NPDES Permit Major Modification Comments for Sea-Tac Airport

Notes

A letter from Water Resources Consulting L.L.C. submitted on behalf of the Airport Communities Coalition to the Washington State Department of Ecology, commenting on the proposed draft NPDES permit no. WA-002465-1 for SeaTac Airport. The letter argues that the draft permit offers a ‘blank check’ approval of future discharges at unknown locations and that reporting requirements must be revised to require hardness data necessary to interpret dissolved metals concentrations. The author also alleges that the Port of Seattle’s Annual Stormwater Monitoring Reports manipulate hardness data to obscure water quality violations.

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