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I I I I I I I I I I I I I I I I I I I 'n1e traffic volumes and vehicle c1assificatioos used in this noise analysis were based CI1 the traffic report contained in ~ A. 'n1e mise predictions made in this sectiCl1 are primarily highway-related mise predictions for the traffic can:litions durinJ the year bein;)' analyzed. It was as.~111'IFrl that the P.M. peak-hror volumes and conespaI~ speeds for ttu:::.ks and a\l't:a1d)iles result in the misiest can:li tions. D.Jrin;)' all other tiJre periods, the mise levels shoold be less than those irrlicated in this analysis. However, sin::e the prcp:sed hotel will generate traffic durirg the 6-7 A.M. period, the mise iIIpacts at all of the receptors duri.rg that pericxi were analyze:i. As shown in Table 5,' the MPCA noise starrlards are JlX)re strirgent for residential lard uses durirY:J the tiJre pericxi fram 10 P.M. to 7 A.M. with the 6-7 A.M. pericxi beiJ'g the met critical. In the follC7to1in; evaluation of noise inpacts, ~isons will be made on a receptor by receptor basis between the pra:ticted 1995 "pretl am "}X)St" developnent noise levels for the tine periOOs analyzErl. COmparisons will also be made with the awlicable MICA noise starrlards. Evaluation of Boise IIIpacts '!he prcp:sed Centre Pointe Business Park is located in an area of intense t.ruckirY:llwarehcusirg activity. Sane of the IOCIre ooise sensitive receptors in the area in::1u:le residential land uses located east of Clevelarrl Avenue and south of County Road D. '!he mise envi.ranTent is daninated by traffic on I -35W, Cleve1ard AveruJe, am County Read D. Tables 6 and 7 describe the lam use, the awlicable MPCA criteria am the IID1ritored and predicted L(lO) and L(50) traffic noise levels at each receptor locatiCl1 for the P.M. peak hoJr arrl 6-7 A.M. periods, respectively. These tables are referred to but not specifically referenced in the followirg rH ~1SSiCl1. Receptor A is the proposed hotel on the Centre Pointe site. At approximately 200 feet east of the oo:rtbl:x:mrl lanes of I-35W, IIDnitored am. predicted exist:i.rg P.M. peak haIr noise levels are 69 dBA or higher on the L(10) level and 65 dBA or higher 00 the L(50) level. 'lhese noise levels are in excess of the MPCA daytiDe starrlards. Predicted 1995 noise levels for b::1th the P.M. peak hour and 6-7 A.M. periods will also be in excess of the MPCA stan::lards. However, the ooise irx::reases fran pre- to post-developnent will be a negligible 0.1 dBA for the 6-7 A.M. pe.ricxi. No increase is anticipated for the P.M. peak haIr. '!he future exterior nighttime noise levels are rot of sufficient magnitude to affect the interior mise levels of bJildi.rgs constrocted with tcx:1ay's state-of-the-art t.eclmiques. Typical ma.terials used in construction of builcti.rgs suc:tl as the prqx:sed hotel will reduce interior noise levels by 20-25 dBA if designed with sealed windows and central lNAC systems. 'n1erefore, the resultirg interior noise level for ne\ot1 construction of the type mentioned above shoold be below the rerognizaj nighttime sta.rrlard for sleep:i.rg quarters of 45 dBA. 18