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renovation of existing structures that contain asbestos,thus potentially resulting in the airborne entrainment of asbestos and the creation of an exposure hazard, and the proposed project could include the use of diesel- fueled vehicles,which could result in the generation of diesel particulate matter emissions that exceed SJVAPCD significance thresholds. The MHMP EIR concluded that implementation of the MHMP, including development of the College Park site as proposed in the MHMP, could cause adverse health impacts on workers during renovation and/or demolition of asbestos farm structures,would increase carbon monoxide concentrations along streets and intersections, and would have construction activities that would generate dust and particulate matter exceeding the threshold of significance for respirable particulate matter 10 microns or less in diameter(PM10). In response,the County adopted a Statement of Overriding Considerations for these impacts in 1994. Therefore,health-related issues relating to asbestos and construction-related impacts of the proposed project, while significant and unavoidable,would be within the scope of impacts identified in the MHMP EIR and the adopted Statement of Overriding Considerations.However, with regard to TACs in relation to diesel-fueled vehicles,there is no specific mitigation from the California Air Resources Board(ARB), as this is a relatively new concern. It is also unclear what effects ARB's new diesel engine emission standards and diesel PM regulations would have on the level of impact and necessity for, or type of,mitigation. The only available mitigation,completely separating emission sources(diesel vehicles)from all sensitive receptors, is not a .. feasible mitigation measure for a mixed-use project such as the proposed project.Therefore,a significant and unavoidable impact would occur.This conclusion would change in the future if effective, statewide regulatory controls are implemented Cumulative Localized Stationary Noise Sources.The commercial,office,and industrial uses under the proposed project, as well as landscape maintenance activities under the proposed project,would result in stationary-source noise that could exceed applicable County standards at existing and proposed nearby noise- sensitive land uses. Although mitigation is identified in Section 4.13,"Noise,"to mitigate this stationary source noise,and although stationary-source noise is localized,the stationary-source noise to be generated at the periphery of the project could potentially add to existing and future stationary-source noise to be generated off-site but adjacent to the project site.This includes future off-site Mountain House development on the north side of Grant Line Road and at the Mountain House Business Park,and future stationary-source noise that could be generated by future off-site uses east of Mountain House Parkway.Therefore,although the project would not result in significant stationary-source noise by itself after mitigation, it could contribute considerably to localized cumulative stationary-source noise.A significant and unavoidable cumulative impact would occur because no mitigation is available to mitigate this impact.' s Cumulative Change in Views.Development along the I-205 corridor has increasingly changed the visual character from agricultural and open-space use to urban use,thus altering and limiting the views available to motorists on nearby roadways. This trend will continue as future projects are implemented in the region,and the proposed project would contribute to this cumulative change in views.As development proceeds in the project region as a whole, substantial changes in visual conditions would continue as agricultural lands and open space are replaced by urban development. Increased urban development would also lead to increased nighttime light and glare in the region and more limited views of the night sky. The cumulative effect of these changes on visual resources from past and planned future projects, as well as the contribution from the proposed project, is considered significant and unavoidable.Although these cumulative impacts can be minimised to a degree through vegetative and topographic screening of structures,use of outdoor lighting that limits glare, appropriate building design, and other measures,the significant and unavoidable cumulative impact cannot be fully mitigated.Therefore,the cumulative change of agricultural and open-space views in the project region to urban land uses and the associated increase in nighttime light and glare are considered ' Sound walls would be required around all commercial and industrial uses,loading docks would need to be enclosed,and landscape maintenance activities would need to be restricted to electric rather than gasoline-based lawn mowers and leaf blowers.These actions are contrary to many MHMP policies,including policies limiting the use of sound walls. ` College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 7-5 Other CEQA-Required Sections