Sites
| Site Identifier | Name | Location | Samples |
|---|---|---|---|
| 23SC50 | Hilltop | St. Charles County | 3 |
| 23SC501 | Richterkessing | St. Charles County | 2 |
| 23SC556 | O'Fallon | St. Charles County | 2 |
| 23SC572 | Little Hills Expressway | St. Charles County | 4 |
| 23SC609 | Boschert | St. Charles County | 24 |
| 23SC7 | Dreckshage | St. Charles County | 1 |
| 23SC834 | Hoing | St. Charles County | 5 |
| 23SC924 | Truman Road | St. Charles County | 7 |