Protocol for the Derivation of Environmental and Human ... - CCME

Appendix B
Substituting equation 5 into the definition for B p and the latter into equation 4, and assuming that C s is the
proposed preliminary soil quality guideline (PSQG HH ), and rearranging the equation, then the potential
concentration of the organic chemical in beef can be defined as:
C p = antilog(-7.6 + log K ow )(day/kg) × PSQG HH (mg/kg) × 0.9(kg/day)(mg/kg) [6]
3.2 Human Daily Intake of Contaminants from Meat
Intake resulting from contaminated meat can be defined as:
I b = (M h × M c × B p × PSQG HH ) + (B c × M c × M r ) [7]
BW
Where:
I b
M h
M c
B p
PSQG HH
B c
M r
= total intake of contaminants from beef (mg/kg⋅day)
= percentage of meat home produced
= meat consumption rate (kg/day)
= biotransfer factor for beef
= preliminary human health-based soil quality guideline (mg/kg)
= percentage beef purchased
= average chemical concentration in retail beef (mg/kg)
For non-carcinogens, the receptor is a 13 kg child consuming 31 g of meat (beef, veal, and organ meat)
per day. For carcinogens, the receptor is a 70 kg adult consuming 71 g of meat per day (Health
Canada, 1994). For agricultural land uses, 50% of all meat is assumed to be produced on-site and that
most meat consumed is beef. The average chemical concentration in retail beef is obtained from the
multi-media exposure assessment.
3.3 Bioconcentration of Contaminants in Milk
Travois and Arms (1988) have also studied the bioaccumulation potential of organic contaminants into
milk and developed the following model:
log B m = -8.1 + log K ow , n= 28, r = 0.74 [8]
Where the biotransfer factor for milk B m is defined as:
B m = concentration in whole milk (mg/kg)
daily intake of chemical (mg/day)
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