Status of Re-Sampling Effort:
The re-sampling effort to sample water supply wells that previously tested non-detect or less than 20 parts per trillion for PFOA is wrapping up this week. As with the initial sampling protocol, results from re-tests will be mailed to the respective owners and tenants. Expect to receive results two to three weeks after your well was re-sampled.
If you have any questions about this re-sampling effort, please contact DEC staff Richard Spiese or John Schmeltzer at (802) 828-1138.
Geophysical well logging is underway by Vermont Geological Survey (DEC) and SUNY Plattsburgh partner: Ever wonder what is really going on when scientists approach a water supply well with fancy gear? Here's the scoop.
Geophysical tools that are attached to a cable and electric winch are lowered down into the well one at a time to measure: 1) water temperature and conductivity, 2) the natural radioactivity of rock formations, and 3) well diameter. The whole setup is run by a laptop, and helps the field scientists to understand what kind of rock is under the ground, and where the fractures are in the rock.
A fourth tool called an Accoustic Televiewer constructs a 3-dimensional radar image of the whole well that shows the beds and fractures intersecting the well. The geophysical logging takes 3-5 hours per well and depends on the depth.