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Depth-related chemical changes in acid streamer growths found within the abandoned Cae Coch pyrite mine.
| Streamer depth (cm) | pH | DO2 (% of ambient) | Eh (mV) | Fe2+ (g L−1) | Fe3+ (g L−1) | SO42− (g L−1) |
|---|---|---|---|---|---|---|
| 0–10 | 2.35 | 82 | +734 | 0.25 | 1.15 | 5.9 |
| 10–20 | 2.40 | 10 | +634 | 1.21 | 0.39 | 6.0 |
| 20–30 | 2.45 | <0.1 | +484 | 2.16 | <0.01 | 5.2 |
