CCP 01-21-2003 - Laserfiche WebLink

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I I. I I I I I I I .. I I I I I I -. I I TABLE 21 TYPICAL CONSTRUCTION EQUIPMENT NOISE LEVELS AT 50 FEET Equipment Type Peak Noise Level Range (dBA) Average (dBA) Scraper 80-93 88 Dozer 72-84 80 Compactor 73-75 74 Truck 82-94 91 Source: From the most recent information published by the U.S. Environmental Protection Agency, Washington, D.C., Noise from Construction Equipment and Operations, Building Equipment and Home Appliances, December 31,1971. The actual noise levels that may be experienced near a construction zone depend on: . The distance between the construction equipment and the receiver. . The type of equipment in use. . The percentage of the time the equipment attains the peak level. . Noise control features incorporated into the equipment. In accordance with city ordinance 630.01, construction activities (i.e., construction noise) will be limited to daytime hours, from 7:00 a.m. to 9:00 p.m. during the week, and 8:00 a.m. to 9:00 p.m. on the weekend. Contractors will be required to ensure that equipment has been properly maintained and fitted with mufflers and other noise controls, as specified by the manufacturer. Traffic Noise Traffic is a common source of noise in a suburban setting and is rcgulatcd in Minnesota by the Minnesota Pollution Control Agency (MPCA) under Minnesota Statute 1 16.07 Subdivisions 2 and 4. The proposed project is located in a developing suburban setting with commercial, light industrial and residential land uses surrounding the project site. High traffic roads such as Lexington Avenue, Hamline Avenue and 1-694 arc located adjacent to or close to the project site to the east, west and south, respectively. A detailed noise analysis was completed to assess existing traffic noise levels in the project area and to determine what effect thc proposed project will have on fllture noise levels. The proposed project will increase traffic volumcs in some parts of the study area. Increases in traffic can rcsult in increascd noise levels, which can be perccived as an annoyance by adjacent residents. The noise analysis consisted of monitoring existing noise levels at adjacent residential receptor sites and predicting future noise levels using computer modeling. Guidant Campus 1'vfaster Plan Final AllAR and Mitigation Plan January 2003 - 48 -