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<br />.' <br /> <br />.. <br /> <br />170.017 PF.RFORMA~C'P. F:""NMRrY; <br /> <br />IN'1!'.NT: 'Ihese performance standards are designed to encourage a <br />high standard of development by providing assurance that <br />nei91boring land uses will be CUllplltible. All future development <br />in all districts shall be required to meet these standards. <br />~ese standards shall also apply to existing development when <br />stated. 2he zoning officer shall enforce these standards. <br /> <br />170.017A RJISANCES: No noise, odors, vibration, 8lIOke, glare, air <br />pollution, or dangerous wastes shall be created that exceed the <br />following limits. <br /> <br />(1) l<<>ISE: <br />SOOND LE.VEL IN DECIBELS ME'ASURED AT PROPERTY LINE <br /> <br />Octaves, Band <br />~cles/sec. <br />37.5 - 75 <br />76 - 150 <br />151 - 300 <br />301 - 600 <br />601 - 1200 <br />1201 - 2400 <br />2401 - 4800 <br />Over 4800 <br /> <br />ReSidential <br />Districts <br />58 <br />54 <br />50 <br />46 <br />40 <br />33 <br />26 <br />20 <br /> <br />NorrResidential <br />Districts <br />73 <br />69 <br />65 <br />61 <br />55 <br />48 <br />41 <br />35 <br /> <br />(2) axms: <br />Table III (OOOr 'Ihresholds in Olapter 5, -Air Pollution Manual-, <br />cOP,iright 1951 by Manufacturing Chemists Association, Inc., <br />Washington, DC). <br />(3) VIBRATICH>: <br />Any vibration discernible (beyond property line) to the human <br />sense of feeling for three minutes of more duration in anyone <br />hour and any vibration producing an acceleration of IlOre than 0.1 <br />g. or resulting in any combination of amplitudes and frequencies <br />beyond the -safe- range of Table 7, U.S. Bureau of Mines Bulletin <br />No. 442, "Seisnic Effects of Quarry Blasting-, on any structure. <br /> <br />(4) SKEE: <br />Any emission of visible snoke of a shade darker than No. 1 on the <br />Ringelmann Smoke Olart, as plblished by the u.s. Bureau of Mines, <br />except that visible grey smoke of a shade not darker than No. 2 <br />on said chart may be emitted for not more than four minutes in <br />any thirty minutes. <br /> <br />(5) AIR RLLDTIOO (Fly ash, dust, flllles, vapors, gasses, etc.): <br />Any emission which can cause any damage to health, animals, or <br />vegetation, or other forms of property, or which can cause any <br />excessive soiling at any point, and in no event any emission of <br />any solid or liquid particles in concentrations exceeding 0.3 <br />grains per cubic foot of the conveying gas or air at any point. <br />For measurement of the amount of particles in gasses resulting <br />from combustion, standard corrections shall be applied to a <br />stick temperature of 500 degrees Fahremeit and 50% excess air. <br /> <br />81 <br />