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I EXECUTIVE SUMMARY TABLE 2-1 (Continued) SUMMARY OF IMPACTS AND MITIGATION MEASURES LEVEL OF ENVIRONMENTAL IMPACT MITIGATION MEASURES SIGNIFICANCE AFTER MITIGATION NOISE 4.5.1 Noise generated by mining equipment and excavation 4.5.1a The Applicant shall do one of the following measures: Less-than-Significant activities would result in an increase in the ambient noise levels at the nearest residence(s). This would be a a. Construct sound barriers along all sides of the project site potentially significant impact. that face off-site sensitive receptors that are located within 1,000 feet of the project site. This includes the perimeter of the project site except the eastern boundaries of Phases VI, VI1,and VIII,and the southern boundary of Phase VI. The sound barriers must be at sufficient height to block the line of site to the nearest sensitive receptor and may be a masonry wall,earthen berm,or some combination thereof. b. Install double pane windows and air conditioning units on all residential homes identified as sensitive receptors that are located within 1,000 feet of the project site. 4.5.1b The Applicant shall conduct additional noise measurements to evaluate the effectiveness of Mitigation Measure 4.5.1a or 4.5.1b in reducing resultant sound levels at nearby sensitive receptors. For those residences requiting additional sound reduction,the Applicant shall fund the construction of solid fences along those property lines of the residences facing the project site. 4.5.2 Operation of the processing plant could potentially 4.5.2a Implementation of Mitigation Measures 4.5.1 and 4.5.2 would Less-than-Significant increase ambient noise levels at nearby residence(s). reduce impacts of processing plant noise on local residents to a This would be a potentially significant impact. less-than-significant level. RMC Pacific Vernalis Quarry Mining and Reclamation Project 2-10 FSA/20.3015 Administrative Dora Put March 2004