Notes
Email from Bill Rozeboom of Northwest Hydraulic Consultants to Peter J. Eglick and Kevin L. Stock, dated December 20, 2000, summarizing excerpts from prior NHC comment letters on Industrial Wastewater System (IWS) issues related to the SeaTac Third Lagoon Expansion and Sea-Tac Airport Master Plan Update (MPU). Covers KCSWDM Core Requirement 1 (discharge at natural location), basin area diversions of 45.7 acres to IWS, HSPF modeling deficiencies, IWS hydraulic capacity between 10- and 25-year storm events, 254–320 acre IWS service areas, detention storage discrepancy (92.0 vs. 76.6 acre-feet), impacts on Walker Creek and Des Moines Creek seepage and base flows, lagoon lining (Lagoons 1, 2, 3) and groundwater recharge loss, AESI hydrogeologic study June 2000, Kennedy/Jenks April 1998 IWS Engineering Report Addendum, continuous simulation modeling deficiencies, and FAA Hazardous Wildlife Attractants conflicts. Exhibit No. 242, AR 019003–019005.