TM01-04 Results for Filtered and Whole-Water Recoverable Aluminum and Zinc by ICP-MS Affected by Contamination from May 2000 through September 2000

The National Water Quality Laboratory (NWQL) identified a source of contamination affecting most low-level results for filtered and whole-water recoverable aluminum and zinc determined by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) from May 2000 through September 2000. All potentially affected samples that were available at the time were reanalyzed and the results updated, if necessary. For those samples that were no longer available for reanalysis, the result qualifier was reset to the "lessthan" data qualifier with the original concentration unchanged. These changes were sent to the district databases on May 2, 2001.