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lk <br /> Enbridge Energy, LP Hoover&Keith, Inc. <br /> Waterloo Pump Station—Noise Impact Analysis RN 3083/JN 4796 <br /> APPENDIX B— Estimated Contribution of Station (10/10/14) <br /> Source No. SOURCE PWL&ESTD.SOUND LEVEL PWL or SPL in dB Per Octaee-Band Center Freq.(Hz) A-Wt. <br /> &Dist(Ft) CONTRIBUTIONS AT SPEC.DISTANCE "31.5'63 '125'250 '500'1000'2000'4000'8000 Level <br /> 1) PWL of Unenclosed Pumps&Piping(1 unit) 102 104 108 112 108 107 104 102 97 112 <br /> PWL of 4 Units 108 110 114 118 114 113 110 108 103 118 <br /> NR of Pump House Building -6 -10 -16 -26 -36 -36 -36 -36 -36 <br /> Nisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 675 Hemispherical Radiation -64 -54 -54 -54 -54 -54 -54 -54 -54 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 -1 -2 -5 -9 <br /> Source Sound Level Contribution 48 46 44 37 23 22 18 13 3 32 <br /> 2) PWL of Building Air Supply Fans(w/silencer) 91 95 91 87 75 69 65 63 58 81 <br /> Atten.Of Additional Noise Control 0 0 0 0 0 0 0 0 0 <br /> Nisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 675 Hemispherical Radiation -`54 -54 -54 <br /> -54 -54 -54 -54 -54 -54 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 .' 0 0 -1 -2 -5 -9 <br /> Source Sound Level Contribution 37 41 37 32 20 14 9 4 0 27 <br /> 3) PWL of VFD Vent.Noise/AC Noise 95 92 94 92 90 88 86 82 75 93 <br /> NR of VFD Exh.Silencer -2 -3 -6 -14 -24 -28 -28 -22 -15 <br /> ?Asc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 750 Hemispherical Radiation -55 -55 -55 -55 -55 -55 -55 -55 =55 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 -1 -1 -2 -6 -10 <br /> Source Sound Level Contribution 38 34 33 22 10 4 1 0 0 19 <br /> 4) PWL of Substation 85 88 90 ` 78 72 65 60 55 50 77 <br /> NR of Noise Control 0 0 0 0 0 0 0 0 0 <br /> Msc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 550 Hemispherical Radiation -53 -53 -53 -53 -53 -53 -53 -53 -53 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 -1 -2 -4 -8 <br /> Source Sound Level Contribution 32 35 37 25 19 , 12 6 0 0 24 <br /> Est'd Total Contribution of Proposed Station 48 47 45 39 26 23 19 14 7 34.0 <br /> Table C: Est'd Contribution from Proposed Station at South P.L. (Pos. "S") <br /> Source No. SOURCE PWL&EST'D.SOUND LEVEL PWL or SPL in dB Per Octa\e-Band Center Freq.(Hz) A Wt. <br /> &Dist(Ft) CONTRIBUTIONS AT SPEC.DISTANCE X31.5'' 63 '125 '250 '500'1000'2000'4000'8000' Level <br /> 1) PWL of Unenclosed Pumps&Piping(1 unit) 102 104 108 ' 112 108 107 104 102 97 112 <br /> PWL of 4 Units 108 110 114 118 114 113 110 108 103 118 <br /> NR of Pump House Building -6 -10 -16 -26 -36 -36 -36 -36 -36 <br /> Msc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 575 Hemispherical Radiation -53 -53 -53 -53 -53 -53 -53 -53 '-53 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 -1 -2 -4 -8 ' <br /> Source Sound Level Contribution 49 47 45 39 25 23 19 15 6 34 <br /> 2) PWL of Building Air Supply Fans(w/silencer) 91 95 91 87 75 69 65 63 58 81 <br /> Atten.Of Additional Noise Control 0 0 0 0 0 0 0 0 0 <br /> Nisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 575 Hemispherical Radiation -53 -53 -53 -53 -53 -53 -53 -53 -53 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 -1 -2 -4 -8 <br /> Source Sound Level Contribution 38 42 38. 34 22 15 10 6 0 28 <br /> 3) PWL of VFD Vent.Noise/AC Noise 95 92 94 92 90 88 86 82 75 93 <br /> NR of VFD Exh.Silencer -2 -3 -6 -14 -24 -28 -28 -22 '-15 <br /> Msc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 425 Hemispherical Radiation -50 -50 -50 -50 -50 -50 -50 -50 -50 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 -1 -1 -3 -6 <br /> Source Sound Level Contribution 43 39 38 28 15 9 6 7 4 24 <br /> 4) PWL of Substation 85 88 90 78 72 65 60 55 50 77 <br /> NR of Noise Control 0 0 0 0 0 0 0 0 0 <br /> Nisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 875 Hemispherical Radiation -57! -57 -57 -57 -57 -57 -57 -57 -57 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 -1 -1 -3 -7 -12 <br /> Source Sound Level Contribution 28 31 33 21 16 7 1 0 0 20 <br /> Est'd Total Contribution of Proposed Station 50 49 47 40 27 24 20 16 9 35.3 <br /> Table D: Est'd Contribution from Proposed Station at West P.L. (Pos. "W") <br /> B-2 <br />