TagEcology(797)

This Washington State regulation (WAC 173-340-747) establishes methods for determining safe soil contamination levels that protect groundwater quality at cleanup sites. It outlines several scientific approaches, including three-phase and four-phase partitioning models, leaching tests, and empirical demonstrations, to calculate the maximum allowable concentration of hazardous substances in soil before they risk contaminating groundwater. The regulation requires that soil concentrations not cause groundwater cleanup level exceedances and not result in the buildup of nonaqueous phase liquids in or on groundwater.

WAC 173-340-740 from the Model Toxics Control Act (MTCA) Cleanup Regulation, published February 12, 2001, establishing unrestricted land use soil cleanup standards. Covers Method A, Method B (standard and modified), and petroleum mixture cleanup levels including Equations 740-1 through 740-3 for noncarcinogens and carcinogens. Specifies default exposure parameters: soil ingestion rate 200 mg/day, average body

Email dated February 8, 2001 from Ann Kenny (Ecology Senior Environmental Specialist) to Andrea Grad, Peter Eglick, and Kevin Stock responding to PDA requests regarding Chapter 173-175 WAC Dam Safety review of Port Of Seattle Third Runway stormwater facilities. Covers ISW Lagoon #3, 25.5 acre-foot pond (SDW1A), 37.91 acre-foot pond (SDW1B), MSE wall Dam Safety

In February 2001, a Washington State Department of Ecology site manager requested an audit of a Port of Seattle grant (Grant No. G0000052) tied to Agreed Order #97T-N122, citing concerns about potential duplicate funding where costs could be covered by both the grant and cost recovery from other parties. The grant, worth up to $861,000 (split 50/50 between state and local funds), was issued to support a Phase 1 groundwater study at Seattle-Tacoma International Airport (Sea-Tac), investigating contamination from jet fuel and petroleum products released from underground storage tanks and fuel distribution systems. The study aimed to model groundwater flow and assess risks to nearby public drinking water wells and surface water bodies.

Exhibit 2059 (AR 031711–031713, ECY00010776–10778). Email from Gus Ordonez to Ann Kenny dated February 7, 2001, transmitting a memorandum from Jerald LaVassar, M.S., P.E. to Tom Luster reviewing the report ‘Evaluation of Retaining Wall/Slope Alternatives to Reduce Impacts to Miller Creek, Embankment Station 174+00 to 186+00’ for the Third Runway project at Sea-Tac International Airport.

This Washington State Department of Ecology publication, authored by Stewart M. Lombard and Cliff J. Kirchmer and released in February 2001, provides guidelines for preparing Quality Assurance Project Plans (QAPPs) for environmental studies. It outlines standards and procedures to ensure that data collected during environmental investigations meets defined quality and reliability requirements.

These are prepared talking points for Washington State Department of Ecology officials attending public meetings on January 26-27, 2001, regarding the proposed Third Runway (3RW) at Seattle-Tacoma International Airport. The notes address 17 anticipated public questions covering topics such as Ecology's 401 Water Quality Certification review process, the use of Port-funded consultants, SEPA compliance, wetlands impacts, and whether the project was receiving special political consideration. Officials emphasized that no approval would be granted until the project demonstrated full compliance with all applicable environmental laws and regulations.

Letter dated January 25, 2001 from Peter M. Douglass, P.E. (Technical Review Board Facilitator) to U.S. Army Corps of Engineers (Jonathan Freedman, Project Manager) and Washington State Department of Ecology (Ann Kenny, Environmental Specialist) summarizing findings of an independent expert panel convened by Port Of Seattle to review embankment fill and mechanically stabilized earth (MSE)

A January 2001 letter and accompanying meeting notes document communications between the Port of Seattle and the Washington Department of Ecology regarding a groundwater contamination study at Seattle-Tacoma International Airport, conducted under the Model Toxics Control Act (MTCA) Agreed Order 97TC-N112. The records outline the scope of the study, which focuses on hydrogeologic investigation and a review of the Fuel Operations Area, and clarify that any necessary cleanup would be handled separately after the study's completion. Both parties discussed concerns about scope expansion and the process for addressing contaminated sites identified through the study.

In a January 2001 letter to Washington State Senator Julia Patterson, outgoing Department of Ecology official Tom Luster summarizes the key water quality issues surrounding the proposed Sea-Tac Airport expansion review under Section 401 of the federal Clean Water Act. The assessment outlines concerns including stormwater management, wetland impacts, streamflow, and whether the project's discharges would meet state water quality standards for antidegradation, beneficial uses, and numeric water quality criteria. Luster notes the views are his own and may not fully reflect Ecology's current position, directing the Senator to contact Ann Kenny at Ecology's Northwest Regional Office for the latest information.