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| Title | Vanalco Aluminum (Vancouver) Class II Inspection January 10-12, 1994. | |||
| Month-Year Published | October 1994 | |||
| Online Availability |
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| Short Description |
An unannounced Class II Inspection was conducted on January 10-12, 1994, at the Vancouver Aluminum Company (Vanalco) aluminum smelter in Vancouver, Washington. The inspection investigated the Vanalco sanitary sewage trickling filter plant (SSTP) and the facility's industrial wastewater system. SSTP operation was adequate and removal efficiency for most parameters was good. (Also see abstract below) | |||
| Publication Number | 94-159 | |||
| Author(s) | Hoyle-Dodson, G. | |||
| Print Availability | ||||
| Number of pages | 58 pp. | |||
| Keywords | aluminum, bioassay, cyanide, effluent, groundwater, identification , industrial, Inspection, NPDES, site investigation, smelter, toxic, toxicity, waste, water, water quality | |||
| Subject Waterbodies |
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| Abstract | Long Description |
An unannounced Class II Inspection was conducted on January 10-12, 1994, at the Vancouver Aluminum Company (Vanalco) aluminum smelter in Vancouver, Washington. The inspection investigated the Vanalco sanitary sewage trickling filter plant (SSTP) and the facility's industrial wastewater system. SSTP operation was adequate and removal efficiency for most parameters was good. Possible surges of fluoride into the industrial wastewater settling lagoon are noted. SSTP influent and effluent concentrations were all within NPDES permit limits. Industrial wastewater effluent results were generally less than NPDES permit limits with the possible exception of cyanide. Organic and metal concentrations in SSTP and industrial wastewater effluent were within state and EPA water quality criteria. Bioassays found no toxicity in SSTP samples, but Ceriodaphnia dubia and Selenastrum capricornutum exhibited toxicity in the industrial wastewater effluent. Identification of the source of Selenastrum capricornutum toxicity is recommended. SSTP sludge had a higher than expected concentration of fluoride, possibly from contaminated groundwater. Caution is recommended in the final disposal of this waste. |
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