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

Air Toxics Air Toxics  Federal – 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, Hammers MACT H – Expanded EPA authority to add new categories categories 1

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 2

Air Toxics Air Toxics  Effects Screening Levels Effects Screening Levels  Benzene B  Butadiene  Air Pollutant Watch List 3

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 new process. 4

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 monitors in the Houston Region showed a All it i th H t R i h d decrease in average benzene concentration from 2005-2008  87% of the monitors statewide showed a decrease in average benzene concentration from 2005-2008 from 2005 2008 5

Benzene Concen ntration (ppbv) 0.0 0.1 0 2 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1 5 1.6 1.7 1.8 1.9 2.0 2.1 Port Arthur, City y Service Center * Tex xas City, 11th St. Galena Park Longview * Houston, L Lynchburg Ferry (Values shown are arithmetic means of 5329 to 7594 hourly autoGC measurements where available*; otherwise arithmetic means of 45 to 61 canister samples.) Houst ton, Jacinto Port Groves Pasadena North P # Laredo, Zara agosa St. Bridge Corpus Chri sti, Huisache St. Beaumont, , Carroll St. Park # * Tex xas City, 31st St. 2008 Average Benzene Concentrations at Air Monitoring Sites in Texas El Paso, Womble E El P Paso, Sun Metro Manchester Texa as City, Ball Park * Channelview Port Arthur, West P Shore Acres # # * El Paso, Chamizal # Baytown Port Arthur, Jeffe erson Co. Airport Corpus Christi, Hillcrest Aldine Karnack NW Harris C County, Tomball * Houston n, Cesar Chavez Port Neches Laredo, Washington St. * Hou ston, Clinton Dr. # * Beaumo ont, Lamar Univ. * Hous ston, Haden Rd. * Deer Park had less than 75% data return in 2008 Shore Acres; El Paso, Chamizal; Houston, Clinton Dr.; Danciger; and Houston, Milby Park Pasadena North was activated on July 1, 2008 P Beaumont, Carroll Street Park was deactivated on July 30, 2008 Dallas, Boys Club site was not included due to being deactivated in February 2008 # Incomplete sampling year Corpus Ch hristi, Dona Park * Corpus C Christi, Oak Park d San Anton nio, Old Hwy. 90 Austin, Webberville Rd. N * Nederla and High School th Mission * Odessa, Hays Housto on, Bayland Park ti * Hou uston, Milby Park # t d TCEQ Long-Term Effects Screening Level (ESL) = 1.4 ppbv * Liverpool Co onroe, Relocated J l 1 2008 Edinburg * Od dessa, Gonzales Brownsville * Baytown n, Wallisville Rd. Clute * Corpus Chris sti, Solar Estates Greenville * Tex xas City, 34th St. Midloth ian, Old FW Rd. Denton Airport S. D Kaufman Grapev vine, Fairway Dr. Italy * D Dallas, Hinton St. Ga lveston, 99th St. 6 * Ft. Worth, NW * Lake Jackson * Danciger #

Benzene Conce entration (ppbv) 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3 5 3.5 *L Lynchburg Ferry 25% 52% 65% Annual Average Benzene Levels at Selected Harris and Galveston County Sites, 2005-2008 20% %12% Galena Park 33% (based on hourly autoGC data if available*; otherwise every-sixth-day 24-hour canister data) Manchester 2% 29% % 28% % Shore Acres 25% 31% 49% Tx x City, Ball Park 22% 44% 38% % 9% *Haden Rd 28% 42% *Clinton Dr 12% 32% 7% 12% *Deer Park 20% 33% NW W Harris County, 19% 23% Tomball 27% *Cesar Chavez 17% 17% 26% Aldine 11% Clinton and Milby Park had less than 75% data return in 2008 % - Percent reduction for each year compared to 2005 13% 11% *Tex xas City, 34th St 47% 64% 73% Clute -3% 27% 32% 3% Bayland Park 6% 16% 34% *Milby Park 26% 38% 5% * *Mustang Bayou 13% 13% -19% *Wallisville 6% 2% 11% *Danciger 29% 29% 7 2008 2007 2006 2005 19% *Lake Jackson 16% 25%

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 # - Incomplete year of sampling 2005 1 3-Butadiene ppbv 2005 1,3 Butadiene ppbv Clinton, Danciger, Deer Park, and Milby Park had less than 75% data return 2006 1,3-Butadiene ppbv in 2008 Galveston Airport and Channelview North were deactivated in 2007. 2007 1,3-Butadiene ppbv 1.8 Jacintoport was activated in 2006. Galveston 99th was activated in 2007. 2008 1,3-Butadiene ppbv 1.6 ntration (ppbv) 1.4 1.2 TCEQ Long-Term Effects Screening Level = 9.1 ppbv Butadiene Conce 1.0 # 0.8 1,3-B 0.6 0.4 # # # 0.2 0 2 # # # # # 0.0 *Milby Park *Channelview Cesar Chavez nchburg Ferry *Haden Rd Manchester *Clinton Dr Galena Park Baytown *Deer Park Aldine Shore Acres nelview, North Jacintoport s City, 34th St Lake Jackson ustang Bayou City, Ball Park Clute Bayland Park Nessler Pool *Danciger *Wallisville unty, Tomball veston Airport on 99th Street *Mu * *C *Lyn *L Tx C Galv Chann *Texas Galvesto Texas City, NW Harris Co 8

Air Pollutant Watch List  Currently, there are 12 APWL 12 APWL areas in 11 i 11 counties  Over the last 2 years, O th l t 2 6 pollutants have been removed been removed Number of Chemicals on the Air Pollutant Watch List  7 more pollutants in 5 30 APWL areas are APWL areas are 25 of Chemicals at a Level of Concern proposed to be 20 removed later this 15 Number o 10 year 5 9 0 2006 2007 2008 2009 Late 2009 (proposed)