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United States. Bureau of Transportation Statistics
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Public
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Subject
Air quality—Standards
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Health
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Subject
Lead
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Stanford
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Year
2008
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1. Nonattainment Areas for Lead Pollution: United States and Territories, 2008
2008. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the lead (Pb) 3... United States. Bureau of Transportation Statistics.