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iAmy Gartin 11 October 2011 Page 1 INTRODUCTION This report summarizes our environmental noise assessment for the proposed enlargement of the East Stockton Transfer and Recycling(ESTRS)facility on Weber Avenue in Stockton, California. This enlargement is occurring due to the closing of the 401 South Lincoln Street (Lincoln)facility. The purpose of the study is to quantify the existing noise environment at the project site, as well as future operational changes(e.g.,number of truck deliveries)and compare it to the applicable City standards. This letter summarizes the applicable noise standards, noise measurement results, and calculated project noise levels. For those unfamiliar with the fundamental concepts of environmental acoustics,please refer to Appendix A and Figure Al. EXECUTIVE SUMMARY The following summarizes our findings with mitigation as described in Section 3 of this report: • On-site truck activity associated with the expansion of the existing ESTRS facility and relocation of the truck entrance farther west down Weber Avenue will not exceed the City's Development Code Noise Standards. • The existing noise exposure at the pro'ect is considered"Conditionally Acceptable"for industrial(IL and IG) land uses.DNL along Weber Avenue due to truck traffic associated with the ESTRS facility are expected to increase to 74 dB.DNL 74 dB is still considered "Conditionally Acceptable"and the City's General Plan allows for a maximum 3 dB increase in noise levels. ® On-site activities not associated with truck activity will take place indoors and are not expected to be a significant source of noise. SECTION l: ACOUSTICAL CRITERIA City of Stockton General Plan Table 1 summarizes the compatibility of industrial land-uses with respect to noise level s I For the purposes of our analysis,on-site truck activity is considered any noise generated by trucks(including material delivery) while on ESTRS property. 2 Day-Night Average Sound Level(DNL)—A descriptor established by the U.S.Environmental Protection Agency to represent a 24-hour average noise level with a penalty applied to noise occurring during the nighttime hours(10 p.m.to 7 a.m.)to account for the increased sensitivity of people during sleeping hours. 3 Table 1 is based on Table 11-1 of the City's 2035 General Plan,Page 11-6. L C I,-)Su to o reel -n rrsn... t o-1 a ,1 _4 ... .s',i _ r x: 3L�