Transcript Houston Bucket Brigades

EPA Air Toxics Programs
Ruben R. Casso
Toxics Coordinator
EPA Region 6
Email: [email protected]
Phone 214-665-6763
The Federal Government/EPA’s Role:
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The focus with regard to air toxics is for EPA to issue
nationwide rules to control air toxics emissions at the source.
EPA does not have ambient air quality standards for air toxics
Regulatory efforts
 Stationary sources: major (large) & area (smaller)
 Mobile source air toxics
Voluntary efforts
 Support for State/Local community air toxics efforts
EPA’s Relationship with the State
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Congress intended for state agencies to be the
primary implementers of Air Quality Programs
EPA approves/delegates the implementation of
Federal Air Quality Programs to the States
States may decide to conduct their air quality
programs/activities at levels which go beyond the
minimum requirements set forth by EPA
EPA Stationary Source
Air Toxics Rulemaking
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The CAA identified 188 hazardous air
pollutants (HAPs) and 174 specific categories
to be regulated under maximum achievable
control technology (MACT) rules technologybased rules for facilities
Two phase program for large industrial
sources (e.g., chemical manufacturers)
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Technology-based standards major sources
Risk-based review of technology standards
Technology-based standards for smaller sources
(or “area” sources, e.g., dry cleaners)
EPA MACT Rulemaking
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EPA promulgated about 100 major source
MACT rules for specific facility categories
EPA has begun the process of evaluating
residual risk on major source MACT rules
EPA is developing MACT rules for 70 area
(minor) source categories
Mobile Source Air Toxics
Regulatory Air Toxics Effort
 Mobile source air toxics (MSAT) Rule
Additional Efforts – Diesel Emission Reduction
 School Buses
 Other efforts on vehicles/infrastructure
 Diesel-powered equipment at:
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Ports
Airports
Rail
Mobile Source Air Toxics (MSATs)
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Diesel Emissions
(Diesel Particulate Matter +Diesel Exhaust Organic Gases)
Acetaldehyde, Acrolein, Benzene, 1,3-Butadiene, Ethylbenzene
Formaldehyde, MTBE, Naphthalene, n–Hexane, Styrene,
Toluene, Xylene
Arsenic Compounds, Chromium Compounds, Lead Compounds
Manganese Compounds, Mercury Compounds, Nickel
Compounds
Polycyclic organic matter (POM), Dioxin/Furans
Mobile Source Air Toxics (MSAT) Rule
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Proposed Rule expected February 2006
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Final Rule expected February 2007
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EPA expects the new MSAT rule to have 3 parts:
 1) Fuel controls ( i.e. benzene content in gasoline)
 2) Light-Duty vehicles
(Evaporation provisions similar to CA requirements
and cold temperature VOC reduction provisions)
 3) Gas can requirements
Additional Ozone SIP State/Local
Air Toxics Emissions Reductions
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Impact of the EPA Air Quality Standards for Ozone
include requirements to reduce VOC ozone precursor
emissions under the SIP, some of which are air toxics.
Houston SIP controls in the 2005-2007 time frame should
result in emission reductions/improvements for air toxics
Highly reactive volatile organic compounds (HRVOC) rules
will lower 1,3-butadiene emissions in the area.
Benzene emissions will also be reduced through SIP efforts.
EPA Support for State/Local
Community Air Toxics Efforts
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States may decide to conduct their air quality
programs/activities at levels which go beyond
the minimum requirements set forth by EPA
EPA supports State/local agency efforts to
address community air toxics
EPA support flexibility for State/Local
agencies to address community air toxics in a
manner they deem appropriate for specific
state/local circumstances