DQRID : D151116.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/17/2015000001/25/20161436Suspect
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Subject:
ENA/OZONE/C1 - Reprocess: Under reporting ozone concentration
DataStreams:enaaoso3C1.00, enaaoso3C1.a1
Description:
Switching valve developed an internal leak that gradually worsened. Reported instrument 
values are under-representations of the ambient ozone concentration during this period. The 
under reporting worsens from 85% to 77% over the course of this DQR. No corrections have 
been applied at this point.
Suggestions: 
A linear correction of the data from reported[ozone]/0.85 at the beginning of the 

period to reported[ozone]/0.77 at the end of the period brings the internal calibrations 
into line AND agrees with the step function of [O3] before and after the valve replacement.
Measurements:enaaoso3C1.a1:
  • ozone
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enaaoso3C1.00:
  • Raw data stream - documentation not supported
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