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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&EST'D.SOUND LEVEL PWL or SPL in dB Per Octane-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 4 112 <br /> PWL of4Units 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 /> 225 Hemispherical Radiation -45 -45 -45 -45 -45 -45 -45 -45 -45 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 0 -1 -2 -3 <br /> Source Sound Level Contribution 57 55 53 47 33 32 29 26 19 42 <br /> 2) PWL of Building Air Supply Fans(w/silencer) 91 95 91 87 75 i 69 65 63 58 ; 81 <br /> Men.Of Additional Noise Control 0 0 0 0 0' 0 0 0 0 <br /> Msc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 225 Hemispherical Radiation -45 -45 -45 -45 -45 -45 ..-45. -45 -45 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 ' 0 0 0 t-1 -2 -3 <br /> Source Sound Level Contribution 46 50 46! 42 30 24 20 17 10 36 <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 /> 325 Hemispherical Radiation -48 -48 -48 -48 -48 -48 -48 -48 -48 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 ' 0 0 0 -1 -2 -4 <br /> Source Sound Level Contribution 45 41 40 30 18 12 9 10 8 27 <br /> 4) PWL of Substation 85 88 90 78 72 65 00 `, 55 50 77 <br /> NR of Noise Control 0 0 0 0 0 0 0 0 0 <br /> Wisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 450 Hemispherical Radiation -51 -51 -51 -51 -51 ' -51 -51 -51 -51 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 ` -1 -1 -3 -6 <br /> Source Sound Level Contribution 34 37 39 27 21 14 8 1 0 26 <br /> Est'd Total Contribution of Proposed Station 58 57 54 48 35 33 29 26 20 43.4 <br /> Table A: Est'd Contribution from Proposed Station at North P.L. (Pos. "N") <br /> Source No. SOURCE PWL&EST'D.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 '5000'1000'2000'4000'8000 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 /> Wisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 625 Hemispherical Radiation -54, -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 38 24 22 19 14 5 33 <br /> 2) PWL of Building Air Supply Fans(w/silencer) 91 95 91 87 75 69 65 ' 63 58 81 <br /> Men.Of Additional Noise Control 0 0 0 0 0 0 0 0 0 <br /> Wisc.Atten. 0 0 0 0 0 0 0 0 0 <br /> 625 Hemispherical Radiation -54 -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 37 41 37 33 21 "! 14 10 5 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 /> Msc.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 36 32 31 21 9 ! 2 0 0 0 18 <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 /> 450 Hemispherical Radiation -51 -51 -51 -51 -51 -51 -51 -51 -51 <br /> Atm.Absorption(70%R.H.,60 deg F) 0 0 0 0 0 ` -1 -1 -3 -6 <br /> Source Sound Level Contribution 34 37 39 27 21 14 8 1 0 26 <br /> Est'd Total Contribution of Proposed Station 49 48 46 40 27 24 19 ' 15 8 34.8 <br /> Table B: Est'd Contribution from Proposed Station at East P.L. (Pos. "E") <br /> B-1 <br />