Notes
Letter dated March 12, 2001 from Peter Willing, Ph.D. of Water Resources Consulting L.L.C. to Chung Yee, Washington State Department of Ecology, submitted on behalf of the Airport Communities Coalition (ACC) regarding proposed draft NPDES permit no. WA-002465-1 for Sea-Tac Airport. Raises two objections: (1) the draft permit offers a blank-check approval of future discharges at unknown locations into unspecified receiving waters, depriving the State and citizens of oversight; (2) reporting requirements must be revised to include hardness data concurrent with metals samples on Discharge Monitoring Reports (DMRs), citing WAC 173-201A-040. Criticizes the Annual Stormwater Monitoring Report for July 1999–June 2000 for using a median hardness value of 56 mg/l versus a prior median of 14 mg/l, obscuring violations of copper and lead chronic toxicity standards by up to 9x and 7x respectively. Requests that the modified permit, Monitoring Requirements section S2.A, Stormwater, be amended to add hardness reporting by EDTA method or calcium/magnesium calculation. AR 023562–023563.