Table 4.
Total mercury levels on suspended particles filtered from Lake Chapala in March 2007.
| Site ID | Filter ID | Volume Filtered (ml) | Particle mass (g) | Total Mercury* (ng/g) |
|---|---|---|---|---|
| Santiago | DX 1 | 780 | 0.0272 | 480 |
| Santiago | DX 2 | 460 | 0.0164 | 420 |
| Lerma | DX 5 | NR# | 0.1174 | 670 |
| Lerma | DX 6 | 250 | 0.0568 | 600 |
| Alacranes | DY 5 | 530 | 0.0138 | 290 |
| Alacranes | DY 6 | 225 | 0.0057 | 400 |
| Presidio | DY 7 | 420 | 0.0101 | 770 |
| Presidio | DY 8 | 610 | 0.0138 | 690 |
| Petatan | DY 11 | 695 | 0.0434 | 580 |
| Petatan | DY 12 | 340 | 0.0272 | 580 |
* Each filter was cut into two pieces that were analyzed separately for total mercury content. The value reported is the mean of the two measurements. In all cases except one, the relative deviation from the mean was <10%. For filter DY 7 (Presidio) it was 15%.
# NR = Not Recorded.