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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Minnesota noise standards are listed by time of day and land use in the following <br />table. <br />MINNESOTA NOISE STANDARDS <br />Daytime, 7 a.m. to 10 p.m. Nighttime, 10 p.m. to 7 a.m. <br /> <br />Land use LIO (dBA) LSO (dBA) LIO (dBA) LSO (dBA) <br />Residential 65 60 55 50 <br />Commercial 70 65 70 65 <br />Industrial 80 75 80 75 <br /> <br />Noise impacts from construction of the development may exceed the state noise <br />standards for a limited period of time. Every effort will be made to reduce <br />construction noise by ensuring that all equipment has proper noise reduction <br />devices. In addition, construction activities will occur only during daytime hours. <br /> <br />According to the MPCA, noise monitoring, is recommended, although not required: <br />· To establish baseline levels and indicate if a noise problem already exists. <br />· To calibrate the noise analysis model, thereby lending greater reliability to its <br />estimates. <br /> <br />Noise monitoring was conducted at the intersections of County Road C and <br />Cleveland and County Road D and Cleveland on December 29,2000. The noise <br />monitoring was done using an Ametek Model Mark 3 Audio Dosimeter. <br /> <br />It can be seen from the results of the noise monitoring that current traffic noise <br />levels currently exceed the Minnesota Residential noise standards at County Road D <br />and Cleveland. Although residential areas are located significantly far from the <br />intersection of Cleveland and County Road C, residences are located in the <br />southeast quadrant of Cleveland and County Road D. Refer to the following table <br />for noise monitoring results. <br />TRAFFIC NOISE MONITORING <br /> <br />Monitoring Daytime (7-9 a.m.) Nighttime (4:30-6:30 <br /> LIO (dBA) LSO (dBA) LIO (dBA) LSO (dBA) <br />Intersection of 74.24 64.40 69.2 60.0 <br />Cleveland and <br />Co. Rd. D <br />Intersection of 71.3 64.9 71.9 62.4 <br />Cleveland and <br />Co. Rd. C <br /> <br />Noise impacts from post-project traffic volumes were evaluated using the <br />STAMINA 2.0 (FHW A 1982) model provided by MnDOT. STAMINA 2.0 <br />predicts A-weighted noise levels (LEQ, L 1 0, L50 and L90) based on traffic volume, <br />speed, and vehicle type. For this analysis, vehicles were placed into three <br />categories: cars, medium trucks, and heavy trucks. <br /> <br />Page 28 <br /> <br />----------- <br />