| Sampling | Feed type | No. | Concentration (ppm) | |||
|---|---|---|---|---|---|---|
| H2S | MM | DMS | DMDS | |||
| 1st sample (initial) | A | 1 | 3.65 | nd | nd | nd |
| 2 | 3.71 | nd | nd | nd | ||
| 3 | 3.72 | nd | nd | nd | ||
| 4 | 3.68 | nd | nd | nd | ||
| 5 | 3.71 | nd | nd | nd | ||
| B | 6 | 3.36 | nd | nd | bdl | |
| 7 | 3.26 | nd | nd | bdl | ||
| 8 | 3.44 | nd | nd | nd | ||
| 9 | 3.49 | nd | nd | nd | ||
| 10 | 3.37 | nd | nd | nd | ||
| C | 11 | 3.64 | nd | nd | nd | |
| 12 | 3.4 | nd | bdl | nd | ||
| 13 | 3.43 | nd | bdl | nd | ||
| 14 | 3.43 | nd | nd | nd | ||
| 15 | 3.62 | nd | nd | nd | ||
| 2nd sample (two weeks later) | A | 1 | nd | nd | nd | 1.29 |
| 2 | nd | bdl | 0.18 | bdl | ||
| 3 | nd | 0.22 | 0.7 | bdl | ||
| 4 | nd | nd | nd | nd | ||
| 5 | nd | nd | nd | nd | ||
| B | 6 | nd | nd | nd | bdl | |
| 7 | nd | nd | nd | bdl | ||
| 8 | nd | nd | nd | nd | ||
| 9 | nd | nd | nd | nd | ||
| 10 | nd | nd | nd | nd | ||
| C | 11 | nd | nd | nd | nd | |
| 12 | nd | nd | nd | nd | ||
| 13 | nd | nd | bdl | bdl | ||
| 14 | 0.27 | nd | nd | bdl | ||
| 15 | nd | nd | nd | bdl | ||
| 3rd sample (four weeks later) | A, B, C | 1–15 | nd | nd | nd | nd |