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s1.1-1960 (R1976), section 2.6. <br />I <br />7010.0030 NOISE CONTROL REQUIREMENT. <br />No person may violate or allow any act that results or will <br />result in violation of the standards established in part <br />7010.0040. <br />7010.0040 NOISE STANDARDS, <br />Subpart 1. Scope. Noise standards are expressed in terms <br />of sound pressure level and apply to sounds that have a duration <br />of at least 200 milliseconds. Noise standards in subpart 2 <br />apply to all sources. For airports, the additional noise <br />standards in subpart 3 also apply. <br />Subp. 2. Noise standards. <br />Noise Area Nighttime <br />Classification Daytime 9 <br />1 63 Leq 53 Leq <br />2 68 Leq 68 Leq <br />3 78 Leq 78 Leq <br />Subp. 3. Additional airport noise standards. An Ldn of <br />63, 68, and 78 for NAC 1,2,3, respectively, also applies to <br />airports. <br />7010.0050 NOISE AREA CLASSIFICATION. <br />subpart I. Applicability. The noise area classification <br />is based on the land use activity at the location of the <br />receiver and determines the noise standards applicable to that <br />land use activity unless an exception is applied under subpart 3. <br />Subp. 2. Noise area classifications. The noise area <br />cl <br />