Pathways analysis of 13 priority substances for PSL2 assessment using fugacity modeling

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:442866

Cureton, P M; Lloyd, K ^[1]; Mackay, D ^[2]; Southwood, J ^[3]

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1. Environment Canada, Ottawa, Ontario (Canada). Commercial Chemicals Evaluation Branch
2. DMER, Peterborough, Ontario (Canada)
3. Angus Environmental Ltd., Don Mills, Ontario (Canada)

The Canadian Environmental Protection Act (CEPA) requires the Ministers of the Environment and of Health to establish a Priority Substances List (PSL), that identifies substances to be assessed on a priority basis to determine whether they pose a significant risk to the health of Canadians or to the environment. The second Priority Substances List was released in December 1995 and consists of 25 substances which must be assessed. One of the preliminary steps in assessing these substances is an evaluation of the predicted behavior and fate of the substance in the Canadian environment. Pathways analysis using multimedia fugacity models provided information on the likely environmental partitioning and transformation characteristics. Following a critical evaluation of the physical-chemical values required for the model, Level 1, 2 and 3 fugacity modeling was done on the following 13 PSL2 substances: acetaldehyde, acrylonitrile, butylbenzylphthalate (BBP), carbon disulfide, N,N-Dimethylformamide (DMF), and ethylene oxide, formaldehyde, hexachlorobutadiene, 2-methoxy ethanol, 2-ethoxy ethanol, 2-butoxy ethanol, nitrosodimethylamine (NDMA), and phenol. CHEMCAN was also run using emission rates for appropriate region of Canada. The results of the model results will be discussed in light of problem formulation for ecological risk assessment of these priority substances.

• OSTI ID: 442866
• Report Number(s): CONF-961149--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
ACETALDEHYDE
ACRYLONITRILE
AMIDES
CARBON SULFIDES
ENVIRONMENTAL EXPOSURE PATHWAY
ENVIRONMENTAL IMPACTS
ETHANOL
FORMALDEHYDE
HEALTH HAZARDS
MATHEMATICAL MODELS
NITROSO COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
PHENOL
PHTHALATES