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<br />9.644 <br /> <br />Eugene Code <br /> <br />9.644 <br /> <br />(a) Maximum one-hour equivalent sound pressure levels: <br />A-Weighted, (dBa), <br />Rece.i vinCI Property Ion; nQDistrict <br />Time of Day Residential I-I Commercial <br />7am - 10 pm 57 65 65 <br />10 pm - 7 am 50 65 60 <br />In the event the receiving property is occupied by a dwelling, <br />hospi ta 1, schoo 1, 1 i brary or nurs i ng home, even though it may be <br />otherwi se zoned for cOfllltlerci a 1 or i ndustri a 1 and re 1 ated uses, <br />maximum one-hour equivalent sound pressure received shall be: <br />Time of Day level <br />7 am - 10 pm 57 <br />10 pm - 7 am 50 <br />(b) ~istin9 Uses. Noise emissions from uses existing as of <br />January 27, 1982, that exceed prescribed maximums shall comply with <br />those maximums within 24 months th.ereof. <br />(e) Noises. of short duration. For noises of short duration <br />or impulsive character, such as hammering, maximum one-hour sound <br />pressure levels permitted beyond the property of origin shall be <br />seven deCibels less than those listed in section 9.644(a). <br />(d) Noises of unusual periodic character. For noises of <br />unusual periodic character, such as humming, screeching, and pure <br />tones, the following median octave band sound pressure levels, as <br />required by the Oepartment of Environmental Ouality, shall not be <br />exceeded beyond the property of origin when the receiving property <br />is residentially zoned or is occupied by a dwelling. hospital. <br />school. library, or nursing home: <br /> <br />1. Median Octave Band Sound Pressure levels <br /> <br />Octave Band Center <br /> <br />Frequency. Hz 7am-lOpm lOpm-7am <br />~.5 . ~ ffi <br />63 65 62 <br />125 61 56 <br />250 55 50 <br />500 52 46 <br />1 , 000 49 43 <br />2,000 46 40 <br />4.000 43 37 <br />8.000 40 34 <br /> <br />2. Additionala.llowance. When the receiving property <br />is not occupied by a dwell tng , hospital, school. library, or <br />nursing home,. an additional sound decibel emission above the <br />pressure levels specified in section9..644(d)1.above shall be <br />permitted as follows: <br /> <br />9-208 <br /> <br />12/23/93 <br />