Resource

Settled dust samples were collected from a former manufacturing facility prior to filming activities in the builidng.  The following compares results to national average background levels and ranges as compiled the U.S. Geological Survey (USGS).  It is also applicable to standard soil samples. 

AVG_Element_Concentrations_in_Soils.jpg

Settled dust samples were collected from a former manufacturing facility prior to filming activities in the builidng.  The following compares results to Cal. EPA Region 9 Screening Levels AND the EPA's newer combined "Regional Screening Levels." 

Regional_Screening_Levels___Soil.jpg