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TitleGeoscience modelling of relative variation in natural arsenic hazard potential in New Brunswick
AuthorKlassen, R A; Douma, S L; Ford, A; Rencz, A; Grunsky, E
SourceGeological Survey of Canada, Current Research (Online) no. 2009-7, 2009, 12 pages, (Open Access)
PublisherNatural Resources Canada
Mediaon-line; digital
File formatpdf (Adobe Acrobat Reader)
ProvinceNew Brunswick
NTS21G; 21H; 21I; 21J; 21N/07; 21N/08; 21N/09; 21N/16; 21O; 21P
Lat/Long WENS-69.0000 -63.5000 48.0000 44.2500
Subjectsenvironmental geology; geochemistry; Health and Safety; arsenic; arsenic geochemistry; heavy metals contamination; environmental analysis; environmental studies; environmental impacts; health hazards; models; modelling; soil geochemistry; human health
Illustrationslocation maps; plots; histograms
Released2009 09 01
AbstractIn eastern Canada, natural arsenic concentrations in bedrock, soil, and water exceed levels associated with acceptable human health risk, and they are linked with enhanced risk for disease. Despite complex and varied exposure pathways, geoscience supports health risk assessment by informing on regional-scale variation in relative geochemical hazard potential, and by providing a stable environmental reference framework that guides decision making. For New Brunswick, a preliminary arsenic hazard model based on bedrock type, mineral composition, geological history, and regional geochemical data supports a two-level hazard code classifi cation, but may be improved to four-level by incorporating information compiled in higher resolution geological maps. In an exploratory, collaborative project with the New Brunswick Department of Health, a revised model will be tested as a predictor for arsenic in well water, an environmental media more closely associated with exposure pathways, and for spatial variation in occurrences of human cancers known to be arsenic related.