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San Joaquin County Community Alternatives Analysis Development Department Environmentally Superior Alternative Under the State CEQA Guidelines, Section 15126.6, a draft EIR must identify an — "environmentally superior alternative." Based on the information and analysis presented in this draft EIR,none of the adverse impacts associated with the proposed Project would occur under the No-Project Alternative. The No-Project — Alternative is therefore considered the environmentally superior alternative. However,the State CEQA Guidelines require that,when the No-Project Alternative is the environmentally superior alternative,an EIR must identify an — environmentally superior alternative among the other alternatives(Section 15126.6). As discussed above and in Chapter 3,the proposed Project would have significant and unavoidable impacts related to generation of air quality emissions _ in excess of thresholds and an increased health risk from exposure to diesel exhaust. The Off-Site Processing Alternative would meet the project objectives and would substantially reduce the aesthetic impacts of the project. This alternative would also reduce on-site air quality pollutant emissions through elimination of the processing facilities, though the reduction would not be to less-than-significant — levels. However, moving the processing offsite would result in additional miles of truck travel to deliver unprocessed material to the off-site processing plant and then deliver processed material to the final user. Cumulative impacts of this alternative would remain the same as for the proposed Project. The Mitigated Design Alternative would meet all the project objectives and — would result in overall less noise impacts on sensitive receptors,as well as less traffic impacts. Noise levels from project operation would decrease significantly at sensitive receptors located to the north of the project area,and would increase — slightly at receptor locations to the west and east because distance to those receivers would decrease. The potential for structural damage to Koster Road from movement of heavy trucks would decrease slightly because of the decreased travel distance on this roadway. Because the Mitigated Design Alternative would result in an overall decreased potential for impact, it is therefore the environmentally superior alternative. DeSilva Gates Quarry Project — Draft Environmental Impact Report q-g As 05105.05