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Loading 2015-03-01 - 2015-04-01
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Processed SO2 data normally.  These data are taken with a ~10-s time constant on the instrument. 

Ambient data appear reliable.  There is a time lag after the standard additions where a slight signal shows up as the calibration line flushes out.  

This month showed another ~10% increase in S.A. response.  Probably due to flow changes in the manifold.  However, this could also be a lamp voltage issue.