Tetra Tech proposed a study involving concurrent ambient noise monitoring at multiple locations within or near the proposed mining operations area and a preliminary evaluation of noise attenuation between the proposed mining operation and the residences. This report presents the results of that study.
Tetra Tech. 2008. Background Ambient Noise Study. Project No. 114-320776 (100-SFO-T22436). Prepared for Rosemont Copper Company. Tucson, Arizona: Tetra Tech. October.