pf_02574 - Laserfiche WebLink

Home

Michael Falk 1 February 1994 Page 2 Monitoring was performed with a Larson-Davis 700 Sound Level Analyzer and calibrated prior to each period. The temperature ranged from 10 to 20 degrees Fahrenheit during the monitoring period and winds were generally less than 10 mph, sometimes from the northwest, sometimes from the southeast. The weather did not seem to affect the monitoring results. .%BIBI~ 1 shows 5-minute L50 readings from just after 9 pm on Saturday 22 3anuary to 8 am on Sunday 23 January. The L50 remained below the 50 dBA nighttime standards throughout the entire nighttime period (10 pm - 7 am). .%BIBI~ 2 shows 10-minute readings (which permited a longer monitoring period) beginning at 6 pm on Sunday 23 January to just after 8 am on Monday 24 January. Except for several isolated periods, the L50 remained below the 50 dBA standard during the nighttime period. The sharp spike at about 9:30 pm is clearly due to a local source near the microphone. .%BIBI~ 3 shows 10-minute readings from just after 9 pm on Monday 24 January to just after 9 am on Tuesday 25 January. Again, the levels remained below the 50 dBA nighttime standard. .%BIBI~ 4 shows hourlv L50 readings for the three January days in 1994 and the June day in 1993. It can be seen that the 1994 readings are generally similar, although the Saturday night readings are slightly higher. All of the 1994 readings are well below those observed in 1993. Thus it appears that the noise control measures undertaken by Advance Circuits have proven effective in meeting the state noise standards. It should be noted, however, that any sudden, variable, or impact noises can still be a problem if not controlled, even though they may fall below the state standard. The continuing control of trash pickup, deliveries, and keeping doors closed as recommended previously should go a long way to minimizing these types of noises. Please let me know if you have any questions concerning these noise measure- ments or our conclusions. I would like to express my appreciation to you, to the Andersons and others of the neighborhood group and to Advance Circuits for the help and cooperation provided during this project. Sincerely, 'b:)~ , ~ David Braslau President ~ ~ cc: Dan McCarthy Joan Anderson lvl1994.rep 93014