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299 NOISE POLLUTION CONTROL 7030.0050 Subp. 8. Lso. "Lso" means the sound level; expressed in dB(A), which is exceeded SO percent of the time for a one hour survey. as measured by test procedures approved by the commissioner. Subp. 9. Municipality. "Municipality" means a county; a city; a town; a regional plan- ning and development commission established under Minnesota Statutes, chapter 473; the metropolitan council; or other governmental subdivision of the state responsible by law for controlling or restricting land use within its jurisdiction. Subp. 10. Nighttime. "Nighttime" means those hours from 10:00 p.m. to 7:00 a.m. Subp. 11. Person. "Person" means any human being. any municipality or other govern- mental or political subdivision or other public department or agency. any public or private corporation, any partnership, finn. association, or other organization. any receiver. trustee. assignee. agency. legal entity, other than a court oflaw. or any legal representative of any of the foregoing. but does not include the agency. Subp. 12. Sound pressure le\'el. "Sound pressure lever'. in decibels. means 20 times the logarithm to the base 10 of the ratio of the pressure to the reference pressure. The refer- ence pressure shall be 20 micronewtons per square meter. Statutory Authority: MS s 116.07 subds 2.4 History: II SR 43: L /987 c /86 s /5: /8 SR 6/4 7030.0030 NOISE CONTROL REQUIREMENT. No person may violate the standards established in part 7030.0040, unless exempted by Minnesota Statutes, section 116.07. subdivision 2a. Any municipality having authority to regulate land use shall take all reasonable measures within its jurisdiction to prevent the es- tablishment of land use activities listed in noise area classification (NAC) 1.2, or 3 in any location where the standards established in part 7030.0040 will be violated immediately upon establishment of the land use. Statutory Authority: MS s 116.07 suhds 2.4 History: /I SR 43: /8 SR 6/4 7030.0040 NOISE STANDARDS. Subpart I. Scope. These standards describe the limiting levels of sound established on the basis of present knowledge for the preservation of public health and welfare. These stan- dards are consistent with speech, sleep, annoyance. and hearing conservation requirements for receivers within areas grouped according to land activities by the noise area classification (NAC) system established in part 7030.0050. However, these standards do not, by them- selves, identify the limiting levels of impulsive noise needed for the preservation of public health and welfare. Noise standards in subpart 2 apply to all sources. Subp. 2. Noise standards. Noise Area Classification Daytime Nighttime I 2 3 Lso 60 65 75 LIO 65 70 80 Lso LIO 50 55 65 70' 75 80 Statutory Authority: MS s 1/6.07 subds 2.4 History: 1/ SR 43; /8 SR 614 7030.0050 NOISE AREA CLASSIFICATION. Subpart 1. Applicability. The noise area classification is based on the land use activity at the location of the receiver and detennines the noise standards applicable to that land use activity unless an exception is applied under subpart 3. Subp. 2. Noise area classifications. The noise area classifications and the activities in- cluded in each classification are listed below: Integrated Loss Control, Inc. · (612) 783-9581