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Start Over You searched for: Resource Type Polygon data Remove constraint Resource Type: Polygon data Subject Particulate nitrate Remove constraint Subject: Particulate nitrate Creator California Air Resources Board. Planning and Technical Support Division Remove constraint Creator: California Air Resources Board. Planning and Technical Support Division

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2003. California Air Resources Board. Planning and Technical Support Division and Stephen P. Teale Data Center (Calif.). This polygon shapefile displays particulate matter < 10 microns (PM 10) area designations pursuant to 40CFR81.305, the federal national ambient ... California. Air Resources Board.