Notes
Declaration by Edward O’Brien, a Department of Ecology Water Quality Program employee with 22 years of experience, submitted to the Pollution Control Hearings Board in the case of Airport Communities Coalition v. State of Washington Department of Ecology and Port of Seattle. The declaration explains O’Brien’s familiarity with stormwater management manuals including the 1992 Stormwater Management Manual for Puget Sound, the 1999 Draft Manual, and the 1998 King County Surface Water Design Manual. It describes how development and impervious surfaces alter the natural hydrologic cycle, increasing peak flows and pollutant levels while reducing groundwater recharge and summer base flows.
