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nonattainment pollutants or their precursors, unless ARB determines that all feasible measures are being employed to reduce emissions. The 1991 Air Quality Attainment Plan for the San Joaquin Valley was prepared by the SJVUAPCD. The Plan responds to the requirements of the CCAA and was approved by ARB in January 1992. The Plan covers both ozone and carbon monoxide attainment issues. The San Joaquin Valley Air Basin was reclassified by ARB as a State attainment area for carbon monoxide in November 1994. Ozone has been reclassified twice in the past few years from serious to extreme. The San Joaquin Valley Air Basin does not attain PM10 ambient air quality standards, but the CCAA does not yet require attainment programs for PM10. The California legislature, when it passed the CCAA in 1988, recognized that PM10 attainment was not easily obtained and excluded it from the requirements of the CCAA. The CCAA did require ARB to produce a report regarding the prospect of achieving the State ambient air quality standard for PM10. ARB recommended that certain actions be taken, but did not impose a planning process to require attainment within a specified time frame. Analysis of Potential Impacts: Describe to what extent project activities would: a. Conflict with or obstruct implementation of the applicable air quality plan. Less Than Significant Impact. The air quality impact of the proposed project has been determined by examining the types and levels of emissions that would be generated by the project, the existing air quality conditions and neighboring land uses. The San Joaquin Valley Unified Air Pollution Control District(SJVUAPCD) provides thresholds to be used to determine whether a project or plan will have a significant air quality impact SJVUAPCD 2001 a and 2001 b). The District recommends that land use and site design issues be addressed while a proposed project is still in the planning phase to allow the incorporation of conservation measures and desirable modifications to minimize air quality impacts (SJVUAPCD 2003). The proposed project has incorporated air quality beneficial features into the project design and implementation plan and no significant source of air pollution would result from the completed project. However, during construction, heavy operating equipment would temporarily increase emissions at the project site. The proposed project will not result in a change in land use for the site area. The project involves removing potentially contaminated sediments and the project will provide long- term air quality benefits to the area by maintaining and/or improving soil quality and vegetative cover at the Site. The project will not create any new long-term pollution sources. However, short-term air quality impacts associated with dust and construction equipment exhaust could result from construction activities within the project area. The project will incorporate"Control Measures", as recommended by the SJVUAPCD in the 2001 Air Quality Rule 8021 —Construction, Demolition, Excavation, Extraction, and other Earthmoving Activities, to control possible short-term air quality impacts and avoid significant impacts (SJVUAPCD 2001). These measures include pre-watering work areas, phasing work to reduce amount of disturbed surface area, and maintaining water on areas of activity. Minor odors associated with exposed soils may be created as a result of excavation. However, these potential odors are not expected to be objectionable to surrounding neighboring land uses. The potential odors will be very similar to those already present at the Site and in the surrounding vicinity. With current climate and geographics, a sufficient amount of dilution air is present to minimize objectionable odors in the immediate area. 10