EXH 237: Email Chain Rozeboom to Fitzpatrick — Response Status July 31 Comments STIA 3rd Lagoon Expansion

This document contains a September 2000 email exchange regarding the proposed expansion of Lagoon #3 in the Sea-Tac Airport Industrial Wastewater System (IWS), in which consultant Bill Rozeboom follows up on unresolved comments submitted to the Washington State Department of Ecology. The attached July 31, 2000 comments raise concerns about discrepancies in the lagoon's design capacity, the risk of frequent overflow into Des Moines Creek, and potential wildlife hazards near aircraft movement areas that may violate FAA guidelines. Additional issues flagged include incomplete construction plans, unaddressed lagoon deficiencies, and the apparent overlap of the lagoon expansion project with 3rd runway construction activities affecting nearby wetlands.

Notes

Exhibit 237 (AR 018960–018962). Email chain dated September 6, 2000 from Bill Rozeboom (NHC-SEA) to Kevin Fitzpatrick (Washington Dept of Ecology, Industrial Permit Unit, NWRO), cc: Chung K. Yee, John Glynn, Jonathan R. Freedman (U.S. Army Corps of Engineers), following up on July 31, 2000 initial comments on the Sea-Tac International Airport Industrial Wastewater System (IWS) Lagoon #3 Expansion Project. Attached July 31 comments raise issues including: discrepancy between 72 MG design capacity and 47 MG recommended in 1998 Kennedy/Jenks Addendum; release rates of 2–4 MGD; overflow risks into Des Moines Creek; FAA Advisory Circular 150/5200-33 (5/1/97) wildlife attractant guidelines and the 10,000-foot siting incompatibility standard for wastewater treatment facilities within 2,000 feet of the runway; missing floating lagoon cover; construction plan sheets C-31 through C-34 marked NIC for 3rd runway embankment; and stockpile area overlapping Wetlands W1, W2, W16, W17, W18, W19. NPDES permit, SEPA, stormwater management plan, and Master Plan Update Improvements context. Work Order No. C-100888, Project No. STIA-0009-T-1.

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