Today we shared with the WDNR and property owners the data from surface water samples taken along Ditch B on February 11 and February 17, 2021 to help inform the location and design of the Groundwater Extraction & Treatment System (GETS) for PFAS in groundwater and surface water.
The data below includes the regular testing of water quality and PFAS levels approximately 10 feet upstream (SW-L06) and downstream (SW-39) from the interim treatment system in Ditch B and will be collected and posted on a regular basis for as long as conditions allow.
| Location |
SW-L06 (upstream) |
SW-039 (downstream) |
| Compound (ng/L) |
PFOA |
PFOS |
PFOA |
PFOS |
| Criteria (ng/L) |
420 |
11 |
420 |
11 |
| 10/7/20 |
1400 D |
300 |
36 |
2.2 |
| 10/21/20 |
630 D |
100 |
130 [130] |
16 |
| 11/4/20 |
2000 D |
150 |
370 D |
16 |
| 11/20/20 |
2,100 D |
160 |
830 D [740 D] |
51 [53] |
| 12/14/20 |
2,600 |
160 |
710 D |
41 |
| 12/28/20 |
2400 |
170 |
670 D [710 D] |
33 [42] |
| 1/22/21 |
2400 |
160 |
6.8 |
0.57 |
| 1/27/21 |
2100 |
180 |
Not detected |
Not detected |
| 2/2/2021 |
1500 |
140 |
220 |
21 |
| 2/11/2021 |
2,000 |
210 |
0.8 |
Not detected |
| 2/17/2021 |
1,200 |
160 |
8.8 |
4.9 |
Notes:
WDNR Permit Criteria for Ditch B = PFOA: 420 ng/L; PFOS: 11 ng/L
Detections above applicable criteria are Bold
Duplicate analyses in brackets [ ]
ng/L = nanograms per liter
D = dilution required for sample analysis
PFOA = perfluorooctanoic acid
If you have any questions, please call our dedicated phone line:
(715) 582-7100
