TagMTCA(87)

A periodic review by the Washington State Department of Ecology’s Toxics Cleanup Program of post-cleanup site conditions at the Continental Airlines Hydrant Fuel System located at SeaTac International Airport, Concourse C and North Satellite. The review evaluates whether cleanup actions conducted under the Model Toxics Control Act (MTCA) are protecting human health and the environment,

Exhibit AR033807, WAC 173-340-747 soil concentration calculations for ground water and surface water protection under the Model Toxics Control Act (MTCA), SeaTac Third Runway Embankment Project. Tables derive cleanup levels for hazardous substances including antimony, arsenic, beryllium, cadmium, chromium +3, chromium +6, copper, mercury, nickel, selenium, silver, thallium, zinc, and lead using Equations 747-1 and

Resume of John J. Strunk, Associate Geologist at Associated Earth Sciences, Inc. (AESI), Bainbridge Island, WA. Over sixteen years of experience in environmental and ground water industry. Projects include Area-Wide Ground Water Study at Seattle-Tacoma International Airport (Sea-Tac Airport) under MTCA Agreed Order between Ecology and Port Of Seattle; Third Runway project support regarding ground

This document outlines the Port of Seattle's soil fill quality criteria for the first phase of construction of a new runway embankment, involving approximately 820,000 cubic yards of material placed in 1998. It details the approved sources for fill material, technical specifications for soil gradation and contamination standards, and the certification and monitoring processes required of contractors. Independent soil technicians and Port consultants were tasked with overseeing material delivery, placement, and compliance testing throughout the project.

This document presents three-phase back calculations for soil contamination levels at a site, listing various chemical constituents including heavy metals (arsenic, cadmium, chromium, lead, mercury, zinc) and petroleum products (TPH, gasoline, heavy oils). The table compares cleanup criteria from multiple regulatory frameworks including ambient water quality criteria (AWQC), drinking water standards, Model Toxics Control Act (MTCA) methods, and Fish and Wildlife Service ecological screening levels. The calculations were used to evaluate soil remediation thresholds based on leaching potential and ecological risk, with source references including EPA and MTCA SSL tables dated August 2001.

The Port of Seattle filed a petition in August 2002 asking the Pollution Control Hearings Board to reconsider Condition 8 of its Final Order, which prohibited the use of a soil-testing method called SPLP (Synthetic Precipitation Leaching Procedure) to approve fill material for the Third Runway expansion project at Sea-Tac Airport. The Port argued that banning SPLP made it nearly impossible to find acceptable fill soil, since up to 78% of naturally occurring, uncontaminated soils would fail the Board's strict numeric criteria when tested across multiple constituents. The Port maintained that proper use of SPLP poses no environmental threat to water quality and requested the Board allow its use under specific conditions so the runway project could proceed.

This legal declaration by Dr. Patrick Lucia, filed in a Washington State Pollution Control Hearings Board case, argues that the Department of Ecology lacks reasonable assurance that fill material used to construct the Sea-Tac Airport Third Runway embankment meets environmental safety standards. Dr. Lucia contends that the certification allows soil concentrations of arsenic and other metals — including cadmium, chromium, lead, mercury, and nickel — that significantly exceed Puget Sound natural background levels. He also criticizes the Port of Seattle's soil sampling approach as arbitrary and unscientific, asserting it fails to meet accepted environmental engineering standards for contaminant testing.