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Table 19. Estimated Exposure Doses for Chemicals in Off-Site Sediment Compared to Cancer Screening Guidelines
Substance Name |
2nd Tier Screening Conc. |
Estimated Exposure Dose (mg/kg/day) |
EPA’s Oral Cancer Slope Factor (mg/kg/day)-1 |
Risk |
Does the Estimated Exposure Dose Exceed the Cancer Screening Guideline (10-4)? |
|---|---|---|---|---|---|
Inorganics |
|||||
Arsenic |
37 |
7.4E-07 |
1.5 |
1.1E-06 |
No |
Cadmium |
7.3 |
Evaluated for noncarcinogenic effects (see Table 18) |
|||
Copper |
650 |
Evaluated for noncarcinogenic effects (see Table 18) |
|||
Iron |
33,000 |
Evaluated for noncarcinogenic effects (see Table 18) |
|||
Lead |
120 |
Evaluated for noncarcinogenic effects (see Table 18) |
|||
Manganese |
2,700 |
Evaluated for noncarcinogenic effects (see Table 18) |
|||
Organics |
|||||
Aldrin |
0.47 |
9.5E-09 |
17 |
1.6E-07 |
No |
Benzo(a)anthracene |
2.1 |
4.3E-08 |
0.73 |
3.1E-08 |
No |
Benzo(a)pyrene |
2.5 |
5.1E-08 |
7.3 |
3.7E-07 |
No |
Benzo(b)fluoranthene |
3.1 |
6.3E-08 |
0.73 |
4.6E-08 |
No |
Benzo(k)fluoranthene |
2.1 |
4.2E-08 |
0.073 |
3.1E-09 |
No |
bis(2-Chloroethyl) ether |
1.4 |
2.7E-08 |
1.1 |
3.0E-08 |
No |
cis-Chlordane |
4.6 |
9.3E-08 |
0.35 |
3.3E-08 |
No |
trans-Chlordane |
4.6 |
9.3E-08 |
0.35 |
3.3E-08 |
No |
DDD, p,p’- |
1.1 |
2.3E-08 |
0.24 |
5.5E-09 |
No |
DDE, p,p’- |
1.1 |
2.3E-08 |
0.34 |
7.8E-09 |
No |
DDT, p,p’- |
1.1 |
2.3E-08 |
0.34 |
7.7E-09 |
No |
di(2-Ethylhexyl)phthalate |
16 |
3.2E-07 |
0.014 |
4.5E-09 |
No |
Dibenzo(a,h)anthracene |
1.4 |
2.8E-08 |
7.3 |
2.0E-07 |
No |
3,3’-Dichlorobenzidine |
2.7 |
5.4E-08 |
0.45 |
2.4E-08 |
No |
Dieldrin |
1.1 |
2.3E-08 |
16 |
3.6E-07 |
No |
Heptachlor |
0.46 |
9.3E-09 |
4.5 |
4.2E-08 |
No |
Heptachlor epoxide |
0.48 |
9.7E-09 |
9.1 |
8.8E-08 |
No |
Hexachlorobenzene |
1.4 |
2.7E-08 |
1.6 |
4.4E-08 |
No |
HCH, alpha- |
0.48 |
9.7E-09 |
6.3 |
6.1E-08 |
No |
HCH, beta- |
0.48 |
9.7E-09 |
1.8 |
1.7E-08 |
No |
HCH, delta- |
0.48 |
9.7E-09 |
1.3 |
1.3E-08 |
No |
HCH, gamma- |
0.48 |
9.7E-09 |
1.3 |
1.3E-08 |
No |
HCDD |
0.00068 |
1.4E-11 |
6,200 |
8.5E-08 |
No |
Indeno(1,2,3-cd)pyrene |
1.8 |
3.5E-08 |
0.73 |
2.6E-08 |
No |
n-Nitrosodi-n-propylamine |
1.4 |
2.7E-08 |
7 |
1.9E-07 |
No |
Pentachlorophenol |
6.4 |
1.3E-07 |
0.12 |
1.5E-08 |
No |
Toxaphene |
12 |
2.3E-07 |
1.1 |
2.6E-07 |
No |
Doses were calculated using the following formula:
dose = (second-tier screening concentration×0.0001 kg/day×12 days/year×30 years)/(70 kg×(365 days/year×70 years))
Risk was calculated by multiplying the cancer dose by EPA's oral cancer slope factor.
The second-tier screening concentrations are rounded.
conc. = concentration
mg/kg/day = milligram per kilogram per day
ppm = parts per million
Table 20. Estimated Exposure Doses for Chemicals in Off-Site Surface Water Compared to Noncancer Screening Guidelines
Substance Name |
Minimum (ppb) |
Maximum (ppb) |
2nd Tier Screening Conc. |
Estimated Exposure Dose (mg/kg/day) |
Noncancer Screening Guideline (mg/kg/day) |
Source |
Does the Estimated Exposure Dose Exceed the Noncancer Screening Guideline? |
||
|---|---|---|---|---|---|---|---|---|---|
Child |
Adult |
Child |
Adult |
||||||
Inorganics |
|||||||||
Aluminum |
6.2 |
21,000 |
1,400 |
1.8E-03 |
3.3E-04 |
1 |
RfD |
No |
No |
Ammonia |
20 |
13,000 |
5,700 |
7.2E-03 |
1.3E-03 |
0.3 |
IMRL |
No |
No |
Antimony* |
0.1 |
41 |
49 |
6.2E-05 |
1.2E-05 |
0.0004 |
RfD |
No |
No |
Arsenic* |
0.76 |
69 |
40 |
5.0E-05 |
9.4E-06 |
0.0003 |
CMRL/RfD |
No |
No |
Barium |
6.4 |
250 |
71.5 |
9.0E-05 |
1.7E-05 |
0.07 |
RfD |
No |
No |
Beryllium* |
0.03 |
26 |
1.6 |
2.0E-06 |
3.8E-07 |
0.002 |
CMRL/RfD |
No |
No |
Boron |
3.16 |
470 |
77 |
9.8E-05 |
1.8E-05 |
0.09 |
RfD |
No |
No |
Cadmium* |
0.2 |
13 |
2.9 |
3.7E-06 |
6.8E-07 |
0.0002 |
CMRL |
No |
No |
Chlorine |
2 |
1,400 |
430 |
5.4E-04 |
1.0E-04 |
0.1 |
RfD |
No |
No |
Chromium |
0.25 |
70 |
11.5 |
1.5E-05 |
2.7E-06 |
0.003 |
RfD (CrVI) |
No |
No |
Copper |
0.7 |
381 |
42 |
5.4E-05 |
9.9E-06 |
0.04 |
RfD |
No |
No |
Iron |
4.8 |
1,100,000 |
41,000 |
5.2E-02 |
9.7E-03 |
0.3 |
RfD |
No |
No |
Lead |
0.29 |
370 |
28 |
3.6E-05 |
6.7E-06 |
0.02 |
Acute LOAEL |
No |
No |
Lithium |
1.3 |
4,050 |
340 |
4.3E-04 |
8.1E-05 |
0.02 |
RfD |
No |
No |
Manganese |
1.07 |
2,430 |
220 |
2.8E-04 |
5.1E-05 |
0.05 |
RfD |
No |
No |
Nickel |
0.37 |
49 |
10 |
1.3E-05 |
2.4E-06 |
0.02 |
RfD |
No |
No |
Nitrate |
80 |
52,800 |
11,000 |
1.4E-02 |
2.5E-03 |
1.6 |
RfD |
No |
No |
Nitrate and nitrite |
100 |
47,500 |
6,300 |
7.9E-03 |
1.5E-03 |
0.1 |
RfD (nitrite) |
No |
No |
Selenium* |
0.97 |
54 |
55 |
6.9E-05 |
1.3E-05 |
0.005 |
CMRL/RfD |
No |
No |
Silver |
0.36 |
61 |
13 |
1.6E-05 |
3.0E-06 |
0.005 |
RfD |
No |
No |
Thallium*§ |
0.5 |
39 |
46 |
5.8E-05 |
1.1E-05 |
0.00007 |
RfD |
No |
No |
Vanadium |
0.35 |
81 |
14 |
1.7E-05 |
3.2E-06 |
0.007 |
RfD |
No |
No |
Zinc |
0.88 |
1,270 |
150 |
1.9E-04 |
3.5E-05 |
0.3 |
CMRL |
No |
No |
Organics |
|||||||||
Aldrin* |
0.0063 |
0.052 |
0.07 |
9.4E-08 |
1.8E-08 |
0.00003 |
CMRL/RfD |
No |
No |
Benzene* |
0.3 |
10 |
4.6 |
5.8E-06 |
1.1E-06 |
0.003 |
RfD |
No |
No |
Benzo(a)anthracene* |
0.9 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Benzo(a)pyrene* |
10 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Benzo(b)fluoranthene* |
0.8 |
17 |
5.8 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Benzo(k)fluoranthene* |
1.2 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Bis(2-chloroethyl) ether* |
10 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Bromodichloromethane |
1 |
10 |
3.1 |
3.9E-06 |
7.3E-07 |
0.02 |
CMRL |
No |
No |
Bromoform* |
1 |
10 |
4.2 |
5.3E-06 |
9.8E-07 |
0.2 |
CMRL/RfD |
No |
No |
Carbazole* |
10 |
10 |
5.3 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Carbon tetrachloride*§ |
1 |
10 |
13 |
1.7E-05 |
3.1E-06 |
0.0007 |
RfD |
No |
No |
cis-Chlordane* |
0.0063 |
0.5 |
0.13 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
trans-Chlordane* |
0.0063 |
0.5 |
0.13 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Chlorodibromomethane* |
5 |
10 |
4.6 |
5.8E-06 |
1.1E-06 |
0.03 |
CMRL |
No |
No |
Chloroethane* |
1.6 |
34 |
6.5 |
8.2E-06 |
1.5E-06 |
0.4 |
RfD |
No |
No |
Chloromethane* |
1 |
10 |
5.9 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Chrysene* |
1 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Dibenzo(a,h)anthracene* |
10 |
10 |
5.8 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
3,3'-Dichlorobenzidine* |
10 |
20 |
11 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
1,2-Dichloroethane* |
1 |
100 |
9.1 |
1.1E-05 |
2.1E-06 |
0.03 |
RfD |
No |
No |
1,3-Dichloropropene, cis-* |
5 |
10 |
4.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
1,3-Dichloropropene, trans-* |
5 |
10 |
4.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Di(2-ethylhexyl)phthalate |
0.6 |
230 |
39 |
4.9E-05 |
9.1E-06 |
0.06 |
CMRL |
No |
No |
Dieldrin* |
0.0049 |
0.1 |
0.2 |
1.9E-07 |
3.6E-08 |
0.00005 |
CMRL/RfD |
No |
No |
2,4-Dinitrophenol* |
25 |
50 |
27 |
3.4E-05 |
6.3E-06 |
0.002 |
RfD |
No |
No |
4,6-Dinitro-o-cresol* |
25 |
50 |
26 |
3.3E-05 |
6.1E-06 |
0.0001 |
RfD |
No |
No |
HCDD |
0.000013 |
0.000013 |
0.000013 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Heptachlor* |
0.0063 |
0.052 |
0.07 |
9.4E-08 |
1.8E-08 |
0.0005 |
RfD |
No |
No |
Heptachlor epoxide* |
0.0034 |
0.052 |
0.07 |
9.4E-08 |
1.8E-08 |
0.000013 |
RfD |
No |
No |
Hexachlorobenzene* |
10 |
10 |
5.6 |
7.1E-06 |
1.3E-06 |
0.00005 |
CMRL |
No |
No |
Hexachlorobutadiene* |
10 |
10 |
5.6 |
7.1E-06 |
1.3E-06 |
0.0002 |
RfD |
No |
No |
alpha-HCH* |
0.0063 |
0.052 |
0.07 |
9.4E-08 |
1.7E-08 |
0.008 |
CMRL |
No |
No |
beta-HCH* |
0.0063 |
0.052 |
0.07 |
9.4E-08 |
1.7E-08 |
0.0006 |
IMRL |
No |
No |
delta-HCH* |
0.0063 |
0.052 |
0.07 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Hexachloroethane* |
10 |
10 |
5.6 |
7.1E-06 |
1.3E-06 |
0.001 |
RfD |
No |
No |
Indeno(1,2,3-cd)pyrene* |
1 |
10 |
5.7 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Methoxychlor* |
0.063 |
260 |
23 |
2.9E-05 |
5.5E-06 |
0.005 |
RfD |
No |
No |
Methylene chloride |
0.5 |
52 |
15 |
1.9E-05 |
3.5E-06 |
0.06 |
CMRL |
No |
No |
2-Nitroaniline* |
10 |
50 |
27 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
3-Nitroaniline* |
10 |
50 |
27 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
4-Nitroaniline* |
10 |
50 |
26 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Nitrobenzene* |
10 |
10 |
5.6 |
7.1E-06 |
1.3E-06 |
0.0005 |
RfD |
No |
No |
n-Nitrosodi-n-propylamine* |
10 |
10 |
5.6 |
7.1E-06 |
1.3E-06 |
0.095 |
AMRL |
No |
No |
n-Nitrosodiphenylamine* |
10 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Pentachlorophenol* |
25 |
50 |
26 |
|
|
0.001 |
CMRL |
No |
No |
TCDD |
0.00002 |
0.00002 |
0.00002 |
2.5E-11 |
4.7E-12 |
1.0E-09 |
CMRL |
No |
No |
1,1,2,2-Tetrachloroethane* |
1 |
10 |
4.6 |
5.8E-06 |
1.1E-06 |
0.04 |
CMRL |
No |
No |
1,1,2-Trichloroethane* |
5 |
10 |
4.6 |
5.8E-06 |
1.1E-06 |
0.004 |
RfD |
No |
No |
2,4,6-Trichlorophenol* |
10 |
10 |
5.6 |
Evaluated for carcinogenic effects (see Table 21) |
|||||
Toxaphene* |
0.63 |
5.2 |
2.7 |
3.4E-06 |
6.3E-07 |
0.001 |
IMRL |
No |
No |
Trichloroethylene |
0.34 |
23 |
8.1 |
1.0E-05 |
1.9E-06 |
0.0003 |
RfD |
No |
No |
Vinyl chloride* |
5 |
10 |
5.7 |
7.2E-06 |
1.3E-06 |
0.00002 |
CMRL |
No |
No |
Doses were calculated using the following formulas:
child dose = ((second-tier screening concentration/1,000)×0.5 liters/day×12 days/year×6 years)/(13 kg×(365 days/year×6 years))
adult dose = ((second-tier screening concentration/1,000)×0.5 liters/day×12 days/year×30 years)/(70 kg×(365 days/year×30 years))
The second-tier screening concentrations are rounded.
* Chemical was detected in less than 10% of the samples. The second-tier screening concentration was estimated using 1/2 the detection limit for nondetected samples.
§ The thallium and carbon tetrachloride data contained outliers that were three orders of magnitude higher than the second highest concentration. These data points were removed.
CMRL = chronic minimal risk level (ATSDR)
conc. = concentration
CrVI = chromium VI
IMRL = intermediate minimal risk level (ATSDR)
LOAEL = lowest observed adverse effect level (ATSDR)
mg/kg/day = milligram per kilogram per day
ppb = parts per billion
RfD = reference dose (EPA)
Table 21. Estimated Exposure Doses for Chemicals in Off-Site Surface Water Compared to Cancer Screening Guidelines
Substance Name |
2nd Tier |
Estimated Exposure Dose (mg/kg/day) |
EPA’s Oral Cancer Slope Factor (mg/kg/day)-1 |
Risk |
Does the Estimated Exposure Dose Exceed the Cancer Screening Guideline (10-4)? |
|---|---|---|---|---|---|
Inorganics |
|||||
Aluminum |
1,400 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Ammonia |
5,700 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Antimony* |
49 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Arsenic* |
40 |
4.0E-06 |
1.5 |
6.0E-06 |
No |
Barium |
71.5 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Beryllium* |
1.6 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Boron |
77 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Cadmium* |
2.9 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Chlorine |
430 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Chromium |
11.5 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Copper |
42 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Iron |
41,000 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Lead |
28 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Lithium |
340 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Manganese |
220 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Nickel |
10 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Nitrate |
11,000 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Nitrate and nitrite |
6,300 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Selenium* |
55 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Silver |
13 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Thallium*§ |
46 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Vanadium |
14 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Zinc |
150 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Organics |
|||||
Aldrin* |
0.07 |
7.5E-09 |
17 |
1.3E-07 |
No |
Benzene* |
4.6 |
4.6E-07 |
0.055 |
2.5E-08 |
No |
Benzo(a)anthracene* |
5.6 |
5.6E-07 |
0.73 |
4.1E-07 |
No |
Benzo(a)pyrene* |
5.6 |
5.7E-07 |
7.3 |
4.1E-06 |
No |
Benzo(b)fluoranthene* |
5.8 |
5.8E-07 |
0.73 |
4.3E-07 |
No |
Benzo(k)fluoranthene* |
5.6 |
5.6E-07 |
0.073 |
4.1E-08 |
No |
Bis(2-chloroethyl) ether* |
5.6 |
5.6E-07 |
1.1 |
6.2E-07 |
No |
Bromodichloromethane |
3.1 |
3.1E-07 |
0.062 |
1.9E-08 |
No |
Bromoform* |
4.2 |
4.2E-07 |
0.0079 |
3.3E-09 |
No |
Carbazole* |
5.3 |
5.3E-07 |
0.02 |
1.1E-08 |
No |
Carbon tetrachloride*§ |
13 |
1.3E-06 |
0.13 |
1.7E-07 |
No |
cis-Chlordane* |
0.13 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
trans-Chlordane* |
0.13 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Chlorodibromomethane* |
4.6 |
6.5E-07 |
0.0029 |
1.9E-09 |
No |
Chloroethane* |
6.5 |
5.9E-07 |
0.013 |
7.7E-09 |
No |
Chloromethane* |
5.9 |
5.6E-07 |
0.0073 |
4.1E-09 |
No |
Chrysene* |
5.6 |
5.8E-07 |
7.3 |
4.2E-06 |
No |
Dibenzo(a,h)anthracene* |
5.8 |
1.1E-06 |
0.45 |
5.0E-07 |
No |
3,3'-Dichlorobenzidine* |
11 |
9.1E-07 |
0.091 |
8.3E-08 |
No |
1,2-Dichloroethane* |
9.1 |
6.5E-07 |
0.0029 |
1.9E-09 |
No |
1,3-Dichloropropene, cis-* |
4.6 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
1,3-Dichloropropene, trans-* |
4.6 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Di(2-ethylhexyl)phthalate |
39 |
3.9E-06 |
0.014 |
5.5E-08 |
No |
Dieldrin* |
0.2 |
1.5E-08 |
16 |
2.5E-07 |
No |
2,4-Dinitrophenol* |
27 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
4,6-Dinitro-o-cresol* |
26 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
HCDD |
0.000013 |
1.3E-12 |
6,200 |
8.2E-09 |
No |
Heptachlor* |
0.07 |
7.5E-09 |
4.5 |
3.4E-08 |
No |
Heptachlor epoxide* |
0.07 |
7.5E-09 |
9.1 |
6.8E-08 |
No |
Hexachlorobenzene* |
5.6 |
5.6E-07 |
1.6 |
9.0E-07 |
No |
Hexachlorobutadiene* |
5.6 |
5.6E-07 |
0.078 |
4.4E-08 |
No |
alpha-HCH* |
0.07 |
7.5E-09 |
6.3 |
4.7E-08 |
No |
beta-HCH* |
0.07 |
7.5E-09 |
1.8 |
1.3E-08 |
No |
delta-HCH* |
0.07 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Hexachloroethane* |
5.6 |
5.6E-07 |
0.014 |
7.9E-09 |
No |
Indeno(1,2,3-cd)pyrene* |
5.7 |
5.8E-07 |
0.73 |
4.2E-07 |
No |
Methoxychlor* |
23 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Methylene chloride |
15 |
1.5E-06 |
0.0075 |
1.1E-08 |
No |
2-Nitroaniline* |
27 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
3-Nitroaniline* |
27 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
4-Nitroaniline* |
26 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
Nitrobenzene* |
5.6 |
Evaluated for noncarcinogenic effects (see Table 20) |
|||
N-nitrosodi-n-propylamine* |
5.6 |
5.6E-07 |
7 |
4.0E-06 |
No |
N-nitrosodiphenylamine* |
5.6 |
5.6E-07 |
0.0049 |
2.8E-09 |
No |
Pentachlorophenol* |
26 |
2.6E-06 |
0.12 |
3.1E-07 |
No |
TCDD |
0.00002 |
2.0E-12 |
150,000 |
3.0E-07 |
No |
1,1,2,2-Tetrachloroethane* |
4.6 |
4.6E-07 |
0.2 |
9.2E-08 |
No |
1,1,2-Trichloroethane* |
4.6 |
4.6E-07 |
0.057 |
2.6E-08 |
No |
2,4,6-Trichlorophenol* |
5.6 |
5.6E-07 |
0.011 |
6.2E-09 |
No |
Toxaphene* |
2.7 |
2.7E-07 |
1.1 |
3.0E-07 |
No |
Trichloroethylene |
8.1 |
8.2E-07 |
0.4 |
3.3E-07 |
No |
Vinyl chloride* |
5.7 |
5.8E-07 |
1.4 |
8.1E-07 |
No |
Doses were calculated using the following formula:
dose = ((second-tier screening concentration/1,000)×0.5 liters/day×12 days/year×30 years)/(70 kg×(365 days/year×70 years))
Risk was calculated by multiplying the exposure dose by EPA's oral cancer slope factor.
The second-tier screening concentrations are rounded.
*Chemical was detected in less than 10% of the samples. The second-tier screening concentration was estimated using 1/2 the detection limit for nondetected samples.
§ The thallium and carbon tetrachloride data contained outliers that were three orders of magnitude higher than the second highest concentration. These data points were removed.
conc. = concentration
mg/kg/day = milligram per kilogram per day
ppb = parts per billion
Table 22. Estimated Exposure Doses for Chemicals in Fish Caught in EFPC 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 |
Crayfish |
0.2557 |
0.5122 |
0.51 |
0.0003 |
CMRL |
7.9E-04 |
4.7E-04 |
Yes |
Yes |
1.2E-04 |
5.8E-05 |
No |
No |
Arsenic |
Sunfish spp. |
0.0484 |
0.1721 |
0.12 |
0.0003 |
CMRL |
2.6E-04 |
1.5E-04 |
No |
No |
3.8E-05 |
1.9E-05 |
No |
No |
Cadmium |
Crayfish |
2.1588 |
3.7445 |
3.7 |
0.0002 |
CMRL |
5.7E-03 |
3.4E-03 |
Yes |
Yes |
8.5E-04 |
4.2E-04 |
Yes |
Yes |
Cadmium |
Sunfish spp. |
0.3654 |
1.8589 |
1.7 |
0.0002 |
CMRL |
2.7E-03 |
1.6E-03 |
Yes |
Yes |
4.0E-04 |
2.0E-04 |
Yes |
No |
Chromium |
Crayfish |
0.3473 |
3.2609 |
2.9 |
0.003 |
RfD |
4.4E-03 |
2.7E-03 |
Yes |
No |
6.6E-04 |
3.3E-04 |
No |
No |
Chromium |
Sunfish spp. |
0.1997 |
0.7746 |
0.64 |
0.003 |
RfD |
9.8E-04 |
5.9E-04 |
No |
No |
1.5E-04 |
7.3E-05 |
No |
No |
Organics |
||||||||||||||
Aldrin |
Sunfish spp. |
ND |
ND |
ND |
0.00003 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
Aldrin |
Crayfish |
0.00099 |
0.0012 |
0.0012 |
0.00003 |
CMRL |
1.9E-06 |
1.2E-06 |
No |
No |
2.9E-07 |
1.4E-07 |
No |
No |
Benzo(a)pyrene |
Sunfish spp. |
ND |
ND |
ND |
NA |
NA |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
Benzo(a)pyrene |
Crayfish |
0.0023 |
0.041 |
0.033 |
Evaluated for carcinogenic effects (see Table 23) |
|||||||||
Dibenzo(a,h) |
Sunfish spp. |
ND |
ND |
ND |
NA |
NA |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
Dibenzo(a,h) |
Crayfish |
0.0011 |
0.047 |
0.037 |
Evaluated for carcinogenic effects (see Table 23) |
|||||||||
Dieldrin |
Crayfish |
0.002 |
0.0049 |
0.0052 |
0.00005 |
CMRL |
7.9E-06 |
4.8E-06 |
No |
No |
1.2E-06 |
5.9E-07 |
No |
No |
Dieldrin |
Sunfish spp. |
0.0065 |
0.079 |
0.066 |
0.00005 |
CMRL |
1.0E-04 |
6.1E-05 |
Yes |
Yes |
1.5E-05 |
7.5E-06 |
No |
No |
alpha-HCH |
Sunfish spp. |
ND |
ND |
ND |
0.008 |
CMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
alpha-HCH |
Crayfish |
0.0016 |
0.0057 |
0.0053 |
0.008 |
CMRL |
8.2E-06 |
5.0E-06 |
No |
No |
1.2E-06 |
6.1E-07 |
No |
No |
Heptachlor epoxide |
Crayfish |
0.00027 |
0.0027 |
0.0027 |
0.000013 |
RfD |
4.1E-06 |
2.5E-06 |
No |
No |
6.2E-07 |
3.1E-07 |
No |
No |
Heptachlor epoxide |
Sunfish spp. |
0.0021 |
0.08 |
0.068 |
0.000013 |
RfD |
1.0E-04 |
6.3E-05 |
Yes |
Yes |
1.6E-05 |
7.7E-06 |
Yes |
No |
Toxaphene |
Crayfish |
ND |
ND |
ND |
0.001 |
IMRL |
ND |
ND |
No |
No |
ND |
ND |
No |
No |
Toxaphene |
Sunfish spp. |
ND |
ND |
ND |
0.001 |
IMRL |
ND |
ND |
No |
No |
ND |
ND |
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
EFPC = East Fork Poplar Creek
IMRL = intermediate minimal risk level (ATSDR)
mg/kg/day = milligram per kilogram per day
NA = not available
ND = not detected
ppm = parts per million
RfD = reference dose (EPA)
spp = species
Unknown = "unknown aquatic animal"
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