TABLE 1.
Metal concentrations in western Stege Marsh
| Sample location | Depth (cm) | Total concn (ppm or ppb)a |
pH | |||||
|---|---|---|---|---|---|---|---|---|
| As | Cd | Cu | Pb | Hg | Zn | |||
| AMD pond (predredge) | 0 | 1,020 | 2 | 193 | 37 | 1 | 517 | 3.1 |
| 20 | 746 | 3 | 745 | 289 | 28 | 945 | 4.8 | |
| 40 | 1,330 | 44 | 1,640 | 1,240 | 166 | 5,000 | 6.1 | |
| Upper tidal slough | 0 | 1,400 | 23 | 85 | 70 | 3 | 300 | 6.9 |
| 20 | 110 | 9 | 320 | 72 | 40 | 710 | 7.6 | |
| 40 | 4 | 3 | 15 | 7 | 0 | 28 | 7.8 | |
| Lower tidal slough | 0 | 23 | 7 | 93 | 80 | 1 | 260 | 7.4 |
| 20 | 190 | 10 | 500 | 140 | 22 | 1,300 | 8.2 | |
| 40 | 17 | 4 | 200 | 84 | 40 | 410 | 8.7 | |
| Main channel | 0 | 5 | 5 | 10 | 3 | 0 | 30 | 8.5 |
a
Typical upper range values, as determined by whole-sediment acid digestion and inductively coupled plasma optical emission spectroscopy (ICP-OES) or inductively coupled plasma mass spectrometry (ICP-MS) analysis (or cold-vapor atomic fluorescence spectrometry [for Hg]). Values for all sites are given as ppm, except for the “main channel” values, given in ppb.