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<br />9 . 644 <br /> <br />Eugene Code <br /> <br />9.644 <br /> <br />(') <br />.: ,,7 <br /> <br />(a) Maximum one-hour equivalent sound pressure levels: <br />A-Weighted. (dBa). <br />. Recei vi no Propert y Zoni no Di stri ct <br />Time of Day Residential I-I. Commercial <br />7 am - 10 pm 57 65 65 <br />10 pm - 7 am 50 65 60 <br />In the event the recei vi ng property i s occupi ed by a dwe 11 i ng . <br />hospital. school. library or nursing home. even though it may be <br />otherwi se zoned for commerci a 1 or i ndustri a 1 and related 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) Existinq 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 thereof. <br />(c) 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 sha 11 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 Department of Environmental Quality, 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 />. '\ <br />,', <br />~;, <br /> <br />Octave Band Center <br /> <br />Frequency. Hz 7am-l0pm 10pm-7arn <br />31.5 68 65 <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. Addi t i ana 1 allowance. When the rece; vi ng property <br />is not occupied by a. dwelling, hospital, school, library, or <br />nursing home. an additional sound decibel emission above the <br />pressure levels specified in section 9.644(d)1. above shall be <br />perrnittedas follows: <br /> <br />,*, <br /> <br />9-208 <br /> <br />.'. _,::i <br />J <br /> <br />12/23/93 <br />