Table 1 in Perspective: Naturally Occurring Metals in Fine-Grained Champlain Sea Deposits, Ottawa

Mitchell Dawley, Rebecca Hardie, Anthony West

In the proceedings of: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNC

Session: Geoenvironmental II

ABSTRACT: Repeated cycles of glaciation have significantly influenced the physiography of Eastern Ontario. Deglaciation of the last ice age resulted in the formation of the Champlain Sea, an inland arm of the Atlantic Ocean (10,000-12,000 years BP). The sea basin be-Ottawa Valley region. The Champlain Sea deposits have notable implications for soil and sediment environmental standards in the region. As part of the Stage 2 Ottawa Light Rail Transit subsurface investigation, drilling occurred within these deposits, and barium, chromium, cobalt and hexavalent chromium were routinely detected in soil at concentrations above MOECC Table 1, while vanadium was detected above MOECC Table 3. It is hoped that this paper presents evidence that will be useful to support appropriate excess soil management decisions for future construction projects.

RÉSUMÉ: Les cycles répétés de glaciation ont influencé la physiographie de l'est de l'Ontario. La déglaciation de l'ère glaciaire a entraîné la Champlain Sea, un bras de l'océan Atlantique (10 000-12 000 ans BP). Le bassin est devenu un dépositaire glaciomarine et explique les sédiments à grain fin dans la région de St.Lawrence Lowlands-Ottawa Valley. Les gisements de la Champlain Sea ont des implications pour les normes environnementales des sols et sédiments. Dans le cadre de l'étude de la sous-surface du Stage 2 Light Rail Transit des forages se sont produits dans ces dépôts, et le chrome, baryum, chrome, cobalt et au chrome-hexavalent a été détecté dans le sol en concentration au-dessus du tableau MOECC 1, tandis que le vanadium a été détecté au-dessus du tableau MOECC 3. On espère que cet article présente des preuves qui seront utiles pour soutenir des décisions appropriées en matière de gestion des sols pour les futurs projets de construction.

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Cite this article:
Mitchell Dawley; Rebecca Hardie; Anthony West (2017) Table 1 in Perspective: Naturally Occurring Metals in Fine-Grained Champlain Sea Deposits, Ottawa in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2017Paper800,author = Mitchell Dawley; Rebecca Hardie; Anthony West,title = Table 1 in Perspective: Naturally Occurring Metals in Fine-Grained Champlain Sea Deposits, Ottawa,year = 2017}