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TABLE 3.7 <br /> AIR QUALITY NONATTAINMENT AREAS <br /> STATE OF NORTH CAROLINA <br /> NONATTAINMENT FOR CARBON MONOXIDE (00) <br /> Durham County <br /> Forsyth County <br /> Wake County <br /> NONATTAINMENT FOR OZONE (03) <br /> Davidson County <br /> Davie County (Portion) <br /> Durham County <br /> Dutchville Township <br /> Forsyth County <br /> Gaston County <br /> Guilford County <br /> Mecklenburg County <br /> Air emissions at the quarry site are predominately particulate matter originating from quarry <br /> vehicle movement and crusher operations. These emissions are controlled by "watering down" <br /> the haul roads and by spraying water on the crusher and screening mechanisms. This water is <br /> pumped from the settling/holding basins located on the quarry site. Water in these basins is <br /> obtained by pumping rainwater runoff out of the quarry pit. Water from the stone washing <br /> operation is returned to the pond where the suspended particles settle. The water is then <br /> recycled through the system and is not discharged. <br /> Similar activities are used at the asphalt plant to control particulate emissions. <br /> 3.5.5 Hazardous Materials <br /> Operations at the quarry and asphalt plant include the use of some materials that may be <br /> considered hazardous. <br /> 3-20 <br />