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ri) m 3 � Table 2-1 (continued) Summary of Impacts and Mitigation Measures (Applicable to Program and Project-Specific Impacts) Impact Significance Mitigation Measure Significance before Mitigation after Mitigation measures designed to mitigate construction emission impacts of 1998)and repeated in the"Regulatory Setting"subsection. The new development,it does not identify the specific control measures SJVAPCD periodically revises its control measures. Development or guarantee that the latest version of the control measures would under College Park would be required by the SJVAPCD to implement be implemented. A significant impact could occur. the current version of the measures at the time individual development applications are received by the County for development under Colley Dart 4.12-2.Air Quality—Potential Generation of Toxic Air SU 4.12.2:Air Quality—Potential Generation of Toxic Air SU Contaminants.The proposed project could include the demolition Contaminants or renovation of existing structures that contain asbestos,resulting Asbestos—The College Park developers shall implement Mitigation in an exposure hazard from the airborne entrainment of asbestos. Measure 4.9-1. In addition,the proposed project could include the use of diesel- Mobile-Source TAC Emissions—The College Park applicants for fueled vehicles that could result in the generation of diesel PM industrial or commercial land uses shall coordinate with the emissions that exceed SJVAPCD significance thresholds. A SJVAPCD to assess situations in which toxic risk from diesel PM ro significant and unavoidable impact could occur. may occur and to review methodologies that may become available rn to estimate the risk.The developers shall implement any project- level measures adopted by the SJVAPCD to reduce mobile-source TACs emissions. o Implementation of the above mitigation measure would remain significant and unavoidable because,as indicated in the impact discussion,the proposed project would result in a potentially v significant increase in mobile-source TAC emissions,associated primarily with diesel trucks operating on commercial and industrial K land. Mobile-source TACs are a relatively new concern for the ARB. No specific guidelines and practices regarding assessing impacts and providing mitigation are available. It is also unclear what effects = the ARB's new diesel-engine emission standards and diesel y particulate-matter regulations would have on the level of impact and the necessity for,or type of,mitigation. Therefore,the specific Cn conditions of mobile-source TAC impacts cannot be determined at this time. The only available mitigation,completely separating emission sources(diesel vehicles)from all sensitive receptors,is not w a feasible mitigation measure for a mixed use project such as College Park. This conclusion could change in the future if effective, statewide regulatory controls are implemented. 0 o � � m