NAAQS and Criteria NAAQS and Criteria Pollutant Pollutant

Trends UpdateTrends Update

US EPA Region 10US EPA Region 10

OverviewOverview Clean Air Act - Sections 108 and 109Clean Air Act - Sections 108 and 109

– Govern the establishment and revision of Govern the establishment and revision of the National Ambient Air Quality the National Ambient Air Quality Standards (NAAQS)Standards (NAAQS)

– CAA requires periodic review of the CAA requires periodic review of the science upon which the standards are science upon which the standards are based and the standards themselvesbased and the standards themselves

NAAQS Review ProcessNAAQS Review Process Status of NAAQS with pollutant trendsStatus of NAAQS with pollutant trends

Ozone NAAQS UpdateOzone NAAQS Update On March 12, 2008, EPA established new

primary and secondary NAAQS for ground level ozone at 0.075 ppm.

The process of designating areas at attainment or nonattainment was on schedule to be completed by March 12, 2010.

Several environmental organizations and industry groups petitioned the DC Court of appeals to review the 2008 NAAQS.

Ozone NAAQS UpdateOzone NAAQS Update On Sept 15th, EPA announced that we will reconsider the

2008 standards for ground-level ozone to ensure the standards are clearly grounded in science and protect public health and welfare with an adequate margin of safety

The ozone standards set in 2008 were not as protective as recommended by EPA’s panel of science advisors– Recommended 0.060-0.070 ppm for primary standards– Recommended the W126 index for secondary standards

The Agency will propose any needed revisions to the ozone standards by December 2009 and issue a final decision by August 2010. We will work with our states to accelerate the implementation of any new standards.

Puget Sound Ozone SitesPuget Sound Ozone Sites

WA OzoneWA Ozone TrendsTrends

Puget Sound Ozone Design Values - 4th high

0.0680.071

0.0730.071

0.0740.072

0.076

0.04

0.05

0.06

0.07

0.08

00-02 01-03 02-04 03-05 04-06 05-07 06-08

Lk Samm. Mt Rainier Mud Mtn N Bend Pack Forest Yelm

WA Ozone TrendsWA Ozone Trends

Weyerhauser/Mud Mtn O3 DVs

0.060

0.070

0.080

0.090

90-92 92-94 94-96 96-98 98-00 00-02 02-04 04-06 06-08

Mud Mtn 4th Poly. (Mud Mtn 4th)

Weyerhauser Mud Mtn

WA OzoneWA Ozone TrendsTrends

Non-PS Ozone Design Values - 4th high

0.050

0.060

0.070

0.080

0.090

00-02 01-03 02-04 03-05 04-06 05-07 06-08

Spokane Cheney Wishram Vancouver

WA Ozone SummaryWA Ozone Summary

Mud Mtn appears to be trending upMud Mtn appears to be trending up Pack Forest flat but mimics Mud MtnPack Forest flat but mimics Mud Mtn Vancouver up, down, and up againVancouver up, down, and up again Other WA sites trending downOther WA sites trending down

PMPM2.52.5 NAAQS Update NAAQS Update

PMPM2.52.5 Final Designations for 2006 24 hour Final Designations for 2006 24 hour NAAQS ongoingNAAQS ongoing

– Originally had 7 areas; now will have 5 areasOriginally had 7 areas; now will have 5 areas

– One site in WA in Pierce County based on L Street One site in WA in Pierce County based on L Street monitor in Tacomamonitor in Tacoma

– SIP’s will be due 3 years from now and SIP’s will be due 3 years from now and attainment of standards in less than 5 yearsattainment of standards in less than 5 years

– Next NAAQS for PMNext NAAQS for PM2.52.5 review due out in early review due out in early 20112011

Washington PMWashington PM2.52.5 Trends Trends

WA PM2.5 Design Values (all sites)

18

36

54

72

00-02 01-03 02-04 03-05 04-06 05-07 06-08

Beacon Hill Duwamish Marysville Spokane

Tacoma Darrington Vancouver Yakima

Red = NAAQS violation

WA PMWA PM2.52.5 Summary Summary Washington sites are fairly flat, though..Washington sites are fairly flat, though..

– Tacoma trending upTacoma trending up– Marysville is trending downMarysville is trending down– Most areas show high reads due to wood Most areas show high reads due to wood

combustion during winter coupled with combustion during winter coupled with stagnation conditionsstagnation conditions

SIP is due for the WA State NAA in Pierce SIP is due for the WA State NAA in Pierce County 3 years from effective date County 3 years from effective date

NONO22 NAAQS NAAQS On June 26, 2009 EPA proposed to strengthen the primary NAAQS

for nitrogen dioxide (NO2) from the existing NO2 standard of an annual average of 53 parts per billion (ppb).

EPA is proposing to:– add a 1-hour NO2 standard at a level between 80-100 ppb; and– retain an annual average NO2 standard at a level of 53 ppb

Under a separate review, EPA is considering the need for changes to the secondary NO2 standard

EPA is also proposing changes to the NO2 air quality monitoring network including monitors to measure:– Peak, short-term concentrations to support the proposed 1-hour

standard – typically near major roads in urban areas, and– highest concentrations of NO2 that occur over wider areas

The public comment period ended this month and final rule will be out Jan 2010.

NO2 Monitoring SitesNO2 Monitoring Sites

NO2 NAAQS TrendsNO2 NAAQS Trends

NO2 3-yr DV (based on annual 4th high 1-hr value)

0 20 40 60 80 100 120 140

03-05

04-06

05-07

06-08

March Pt

Seattle

Portland

Hayden

1.5 – 3.3 miles from site to sources

Lead Pb NAAQSLead Pb NAAQS New standard finalized in FR on 11/12/08New standard finalized in FR on 11/12/08 0.15 0.15 µg/m3 or less meets standardµg/m3 or less meets standard

– Mean value averaged over 3 monthsMean value averaged over 3 months– Look at 3 years of data to determine Look at 3 years of data to determine

compliancecompliance

Pb monitoring in R10 stopped as of 2003.Pb monitoring in R10 stopped as of 2003.– Last exceedance was 2Last exceedance was 2ndnd quarter 1998 quarter 1998 – Harbor Island, Seattle - 2.03 µg/m3Harbor Island, Seattle - 2.03 µg/m3– Source has since shut down operationsSource has since shut down operations

Therefore unclear how R10 will be effectedTherefore unclear how R10 will be effected

CO NAAQSCO NAAQS Standard review ongoing under the Standard review ongoing under the

following schedule:following schedule:– Final Integrated Review Plan - August 2008 – Scope and Methods for Risk/Exposure

Assessment - April 2009 – Final Integrated Science Assessment -

January 2010– Final Risk and Exposure Assessment – May

2010– Proposed/Final rulemaking – October 2010/

May 2011

Carbon Monoxide TrendsCarbon Monoxide Trends

8 hour standard is 9 ppm – not to be 8 hour standard is 9 ppm – not to be exceeded more than 1x/yearexceeded more than 1x/year

1 hour standard is 35 ppm - not to be 1 hour standard is 35 ppm - not to be exceeded more than 1x/yearexceeded more than 1x/year

Network has been drastically Network has been drastically reducedreduced

No violation of either standard in R10 No violation of either standard in R10 in the 21 century through CY 2008.in the 21 century through CY 2008.

CO TrendsCO Trends

Carbon Monoxide - 8hr Std, 2nd Max

0

3

6

9

12

15

2000 2001 2002 2003 2004 2005 2006 2007 2008

Anc/Trinity

Anc/Turnagain

Anchorage/L St

Eagle River

Fbnks/Fed Bldg

Fbnks/Hunter ES

Boise

Medford

Eugene

SE Portland

SW Portland

Bellevue

Seattle

Spokane

CO TrendsCO Trends

Carbon Monoxide - 1 hr Std, 2nd Max

0

10

20

30

40

2000 2001 2002 2003 2004 2005 2006 2007 2008

Anc/Trinity

Anc/Turnagain

Anchorage/L St

Eagle River

Fbnks/Fed Bldg

Fbnks/Hunter ES

Boise

Medford

Eugene

SE Portland

SW Portland

Bellevue

Seattle

Spokane

SOSO22 NAAQS NAAQS

Standard review ongoing under the Standard review ongoing under the following schedule:following schedule:– Final Integrated Review Plan - October

2007 – Final Integrated Science Assessment -

September 2008 – Final Risk/Exposure Assessment

methodology - January 2009 – Policy/Final rulemaking - March 2010

QuestionsQuestions