Proceedings - Teaching and Learning Centre - Simon Fraser ...
Proceedings - Teaching and Learning Centre - Simon Fraser ... Proceedings - Teaching and Learning Centre - Simon Fraser ...
Fraser River Action Plan 3rd Research Workshop Survey of Contaminants in Suspended Sediment and Water in the Fraser River Basin M. Sekela, R. Brewer, C. Baldazzi, G. Moyle and T. Tuominen Environment Canada Abstract Concentrations of trace organic contaminants (dioxins, furans, chlorophenolics, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides, fatty acids and resin acids) were measured in suspended sediments and/or water samples collected upstream and downstream of six pulp mills located in the Fraser River basin. Sampling was conducted under fall low-flow conditions over three consecutive years (1992 - 1994) and under winter base-flow conditions in February 1993. Concentrations of contaminants in both sediment and water were used to calculate log Koc values for dioxins, furans, chlorophenolics and polycyclic aromatic hydrocarbons. Results indicated that: 1. dioxins, furans, chlorophenolics, polycyclic aromatic hydrocarbons, fatty acids and resin acids, measured in suspended sediments, were found in higher concentrations downstream of pulp and paper mills than at reference sites upstream of the mills; 2. these contaminants were generally found in higher concentrations during winter base-flow periods than under fall low-flow conditions; 3. concentrations of 2,3,7,8-T4CDD and 2,3,7,8-T4CDF in suspended sediments have decreased from levels measured in 1990 prior to implementation of pulp mill abatement measures; 4. phase partitioning of polycyclic aromatic hydrocarbons between sediment and water was highly variable and appeared to be influenced by site-specific environmental conditions; and, 5. none of the organic contaminants exceeded existing federal guidelines or provincial water quality criteria for the protection of aquatic life. However, guidelines or criteria currently do not exist for many organic contaminants which were measured at elevated levels downstream of the mills. Page 71
Fraser River Action Plan 3rd Research Workshop Study Objectives • To determine the geographical distribution and concentration of chlorinated organic contaminants and PAHs in Fraser River Basin suspended sediment and water during different flow conditions • To determine what effect pulp mill abatement measures, introduced in 1991, have had on levels of 2,3,7,8-TCDD and 2,3,7,8 -TCDF in suspended sediment from the Fraser River Basin W N S E Cariboo Pulp and Paper Company Quesnel River Pulp Company 66 0 66 132 Kilometers Nechako River Prince George Page 72 Quesnel Chilcotin River Fraser River Vancouver Northwood Pulp and Timber Ltd. Canadian Forest Products (two mills) Thompson Hope River N. ThompsonR. Kamloops Weyerhaeuser Canada Ltd. Location of Pulp and/or Paper Mills in the Upper Fraser River Basin
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<strong>Fraser</strong> River Action Plan 3rd Research Workshop<br />
Study Objectives<br />
• To determine the geographical distribution <strong>and</strong><br />
concentration of chlorinated organic contaminants <strong>and</strong><br />
PAHs in <strong>Fraser</strong> River Basin suspended sediment <strong>and</strong><br />
water during different flow conditions<br />
• To determine what effect pulp mill abatement<br />
measures, introduced in 1991, have had on levels of<br />
2,3,7,8-TCDD <strong>and</strong> 2,3,7,8 -TCDF in suspended sediment<br />
from the <strong>Fraser</strong> River Basin<br />
W<br />
N<br />
S<br />
E<br />
Cariboo Pulp <strong>and</strong><br />
Paper Company<br />
Quesnel River Pulp<br />
Company<br />
66 0 66 132 Kilometers<br />
Nechako River<br />
Prince George<br />
Page 72<br />
Quesnel<br />
Chilcotin River<br />
<strong>Fraser</strong> River<br />
Vancouver<br />
Northwood Pulp <strong>and</strong> Timber<br />
Ltd.<br />
Canadian Forest Products<br />
(two mills)<br />
Thompson<br />
Hope<br />
River<br />
N. ThompsonR.<br />
Kamloops<br />
Weyerhaeuser<br />
Canada Ltd.<br />
Location of Pulp <strong>and</strong>/or Paper Mills in the Upper <strong>Fraser</strong> River Basin
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