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Table 5: Common Noise Sources and Average Sound Levels <br />Noise Source <br />Sound Pressure Level (dBA) <br />Jet Engine (at 25 meters) <br />140 <br />Jet Aircraft (at 100 meters) <br />130 <br />Rock and Roll Concert <br />120 <br />Pneumatic Chipper <br />110 <br />Jointer/Planer <br />100 <br />Chainsaw <br />90 <br />Heavy Truck Traffic <br />80 <br />Business Office <br />70 <br />Conversational Speech <br />60 <br />Library <br />50 <br />Bedroom <br />40 <br />Secluded Woods <br />30 <br />Whisper <br />20 <br />Source: Minnesota Pollution Control Agency, 2008 <br />Noise standards in Minnesota have been established and are defined in Minnesota Rule 7030 and <br />regulated by the MPCA. The Noise Control Requirement states that noise contributors shall comply <br />with the Noise Area Classifications (NAC) established in Minnesota Rules part 7030.0040, which are <br />shown in Table 6. The NAC is based on land use activity at the location of the receiver. For <br />example, household units are defined under NAC (1), bus passenger terminals are defined under <br />NAC (2), and transportation right-of-way is defined under NAC (3). NAC (1) also includes other <br />noise -sensitive areas such as medical and other health services, religious services, educational <br />services and camping areas. <br />Environmental Assessment <br />PUC Docket E002/TL-11-223 Page 26 <br />