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2.Executive Summary TABLE 2.1 (CONTINUED) SUMMARY OF IMPACTS AND MITIGATION MEASURES Environmental Impact Mitigation Measures Level of Significance g (Level of Slgniflcance Prior to Mitigation) After Mitigation activities to evaluate the effectiveness of Mitigation Measure 4.5.1a in reducing resultant sound levels at outdoor activity areas of nearby sensitive receptors. For those residences requiring additional sound reduction, the Applicant shall fund the construction of solid walls (masonry walls or other similar construction)along those property lines of the residences facing the project site,if desired and allowed by the subject property owners. 4.5.1c For any residences that would exceed an interior noise level of 45 dBA,Leq indoors,the applicant shall upgrade house noise reduction via window and door upgrades on the side of the houses facing the mine,if the landowner desires and allows the work to be done. 4.5.1d Nighttime mining shall be prohibited within 1,000 feet of residences unless noise measurements confirm that noise levels are below 45 dBA,Leq at the outdoor activity areas of adjacent residences. 4.5.2 Operation of the processing plant could potentially 4.5.2 Implementation of Mitigation Measures 4.5.1 a,4.5.1b, Less than Significant increase ambient noise levels at nearby residence(s). and 4.5.1c would reduce impacts of processing plant This would be a potentially significant impact.(PS) noise on local residents to a less-than-significant level. 4.5.3 Traffic associated with operation of the project would 4.5.3 Depending on the selected Haul Route Option,the Significant result in an increase in ambient noise levels on nearby Applicant shall notify the homeowners(located along the roadways used to access the mine.This would be a roadway segments that would experience significant potentially significant impact.(PS) traffic-related noise)of the noise impacts associated with traffic from project operations. At the request of homeowners along the affected segments (limited to a reasonable number of complaints as determined by the County and not to exceed one year),the Applicant shall retain a qualified acoustical consultant to evaluate outdoor activity area and interior noise levels to determine if roadway traffic associated with the project is resulting in exterior noise levels that exceed 65 dBA DNI-or interior noise levels that exceed 45 dBA DNL(the exterior and interior noise level standards contained in the San Joaquin County Development Title,respectively). For interior noise measurements,residences with air-conditioning RMC Pacific Vernalis Quarry Mining and Reclamation Project 2-10 ESA/Project No.203015 Drag EnAmnmental Impact Repos May 2006 I I 1 1 1 1 1 L.._ L_. L __ t I I I I I