb
>84 ppb