YORK recently updated its PFAS sampling instructions for Drinking and Non-Potable Water. This is available for download on the website.
With respect to Drinking Water: The methods require us to use the entire sample submitted. If we receive a full 250 mL HDPE plastic container it contains 285-290 ML. This adds an hour of time during preparation due to the volume. We can meet the detection limits necessary for potable water easily with 50% volume and save labor time and preparation instrument wear and tear.
Beginning in January, we have sent clients 2 x 250 mL PP or HDPE bottles for each sample and have instructed them fill only halfway, to give us 100-150 mL. Due to the volume change, they need to be preserved with half the amount of Trizma that we were using.
For Non-Potable Water (groundwater, etc.): YORK has changed the container to achieve more efficiency during preparation. We are requesting that field personnel fill 2 x 125 mL PP containers to the neck. The new NYSDEC October 2020 PFAS guidance does not allow us to sub-sample, therefore we must use the entire sample as submitted. If there is a very high level, then one can sub-sample can qualify as such.
For Soils: samples will remain the same: 1 x 250 mL HPDE or PP container filled ½ way with soil.