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S. ALTERNATIVES Noise Scenario 1: A reduction in mining operation would result in a reduction in noise due to a decrease in the number of trucks traveling along the roadways. Traffic associated noise would ` still increase along the roadways used to access the mine,but to a lesser extent than the proposed project. Nearby residences would still be impacted by noise from the mining equipment and ` excavation activities as well as the mining operations. Scenario 2: A reduction in the number of phases to be mined would still result in similar noise ` levels as the proposed project. Although the amount of material to be mined over the life of the project would be reduced,the amount of material to be mined on a yearly basis would not be reduced. Impacts associated with this alternative would be similar to the proposed project,but would occur over a shorter period of time. Air Quality Scenario 1: A reduction in mining operation would result in a reduction in air quality impacts due to a decrease in the number of trucks traveling along the roadways on a daily basis and over the life of the project. Construction and operation emissions would be reduced due to a decrease in the amount of aggregate to be mined and processed. However,CO,ROG, and NOx emissions from operations and vehicles, and PM10 from construction activities and mining would still ._. occur, only to a lesser extent than the proposed project. As shown in Tables 4.6-413 and 4.6-4C in Section 4.6, Air Quality,the NOx emissions for onsite processing equipment would exceed the SJVUAPCD thresholds and remain significant and unavoidable for this scenario. Scenario 2: A reduction in the number of phases to be mined would result in similar impacts to air quality as the proposed project,but would occur over a shorter period of time. The CO,ROG, and NOx emissions from operations and vehicles, and PM10 from construction activities and mining would still occur,and the significant and unavoidable impact of the NOx operation emissions would not be reduced with this alternative. Geology and Soits/Mineral Resources Scenario 1: The issues with slope stability and soil erosion would remain with this alternative. These impacts would be similar to those of the proposed project. Scenario 2: A reduction in the number of phases to be mined would result in the reduction of land disturbed at the project site. However,there would still be issues with slope stability and soil erosion. These impacts would be similar to those of the proposed project. Hydrology and Water Quality •- Scenario 1: A reduction in mining operation would result in less project water use. However,the potential to alter groundwater flows,impact water quality,deplete groundwater levels,and contribute to local and regional groundwater overdraft would be similar to that of the proposed ti RMC Pacific Vemalis Quarry Mining and Reclamation Project 5-11 ESA 1203015 Administ,a&c Draft EER Minch 2004