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City'funded Monitoring Shows Occasional Hexavalent Chromium Exceedances but Not Sustained
Summary
Trinity Services updated the council on the city's hexavalent chromium monitoring program: sampling at several sites has recorded single-sample exceedances (1.2 ng and 1.64 ng) but not the consecutive three-sample threshold set by South Coast AQMD that would classify an exceedance of concern.
Trinity Services briefed the Paramount City Council on ongoing air monitoring for hexavalent chromium, describing the network of samplers at City Hall, two elementary schools and several pole-mounted locations and reporting occasional single-sample exceedances but no three-consecutive-sample exceedance during the monitoring period.
"Starting from the first sample on June 11, we had an invalid sample..."…
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