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Noise monitoring was conducted using a Quest Model 2800, Type 2, Integrating Sound Level Meter, SN HS2100037, calibrated with a Quest Model QC-I0 Sound Calibrator, SN QE3090042 (Appendix D). Temperature, Humidity and wind velocity measurements were made with a TSI Model 8360 thermo anemometer (Appendix D). Sound Pressure Level Mapping of the dust collector was done by laying out a radial grid on the parking lot surface to the east (rear) of the facility, using the anchor bolt of the North East support leg of the dust collector as a reference point. A 180 degree radial pattern was laid out, with measurements taken at the reference point, then at 25 feet, 50 feet and 100 feet from the reference point on the North, Northeast, East, Southeast and South radials. An additional measurement was obtained at the street level, 168 feet north of the reference point on the North radial. Measurements were obtained by placing the Quest meter on a Slik Model 101 Tripod, and elevating the microphone level to 36 inches above the ground surface. The microphone was oriented 70 degrees horizontally from the dust collector, and 70 degrees above the horizon. The meter as calibrated with the Quest calibrator, and the protective wind screen placed over the microphone. The meter was centered over each grid point and the meter placed in the run mode for 5 minutes to obtain an average noise level for each recording point. The noise levels were recorded on a field work sheet. Following the data collection, the meter was re-calibrated. The dust collector was then started, and the grid measurements repeated and recorded using the previously described method (Appendix E & F). . Community noise monitoring was conducted by placing the Quest meter on the Slik tripod and raising the microphone to 36 inches above the ground, in front of 1785 Centennial Drive West, on the surface of the city street. The microphone was oriented to the Southwest, and 70 degrees above the horizon. The meter was then calibrated with the Quest calibrator. The protective wind screen was then fitted over the microphone, and the meter placed in the RUN mode for 60 minutes. Wind speed and direction measurements were made using the TSI thermoanemometer and the data recorded. Air pressure data was obtained from the Minneapolis International Airport. Following the 60 minute monitoring period, the meter was taken out of the RUN mode, and the data read. Data reading was conducted by connecting the meter to a CompuAdd model 325TX laptop computer, selecting the PRINT mode on the Quest meter and retrieving and recording the data. Following the data dump, the meter was calibration checked. Artistic Finishes Inc. 1726 Terrace Drive, Roseville, MD. Dust Collector Noise Monitoring 2 Integrated Loss Control, Inc. · (612) 783.9581