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-�. Mr. Kevin Kain—Bituminous Roadway5 Rosevilie Asphal[ Plant August 11, 2010 Page 4 of 10 � site and more tha� one crusher may operate at a time. The EAW nolse analysis does not appear to consider this. We have calculated the distances from the various activitles on the proposed Bituminous Roadways site and adjacent property. We calculated the impacts of one, two three and four crushers on the adjacent properties using the following formula: dB(A) = 10 x Log�p{l0io + l0io +•�� 10�o)dB The EAW did not provide a site plan for the proposed Bituminous Roadways site. To determine potentiai trusher locations we �sed a preliminary site plan presented at a May 6, 2009 Roseville Planning Gommissfon meeting (Attached). We assumed the crushers could be located near any activity on the proposed site because the permit does not prescribe where the crushers can be locaied. We measured the distance from the potential crusher locaqons to our property, our buiiding and the center of the building. We made similar measurements for other nearby properties. 7o calculate the noise levels for one crusher, we used the equation provided in the EAW: dB�a)3 = d BIA)i — 201ogio (��/��) Our talculat(ons assume 82 dB(AJ at a distance of 50 feet (rom the crusher. For two crushers we used ^ the formula for summing dB�A) levels and added tAe crusher from the site indicated with the averege d8(A) level For all crusher noise impacts at thai location, The three crusher sum includes the high a�d low trusher while the four crusher sum includes the crusher inditated and the high, average and low crusher values to estimate the Impac[s of several crushers located at proposed site. Attachment 2 provides our results. One crusher located at the asphalt rubble pile violates the L50 noise standard for commercial property at our property line. Three and four crushers opereting simultaneously would violate the l50 standard at our building, even though our analysis does not consider the impacts of other equipment operating simultaneously with the trushers such as tonveyor bel[s, front end loaders, trucks, dust collec[or fans and dryers. Our analysis shows violations of the commercial L50 standard at the Walnut Street Warehouse, International Paper, Otd Dutch Foods, and Bonestroo Rosene Anderlfk. . The EAw d(d not consider the noise impacts irom truck and reil traffic which can be significant. 7ypical nolse levels from heavy dury trucksat SO feet can range from 76 dB(A) at 10 miles per hour to over 86 dB�A) al SO miles per hour. The most recent 2009 Minnesota Department of Transportation (MNDOT) averege daily tre�c volume numbers show 3,700 vehides per day on Terminal Road and 3,000 vehicles per day on Walnut Street. The increased truck troffic from the proposed 8ituminou5 Roadways plant will increase traffic on Terminal Road by 15% and on Walnut Street by 189'0. A 10% increase in traffic volume increases noise levels by D.5 dB a�d a 20Yo increase in Ira�c volume increases noise levels by 1.0 d8. Nolse levets will 1521 4VESTHIL�NCH DRIVE • SUf7E ]00 • M<LEAN, VA 22102 • TELFJ'HON[ 7WQB7•5800 • FAX�703487-5801 wh�w.yladnlonemmmerdal.mm I wwvt,gladstonecnmoanir mm