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Noise survey <br />Investigator Date <br />SLM Manufacturer and Model Serial Number <br />Calibrator Manufacturer and Model <br />Calibrator Serial Number Calibrator Frequency (Hz) <br />Initial Calibration (dBA) Final Calibration (dBA) <br />Meteorological Conditions: Wind Speed Direction Temperature <br />Source <br />Monitor Location <br />Time Start <br />Results L10 <br />Time End <br />dBA <br />L50 dBA <br />Diagram (Indicate noise source, receiver, microphone location, reflecting objects, obstructions, landmarks, <br />and distances) <br />A Guide to Noise Control in <br />Minnesota • October 2008 Minnesota Pollution Control Agency <br />12 <br />