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Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

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(ENKON Envir<strong>on</strong>mental Ltd. 2001). C<strong>on</strong>sidering the quantities used, the highest prioritywood preservati<strong>on</strong> and anti-sapstain chemicals in the study area include:• Creosote;• Chromated copper arsenate (CCA);• Amm<strong>on</strong>iacal copper zinc arsenate (ACZA);• Pentachlorophenol (PCP);• Didecyldimethyl amm<strong>on</strong>ium chloride (DDAC); and,• 3-iodo-2-propynyl butyl carbamate (IPBC).3.1.1.4 Cement and C<strong>on</strong>crete PlantsAccording to Envir<strong>on</strong>ment Canada (1998), there were two major cement plants operatingin the lower mainland in 1993, including the Lafarge Canada Inc. (located in Richm<strong>on</strong>d)and Tilbury Cement Ltd. (located in Delta; Figure 3.4). These plants are permitted to3discharge up to 6,100 and 18,200 m /d <str<strong>on</strong>g>of</str<strong>on</strong>g> effluent to the <strong>Fraser</strong> <strong>River</strong>, respectively.However, there are numerous other cement and c<strong>on</strong>crete plants located throughout thestudy area, including <strong>on</strong>e in the South Thomps<strong>on</strong> <strong>River</strong> Area <str<strong>on</strong>g>of</str<strong>on</strong>g> Interest and 14 others inthe lower <strong>Fraser</strong> <strong>River</strong> Area <str<strong>on</strong>g>of</str<strong>on</strong>g> Interest. Collectively, these other cement and c<strong>on</strong>crete3plants are permitted to discharge up to 775 m /d <str<strong>on</strong>g>of</str<strong>on</strong>g> effluent to the <strong>Fraser</strong> <strong>River</strong> or itstributaries (Table 3.5).The informati<strong>on</strong> needed to fully characterize the effluents associated with cement andc<strong>on</strong>crete plants was not located in the literature. However, Envir<strong>on</strong>ment Canada (1998)reported that cement plant effluents typically c<strong>on</strong>tain elevated levels <str<strong>on</strong>g>of</str<strong>on</strong>g> TSS and metals(arsenic, copper, lead, and zinc). Informati<strong>on</strong> from other sources indicate that sucheffluents may also c<strong>on</strong>tain potassium, sodium hydroxide, chlorides, sulphates, calciumcarb<strong>on</strong>ate, aluminum, and chromium ( EEAA 2005). Effluent discharges from these plantsalso tend to have elevated levels <str<strong>on</strong>g>of</str<strong>on</strong>g> pH, which can influence the toxicity <str<strong>on</strong>g>of</str<strong>on</strong>g> amm<strong>on</strong>ia t<str<strong>on</strong>g>of</str<strong>on</strong>g>reshwater fish and other aquatic organisms (USEPA 2009b). The effluent dischargepermits that have been established for the facilities in the <strong>Fraser</strong> <strong>River</strong> Basin includem<strong>on</strong>itoring requirements for effluent. The variables identified in these permits include oiland grease, TSS, pH, BOD, and/or toxicity. Therefore, the c<strong>on</strong>taminants <str<strong>on</strong>g>of</str<strong>on</strong>g> greatestinterest with respect to effluent discharges from cement plants include:• C<strong>on</strong>venti<strong>on</strong>al variables (i.e., pH, BOD, and TSS);18

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