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10/3r117.Ej�3 15:34 135 WDHG ENGP.S PAC,F i93 ��,� ivr �-• ,� ai a �atiaaurJaal 3ULl.J1KU tRtt�Y^1FYY lCil� YAVL. J CONC USJONS As a nicaris of achieving the: Sen Joaquin County General Plan noise level criteria, the following re�lutrements must be included.in the project design. lfthe praj ecr appltcant chooses to redesign the projcct, further analysis of exterior and iuueraor noise levels shall nerd to be conducted 1. Based upon Table 3, a a 16-foot tall property tine barrier would be, required to reduce traffic raois6 Revels to 65 d3 Ldn at the first rove ofresidenees adacerat to 1-5, and extended the length of tht detention basin along the north end of the property. Ora the south.side of the projcct site,the btrrrier would need to return toward the cast along tlae high water line;starling at a hoight of 12 feet, and gradually decreasing to 6-fW h)height as 5howr; onFigure :. On the nor.h ctid of the project site,the barrier should extend aloat,g the property lines of Lots 49 and 49,siartixag at abrighz of 8 feet and graduallydecxeabing to b feet in height a� show,, otr Figurc L $,criers should be constructed on concmte or masanry block, or precast cor]cretc.: Wood.i5 trot roc Wni cztded due to eventual warping and shrinking of rnalerials which results in openiagsend cracks which compromise the barzierlotrgevity. Other prefabricated barriers may be used. .Howevtr,they should be reviewed by an acoustical consultant. 2 If single story residences are built at the first row of facades, acrd a wall height of 16-feet is constructed, the interior mise levels would comply with 45 d13 Ldn, with standard cOstniclion practices. 3 If two start'residences are constructed on the project site, it is recommendecl that interior noise levels arc evaluated for the entire project site when the buiIdiap elevations, floor plans and cons"ciion details'axe available. These conctusiotls are based on the traffic data pTcvided by CCS Planning and Fngincerirlg,lnc. and on noise reduction data for standard residential dwellings and for-typical STC rated window data. Bollard&Bremian,Inc_is mot responsibit;for degradation in acoustic perfarrrrance of tile,rr9identiat corlstruclioxl due to poor construction practices, failure to comply with applicable ouitding.code requirements,or for failtare to Adbera to 1110 minimum building practices cited in tfiis report. f101la1d 4 Brennan, Inc- - ,E•�e�i ro'cnx�n iul No vc.�naly.ri� Garden 7'Dmj Resldenrial Joaquin Corn!/ tbec 11 cf I!