PUBLIC HEALTH ASSESSMENT

EVALUATION OF CURRENT (1990 TO 2003) AND FUTURE CHEMICAL EXPOSURES IN THE VICINITY OF THE OAK RIDGE RESERVATION
U.S. DEPARTMENT OF ENERGY OAK RIDGE RESERVATION
OAK RIDGE, ANDERSON COUNTY, TENNESSEE


TABLES (cont.)

Table 19. Estimated Exposure Doses for Chemicals in Off-Site Sediment Compared to Cancer Screening Guidelines

Substance Name

2nd Tier Screening Conc.
(ppm)

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.
(ppb)

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
Screening Conc.
(ppb)

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.
(ppm)

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)
anthracene

Sunfish spp.

ND

ND

ND

NA

NA

ND

ND

No

No

ND

ND

No

No

Dibenzo(a,h)
anthracene

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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