contents   index   previous   next

Surface Water Fish Ingestion

 

Equation 24 (non-radionuclides), equation 25 (radionuclides), and Table 16 present the exposure variables for the surface water fish ingestion pathway. The fish ingestion pathway is conducted for the recreational pathway only.

 

 

 

(24)

 

 

 

 

 

(25)

 

 

 

Table 16. Surface Water Fish 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

 

 

 

Fish transfer coefficient = Bfish

 

 

 

day/L

 

 

 

Chemical-specific

 

 

 

Ingestion Rate = IRm

 

 

 

kg/fish meal

 

 

 

0.054 (adult)

 

(EPA 1991a)

 

 

 

Exposure frequency = EF

 

 

 

fish meal /year

 

 

 

45

 

(EPA 1995)

 

 

 

Exposure duration = ED

 

 

 

years

 

 

 

30

 

(EPA 1989a)

 

 

 

Body weight = BW

 

 

 

kg

 

 

 

70 (adult)

 

(EPA 1991a)

 

 

 

Conversion Factor = CF2

 

 

 

days/yr

 

 

 

365

 

 

 

Lifetime = LT

 

 

 

years

 

 

 

70

 

(EPA 1989a)

 

 

 

Averaging time = AT

 

 

 

years

 

 

 

LT (carcinogen)

 

ED (noncarcinogen)