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Start Over Year 2008 Resource Type Polygon data Creator Stephen P. Teale Data Center (Calif.).
2008, 2009, 2010, and 2011. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This polygon shapefile contains area designations of hydrogen sulfide levels in California as required under Health and Safety Code section 39608. ... California. Air Resources Board.