Tyco today provided the Wisconsin Department of Natural Resources (WDNR) and property owners with the test results of surface water samples recently taken from privately owned ponds. These tests are part of a workplan submitted to WDNR for additional pond and fish testing, which was requested after the submission of results from three privately owned ponds near the Fire Technology Center (FTC) on November 5, 2020.
Consistent with previous results and our groundwater model, the pond closest to the FTC has the highest concentration of PFAS compounds in its surface water.
| Test Date | Winter 2020 | |
| Pond | PFOA (ng/L) |
PFOS (ng/L) |
| A (SW-14) |
170 | 10 |
| B (SW-37) |
7.0 [6.0] |
4.0 JN (3.0 JN] |
| C (SW-38) |
36 | ND |
| D (SW-41) |
23 | 7 |
| E (SW-42) |
7.7 | 10 |
Notes:
Duplicate analyses in brackets [ ]
ng/L = nanograms per liter
JN = Presumptive compound identification; estimated value
PFOA = perfluorooctanoic acid
PFOS = Perfluorooctanesulfonic acid
