Notes
Letter dated August 21, 2000 from Columbia Biological Assessments (Richland, WA) to Tom Luster, “401” Permit Coordinator, Washington Department of Ecology, filed as AR 021341–021343, Exhibit 368. Prepared at the request of Airport Communities Coalition (ACC), assessing the Port Of Seattle’s declared intent to use City of Seattle drinking water to augment summer low flows in Miller Creek and Des Moines Creek when flows fall below 1.0 cfs. Author concludes drinking water should not be used due to toxicity of free chlorine (residuals 0.5–1.5 mg/L at tap vs. WAC 173-201A-030 acute criterion of 19 ug/L and chronic criterion of 11 ug/L), chlorination by-products including trihalomethanes (chloroform), bromoform, and chloramines, and fluoride. Cites LC50 data for daphnia (27.6 ug/L), rainbow trout (61.92 ug/L), and cutthroat trout (85.46 ug/L). References Parkhurst et al. 1996, USEPA 1994 Water Quality Standards, Holland et al. 1960, Merkens 1958, Arthur and Eaton 1971, Hidaka and Tatsukawa 1995. PCHB third-runway-eis administrative record.