Is sampling by bailing a thing of the past? I've been reading websites that really discourage the use of bailing and promote the use of low-flow sampling methods. Some even recommend sampling using passive diffusion (no purge).
We sample for all types of analytes (GRO, DRO, VOCs, Metals...
I have been charged with reviewing our company SOP for groundwater sampling of monitoring wells.
Our current SOPs provide guidelines for groundwater sampling by bailing and low flow. The low flow SOP follows EPA guidance, so there isn't much to modify. However, the SOP for bailing discusses...
We recently had some asphalt installed and tested the density by ASTM D2922 (Nuclear Method). The sampling occurred while it was raining and the asphalt surface was wet. I was wondering if the surface water had any impact on the density results. Our results did not meet our spec.
