The January 2013 dioxane sampling data includes the results of 8 split samples in which the same samples were analyzed both by the DEQ and by Pall.
The Pall results were consistently lower, about 3/4 of those of the DEQ.
The new Pall database apparently dropped the "lab" field from all prior databases that showed which lab analyzed each sample. We had to get that information from another source to correctly compare these split samples.