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gravel production is 250,000 tons per year, to extend <br /> over a 17 to 25 year mine life. Sources of air pollution <br /> will include dust (total suspended particulate--TSP) <br /> t <br /> from gravel mining,- material handling and processing, and <br /> gravel transportation, and small amounts of vehicle pol- <br /> lutants from haul trucks and other gravel-mining equipment. <br /> This report analyzes and discusses air quality impacts of <br /> the project. Existing air quality and meteorological con- <br /> ditions at the site are described. Quantitative estimates <br /> are derived for the quantity of pollutants to be generated <br /> and resulting dust concentrations in the ambient air. <br /> • These results are interpreted in terms of expected effects <br /> and discussed in relation to site-specific factors, sur- <br /> rounding development, and applicable air pollution stand- <br /> ards and regulations. <br /> Existing Air Quality <br /> Existing air quality at the site is generally good and <br /> represents typical background levels of pollutants for a <br /> rural area in close proximity to urban developments . Dust <br /> and suspended particulate concentrations in air at the <br /> • site are occasionally high due to wind-raised dust from <br /> nearby roads, agricultural activity, construction activity, <br /> / or natural dust sources. Other pollutants can sometimes <br /> l• G-2 <br />