Table W1-3. Measurements Relevant to each Candidate Cause
| Candidate cause |
Relevant measurements |
| 1. Increased fine sediments |
Channel score, embeddedness subscore, siltation subscore. |
| 2. Altered pools and riffles |
Channel score, pool score, riffle score. |
| 3. Low dissolved oxygen |
Dissolved oxygen, biological oxygen demand of water, riffle score, channel score |
| 4. Increased algal biomass |
Nitrate and nitrite concentrations in water, total phosphorus concentrations in water |
| 5. Ammonia Toxicity |
Ammonia concentrations in water |
| 6. Metal Toxicity |
Metal concentrations in sediments, water and fish tissue |
| 7. PAH Toxicity |
PAH concentrations in sediments, bile metabolites in fish |
Table W1-4. Summary of Sampling Locations for 1992 Data collected in the Little Scioto River
| Sample medium |
Parameter |
Site designation and sample location (RM upstream from confluence with Scioto River) |
Number of samples per location |
| Upstream Site |
Site A |
Site B |
Downstream Sites |
| Fish |
IBI and Miwb metrics |
9.2 |
7.9 |
6.5 |
5.7 |
4.4 |
2.7 |
0.3 |
2-3 |
| Macroinvertebrates |
ICI Metrics |
9.2 |
7.9 |
6.5 |
5.7 |
4.4 |
2.1 |
0.4 |
1 |
| Sediment |
Volatile chemicals, semivolatile chemicals, metals and cyanide, PCBs and pesticides |
9.5 |
7.9 |
6.5 |
5.8 |
4.4 |
2.7 |
0.4 |
1-3 |
| Water |
Metals, phenolic compounds, ammonia, nitrates and nitrites (NO x), total phosphorus (P), and BOD |
9.2 |
7.9 |
6.5 |
5.8 |
4.4 |
2.7 |
0.4 |
1 |
| Water |
Dissolved oxygen |
9.2 |
7.9 |
|
5.8 |
4.4 |
2.7 |
0.4 |
measured continuously
over 3 days |
| Physical Habitat |
QHEI metrics |
9.2 |
7.9 |
6.5 |
5.7 |
4.4 |
2.7 |
0.3 |
1 |
| Fish Tissue |
Pesticides, PCBs, metals, semivolatile compounds, and % lipid |
9.2 |
|
6.5 |
|
|
2.7 |
|
2-5 composite samples |
| White Sucker Bile |
PAH metabolites |
|
7.9 |
6.5 |
5.7 |
4.4 |
2.7 |
0.3 |
5-7 |
Table W1-5. Concentrations of chemicals in water. Units are in mg/L except where noted.
| Chemical |
Up-stream Site |
Site A |
Site B |
Downstream sites (RM) |
| 5.8 |
4.4 |
2.7 |
0.4 |
| BOD |
1 |
1 |
2.3 |
4.7 |
4.2 |
3.5 |
2.2 |
| Nitrate and Nitrite |
1.22 |
1.44 |
0.81 |
8.1 |
6.6 |
4.5 |
4.47 |
| Ammonia |
ND |
ND |
0.12 |
1.16 |
1.44 |
2.1 |
0.58 |
| Total phosphorus |
0.06 |
0.07 |
0.09 |
2.17 |
1.96 |
1.8 |
1.34 |
Dissolved oxygen (minimum) |
8.8 NA |
5.7 2.8 |
NA 1.9 |
4.2 4.2 |
4.3 3.2 |
3.0 2.0 |
4.4 2.5 |
| Coppera |
ND |
ND |
15 |
ND |
ND |
ND |
ND |
| Leada |
ND |
ND |
3 |
3 |
ND |
ND |
ND |
| Zinca |
ND |
ND |
ND |
18 |
12 |
13 |
ND |
a. Units are µg/L.
ND. Not Detected
Table W1-6. Selected physical habitat quality scores
| Parameter |
Up-stream Site |
Site A |
Site B |
Downstream sites (RM) |
| 5.7 |
4.4 |
2.7 |
0.4 |
| Substrate embeddedness a |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
| Silt b |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
| Channel c |
17 |
10 |
10 |
10 |
10 |
10 |
7 |
| Pool d |
11 |
8 |
8 |
8 |
6 |
8 |
8 |
| Riffle e |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
a. Levels of embeddedness were scored from most to least (1=extreme, 2=moderate, 3=low, 4=none)
b. Levels of silt were scored from most to least (1=heavy, 2=moderate, 3=normal, 4=free)
c. Channels were scored from high to low quality (20=high quality)
d. Pools were scored from high to low quality (12=high quality)
e. Riffles were scored from high to low quality (8=high quality)
Figure W1-6. Bile metabolites (μg/mg protein) measured in white suckers from the Little Scioto River. The grey horizontal line shows the upper limits of concentrations considered background for the state of Ohio. The number of fish sampled is shown above each bar. Vertical lines are standard errors. BAP = benzo[a]pyrene; NAPH= naphthalene. Source: Lin et al. (1996) and Cormier et al. (2000).
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