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CADDIS Volume 3: Examples & Applications
Worksheets: Little Scioto River, OH
Assemble Data from Elsewhere
Table 18. Threshold Effects Levels and Probable Effects Levels available for PAHs and metals measured in sediments from the Little Scioto River. Values are in mg/kg, normalized to sediment dry weight. Source: U.S. EPA (1996).
| Chemical |
Threshold Effects Level |
Probable Effects Level |
| Benzo(a)pyrene |
0.03 |
0.32 |
| Fluoranthene |
0.04 |
0.32 |
| Benzo[a]anthracene |
0.03 |
0.28 |
| Chrysene |
0.02 |
0.41 |
| Benzo(g,h,i)perylene |
0.01 |
0.25 |
| Chromium |
32.3 |
119.4 |
| Copper |
28 |
101.2 |
| Lead |
37.2 |
81.7 |
| Zinc |
98.1 |
544 |
Table 19. Available criteria values.
| Chemical |
Criterion (units) |
Source |
| Ammonia |
1.27 mg/L at pH 8.0 0.57 mg/L at pH 8.5 |
U.S. EPA 1998 |
| Dissolved Oxygen |
3.0 mg/L for Modified Warmwater Habitat |
Ohio EPA 1996 |
| Nitrate-nitrite |
1.6 (mg/L) |
Ohio EPA 1999 |
| Total phosphorus |
0.28 (mg/L) |
Ohio EPA 1999 |
| Copper |
21 (μg/l) |
U.S. EPA 1987 (hardness of 200 mg/l) |
| Lead |
7.7 (μg/l) |
U.S. EPA 1987 (hardness of 200 mg/l) |
| Zinc |
190 (μg/l) |
U.S. EPA 1987 (hardness of 200 mg/l) |
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