C.2.7 Quality Control Review

  • Field QC protocols were violated because samples were not cooled for shipping.
  • Subsampling inconsistency occurred because one subsample was collected wet and the other five subsamples were collected dry.
  • Laboratory samples were prepared and analyzed for DRO according to Method AK102. The Laboratory Data Review Checklist was completed for the lab data. All data requirements were met except the 14-day hold time; sample temperatures were thus exceeded due to subsampling challenges and shipping problems.8

8 Samples were temporarily misplaced in Seattle, returned to Juneau, and then repackaged and sent to the analytical lab in Colorado.