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HomeMy WebLinkAbout20260098 56 Duplainville Rd Regeneron Sketch Plan Table of Estimated SPL Southern BoundaryAttachment A - Estimation of Southern Property Line Sound Pressure Level Source Rating dBA at 50’ dBA at 100’ dBA at 200’ dBA at 400’ dBA at 800’ dBA at 1,600’ Distance to South Property Line dBA Δ dBA Adjustment Adjusted dBA Generator Transformer 1 Not Applicable 57 51 45 39 33 27 ±990’ 31.575 -- -- 31.575 Generator Transformer 2 Not Applicable 57 51 45 39 33 27 ±990’ 31.575 0 + 3 34.575 Fire Pump Transformer Not Applicable 57 51 45 39 33 27 ±260’ 43.20 8.63 + 1 44.2 4.16 KV Transformer 1 Not Applicable 70 64 58 52 46 40 ±1,205’ 42.9625 1.24 + 3 47.2 4.16 KV Transformer 2 Not Applicable 70 64 58 52 46 40 ±1,175’ 43.1875 4.01 + 1 48.2 34.5 KV Transformer 1 Not Applicable 70 64 58 52 46 40 ±1,300’ 42.25 5.95 + 1 49.2 34.5 KV Transformer 2 Not Applicable 70 64 58 52 46 40 ±1,300’ 42.25 6.95 + 1 50.2 Cooling Tower 1 4,000 tons 68 62 56 50 44 38 ±1,180’ 41.15 9.05 + 1 51.2 Cooling Tower 2 4,000 tons 68 62 56 50 44 38 ±1,180’ 41.15 10.05 0 51.2 Cooling Tower 3 8,000 tons 69 63 57 51 45 39 ±1,180’ 42.15 8.05 + 1 52.2 Cooling Tower 4 8,000 tons 69 63 57 51 45 39 ±1,180’ 42.15 9.05 + 1 53.2 Emergency Generator 1 4 MW 87 81 75 69 63 57 ±900’ 62.25 10.05 0 62.25 Emergency Generator 2 4 MW 87 81 75 69 63 57 ±900’ 62.25 0 + 3 65.25 Emergency Generator 3 4 MW 87 81 75 69 63 57 ±850’ 62.625 2.625 + 2 67.25 Emergency Generator 4 4 MW 87 81 75 69 63 57 ±850’ 62.625 4.625 + 1 68.25 Notes: “Δ” – refers to the difference between the previously listed Sound Pressure Level and the Sound Pressure Level of the next source “dBA Adjustment” is the factor for additive effects of multiple sound sources as presented within Table A of the reference document. “Adjusted dBA” refers to the greater of the previous and current Sound Pressure Level when adding two sources plus the adjust ment factor based on the SPL of each source