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<br />tittrl.. <br />I,'''. . <br /> <br />".:' . <br /> <br />e e <br />Md1muitl' Snunci,r~vels,',(Dao1bels;" ' <br /> <br />f.' <br />ill <br /> <br />Oct aGe Band Pre~uenc1 <br />.J.CJ:Cl~s Pel' Se,condl~"" <br />20 to 7$ <br />?S to l'SO .- .! <br />lSO to 300 <br />300 to 600 <br />600 to 1200 <br />1200 to 2400 <br />2400 to 2800 <br />Abovft 4aOO <br /> <br />Ctllumn t <br />Lut, L~.ne <br /> <br />Col\Ulm I% <br />Residential Diet. ~, <br />72 <br />,':'~ <' 67 <br />59 <br />52 <br />4S <br />4J <br />~ <br />)2 <br /> <br />7$ <br />70 <br />62 <br />~~ <br />43 <br />37 <br />3.$ <br /> <br />- <br />'. ,,' , - '- <br />E. . Impaot nolsesaa measured ~n the impact noise analyzer -.-, - <br />Dball not exceed an over-all level of.s~!enty-tive (7S) doo- <br />1bels at any Residential Distriot boundRr7. <br />, . <br /> <br />c. Between the hours ot 10:00 p.m. and 6:00 a.m., the per- <br />ndssible sound levels beyond any Residential Distriot bound- <br />ar, (both Column II and Impact) shall be six (6) decibels le8s <br />than shown above, <br /> <br />D. Sound levels shall be measured with a Hound level motel' <br />an4 dssooiate4 octave band tilter manufactured aooording to <br />standards presoribed by the Amerioan Standards Association. <br />Measurements shall be made, neglecting background noises, <br />using the flat network and the slow position at the sound <br />level meter. ,Impact noises shall be measured with tbe i~act <br />noise analyzer in conjunction with the sound level me~er., Tb3 <br />measurement reters to the positive peak value. <br /> <br />2.. Ylbration: <br />t. ' I.-!l An'6 industrial operation or aotivity wbich shall cause at <br />aDy time and at any point beyond a Commercial District bound- <br />BrY line eartbborne vibrations in excess ot the limits set <br />forth in Column I is prohibited. In addition, any industrial <br />opeeation or activity which shall cause at any time and at ani <br />point beyond a Residontial District boundary line eartbborne, <br />vibrations in excess ot the limits set torth in Column II is <br />probibited. Vibration shall be axpressed in' inohes and sball <br />be measured with a th~ee-component measuring system approved <br />b" tbe zoning administrator. <br /> <br />Pl'equency <br />(CHclesPer Second) <br />o to 10 <br />10 to 20 <br />20 to 30 <br />30 to 40 <br />40 and over <br /> <br />Colwnn 1* <br />Displacement <br />(Inohes) <br /> <br />0.0008 <br />O.oooS <br />0.0002 <br />0.0002 <br />0.0001 <br /> <br />Column II* <br />Displacement <br />( Inches) <br /> <br />0.0004 <br />0.0002 <br />0.0001 <br />0.0001 <br />0.0001 <br /> <br />3, Smoke and Pa:r~lculat~ Matter: <br />A. , Smoke tromaiij'VGnt, staclt, chimney, skylight, window, <br />~~~~4~QS opening, or combustion process shall not exceed an <br />~~ot R1nglemarul No. 2 a3 observed on the Ringlemann <br />Cbart_ However, once d~rlrig any th~ee (3) hour periOd, Ringle- <br />mann No. 3 will be permitted but not in excess of five (S) <br />mnutes. <br /> <br />B. , The emission ot particulate ~a~tor tr~m all sources sball <br />not exceed ten ,(10) pounds per ao~e of pro~erty 4uring anJ <br />one (1) hour. <br /> <br />C. Any use already extabJ.!shed on tbe erteotive date of tbis <br />ordinance shall be pormitted to be altered, enlarged, expanded, <br />or modified, provided that the new source ot smoke and/or . <br />particulate matter contor.ma to,tbe pertormanoe standards. The <br />total emission we1abt ot partioulate matter and amoke from all <br />souroe. within the boundaries ot the lot vball not exoeed tbe <br />net amount permitted atter suob alteration, enlargement, .S~ <br />pansioD or moditioation. <br />-25- <br /> <br />I I',{ <br />