Sources of PCBs in the Ramford River
| History | Surface Sediment Samples | Water Samples | Species Samples | Sampling Protocol |
TABLE 2. Concentration of PCBs in the water column in ng/L (or parts per trillion). Each value is an average of three analyses, the ranges reported for each date represent values for 20 water samples taken in a transect across the river. See field sampling and analytical chemistry program sections for details.
| Station | 7/93 | 12/93 | 7/94 | 12/94 | 7/95 | 12/95 |
|
2 |
0.2-0.3 |
0.2-0.3 |
0.1-0.2 |
0.1-0.2 |
O.2-0.2 |
0.1-0.2 |
|
6 |
45-290 |
43-200 |
53-300 |
20-160 |
20-240 |
25-230 |
|
19 |
0.8-3.0 |
0.4-3.0 |
0.8-5.0 |
0.8-5.4 |
1.3-6.3 |
0.8-4.7 |