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EXHIBIT L <br /> EDWARD L. PACK ASSOCIATES, INC. <br /> 1975 HAMILTON AVENUE L_ cost/w/ if mtdlon[s TEL 408-371-1195 <br /> SUITE 26 FAX: 408-371-1196 <br /> SAN JOSE CA 90'5 VVV.NV.packassociates.corn <br /> May 102011 <br /> Project No. 41-01 1-3 <br /> Mr. David J. DiDonato <br /> Donato Builders <br /> 1854 Warsaw Avenue <br /> Livermore. CA 94550 <br /> Subject: Interior Maximum Noise Levels- Single-Family Developmenl- <br /> Stanley Boulevard. Pleasanton <br /> Dear Mr. DiDonato: <br /> This report will provide so.' with the interior noise levels in the planned homes from trait- <br /> horn blasts. Shown in Fible 1- below. are the niaxirtuni noise levels in the Master <br /> Bedrooms and in the Sec a nd Bedrooms of worst-case Lets 6. 7 and 8 and in the best-case <br /> Lot 1, All of these room: are on the second floors of the homes. Shown in the Table are <br /> the lot numbers. the plan type- the maximum sound level at the exterior of the building. <br /> the recommended STC ratines of the windows. the noise reduction of the train horn noise <br /> provided by the building shell and the interior sound levels. A range of train horn <br /> maximum noise levels is show n as the horn noise levels vary at any given location due to <br /> variations in intensity of the horn blast and location of the train when the horn is sounded. <br /> TABLE <br /> Trlin Horn Interior Maximum Noise Levels. dBA <br /> r \\indo■■ lincrior Sound <br /> Plan Vleas Sound Mu. , Sound Lc rJ ';Mink Noise <br /> 1oM SIC [incl. IRA <br /> T <br /> pe I.excl LIMA III.I. ar Sciback I t Raluclinn <br /> Reline I <br /> I B d Bed 2�i <br /> 6_S 59-1 I2 dB a f. 92-115 dBA 5711. 4C 1 41 dB 44-67 51-74 <br /> 7 2 S9-112 LIRA 75 11. L)2-1 1 s dBA 57 lk. 46 41 dB 51-74 45-6S <br /> • <br /> 1 I I 89-112 dBA I 75 tt 722-9 dBA 1 28 20 dB 41-64 52-75 <br /> MEMBER ACOUSTICAL SOCIETY 0 AMERICA NATIONAL COUNCIL OF ACOUSTICAL CONSULTANTS <br />