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' Pikeview Quatry Environmental Assessment Page 33 <br />Table 3.4 -Pikeview Quarry Noise Level Test Results July 12,2000 <br /> <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br />Location Source Comments dB Level <br />Maintenance shop Plant /Loaders The shop is about 300' from the plant, 58.1-75.1 <br /> sound levels were 58-62 until a loader <br /> powered into the stockpile <br />Plant area Vibrating screen Distance about 25' 85-91.2 <br />North and West of Plant /Loaders / About 500' from crusher, wind gust: 61-64 <br />plant on road to Trucks 71dBA, small airplane::71-74dBA <br />explosive storage <br />Pit area under layback Plant /Loaders / About 500' from plant behind road 54-56 <br /> Trucks berm <br />Haul road Haul truck About 25' from haul truck 84 <br /> descending, loaded <br />South end - Two drills were About 75' from nearest equipment, 80.2-84 <br />production azea drilling and a 150' from furthermost drill, bulldozer <br /> bulldozer was operating between. <br /> pushing rock <br />South end - Loader loading a About 25' from equipment. Sound 72-81 <br />production area haul truck more intense when loader pushes into <br /> pile and then drops material into the <br /> bed of the haul truck. <br />South end -topsoil About 100' from Almost no sound from the plant 43-47 <br />storage area production area, with reached this area partially due [o the <br /> slight hill between. slight wind out of the southeast. <br />Allegheny Loop, Eas[ Passing truck traffic No detectable sound from the plant at 31-45 <br />property line this point, trucks on Castle Concrete's <br /> road produced a 14dB increase to 45. <br />' Source: Roger Pittman, Safety Coordinator at Pikeview Quarry <br /> Although noise levels can be higher than 80dBA (equivalent to a high urban ambient <br />' sound13) in most instances the noise levels at Pikeview Quarry are between 40dBA (lower <br /> limit of urban sound) and 70dBA (noise caused by a passenger car at 65mph, measured 25 <br /> feet away, also referred to as reference loudness) <br />' <br /> 3.2.7 Traffic <br /> Traffic has important impacts such as air pollution, noise, congestion, public safety, <br /> and cost of road repair and maintenance. Air pollution and noise are described above. <br /> <br />' 13 <br /> This and following characterizations of sound levels were compiled by Ogden Environmental (1992) and can be found <br /> at http://www.nps.gov/planning/samo/cala/tb16-29.htm <br />' <br /> Hydrosphere Resource Consultants, 1002 Walnut Street Suite 200, Boulder, CO 80302 <br />1 <br />