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Mountain House Community Services District Design Manual 2002 The MHCSD Design Manual does not contain relevant measures or standards related to air quality. SIGNIFICANT IMPACTS IDENTIFIED IN THE MOUNTAIN HOUSE MASTER PLAN AND SPECIFIC PLAN I FINAL EIR The MHMP EIR identified the following significant air quality impacts before mitigation associated with implementation of the MHMP: The project would increase regional emissions of criteria pollutants through new vehicle travel and new area- source emissions associated with residential and industrial uses in excess of threshold levels established by the San Joaquin Valley Unified Air Pollution Control District. The project would cause a potentially significant increase in the potential for nuisance complaints resulting from adjacent agricultural activities. The project would cause a less-than-significant increase in the potential for odor-related land use conflicts. The project would cause a less-than-significant increase in CO along streets and intersections providing access to the project site. The project would cause significant emissions of PMio during construction. 4.12.3 SIGNIFICANCE THRESHOLDS For the purpose of this analysis,the following applicable thresholds of significance from the SJVAPCD Guide for Assessing and Mitigating Air Quality Impacts(SJVAPCD 1998) are used to determine if the proposed project would result in a significant air quality impact: Short-term Increases in Regional Criteria Pollutants.Construction impacts would be significant if appropriate, feasible construction control measures in compliance with Regulation VIII as listed in the SJVAPCD Guidelines are not incorporated or implemented. 0 Increases in Toxic Air Contaminants. TAC impacts would be significant if the project would expose the public to substantial levels of TACs so that the probability of contracting cancer for the Maximally Exposed Individual would exceed 10 in 1 million and/or so that ground-level concentrations of non-carcinogenic toxic air contaminants would result in a Hazard Index greater than 1 for the Maximally Exposed Individual. Increases in Odorous Emissions. Odor impacts would be significant if the project has the potential to frequently expose members of the public to objectionable odors. Increases in Local Mobile-Source CO Concentrations. Local mobile-source impacts would be significant if the project contributes to CO concentrations that exceed the State Ambient Air Quality Standard of 9.0 ppm for 8 hours or 20 ppm for 1 hour. Long-Term Increases in Regional Criteria Pollutants. Regional(operational)impacts would be significant if the project generates emissions of reactive organic gases(ROG) and NOx that exceed 10 tons per year (TPI). College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.12-19 Air Quality