4.12 Air Quality
AIR QUALITY
4.12
The principal sources of pollutant emissions for the proposed action include the following:
Combustion emissions from diesel engines used in dredging operations;
Combustion emissions from diesel engine driven booster pumps used for sand conveyance;
Combustionemissions fromconstructionequipment at receiver sites used to install, positionand remove
conveyance piping and pumps, construct training berms, and distribute sand; and
Fugitive dust from earth (sand) moving operations.
Generally, air quality is a regional issue, and potential impacts to air quality are evaluated on a regional
basis. Localized impacts may be considered in cases of potential severe traffic congestion or the release
of toxic air pollutants. Neither of these cases are applicable to the proposed action. Therefore, the air
quality impact analysis considers the project as a whole, and not by individual receiver and borrow sites.
Air quality impacts are also not dependent upon the season of construction.
R
4.12.1 Significance Criteria
Air quality impacts would be considered significant if the action would
violate any federal or state ambient air quality standard;
contribute to an existing or projected air quality violation; or
expose sensitive receptors to criteria or toxic pollutant concentration in violation of applicable health-
based legal limit.
As noted in Section 3.12, the SDAPCD does not have quantitative emissions limits for construction
activities. It may be reasonably assumed for nonattainment pollutants, that if the project conforms to the
SIP, then emissions would not violate any ambient air quality standard nor contribute to an existing or
projected air quality violation. It may also be assumed that if the standards for nonattainment pollutants are
applied to attainment pollutants, then conformance to these standards would result in emissions that would
be less than significant.
Regional Beach Sand Project EIR/EA
Page 4.12-1
99-69\sect-04.12.wpd 7/19/00
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