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7 NOISE POLLUTION CONTROL 7030.0060 <br />C. The standards for a building in a noise area classification 3 <br />a noise area classification 1 if the following conditions are met: <br />(1) the building is constructed in such a way that the <br />attenuation is at least 40 dB(A); <br />(2) the building has year -round climate control; and <br />(3) the building has no areas or accommodations that are <br />D. The standards for a building in a noise area classification 3 <br />a noise area classification 2 if the following conditions are met: <br />(1) the building is constructed in such a way that the <br />attenuation is at least 30 dB(A); <br />(2) the building has year -round climate control; and <br />(3) the building has no areas or accommodations that are <br />Statutory Authority: MS s 116.07 <br />History: 11 SR 43; 18 SR 614 <br />Published Electronically: December 12, 2003 <br />7030.0060 MEASUREMENT METHODOLOGY. <br />Copyright ©2003 by the Revisor of Statutes, State of Minnesota. All Rights Reserved. <br />shall be applied to a building in <br />exterior to interior sound level <br />intended for outdoor activities. <br />shall be applied to a building in <br />exterior to interior sound level <br />intended for outdoor activities. <br />Subpart 1. Measurement location. Measurement of sound must be made at or within the applicable <br />NAC at the point of human activity which is nearest to the noise source. All measurements shall be made <br />outdoors. <br />Subp. 2. Equipment specifications. All sound level measuring devices must meet Type 0, I, II, or <br />S specifications under American National Standards Institute S1.4-1983. <br />Subp. 3. Calibration. All sound level measuring devices must, at a minimum, be externally field <br />calibrated before and after monitoring using a calibration device of known frequency and sound pressure <br />level. <br />Subp. 4. Measurement procedures. The following procedures must be used to obtain representative <br />sound level measurements: <br />A. Measurements must be made at least three feet off the ground or surface and away from <br />natural or artificial structures which would prevent an accurate measurement. <br />B. Measurements must be made using the A- weighting and fast response characteristics of the <br />sound measuring device as specified in American National Standards Institute S1.4-1983. <br />C. Measurements must not be made in sustained winds or in precipitation which results in a <br />difference of less than ten decibels between the background noise level and the noise source being measured. <br />D. Measurements must be made using a microphone which is protected from ambient <br />conditions which would prevent an accurate measurement. <br />Subp. 5. Data documentation. A summary sheet for all sound level measurements shall be <br />completed and signed by the person making the measurements. At a minimum, the summary sheet shall <br />include: <br />