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~~ <br />1.0 INTRODUCTION <br />r', <br />I; From March 23rd to March 28th, and on April 21st and 22nd, 1980 a <br />field noise survey was conducted for Colorado Westmoreland, Inc., at the <br />Orchard Valley Mine in Paonia, Colorado. This report was prepared for <br />E, Westmoreland pursuant to their lease agreement with the Bureau of Land <br />Management (BLM). <br />C <br />2.0 SURVEY ENVIRONMENT <br />Paonia, Colorado is situated in a valley at an altitude of approxi- <br />~'; mately 5,700 feet. Subject to mountain valley meteorological conditions, <br />L:: <br />sampled data will reflect variations in climatic conditions such as snow <br />cover and wind direction and speed. <br />Agricultural activities also influence noise measurements, particu- <br />IrI" <br />L. • larly during the fall when orchard harvesting is at its peak. <br />3.0 STUDY PROGRAM <br />F'~' <br />h'. <br />I ' <br />3.1 Instrumentation <br />A Metrosonics db-602 Sound Level Analyzer was used to obtain and <br />.; process community noise data. The instrument was powered by 110 V.A.C. at <br />V site M-4, March 26-28. It was powered by an internal 12 V.D.C. battery <br />while at remote location, M-2. The instrument is calibrated before being <br />set into operational mode. When measurements were taken at site M-2 an <br />F" <br />anemometer controlled data inhibit device set at 10 mph was used. <br />A model 2209 Briiel and Kjaer (B&K) Precision Sound Level Meter with a <br />Model 1613 Octave Filter Set and an Ivie IE-30A Sound Level Meter and Real <br />L• <br />