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<br />. <br /> <br />''''ILLER <br />tORPORATION <br /> <br />Tiller Corporatiol) <br />and its opemtillg divIsiolls <br /> <br />Corporate Office: <br />PO Box 1480 <br />noD Hemlock Lane, Suite 200 <br />Maple Grove, Mim,e.o;ota 55311 <br /> <br />Barton Sand & Gravel Co. <br />Conunel'cial Asphalt Co. <br />Barton Enterprises, Inc. <br /> <br />general: (763) 4254191 <br />facsimile: (763) 425~7153 <br />web: www.tillercorp.rom <br /> <br />February 8, 2007 <br /> <br />Rebecca Haug <br />City of Elk River <br />Environmental Administrator <br />13065 Orono Parkway <br />Elk River, MN 55330 <br /> <br />Re: Noise Assessment <br /> <br />Dear Ms. Haug: <br /> <br />. <br /> <br />Tiller Corporation (Tiller) and its operating division Barton Sand & Gravel Co. engaged <br />. David Braslau' Associates Incorporated to conduct a noise assessment (enclosed) of our <br />facilities. in the city of Elk River. Among other things, the purpose of the assessment was to <br />(1) monitor noise levels from existing operations relative to Minnesota daytime noise <br />standards, (2) predict noise levels from future operations as equipment moves closer to <br />property boundaries and (3) detennine compliance with Minnesota's nighttime noise <br />standards. Following is a brief summary of the assessment. <br /> <br />Existin2 Operations <br />Noise levels from equipment that processes and washes sand and gravel was measured near <br />residences closest to the equipment. The noise levels measured show compliance with the <br />allowed state daytime noise standards. <br /> <br />Future Operations <br />As operations move toward the boundaries of the facility, equipment may be closer to <br />residences. Modeling was used to predict noise levels at different locations near residences. <br />The predicted noise levels also show compliance with the allowed state daytime noise <br />standards. <br /> <br />. <br /> <br />Compliance with Ni2httime Standards <br />The assessment shows that compliance with nighttime noise standards can be achieved with <br />slight modifications to existing conditions. Because Tiller is requesting permission to <br />operate during a time period when nighttime noise standards apply, it is Tiller's intention to <br /> <br />This Company is an Equal Opportunity Employer <br />