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OCTA I Santa Ana/Garden Grove Fixed Guideway Project <br />FNNoise and Vibration Technical Addendum <br />Table E: Comparison of the 30 Percent Design and 60 Percent Design Alignment Audible <br />Warning Noise Levels (d BA) <br />Receiver <br />Land <br />Use <br />Cat. <br />30% Design <br />Alignment Distance <br />to Track Centerline <br />(ft) <br />60% Design <br />Alignment Distance <br />to Track Centerline <br />(ft) <br />30% Design <br />Alignment <br />Audible <br />Warning Noise <br />Level <br />60% Design <br />Alignment <br />Audible <br />Warning Noise <br />Level <br />Change in <br />Streetcar <br />Operations <br />Noise Level <br />R8 <br />3 <br />92 <br />85 <br />65 <br />65 <br />0 <br />R9 <br />3 <br />401 <br />370 <br />63 <br />63 <br />0 <br />R11 <br />1 3 <br />1 165 <br />1 115 <br />1 59 <br />1 60 1 <br />+1 <br />R10 <br />2 <br />49 <br />66 <br />69 <br />68 <br />-1 <br />R12 <br />2 <br />30 <br />58 <br />73 <br />72 <br />-1 <br />R13 <br />2 <br />60 <br />78 <br />69 <br />68 <br />-1 <br />Source: HDR (June 2016 and February 2017). <br />COMBINED EFFECT <br />Table F lists the noise levels calculated by HDR (June 2016) for the 60% design. Table G <br />provides a comparison between the noise levels calculated for the 30% and 60% design <br />streetcar alignments. The impacts for the 60% design are the same as those for the 30% <br />design. <br />Table F: 60 Percent Design LPA Train Operation Noise Levels <br />NSA <br />Rec. <br />Land <br />Use <br />Cat. <br />Existing <br />Noise <br />Level <br />(d BA) <br />Streetcar <br />Ops <br />Predicted Project Only Noise <br />Ldn or Lday (d BA) <br />Audible <br />Warning Crossing O&M <br />Level <br />Overall <br />Project Noise <br />Impact <br />(Priorto Mitigation) <br />R1 <br />2 <br />53 <br />56 <br />N/A <br />N/A <br />N/A <br />56 <br />Moderate Impact <br />1 <br />R2 <br />2 <br />52 <br />51 <br />N/A <br />N/A <br />N/A <br />51 <br />No Impact <br />R3 <br />2 <br />51 <br />52 <br />N/A <br />N/A <br />N/A <br />52 <br />No Impact <br />2 <br />R4 <br />2 <br />50 <br />52 <br />N/A <br />N/A <br />N/A <br />52 <br />No Impact <br />R5 <br />2 <br />51 <br />54 <br />N/A <br />N/A <br />N/A <br />54 <br />Moderate Impact <br />3 <br />R6 <br />2 <br />52 <br />59 <br />N/A <br />N/A <br />N/A <br />59 <br />Moderate Impact <br />R7 <br />2 <br />50 <br />64 <br />N/A <br />N/A <br />N/A <br />64 <br />Severe Impact <br />R8 <br />3 <br />52 <br />53 <br />65 <br />50 <br />N/A <br />65 <br />Moderate Impact <br />4 <br />R9 <br />3 <br />52 <br />50 <br />63 <br />54 <br />N/A <br />64 <br />Moderate Impact <br />5 <br />R11 <br />3 <br />46 <br />52 <br />60 <br />43 <br />N/A <br />60 <br />Moderate Impact <br />6 <br />R10 <br />2 <br />53 <br />57 <br />68 <br />51 <br />N/A <br />69 <br />Severe Impact <br />7 <br />R12 <br />2 <br />50 <br />58 <br />72 <br />49 <br />N/A <br />72 <br />Severe Impact <br />8 <br />R13 <br />2 <br />55 <br />57 <br />68 <br />44 <br />N/A <br />68 <br />Severe Impact <br />9 <br />R15 <br />2 <br />67 <br />N/A <br />N/A <br />N/A <br />66 <br />66 <br />Moderate Impact <br />10 <br />R14 <br />2 <br />58 <br />56 <br />N/A <br />N/A <br />63 <br />64 <br />Severe Impact <br />Source: URS (February 2012) and HDR (February 2017). <br />vi <br />