TagThird Runway(1098)

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 is a technical laboratory reference table listing method detection limits (MDLs), practical quantitation levels (PQLs), and published water quality values for a wide range of chemical compounds in various water matrices, including wastewater, groundwater, and drinking water. It compares laboratory PQL ranges against Method B groundwater and surface water standards for chemicals such as acenaphthene, acrolein, aldrin, arsenic, benzene, and PCB compounds. The table is used to assess whether analytical detection capabilities meet regulatory thresholds for water quality monitoring purposes.

This technical document describes the background water chemistry and modeling assumptions used to estimate how metals move through soil and groundwater at contaminated sites. It outlines key simplifications in the MINTEQ geochemical model, including the assumption of chemical equilibrium and the exclusion of redox potential, and presents soil-sorption values (Kd) for various metals such as arsenic, chromium, and cadmium that vary with soil pH. The results show that metal mobility is most strongly influenced by pH levels in the subsurface environment.

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.

Pre-filed testimony of Sally Nelson, Burien City Council member and former Mayor, submitted on behalf of appellant Airport Communities Coalition (ACC) in PCHB No. 01-160, ACC & CASE v. Dept. of Ecology & Port Of Seattle. Testimony introduces ACC — an interlocal agreement entity comprising Cities of Burien, Des Moines, Federal Way, Normandy Park, Tukwila,

This 2002 staff report from the City of SeaTac and City of Des Moines addresses an appeal by King County Water District #54 challenging an environmental (SEPA) determination related to the Des Moines Creek Basin Restoration Projects, a multi-agency effort to reduce stormwater damage and protect water quality near the Tyee Golf Course. The water district argued that the environmental review failed to adequately address potential impacts to the Highline aquifer, which serves as its sole water supply source. The hearing was scheduled before a Hearing Examiner on October 10, 2002.

Port Of Seattle application filed in King County Superior Court (Case No. 02-2-25658-9SEA) before Judge Bruce Hilyer, seeking direct review by Washington Court of Appeals Division One of the Pollution Control Hearings Board (PCHB) August 12, 2002 Order affirming Ecology’s 401 Certification (Clean Water Act 33 U.S.C. § 1341) for the Sea-Tac Airport Master Plan

ACC (Airport Communities Coalition, composed of Cities of Burien, Des Moines, Federal Way, Normandy Park, Tukwila, and Highline School District) and CASE (Citizens Against Sea-Tac Expansion) petition for judicial review filed in Thurston County Superior Court under Administrative Procedure Act Chapter 34.05 RCW. Challenges PCHB No. 01-160 final Order of August 12, 2002 (finalized September

Port Of Seattle petition for judicial review filed in King County Superior Court (case no. 02-2-25658-9SEA) under RCW 34.05 (Administrative Procedure Act), challenging the August 12, 2002 final order of the Pollution Control Hearings Board (PCHB Case No. 01-160) regarding the 401 Certification issued by Washington Department of Ecology on September 21, 2001 for the