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Table 23. Estimated Exposure Doses for Chemicals in Fish Caught in EFPC Compared to Cancer Screening Guidelines
Substance Name |
Species |
2nd Tier Screening Conc. |
EPA’s Oral Cancer Slope Factor (mg/kg/day)-1 |
Estimated Exposure Dose (mg/kg/day) |
Risk |
Does the Estimated Exposure Dose Exceed the Cancer Screening Guideline (10-4)? |
|||
|---|---|---|---|---|---|---|---|---|---|
Subsistence |
Recreational |
Subsistence |
Recreational |
Subsistence |
Recreational |
||||
Inorganics |
|||||||||
Arsenic |
Crayfish |
0.51 |
1.5 |
2.0E-04 |
2.5E-05 |
3.0E-04 |
3.7E-05 |
Yes |
No |
Arsenic |
Sunfish spp. |
0.12 |
1.5 |
6.6E-05 |
8.1E-06 |
9.9E-05 |
1.2E-05 |
No |
No |
Cadmium |
Crayfish |
3.7 |
Evaluated for noncarcinogenic effects (see Table 22) |
||||||
Cadmium |
Sunfish spp. |
1.7 |
Evaluated for noncarcinogenic effects (see Table 22) |
||||||
Chromium |
Crayfish |
2.9 |
Evaluated for noncarcinogenic effects (see Table 22) |
||||||
Chromium |
Sunfish spp. |
0.64 |
Evaluated for noncarcinogenic effects (see Table 22) |
||||||
Organics |
|||||||||
Aldrin |
Sunfish spp. |
ND |
17 |
ND |
ND |
ND |
ND |
No |
No |
Aldrin |
Crayfish |
0.0012 |
17 |
4.9E-07 |
6.1E-08 |
8.4E-06 |
1.0E-06 |
No |
No |
Benzo(a)pyrene |
Sunfish spp. |
ND |
7.3 |
ND |
ND |
ND |
ND |
No |
No |
Benzo(a)pyrene |
Crayfish |
0.033 |
7.3 |
1.3E-05 |
1.6E-06 |
9.6E-05 |
1.2E-05 |
No |
No |
Dibenzo(a,h)anthracene |
Sunfish spp. |
ND |
7.3 |
ND |
ND |
ND |
ND |
No |
No |
Dibenzo(a,h)anthracene |
Crayfish |
0.037 |
7.3 |
1.5E-05 |
1.8E-06 |
1.1E-04 |
1.3E-05 |
Yes |
No |
Dieldrin |
Crayfish |
0.0052 |
16 |
2.1E-06 |
2.5E-07 |
3.3E-05 |
4.0E-06 |
No |
No |
Dieldrin |
Sunfish spp. |
0.066 |
16 |
2.6E-05 |
3.2E-06 |
4.2E-04 |
5.2E-05 |
Yes |
No |
alpha-HCH |
Sunfish spp. |
ND |
6.3 |
ND |
ND |
ND |
ND |
No |
No |
alpha-HCH |
Crayfish |
0.0053 |
6.3 |
2.1E-06 |
2.6E-07 |
1.3E-05 |
1.6E-06 |
No |
No |
Heptachlor epoxide |
Crayfish |
0.0027 |
9.1 |
1.1E-06 |
1.3E-07 |
9.7E-06 |
1.2E-06 |
No |
No |
Heptachlor epoxide |
Sunfish spp. |
0.068 |
9.1 |
2.7E-05 |
3.3E-06 |
2.5E-04 |
3.0E-05 |
Yes |
No |
Toxaphene |
Crayfish |
ND |
1.1 |
ND |
ND |
ND |
ND |
No |
No |
Toxaphene |
Sunfish spp. |
ND |
1.1 |
ND |
ND |
ND |
ND |
No |
No |
Cancer subsistence-level doses were calculated using the following formula:
dose = (second-tier screening concentration×0.065 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×70 years))
Cancer recreational-level doses were calculated using the following formula:
dose = (second-tier screening concentration×0.008 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×70 years))
The second-tier screening concentrations are rounded.
conc. = concentration
ND = not detected
EFPC = East Fork Poplar Creek
ppm = parts per million
mg/kg/day = milligram per kilogram per day
Unknown aquatic = "unknown aquatic animal"
Table 24. Estimated Exposure Doses for Chemicals in Fish Caught in the Clinch River Compared to Noncancer Screening Guidelines
Substance Name |
Species |
Minimum (ppm) |
Maximum (ppm) |
2nd Tier Screening Conc. |
Noncancer Screening Guideline (mg/kg/day) |
Source |
Subsistence Estimated Exposure Dose (mg/kg/day) |
Does the Subsistence Estimated Exposure Dose Exceed the Noncancer Screening Guideline? |
Recreational Estimated Exposure Dose (mg/kg/day) |
Does the Recreational Estimated Exposure Dose Exceed the Noncancer Screening Guideline? |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Child |
Adult |
Child |
Adult |
Child |
Adult |
Child |
Adult |
||||||||||
Inorganics |
|||||||||||||||||
Arsenic |
Catfish |
0.64 |
0.64 |
0.64 |
0.0003 |
CMRL |
9.8E-04 |
5.9E-04 |
Yes |
Yes |
1.5E-04 |
7.3E-05 |
No |
No |
|||
Arsenic |
Sunfish spp. |
0.018 |
1.1 |
0.79 |
0.0003 |
CMRL |
1.2E-03 |
7.4E-04 |
Yes |
Yes |
1.8E-04 |
9.0E-05 |
No |
No |
|||
Arsenic |
Bass spp. |
0.14 |
0.45 |
0.37 |
0.0003 |
CMRL |
5.7E-04 |
3.4E-04 |
Yes |
Yes |
8.5E-05 |
4.2E-05 |
No |
No |
|||
Cadmium |
Sunfish spp. |
ND |
ND |
ND |
0.0002 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
|||
Cadmium |
Catfish |
ND |
ND |
ND |
0.0002 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
|||
Cadmium |
Bass spp. |
ND |
ND |
ND |
0.0002 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
|||
Chromium |
Bass spp. |
ND |
ND |
ND |
0.003 |
RfD |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
|||
Chromium |
Catfish |
0.12 |
0.406 |
0.47 |
0.003 |
RfD |
7.2E-04 |
4.3E-04 |
No |
No |
1.1E-04 |
5.3E-05 |
No |
No |
|||
Chromium |
Sunfish spp. |
0.044 |
0.822 |
0.38 |
0.003 |
RfD |
5.8E-04 |
3.5E-04 |
No |
No |
8.7E-05 |
4.3E-05 |
No |
No |
|||
Thallium |
Bass spp. |
ND |
ND |
ND |
0.00007 |
RfD |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
|||
Thallium |
Catfish |
0.0025 |
0.029 |
0.035 |
0.00007 |
RfD |
5.3E-05 |
3.2E-05 |
No |
No |
8.0E-06 |
3.9E-06 |
No |
No |
|||
Thallium |
Sunfish spp. |
0.0035 |
0.0075 |
0.0068 |
0.00007 |
RfD |
1.0E-05 |
6.3E-06 |
No |
No |
1.6E-06 |
7.7E-07 |
No |
No |
|||
Organics |
|||||||||||||||||
Aldrin |
Bass spp. |
0.0027 |
0.0027 |
0.0027 |
0.00003 |
CMRL |
4.2E-06 |
2.5E-06 |
No |
No |
6.2E-07 |
3.1E-07 |
No |
No |
|||
Aldrin |
Catfish |
0.013 |
0.013 |
0.013 |
0.00003 |
CMRL |
2.0E-05 |
1.2E-05 |
No |
No |
3.0E-06 |
1.5E-06 |
No |
No |
|||
Aldrin |
Sunfish spp. |
0.033 |
0.051 |
0.047 |
0.00003 |
CMRL |
7.3E-05 |
4.4E-05 |
Yes |
Yes |
1.1E-05 |
5.4E-06 |
No |
No |
|||
Dieldrin |
Bass spp. |
0.00097 |
0.015 |
0.0093 |
0.00005 |
CMRL |
1.4E-05 |
8.6E-06 |
No |
No |
2.1E-06 |
1.1E-06 |
No |
No |
|||
Dieldrin |
Catfish |
0.00047 |
0.027 |
0.021 |
0.00005 |
CMRL |
3.2E-05 |
1.9E-05 |
No |
No |
4.8E-06 |
2.4E-06 |
No |
No |
|||
Dieldrin |
Sunfish spp. |
0.0005 |
0.102 |
0.085 |
0.00005 |
CMRL |
1.3E-04 |
7.9E-05 |
Yes |
Yes |
2.0E-05 |
9.8E-06 |
No |
No |
|||
alpha-HCH |
Bass spp. |
0.0002 |
0.0014 |
0.0016 |
0.008 |
CMRL |
2.5E-06 |
1.5E-06 |
No |
No |
3.8E-07 |
1.9E-07 |
No |
No |
|||
alpha-HCH |
Catfish |
0.00045 |
0.013 |
0.016 |
0.008 |
CMRL |
2.4E-05 |
1.4E-05 |
No |
No |
3.6E-06 |
1.8E-06 |
No |
No |
|||
alpha-HCH |
Sunfish spp. |
0.033 |
0.051 |
0.047 |
0.008 |
CMRL |
7.3E-05 |
4.4E-05 |
No |
No |
1.1E-05 |
5.4E-06 |
No |
No |
|||
Heptachlor epoxide |
Bass spp. |
0.0016 |
0.008 |
0.0062 |
0.000013 |
RfD |
9.5E-06 |
5.7E-06 |
No |
No |
1.4E-06 |
7.1E-07 |
No |
No |
|||
Heptachlor epoxide |
Catfish |
0.00052 |
0.013 |
0.0098 |
0.000013 |
RfD |
1.5E-05 |
9.1E-06 |
Yes |
No |
2.3E-06 |
1.1E-06 |
No |
No |
|||
Heptachlor epoxide |
Sunfish spp. |
0.0006 |
0.051 |
0.051 |
0.000013 |
RfD |
7.9E-05 |
4.8E-05 |
Yes |
Yes |
1.2E-05 |
5.9E-06 |
No |
No |
|||
Toxaphene |
Bass spp. |
ND |
ND |
ND |
0.001 |
IMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
|||
Toxaphene |
Catfish |
0.2 |
0.2 |
0.2 |
0.001 |
IMRL |
3.1E-04 |
1.9E-04 |
No |
No |
4.6E-05 |
2.3E-05 |
No |
No |
|||
Toxaphene |
Sunfish spp. |
0.656 |
1.024 |
0.94 |
0.001 |
IMRL |
1.5E-03 |
8.8E-04 |
Yes |
No |
2.2E-04 |
1.1E-04 |
No |
No |
|||
Noncancer subsistence-level doses were calculated using the following formulas:
child dose = (second-tier screening concentration×0.02 kg/day×365 days/year×6 years)/(13 kg×(365 days/year×6 years))
adult dose = (second-tier screening concentration×0.065 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×30 years))
Noncancer recreational-level doses were calculated using the following formulas:
child dose = (second-tier screening concentration×0.003 kg/day×365 days/year×6 years)/(13 kg×(365 days/year×6 years))
adult dose = (second-tier screening concentration×0.008 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×30 years))
The second-tier screening concentrations are rounded.
CMRL = chronic minimal risk level (ATSDR)
conc. = concentration
IMRL = intermediate minimal risk level (ATSDR)
mg/kg/day = milligram per kilogram per day
ND = not detected
ppm = parts per million
RfD = reference dose (EPA)
spp = species
Table 25. Estimated Exposure Doses for Chemicals in Fish Caught in the Clinch River Compared to Cancer Screening Guidelines
Substance Name |
Species |
2nd Tier Screening Conc. |
EPA’s Oral Cancer Slope Factor (mg/kg/day)-1 |
Estimated Exposure Dose (mg/kg/day) |
Risk |
Does the Estimated Exposure Dose Exceed the Cancer Screening Guideline (10-4)? |
|||
|---|---|---|---|---|---|---|---|---|---|
Subsistence |
Recreational |
Subsistence |
Recreational |
Subsistence |
Recreational |
||||
Inorganics |
|||||||||
Arsenic |
Catfish |
0.64 |
1.5 |
2.5E-04 |
3.1E-05 |
3.8E-04 |
4.7E-05 |
Yes |
No |
Arsenic |
Sunfish spp. |
0.79 |
1.5 |
3.2E-04 |
3.9E-05 |
4.7E-04 |
5.8E-05 |
Yes |
No |
Arsenic |
Bass spp. |
0.37 |
1.5 |
1.5E-04 |
1.8E-05 |
2.2E-04 |
2.7E-05 |
Yes |
No |
Cadmium |
Sunfish spp. |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Cadmium |
Catfish |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Cadmium |
Bass spp. |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Chromium |
Bass spp. |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Chromium |
Catfish |
0.47 |
Evaluated for noncarcinogenic effects (see Table 24) |
||||||
Chromium |
Sunfish spp. |
0.38 |
Evaluated for noncarcinogenic effects (see Table 24) |
||||||
Thallium |
Bass spp. |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Thallium |
Catfish |
0.035 |
Evaluated for noncarcinogenic effects (see Table 24) |
||||||
Thallium |
Sunfish spp. |
0.0068 |
Evaluated for noncarcinogenic effects (see Table 24) |
||||||
Organics |
|||||||||
Aldrin |
Bass spp. |
0.0027 |
17 |
1.1E-06 |
1.3E-07 |
1.8E-05 |
2.2E-06 |
No |
No |
Aldrin |
Catfish |
0.013 |
17 |
5.2E-06 |
6.4E-07 |
8.8E-05 |
1.1E-05 |
No |
No |
Aldrin |
Sunfish spp. |
0.051 |
17 |
1.9E-05 |
2.3E-06 |
3.2E-04 |
3.9E-05 |
Yes |
No |
Dieldrin |
Bass spp. |
0.015 |
16 |
3.7E-06 |
4.5E-07 |
5.9E-05 |
7.3E-06 |
No |
No |
Dieldrin |
Catfish |
0.027 |
16 |
8.3E-06 |
1.0E-06 |
1.3E-04 |
1.6E-05 |
Yes |
No |
Dieldrin |
Sunfish spp. |
0.102 |
16 |
3.4E-05 |
4.2E-06 |
5.4E-04 |
6.7E-05 |
Yes |
No |
alpha-HCH |
Bass spp. |
0.0014 |
6.3 |
6.6E-07 |
8.1E-08 |
4.1E-06 |
5.1E-07 |
No |
No |
alpha-HCH |
Catfish |
0.013 |
6.3 |
6.2E-06 |
7.6E-07 |
3.9E-05 |
4.8E-06 |
No |
No |
alpha-HCH |
Sunfish spp. |
0.051 |
6.3 |
1.9E-05 |
2.3E-06 |
1.2E-04 |
1.5E-05 |
Yes |
No |
Heptachlor epoxide |
Bass spp. |
0.008 |
9.1 |
2.5E-06 |
3.0E-07 |
2.2E-05 |
2.8E-06 |
No |
No |
Heptachlor epoxide |
Catfish |
0.013 |
9.1 |
3.9E-06 |
4.8E-07 |
3.5E-05 |
4.4E-06 |
No |
No |
Heptachlor epoxide |
Sunfish spp. |
0.051 |
9.1 |
2.0E-05 |
2.5E-06 |
1.9E-04 |
2.3E-05 |
Yes |
No |
Toxaphene |
Bass spp. |
ND |
1.1 |
ND |
ND |
ND |
ND |
No |
No |
Toxaphene |
Catfish |
0.2 |
1.1 |
8.0E-05 |
9.8E-06 |
8.8E-05 |
1.1E-05 |
No |
No |
Toxaphene |
Sunfish spp. |
1.024 |
1.1 |
3.8E-04 |
4.6E-05 |
4.1E-04 |
5.1E-05 |
Yes |
No |
Cancer subsistence-level doses were calculated using the following formula:
dose = (second-tier screening concentration×0.065 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×70 years))
Cancer recreational-level doses were calculated using the following formula:
dose = (second-tier screening concentration×0.008 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×70 years))
The second-tier screening concentrations are rounded.
conc. = concentration
mg/kg/day = milligram per kilogram per day
NA = not available
ND = not detected
ppm = parts per million
spp = species
Table 26. Estimated Exposure Doses for Chemicals in Fish Caught in WBR Compared to Noncancer Screening Guidelines
Substance Name |
Species |
Minimum (ppm) |
Maximum (ppm) |
2nd Tier Screening Conc. |
Noncancer Screening Guideline (mg/kg/day) |
Source |
Subsistence Estimated Exposure Dose (mg/kg/day) |
Does the Subsistence Estimated Exposure Dose Exceed the Noncancer Screening Guideline? |
Recreational Estimated Exposure Dose (mg/kg/day) |
Does the Recreational Estimated Exposure Dose Exceed the Noncancer Screening Guideline? |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Child |
Adult |
Child |
Adult |
Child |
Adult |
Child |
Adult |
|||||||||||||||||
Inorganics |
||||||||||||||||||||||||
Arsenic |
Catfish |
0.012 |
1.1 |
0.66 |
0.0003 |
CMRL |
1.0E-03 |
6.1E-04 |
Yes |
Yes |
1.5E-04 |
7.5E-05 |
No |
No |
||||||||||
Arsenic |
Unknown |
0.1 |
0.46 |
0.30 |
0.0003 |
CMRL |
4.6E-04 |
2.8E-04 |
Yes |
No |
6.9E-05 |
3.4E-05 |
No |
No |
||||||||||
Arsenic |
Bass spp. |
0.008 |
0.32 |
0.26 |
0.0003 |
CMRL |
3.9E-04 |
2.4E-04 |
Yes |
No |
5.9E-05 |
2.9E-05 |
No |
No |
||||||||||
Arsenic |
Sunfish spp. |
0.006 |
0.83 |
0.32 |
0.0003 |
CMRL |
4.9E-04 |
3.0E-04 |
Yes |
No |
7.4E-05 |
3.7E-05 |
No |
No |
||||||||||
Cadmium |
Catfish |
ND |
ND |
ND |
0.0002 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
||||||||||
Cadmium |
Sunfish spp. |
ND |
ND |
ND |
0.0002 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
||||||||||
Cadmium |
Unknown |
0.05 |
0.06 |
0.062 |
0.0002 |
CMRL |
9.5E-05 |
5.8E-05 |
No |
No |
1.4E-05 |
7.1E-06 |
No |
No |
||||||||||
Chromium |
Catfish |
0.043 |
0.28 |
0.33 |
0.003 |
RfD |
5.1E-04 |
3.1E-04 |
No |
No |
7.6E-05 |
3.8E-05 |
No |
No |
||||||||||
Chromium |
Sunfish spp. |
0.12 |
0.8 |
0.46 |
0.003 |
RfD |
7.0E-04 |
4.2E-04 |
No |
No |
1.1E-04 |
5.2E-05 |
No |
No |
||||||||||
Chromium |
Unknown |
0.1 |
44.6 |
16 |
0.003 |
RfD |
2.5E-02 |
1.5E-02 |
Yes |
Yes |
3.7E-03 |
1.8E-03 |
Yes |
No |
||||||||||
Thallium |
Catfish |
0.0025 |
0.006 |
0.0067 |
0.00007 |
RfD |
1.0E-05 |
6.2E-06 |
No |
No |
1.6E-06 |
7.7E-07 |
No |
No |
||||||||||
Thallium |
Sunfish spp. |
0.0045 |
0.022 |
0.014 |
0.00007 |
RfD |
2.2E-05 |
1.3E-05 |
No |
No |
3.2E-06 |
1.6E-06 |
No |
No |
||||||||||
Organics |
||||||||||||||||||||||||
Aldrin |
Unknown |
ND |
ND |
ND |
0.00003 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
||||||||||
Aldrin |
Sunfish spp. |
0.0056 |
0.048 |
0.049 |
0.00003 |
CMRL |
7.5E-05 |
4.5E-05 |
Yes |
Yes |
1.1E-05 |
5.6E-06 |
No |
No |
||||||||||
Aldrin |
Catfish |
0.00083 |
0.018 |
0.013 |
0.00003 |
CMRL |
2.0E-05 |
1.2E-05 |
No |
No |
3.0E-06 |
1.5E-06 |
No |
No |
||||||||||
Aldrin |
Bass spp. |
0.00054 |
0.014 |
0.009 |
0.00003 |
CMRL |
1.4E-05 |
8.4E-06 |
No |
No |
2.1E-06 |
1.0E-06 |
No |
No |
||||||||||
Dieldrin |
Unknown |
ND |
ND |
ND |
0.00005 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
||||||||||
Dieldrin |
Sunfish spp. |
0.00148 |
0.096 |
0.079 |
0.00005 |
CMRL |
1.2E-04 |
7.3E-05 |
Yes |
Yes |
1.8E-05 |
9.0E-06 |
No |
No |
||||||||||
Dieldrin |
Catfish |
0.00044 |
0.036 |
0.018 |
0.00005 |
CMRL |
2.7E-05 |
1.6E-05 |
No |
No |
4.1E-06 |
2.0E-06 |
No |
No |
||||||||||
Dieldrin |
Bass spp. |
0.0005 |
0.03 |
0.013 |
0.00005 |
CMRL |
2.0E-05 |
1.2E-05 |
No |
No |
3.0E-06 |
1.5E-06 |
No |
No |
||||||||||
alpha-HCH |
Unknown |
ND |
ND |
ND |
0.008 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
||||||||||
alpha-HCH |
Catfish |
0.01 |
0.01 |
0.01 |
0.008 |
CMRL |
1.5E-05 |
9.3E-06 |
No |
No |
2.3E-06 |
1.1E-06 |
No |
No |
||||||||||
alpha-HCH |
Bass spp. |
0.01 |
0.02 |
0.022 |
0.008 |
CMRL |
3.4E-05 |
2.0E-05 |
No |
No |
5.1E-06 |
2.5E-06 |
No |
No |
||||||||||
alpha-HCH |
Sunfish spp. |
0.0056 |
0.048 |
0.049 |
0.008 |
CMRL |
7.5E-05 |
4.5E-05 |
No |
No |
1.1E-05 |
5.6E-06 |
No |
No |
||||||||||
Heptachlor epoxide |
Unknown |
ND |
ND |
ND |
0.000013 |
RfD |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
||||||||||
Heptachlor epoxide |
Sunfish spp. |
0.0013 |
0.048 |
0.048 |
0.000013 |
RfD |
7.4E-05 |
4.5E-05 |
Yes |
Yes |
1.1E-05 |
5.5E-06 |
No |
No |
||||||||||
Heptachlor epoxide |
Catfish |
0.0012 |
0.018 |
0.0096 |
0.000013 |
RfD |
1.5E-05 |
8.9E-06 |
Yes |
No |
2.2E-06 |
1.1E-06 |
No |
No |
||||||||||
Heptachlor epoxide |
Bass spp. |
0.00044 |
0.016 |
0.007 |
0.000013 |
RfD |
1.1E-05 |
6.5E-06 |
No |
No |
1.6E-06 |
8.0E-07 |
No |
No |
||||||||||
TCDD |
Unknown |
8.7E-06 |
8.7E-06 |
9E-06 |
1E-09 |
CMRL |
1.3E-08 |
8.1E-09 |
Yes |
Yes |
2.0E-09 |
9.9E-10 |
Yes |
No |
||||||||||
Toxaphene |
Bass spp. |
0.24 |
0.24 |
0.24 |
0.001 |
IMRL |
3.7E-04 |
2.2E-04 |
No |
No |
5.5E-05 |
2.7E-05 |
No |
No |
||||||||||
Toxaphene |
Catfish |
0.12 |
0.28 |
0.31 |
0.001 |
IMRL |
4.8E-04 |
2.9E-04 |
No |
No |
7.2E-05 |
3.6E-05 |
No |
No |
||||||||||
Toxaphene |
Sunfish spp. |
0.088 |
0.96 |
0.98 |
0.001 |
IMRL |
1.5E-03 |
9.1E-04 |
Yes |
No |
2.3E-04 |
1.1E-04 |
No |
No |
||||||||||
Noncancer subsistence-level doses were calculated using the following formulas:
child dose = (second-tier screening concentration×0.02 kg/day×365 days/year×6 years)/(13 kg×(365 days/year×6 years))
adult dose = (second-tier screening concentration×0.065 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×30 years))
Noncancer recreational-level doses were calculated using the following formulas:
child dose = (second-tier screening concentration×0.003 kg/day×365 days/year×6 years)/(13 kg×(365 days/year×6 years))
adult dose = (second-tier screening concentration×0.008 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×30 years))
The second-tier screening concentrations are rounded.
CMRL = chronic minimal risk level (ATSDR)
conc. = concentration
IMRL = intermediate minimal risk level (ATSDR)
mg/kg/day = milligram per kilogram per day
ND = not detected
ppm = parts per million
RfD = reference dose (EPA)
spp = species
WBR = Watts Bar Reservoir
Unknown = "unknown aquatic animal"
Table 27. Estimated Exposure Doses for Chemicals in Fish Caught in WBR Compared to Cancer Screening Guidelines
Substance Name |
Species |
2nd Tier Screening Conc. |
EPA’s Oral Cancer Slope Factor (mg/kg/day)-1 |
Estimated Exposure Dose (mg/kg/day) |
Risk |
Does the Estimated Exposure Dose Exceed the Cancer Screening Guideline (10-4)? |
|||
|---|---|---|---|---|---|---|---|---|---|
Subsistence |
Recreational |
Subsistence |
Recreational |
Subsistence |
Recreational |
||||
Inorganics |
|||||||||
Arsenic |
Catfish |
0.66 |
1.5 |
2.6E-04 |
3.2E-05 |
3.9E-04 |
4.8E-05 |
Yes |
No |
Arsenic |
Unknown aquatic |
0.30 |
1.5 |
1.2E-04 |
1.5E-05 |
1.8E-04 |
2.2E-05 |
Yes |
No |
Arsenic |
Bass spp. |
0.26 |
1.5 |
1.0E-04 |
1.3E-05 |
1.5E-04 |
1.9E-05 |
Yes |
No |
Arsenic |
Sunfish spp. |
0.32 |
1.5 |
1.3E-04 |
1.6E-05 |
1.9E-04 |
2.4E-05 |
Yes |
No |
Cadmium |
Catfish |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Cadmium |
Sunfish spp. |
ND |
NA |
ND |
ND |
ND |
ND |
No |
No |
Cadmium |
Unknown aquatic |
0.062 |
Evaluated for noncarcinogenic effects (see Table 26) |
||||||
Chromium |
Catfish |
0.33 |
Evaluated for noncarcinogenic effects (see Table 26) |
||||||
Chromium |
Sunfish spp. |
0.46 |
Evaluated for noncarcinogenic effects (see Table 26) |
||||||
Chromium |
Unknown aquatic |
16 |
Evaluated for noncarcinogenic effects (see Table 26) |
||||||
Thallium |
Catfish |
0.0067 |
Evaluated for noncarcinogenic effects (see Table 26) |
||||||
Thallium |
Sunfish spp. |
0.014 |
Evaluated for noncarcinogenic effects (see Table 26) |
||||||
Organics |
|||||||||
Aldrin |
Unknown aquatic |
ND |
17 |
ND |
ND |
ND |
ND |
No |
No |
Aldrin |
Sunfish spp. |
0.049 |
17 |
1.9E-05 |
2.4E-06 |
3.3E-04 |
4.0E-05 |
Yes |
No |
Aldrin |
Catfish |
0.013 |
17 |
5.2E-06 |
6.3E-07 |
8.8E-05 |
1.1E-05 |
No |
No |
Aldrin |
Bass spp. |
0.009 |
17 |
3.6E-06 |
4.4E-07 |
6.1E-05 |
7.5E-06 |
No |
No |
Dieldrin |
Unknown aquatic |
ND |
16 |
ND |
ND |
ND |
ND |
No |
No |
Dieldrin |
Sunfish spp. |
0.079 |
16 |
3.1E-05 |
3.9E-06 |
5.0E-04 |
6.2E-05 |
Yes |
No |
Dieldrin |
Catfish |
0.018 |
16 |
7.1E-06 |
8.7E-07 |
1.1E-04 |
1.4E-05 |
Yes |
No |
Dieldrin |
Bass spp. |
0.013 |
16 |
5.2E-06 |
6.3E-07 |
8.2E-05 |
1.0E-05 |
No |
No |
alpha-HCH |
Unknown aquatic |
ND |
6.3 |
ND |
ND |
ND |
ND |
No |
No |
alpha-HCH |
Catfish |
0.01 |
6.3 |
4.0E-06 |
4.9E-07 |
2.5E-05 |
3.1E-06 |
No |
No |
alpha-HCH |
Bass spp. |
0.022 |
6.3 |
8.8E-06 |
1.1E-06 |
5.5E-05 |
6.8E-06 |
No |
No |
alpha-HCH |
Sunfish spp. |
0.049 |
6.3 |
1.9E-05 |
2.4E-06 |
1.2E-04 |
1.5E-05 |
Yes |
No |
Heptachlor epoxide |
Unknown aquatic |
ND |
9.1 |
ND |
ND |
ND |
ND |
No |
No |
Heptachlor epoxide |
Sunfish spp. |
0.048 |
9.1 |
1.9E-05 |
2.4E-06 |
1.7E-04 |
2.1E-05 |
Yes |
No |
Heptachlor epoxide |
Catfish |
0.0096 |
9.1 |
3.8E-06 |
4.7E-07 |
3.5E-05 |
4.3E-06 |
No |
No |
Heptachlor epoxide |
Bass spp. |
0.007 |
9.1 |
2.8E-06 |
3.4E-07 |
2.5E-05 |
3.1E-06 |
No |
No |
TCDD |
Unknown aquatic |
9E-06 |
150,000 |
3.5E-09 |
4.3E-10 |
5.2E-04 |
6.4E-05 |
Yes |
No |
Toxaphene |
Bass spp. |
0.24 |
1.1 |
9.6E-05 |
1.2E-05 |
1.1E-04 |
1.3E-05 |
Yes |
No |
Toxaphene |
Catfish |
0.31 |
1.1 |
1.2E-04 |
1.5E-05 |
1.4E-04 |
1.7E-05 |
Yes |
No |
Toxaphene |
Sunfish spp. |
0.98 |
1.1 |
3.9E-04 |
4.8E-05 |
4.3E-04 |
5.3E-05 |
Yes |
No |
Cancer subsistence-level doses were calculated using the following formula:
adult dose = (second-tier screening concentration×0.065 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×70 years))
Cancer recreational-level doses were calculated using the following formula:
adult dose = (second-tier screening concentration×0.008 kg/day×365 days/year×30 years)/(70 kg×(365 days/year×70 years))
The second-tier screening concentrations are rounded.
conc. = concentration
mg/kg/day = milligram per kilogram per day
NA = not available
ND = not detected
ppm = parts per million
spp = species
Unknown aquatic = "unknown aquatic animal"
WBR = Watts Bar Reservoir
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