|
to transit agencies; and reporting requirements,under which transit agencies must demonstrate compliance with
<br /> the public-transit bus fleet rule. Upcoming milestones include the low-sulfur diesel fuel requirement and tighter
<br /> emission standards for heavy-duty diesel trucks(2007) and off-road diesel equipment(2011)nationwide. Over
<br /> time,the replacement of older vehicles will result in a vehicle fleet that produces substantially lower levels of
<br /> TACs than under current conditions. Mobile-source emissions of TACs(e.g.,benzene, 1,3-butadiene, diesel PM)
<br /> have been reduced significantly over the last decade, and will be reduced further in California through a
<br /> progression of regulatory measures(e.g.,Low Emission Vehicle/Clean Fuels and Phase II reformulated gasoline
<br /> regulations) and control technologies.With implementation of ARB's Risk Reduction Plan, it is expected that
<br /> diesel PM concentrations will be reduced by 75%in 2010 and 85% in 2020 from the estimated year-2000 level.
<br /> Adopted regulations are also expected to continue to reduce formaldehyde emissions from cars and light-duty
<br /> trucks. As emissions are reduced,it is expected that risks associated with exposure to the emissions will also be
<br /> reduced.
<br /> ARB published the Air Quality and Land Use Handbook:A Community Health Perspective,which provides
<br /> guidance concerning land use compatibility with TAC sources(ARB 2005a). While not a law or adopted policy,
<br /> the handbook offers advisory recommendations for the siting of sensitive receptors near uses associated with
<br /> TACs, such as freeways and high-traffic roads, commercial distribution centers,rail yards,ports,refineries dry
<br /> cleaners, gasoline stations, and industrial facilities,to help keep children and other sensitive populations out of
<br /> harm's way. A number of comments on the handbook were provided to ARB by air districts,other agencies,real
<br /> estate representatives, and others. The comments included concern over whether ARB was playing a role in local
<br /> land use planning,the validity of relying on static air quality conditions over the next several decades in light of
<br /> technological improvements, and support for providing information that can be used in local decision making.
<br /> At the local level, air pollution control or management districts may adopt and enforce ARB control measures.
<br /> Under SJVAPCD Regulations II and VII, all sources that possess the potential to emit TACs are required to
<br /> obtain permits from the district. Permits may be granted to these operations if they are constructed and operated in
<br /> accordance with applicable regulations, including new-source review standards and air toxics control measures.
<br /> SJVAPCD limits emissions and public exposure to TACs through a number of programs. SJVAPCD prioritizes
<br /> TAC-emitting stationary sources based on the quantity and toxicity of the TAC emissions and the proximity of
<br /> the facilities to sensitive receptors.
<br /> Sources that require a permit are analyzed by SJVAPCD (e.g.,health risk assessment) on the basis of their
<br /> potential to emit toxics. If it is determined that the project would emit toxics in excess of SJVAPCD's threshold of
<br /> significance for TACs, as identified below, sources must implement the best available control technology for
<br /> TACs(T-BACT)to reduce emissions. If a source cannot reduce the risk below the threshold of significance, even
<br /> after T-BACT has been implemented, SJVAPCD will deny the permit required by the source. This helps to
<br /> prevent new problems and reduces emissions from existing older sources by requiring them to apply new
<br /> technology when retrofitting with respect to TACs. It is important to note that SJVAPCD's air quality permitting
<br /> process applies to stationary sources;properties that are exposed to elevated levels of nonstationary type sources
<br /> of TACs, and the nonstationary type sources themselves(e.g., on-road vehicles), are not subject to air quality
<br /> permits. Further, for reasons of feasibility and practicality,mobile sources(cars,trucks, etc.) are not required to
<br /> implement T-BACT, even if they do have the potential to expose adjacent properties to elevated levels of TACs.
<br /> Rather, emissions controls on such sources(e.g.,vehicles)are subject to regulations implemented on the federal
<br /> and state levels.
<br /> Odors
<br /> SJVAPCD has determined some common types of facilities that have been known to produce odors, including
<br /> wastewater treatment facilities, chemical manufacturing plants,painting/coating operations, feed lots/dairies,
<br /> composting facilities, landfills, and transfer stations.Any actions related to odors are based on citizen complaints
<br /> to local governments and SJVAPCD.According to SJVAPCD, significant odor problems occur when there is
<br /> Manteca WQCF and Collection System Master Plans EIR EDAW
<br /> City of Manteca 4.3-17 Air Quality
<br />
|