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INDUSTRIAL HYGIENE NOISE/DUST SAMPLING <br /> MW DEC (Decatur, Illinois - 404) <br /> 9/17j87 <br /> SUPPLEMENTAL DATA <br /> A. General. <br /> 1. Pre-Plant Operation Environmental Tests - at gate <br /> entrance to plant. <br /> 1. 0526 hrs - crickets-breeze - steady 46dba. <br /> 2. 0527 hrs - plus breeze gusts - rustling tree <br /> leaves - ranging 4� thru 52�dba. <br /> 3. 0528 hrs - breeze gust, leaves - 49dba. <br /> 4. 0529 hrs - no gust, no leaves - 45-47dba - steadier @ 46dba <br /> 5. 0531 hrs - no gust. no leaves - 46�-47dba <br /> 6. 0532 hrs - breeze �_:�ust, leaves - 48dba <br /> 2. Operational Environmen�al Tests - along perimeter of <br /> plant (conveyor discha�ge) <br /> 7. SE plant perimeter - 74-75dba @ 0736 hrs. <br /> 8. South plant perime�er - 74-75dba @ 0739 hrs. <br /> 9. West end plant per�meter - 73-76dba @ 0741 hrs. � <br /> 10. North end plant pe:_imeter - 71-72dba @ 0742 hrs. <br /> 3. Operational Environmen��al Tests - on roadway between shaker <br /> screens and wash plant. <br /> 11. 88dba steady @ 0738 hrs. <br /> Note: All SLM tests on A slow. <br />