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Table 5: Common Noise Sources and Average Sound Levels ' <br /> Noise Source Sound Pressure Level (dBA) 1 <br /> Jet Engine(at 25 meters) 140 <br /> Jet Aircraft(at 100 meters) 130 1 <br /> Rock and Roll Concert 120 <br /> Pneumatic Chipper 110 ' <br /> Jointer/Planer 100 <br /> Chainsaw 90 <br /> Heavy Truck Traffic 80 <br /> Business Office 70 <br /> Conversational Speech 60 <br /> Library 50 ' <br /> Bedroom 40 <br /> Secluded Woods 30 <br /> Whisper 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 /> 1 <br /> Environmental Assessment <br /> PUC Docket E002/TL-11-223 Page 26 <br />