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EnviroNoise <br /> Monitoring and Measuring <br /> 9628 Alcosta Blvd.,San Ramon,CA 94583 <br /> (510)829-6641 <br /> December 28,1994 <br /> Executive Summary <br /> The attached report assesses the current noise impacts and the potential impact of future operations <br /> of the Brown Sand and Gravel Plant Operation in Vernalis, CA.The analysis of the datacollected <br /> clearly shows that the noise impact from the Plant is minimal in relation to the environment where <br /> it is located. <br /> • The noise from the existing operation will increase the overall area within the noise contours <br /> resulting from the Interstate Highways only slightly and will not affect the area outside the <br /> existing 60 CNEL contours beyond the property boundary, even if the operating hours of the <br /> plant are extended to 24 hours per day, seven days per week. <br /> • Figures 2 and 3 show that the existing and potential noise levels from the plant will not affect <br /> any of the neighboring residences or facilities in the vicinity of the Sand Plant. Even "full-time, <br /> 24 hours per day", operation, if it could be achieved, will not cause a significant increase in <br /> the noise at the neighboring residences. <br /> • Beyond the effects of traffic increases on Bird Road, which do not affect any residences, <br /> traffic noise increases will not be of significant concern. As the traffic from the Tiechert <br /> Operation at Blewett Road becomes a factor,the effects of traffic from Brown Sand Plant will <br /> be even less noticable. This is shown on Table 3, page 7 of the report. <br /> There is a Glossary defining noise terminology with the report (pages 9, 10 and 11). Printouts of the <br /> data from the measuring equipment are included in a supplemental binder. The data is also available <br /> in electronic form. <br /> l. i <br />