TagACC(1534)

Administrative Record placeholder page AR 027880 indicating the exhibit referenced at this location in the record was still being copied and would be supplied later. No substantive content is present. Filed as EXH0766027880.

Placeholder page for exhibit AR027876 indicating the document was still being copied and would be supplied later. No substantive content is present. Administrative record reference AR027876.

Administrative Record placeholder page AR027875 indicating an exhibit that was still being copied and would be supplied later. No substantive content is present; this is a document production status notice from legal or administrative proceedings, likely related to Sea-Tac Airport or Port of Seattle administrative record.

Placeholder page for exhibit AR027766 indicating the document was still being copied and would be supplied later. No substantive content is present. Administrative record reference AR027766.

Placeholder page for exhibit AR027765 indicating the document was still being copied and would be supplied later. No substantive content is present. Administrative record exhibit placeholder associated with AR number 027765.

Administrative Record AR027679–AR027681 comprising a multi-page tabular listing of water rights records in King County (WRIA Code 9), spanning priority dates from 1930 to 1958. Records identify control numbers, business/person names, type/status (CE, PE/CAN, AP/REJ, CE/RLQ), priority dates, acreage, quantities (Qi), purposes (IR, DS, MU, ST, FR, PO, DM), and water sources including Green River,

Placeholder page for exhibit AR 026983, indicating the document was still being copied and would be supplied later. No substantive content is present. Administrative record reference AR 026983.

This document outlines a Water Quality Assessment (WQA) conducted in support of the Port of Seattle's Master Plan Update for Seattle-Tacoma International Airport (STIA), focused on evaluating the airport's ability to meet water quality requirements under its NPDES permit following construction of a proposed third runway. The assessment uses three approaches: a Water Effect Ratio (WER) study to adjust water quality standards for site-specific conditions, a mixing zone analysis to determine where standards must be met in receiving streams, and an examination of variability in stormwater quality. The goal is to reach agreement with the Washington Department of Ecology on whether aquatic life in nearby receiving streams will be adequately protected.

This research study examines how heavy metals in highway stormwater runoff behave as water flows off pavement, finding that most heavy metals remain dissolved rather than attaching to solid particles due to low alkalinity and short travel times on the pavement surface. The study, conducted on Interstate 75 in Cincinnati over two years, explores how best management practices like detention basins or infiltration trenches could be used to capture these metals before they reach receiving waters.

Reference list compiled by Peter Willing, Ph.D., of documents relied upon in testimony regarding the 401 Water Quality Certification for the Third Runway at Sea-Tac Airport. Sources cited include studies on highway runoff chemistry, heavy metals partitioning, urban stormwater BMPs, treatment wetlands, NPDES permits, and Port of Seattle annual stormwater monitoring reports (1998–2001). Key references