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Air Quality The Traffic/Ar Emissions Reduction Alternative would include 101 fewer residential units,3.5 more acres of neighborhood commercial,and 202,700 sf more office commercial than the proposed project.This alternative would also develop 432 residential units as medium-high-density(R/MH—Cluster)clustered units rather than as medium- density residential(R/M)detached units,which would occur under the proposed project, and would include a transit — program designed to reduce motor vehicle trips.Although air quality modeling of this alternative has not been conducted,both scenarios would include the development of an 815-acre mixed use project including thousands of residential units,hundreds of thousands of square feet of commercial/industrial uses,two K-8 schools, and other public facilities.Therefore,like the proposed project,it can be reasonably anticipated that this alternative would result in: significant temporary construction emissions of criteria pollutants, significant and unavoidable TAC emissions, significant odors, less-than-significant local mobile-source CO emissions, and significant and unavoidable long-term regional emissions of criteria pollutants. As indicated under"Transportation"above,this alternative would generate less traffic than the proposed project. — Therefore,this alternative would generate less long-term regional emissions of criteria pollutants and more local mobile-source CO emissions than the proposed project(although it would not avoid the significant and unavoidable air quality impact of the proposed project with respect to regional emissions of criteria pollutants).Although this — alternative would include more commercial development than the proposed project,and thus theoretically generate more TAC emissions,this would be a localized rather than an air basin-wide impact, and there is still considerable debate in the air quality field as to the true health effects of TACs on adjacent sensitive receptors(which would be _ proposed residential under this alternative).Therefore,the reduction in long-term regional emissions of criteria pollutants under this alternative would outweigh the potential increase in TACs.[Lesser] Noise The Traffic/Air Emissions Reduction Alternative would include 101 fewer residential units, 3.5 more acres of neighborhood commercial,and 202,700 sf more office commercial than the proposed project.This alternative would also develop 432 residential units as medium-high-density residential(R/MH—Cluster)clustered units rather than as medium-density residential(R/M)detached units, as would occur under the proposed project, and would include a transit program designed to reduce motor vehicle trips.Although noise modeling of this — alternative has not been conducted,both scenarios would include the development of an 815-acre mixed use project including thousands of residential units,hundreds of thousands of square feet of commercial/industrial uses,two K-8 schools, and other public facilities.Therefore,like the proposed project, it can be reasonably _ anticipated that this alternative would result in: significant temporary construction noise, significant stationary source noise, significant long-term traffic noise,and significant incompatibility of proposed uses with predicted on-site noise levels. As indicated under"Transportation"above,this alternative would generate less traffic than the proposed project. Therefore,this alternative would generate lower traffic noise levels than the proposed project. Although this alternative would include more commercial development than the proposed project, and thus theoretically generate more stationary source noise,this increase in stationary source noise would occur primarily at the northwest comer of Grant Line Road and DeAnza Boulevard,where a residential parcel under the proposed project would instead be developed with commercial office under this alternative(Figure 5-1).Because residential — uses are planned to be developed directly adjacent to this commercial development,the increase in stationary EDAW College Park at Mountain House Spec'rfic Plan III Draft EIR Alternatives to the Proposed Project 5-24 San Joaquin County