Agenda - Council - 06/13/2017 - Laserfiche WebLink

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III. Noise Monitoring SBP conducted monitoring on May 5, 2017 at locations representing the first and second rows of homes nearest the highway and railroad. Two of the locations (M1 and M2) are representative of the residential locations in the first row of housing away nearest the railroad and highway, and one location (M3) is representative of the second row of housing. The monitoring locations are shown in Figure 1. Monitoring was conducted with two Type 1 sound analyzers, a Sinus Apollo, and CEL Model 593. Each analyzer was periodically field calibrated during the testing. Monitoring was conducted consistent with MPCA procedures. Monitoring was conducted for periods of 30 minutes to one hour in length. The following table presents the results of the noise monitoring. Table 1 Noise Monitoring Results — May 5, 2017 Riverstone Addition, Ramsey, MN Location Distance North Time Lio (dBA) L50 (dBA) Notes of Railroad Track M1 165 feet 1126-1156 60.2 54.0 1 NB Train M2 165 feet 1128-1158 60.5 54.5 1 NB Train 1 M1 165 feet 1221-1251 58.9 53.3 No Train 1 M1 165 feet 1251-1321 60.5 54.7 No Train M1 165 feet 1332-1432 64.4 58.3 2 SB trains, 1 NB at the End 1 M3 400 feet 1209-1239 56.0 51.5 No Train M3 400 feet 1322-1357 60.0 55.0 1 SB Train 1 M3 400 feet 1407-1447 61.5 57.5 2 NB Trains 1 In addition to this summary data, SBP also collected detailed time history data during selected monitoring periods. This data has been used to determine the impact of train noise relative to the State Standards. Complete monitoring data sets are available upon request. The data shows the site noise levels to be well below the State daytime standards for the earlier monitoring periods, and within, but very near the Standards for the later period at location M1. This is likely due to increasing traffic volumes in the later afternoon.