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<br />. <br /> <br />FHWA-DP-45-]R, section 8 must be used for determination of the sound attenuation. <br />Subp.5, Equivalent methods. Methods equivalent to those described in subpart 4 may <br />be used provided they are approved by the commissioner of the Minnesota Pollution Control <br />Agency, The commissioner shall approve an altemative method if the commissioner finds <br />that the method will produce representative data and results which are as reliable as the <br />methods specified in subpart 4. <br /> <br />. <br /> <br />Statutory Authority: MS s ] 16.07 subds 2,4 <br />History: I] SR43;L 1987c 186s 15; 18SR614 <br /> <br />7030,0080 VARIANCE. <br />If, upon written application of the responsible person, the agency finds that by reason of <br />exceptional circumstances strict conformity with any provisions of any noise rule would cause <br />undue hardship, would be unreasonable, impractical, or not feasible under the circumstances, <br />the agency may permit a variance upon the conditions and within the time limitations as it may <br />prescribe for the prevention, control, or abatement of noise pollution in harmony with the intent <br />of the state and any applicable federal laws, <br /> <br />Statutory Authority: MS s 116.07 subds 2,4 <br />History: II SR43;]8 SR614 <br /> <br />. <br /> <br />. <br /> <br />25 <br />