Air Toxics Air Toxics Federal Federal NESHAPs Title III of - - PowerPoint PPT Presentation

Air Toxics

• Federal –

Air Toxics

Federal

– NESHAPs Title III of Clean Air Act Amendments of 1990 – Title III of Clean Air Act Amendments of 1990

• Key elements
• Key elements

– 189 new air toxics MACT H – MACT, Hammers – Expanded EPA authority to add new categories categories

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Air Toxics Air Toxics

• Major source –

Major source

– 10 tpy of any HAP 25 tpy combined HAP – 25 tpy combined HAP – “Once in, always in” Area sources – Area sources

• Source categories (166 major, 8 area)
• MACT

– 12% best performing existing units

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Air Toxics Air Toxics

• Effects Screening Levels

Effects Screening Levels B

• Benzene
• Butadiene
• Air Pollutant Watch List

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Effects Screening Levels Effects Screening Levels

• New guidelines November 2006

New guidelines November 2006

– External scientific peer review by panel of international experts – Two rounds of public comments

• Used in air permitting and for evaluating air

monitoring data.

• Currently, 28 ESLs have been derived using the

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new process.

Benzene Benzene

• Risk-driver for Texas and U.S.
• Wide variety of emission sources
• Wide variety of emission sources
• Representative of other chemicals
• In 2008, no monitors in Harris County were

above the long-term ESL for benzene All it i th H t R i h d

• All monitors in the Houston Region showed a

decrease in average benzene concentration from 2005-2008

• 87% of the monitors statewide showed a

decrease in average benzene concentration from 2005-2008

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from 2005 2008

2008 Average Benzene Concentrations at Air Monitoring Sites in Texas

(Values shown are arithmetic means of 5329 to 7594 hourly autoGC measurements where available*; otherwise arithmetic means of 45 to 61 canister samples.)

2.0 2.1

# Incomplete sampling year Dallas, Boys Club site was not included due to being deactivated in February 2008 Beaumont, Carroll Street Park was deactivated on July 30, 2008 P d N th ti t d J l 1 2008

1 5 1.6 1.7 1.8 1.9

Pasadena North was activated on July 1, 2008 Shore Acres; El Paso, Chamizal; Houston, Clinton Dr.; Danciger; and Houston, Milby Park had less than 75% data return in 2008

1.1 1.2 1.3 1.4 1.5 ntration (ppbv)

TCEQ Long-Term Effects Screening Level (ESL) = 1.4 ppbv

0.7 0.8 0.9 1.0 Benzene Concen

# # #

0 2 0.3 0.4 0.5 0.6

# # # #

0.0 0.1 0.2

y Service Center xas City, 11th St. Galena Park Longview Lynchburg Ferry ton, Jacinto Port Groves Pasadena North agosa St. Bridge sti, Huisache St. , Carroll St. Park xas City, 31st St. El Paso, Womble Paso, Sun Metro Manchester as City, Ball Park * Channelview Port Arthur, West Shore Acres Paso, Chamizal Baytown erson Co. Airport Christi, Hillcrest Aldine Karnack County, Tomball n, Cesar Chavez Port Neches Washington St. ston, Clinton Dr.

• nt, Lamar Univ.

ston, Haden Rd. * Deer Park hristi, Dona Park Christi, Oak Park nio, Old Hwy. 90 Webberville Rd. and High School Mission * Odessa, Hays

• n, Bayland Park

uston, Milby Park * Liverpool

• nroe, Relocated

Edinburg dessa, Gonzales Brownsville n, Wallisville Rd. Clute sti, Solar Estates Greenville xas City, 34th St. ian, Old FW Rd. Denton Airport S. Kaufman vine, Fairway Dr. Italy Dallas, Hinton St. lveston, 99th St. * Ft. Worth, NW * Lake Jackson * Danciger

#

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Port Arthur, City * Tex * Houston, L Houst P Laredo, Zara Corpus Chri Beaumont, * Tex E El P Texa P * El Port Arthur, Jeffe Corpus NW Harris C * Houston Laredo, * Hou * Beaumo * Hous Corpus Ch * Corpus C San Anton Austin, * Nederla Housto * Hou Co * Od * Baytown * Corpus Chris * Tex Midloth D Grapev * D Ga

Annual Average Benzene Levels at Selected Harris and Galveston County Sites, 2005-2008

(based on hourly autoGC data if available*; otherwise every-sixth-day 24-hour canister data) 3 5 3.0 3.5 2005 2006 2007 2008

% - Percent reduction for each year compared to 2005 Clinton and Milby Park had less than 75% data return in 2008

2.0 2.5 entration (ppbv)

25% %12%

1.0 1.5 Benzene Conce

52% 65% 20% 33% 2% % % 25% 31% 22% %

0.0 0.5

29% 28% 49% 44% 38% 9% 28% 42% 20% 12% 33% 32% 7% 12% 19% 23% 27% 17% 47% 26% 73% 11% 11% 64% 13% 17%

• 3%

27% 16% 13% 26% 5% 38% 6% 34% 3% 13% 32% 2% 6%

• 19%

29% 19% 11% 16% 29% 25%

0.0 Lynchburg Ferry Galena Park Manchester Shore Acres x City, Ball Park *Haden Rd *Clinton Dr *Deer Park W Harris County, Tomball *Cesar Chavez Aldine xas City, 34th St Clute Bayland Park *Milby Park *Mustang Bayou *Wallisville *Danciger *Lake Jackson

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*L Tx NW *Tex *

Annual Average 1,3-Butadiene Levels at Harris and Galveston County Sites, 2005-2008

(based on hourly autoGC data if available*; otherwise every-sixth-day 24-hour canister data) 2.0

2005 1 3-Butadiene ppbv

# - Incomplete year of sampling

1.6 1.8

2005 1,3 Butadiene ppbv 2006 1,3-Butadiene ppbv 2007 1,3-Butadiene ppbv 2008 1,3-Butadiene ppbv

Clinton, Danciger, Deer Park, and Milby Park had less than 75% data return in 2008 Galveston Airport and Channelview North were deactivated in 2007. Jacintoport was activated in 2006. Galveston 99th was activated in 2007.

1.2 1.4 ntration (ppbv) TCEQ Long-Term Effects Screening Level = 9.1 ppbv 0.8 1.0 Butadiene Conce

#

0 2 0.4 0.6 1,3-B

# # #

0.0 0.2

*Milby Park *Channelview Cesar Chavez nchburg Ferry *Haden Rd Manchester *Clinton Dr Galena Park Baytown *Deer Park Aldine *Wallisville Shore Acres nelview, North Jacintoport s City, 34th St Lake Jackson ustang Bayou City, Ball Park Clute Bayland Park Nessler Pool *Danciger unty, Tomball veston Airport

• n 99th Street

# # # # #

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* *C *Lyn Chann *Texas *L *Mu Tx C Texas City, NW Harris Co Galv Galvesto

Air Pollutant Watch List

• Currently, there are

12 APWL i 11 12 APWL areas in 11 counties O th l t 2

• Over the last 2 years,

6 pollutants have been removed been removed

• 7 more pollutants in 5

APWL areas are

Number of Chemicals on the Air Pollutant Watch List 25 30

APWL areas are proposed to be removed later this

15 20

• f Chemicals at a Level of Concern

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year

5 10 2006 2007 2008 2009 Late 2009 (proposed) Number o