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.

 

image\v4ht0222.gif  (24)

 

 

image\v4ht0223.gif  (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)