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- _ - 31 <br />Attachment 3 <br />Environmental Sound Page 16 <br />The Wake County genera] ordinance is based on L10 but requires too few measurements for reasonable <br />accuracy. Tt is unclear in other ways. <br />The City of Durham has a general ordinance thatis also referenced as a performance standard in the City- <br />County Zbningcode. This ordinance has an unusual requirement setting what would normally be residential <br />limits on all sources regardless of the neighboring property use.. Thus, a factory surrounded by other <br />factories still has to meet low noise limits at its boundaries, Contrasted to this is the situation in Rowan <br />County and the City of Greenville, There the Ihnits are set solely on the use ofthe source property so that <br />industrial properties only have to meet high limits even if they have residences next door. Wilmington is <br />unclear on this, <br />Community Noise Ordinances in North Cazolina, limits are A-weighted sound levels. <br />Community Limits for Sound into Residential Areas <br />From Residential From Industrial Night period, Enforcement <br />Day Night Day Night Measurement Tecfuuques <br />Apex 55 46 66 45 <br />Limits apply ID ft from boundary, Maxunum Level limit 10 d6 higher <br />Boone 6D SD 6D 50 <br />some evening 70 70 70 70 <br />Cary 6D 60 60 60 <br />60 dBA at night for ampli5ed sound <br />Chapel Hill 50 45 50 45 <br />Also includes third-octave limits <br />sources extisting before 60 50 <br />924/2001 60 50 <br />Chatham County 60 50 60 50 <br />Clayton 55 45 63 55 <br />Maximum level limit ID dB higher <br />Cumberland Co. 60 55 60 55 <br />Maximum level limit 15 dB higher <br />Davidson 70 55 70 55 <br />Nigh[ starts I am on weekends <br />Durham 6D 50 6D 50 <br />City general ordinance referenced in both city & county caning codes <br />Fayetteville 60 55 60 55 <br />Max~mmn level limit I S dB higher <br />Also has Octave-Band Limits <br />Gamer 60 55 60 55 <br />5 dB less if tonal or repetitive impulsive <br />Greenville 60 55 76 76 <br />some everting 70 70 <br />1 Opm-lam, Not specified <br />L10 IOD Mess, t0 sea apart <br />l lpm-lam, Police Pep[ <br />Maximum Level Limits Only <br />9pm-gam, Police <br />Maximum Level Limits Only <br />l lpm-lam, Police Dept. <br />Maximum Level Limits Only-. <br />l ]pm-Baru <br />lOpm-Bum Sheriff <br />Maximum Level limits ordy.. <br />l lpm-'7am, Police Dept, <br />LID IOOMeas. I0 sea. apart <br />]Opm-lam, Health Dept. <br />L10, Measured ova 10 mm. <br />1lpm-gam, Police Dept <br />Mexrmum Level Limits Only <br />11pm-Berm Uncleaz <br />Maximum Level L imits Only <br />1 Dpm-ham, Police Dept <br />L 1 D 120 Meas.. 5 sec. apart. <br />lOpm-lam, Zoning Code <br />Ll D 100 Meas. 10 sec. apart <br />I lpm-lam, Police Aept. <br />Maximum Level Limits Only, <br />