Surface Water/Groundwater Beef Ingestion

Equation 20 (non-radionuclides), equation 21 (radionuclides), and Table 14 present the exposure variables for the surface water/groundwater beef ingestion pathway. The beef ingestion pathway is conducted for the agricultural pathway only.

(20)

(21)

Table 14. Surface Water/ Groundwater Beef Ingestion Parameters

Parameter

Units

Agricultural

Non-radionuclide chemical concentration in water = Cwn

mg/L

Chemical-specific

Radionuclide chemical concentration in water = Cwr

pCi/L

Chemical-specific

Quantity of water ingested (cattle) = Qw

L/day

50

(IAEA 1994)

Beef transfer coefficient = Bf

day/kg

Chemical-specific

Ingestion ratec = IR

kg/day

0.075

(EPA 1989b)

Conversion factor = CF

g/kg

1000

Diet fraction = FI

unitless

1

Exposure frequency = EF

day/yr

350

(EPA 1989a)

Exposure duration = ED

years

30

(EPA 1989a)

Body weight = BW

kg

70

(EPA 1989a)

Conversion Factor = CF2

days/yr

365

Lifetime = LT

years

70

(EPA 1989a)

Averaging time = AT

years

LT (carcinogen)

ED (noncarcinogen)