TagWater Quality(478)

Exhibit AR032547 from Washington State Department of Ecology (Ecology), Volume V – Runoff Treatment BMPs, August 2001. Covers phosphorus removal treatment trains (Table 3.1), Enhanced Treatment Menu (Section 3.4) and Basic Treatment Menu (Section 3.5) for stormwater management. Specifies requirements for industrial, commercial, multi-family project sites, arterials and highways discharging to fish-bearing streams or lakes.

Draft Water Quality Certification #1996-4-02325, pages 16-17 of 23, dated August 2001, issued by Washington State Department of Ecology regarding Port Of Seattle Seattle-Tacoma International Airport (STIA). Covers operational stormwater requirements including the approved Comprehensive Stormwater Management Plan (CSMP) Volumes 1-4 December 2000 as revised July 2001, retrofitting of stormwater management facilities, discharge of operational

Letter dated July 31, 2001 from Keith R. Smith, Water Resources Manager at Port Of Seattle, to Ms. Ann E. Kenny at the Washington State Department of Ecology Northwest Regional Office (Bellevue, WA 98008-5452), transmitting conceptual drawings for the proposed Flow Impact Offset Facility at Seattle-Tacoma International Airport. Drawings relate to reserved stormwater release storage,

Handwritten notes dated 7/31/01 from Kelly Whiting discuss water quality treatment options for a downstream area, referencing NEPL and CARBO systems with treatment rates of 40% and 10% respectively. The notes cover spill containment and oil management considerations, including gravity oil-water separators and spill containment vaults upstream. A follow-up note from 7/31/01 indicates water quality issues will have comments, with discussion of impact numbers from a 7/23 report.

This July 2001 draft document outlines clean fill criteria for the Port of Seattle's Third Runway construction project at Sea-Tac Airport, requiring the Port to submit environmental assessment documentation to the Washington Department of Ecology before placing any fill material. It specifies that fill may only come from state-certified borrow pits, contractor-certified construction sites, or Port-owned properties, while prohibiting the use of any contaminated or remediated soils. The document details testing and sampling requirements, including review of contamination records and analysis of hazardous substances, to ensure that no toxic materials are introduced into wetlands or state waters during construction.

Deliberative, do-not-disclose email from Ann Kenny (Washington State Department of Ecology) dated July 29, 2001, transmitting a preliminary draft 401 Water Quality Certification (WQC) for the Port of Seattle Third Runway construction at Seattle-Tacoma International Airport (STIA) in the Miller, Walker, and Des Moines Creek watersheds. The draft WQC references JARPA application dated October 25,

Email from Ann Kenny (Washington State Department of Ecology, Northwest Regional Office) dated July 29, 2001, transmitting a preliminary draft 401 Water Quality Certification (WQC) for the Port of Seattle Third Runway construction at Seattle-Tacoma International Airport (STIA). Recipients include Raymond Hellwig, Kevin Fitzpatrick, John Drabek, Ching-Pi Wang, Erik Stockdale, Joan Marchioro (ATG), Tom Young

Email from Ann Kenny (Ecology) dated July 29, 2001, to the 401 WQC team — including Raymond Hellwig, Kevin Fitzpatrick, John Drabek, Ching-Pi Wang, Erik Stockdale, Joan Marchioro (ATG), Tom Young (ATG), Katie Walter, and Kelly Whiting, cc Jeannie Summerhays — transmitting a preliminary deliberative draft 401 Water Quality Certification (WQC) for the Third Runway