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� Wenck <br />Wenck Associates, Inc. <br />1800 Pioneer Creek Ctr. <br />P.O. Box 249 <br />Maple Plain, MN 55359-0249 <br />(763) 479-4200 <br />Fax (783) 479-4242 <br />E-mail: wenckmp@wenck.com <br />TECHNICAL MEMORANDUM <br />Confidential Attorney/Client <br />Privileged Information <br />To: Thomas Zappia <br />Zappia & LeVahn <br />From: Tim Colliton, PE, CIH <br />Wenck Associates, Inc. <br />Re: Environmental Sound Survey <br />Recycle Crushing Plant <br />Wenck Project No. 0980-06 <br />Date: October 17, 2008 <br />This technical memorandum presents the summary of the environmental sound measurements <br />made at the residence at 1166 Rockstone Court in New Brighton, Minnesota. The purpose of the <br />measurements was to assess the environment in the back yard of the residence with and without <br />the recycle crushing plant operating. The measurements were made on September 9, 2008. <br />SUMMARY OF THE RESULTS <br />The measurement results are summarized below. During the measurements, weather conditions <br />were pleasant with moderate temperature, mostly sunny sky and calm wind. Aircraft over flights <br />and local train traffic did not materially affect the measurements. <br />Time & Condition <br />Sound Level, dBA <br />Comments <br />Lso <br />Lio <br />Operating — 0900 to 1100 <br />47.3 <br />50 <br />None <br />Nearby lawn service <br />Not Operating — 1200 to 1400 <br />45.2 <br />48.6 <br />activity sound interference <br />removed from data set <br />COMPARISON OF THE RESULTS WITH MINNESOTA RULES <br />Description of the Rules <br />These results are compared with the requirements of the Minnesota Rules pertaining to <br />community noise. The regulations are contained in Minnesota Rules, Chapter 7030 and are <br />• administered by the Minnesota Pollution Control Agency. The rules are summarized below: <br />Noise area classifications (NAC's) are defined for various types of land uses in the state. The <br />NAC's are numerically labeled from 1 through 4 and are described in Chapter 7030.0050. <br />T:\0980\06\Sound Survey Rcpon Memo.doc <br />