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III. ENVIRONMENTAL SETTING,IMPACTS AND MITIGATION MEASURES
<br /> D. NOISE
<br /> TABLE IIID-8
<br /> TRAFFIC NOISE LEVELS ALONG PROJECT ROADWAYS
<br /> A.M.Peak-Hour Noise Level,Lega,b
<br /> Existing Cumulative Cumulative
<br /> Roadway Segment Existing Plus Project Baseline Plus Project
<br /> Fresno Ave(north of Navy)c 66.5 67.8 68.9 69.3
<br /> Navy Dr(north of Charter)d 67.7 68.3 69.1 69.4
<br /> Navy Dr(west of Pershing)e 63.4 67.3 62.7 66.2
<br /> a Noise levels were calculated using the FHWA traffic noise prediction model for weekday a.m.peak-hour
<br /> conditions at a distance of roughly 75 feet from the centerline of the roadway for Navy Drive. A distance of
<br /> 125 feet from the centerline of the roadway was used for Fresno Avenue where residences are set back further from
<br /> the roadway edge. Noise modeling results are presented in Table A-9 of Appendix A.
<br /> b
<br /> The analysis assumes the average vehicle speed on these roadways to be 35 mph.
<br /> c For existing conditions.a vehicle mix consisting of 87 percent automobiles,three percent medium trucks,and
<br /> 10 percent heavy trucks was assumed for this roadway segment. Under existing plus project conditions,the vehicle
<br /> mix used in modeling consisted of 76 percent automobiles, 13 percent medium trucks,and 11 heavy trucks. In lieu
<br /> of specific details,the existing plus project vehicle mix was used to evaluate roadside noise levels under the
<br /> cumulative scenarios.
<br /> d For existing conditions,a vehicle mix consisting of 69 percent automobiles, 13 percent medium trucks,and
<br /> 18 percent heavy trucks was assumed for this roadway segment. Under existing plus project conditions,the vehicle
<br /> mix used in modeling consisted of 64 percent automobiles, 18 percent medium trucks,and 18 heavy trucks. In lieu
<br /> of specific information,the existing plus project vehicle mix was used to evaluate roadside noise levels under the
<br /> cumulative scenarios.
<br /> e For existing conditions,a vehicle mix consisting of 73 percent automobiles, 14 percent medium trucks,and
<br /> 13 percent heavy trucks was assumed for this roadway segment. Under existing plus project conditions,the vehicle
<br /> mix used in modeling consisted of 42 percent automobiles,44 percent medium trucks,and 14 heavy trucks. In lieu
<br /> of specific information,the existing plus project vehicle mix was used to evaluate roadside noise levels under the
<br /> cumulative scenarios.
<br /> SOURCE: Environmental Science Associates
<br /> REFERENCES —Noise
<br /> Bolt,Baranek, and Newman. 1971. Noise from Construction Equipment and Operations,
<br /> Building Equipment, and Home Appliances. 1971.
<br /> Caltrans, Traffic Noise Analysis Protocol, Traffic Noise Supplement, October 1998.
<br /> City of Stockton, General Plan, Policy Document,Adopted January 22, 1990a.
<br /> City of Stockton,General Plan, Background Report, Adopted January 20, 1990b.
<br /> Cunniff. 1977. Environmental Noise Pollution. John Wiley & Sons,New York. 1977.
<br /> Smith,Mae,et.al.,Authorized representatives of the Trinity Community Church, letter of
<br /> support,June 18, 1999.
<br /> Smith, Mae,President,Trinity Community Church,telephone communication,March 21, 2000.
<br /> Stockton Scavenger Transfer Station Expansion III.D.20 ESA 1990190
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