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Start Over You searched for: Year 2011 Remove constraint Year: 2011 Resource Type Polygon data Remove constraint Resource Type: Polygon data Subject Environmental monitoring Remove constraint Subject: Environmental monitoring

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2011. Stephen P. Teale Data Center (Calif.). and California. Air Resources Board. Planning and Technical Support Division. This polygon shapefile shows area designations in California as required under Health and Safety Code section 39608 for ozone, nitrogen dioxide, su... California. Air Resources Board.