TagMTCA(87)

A Port of Seattle memo from April 2001 summarizes environmental testing of rock aggregate imported from the Black River Quarry for use in the Third Runway embankment project. Testing by environmental consultant AMEC found petroleum hydrocarbons (TPH) and elevated copper levels in some samples, prompting operational changes at the quarry including equipment cleaning and discarding the first hundred tons of rock after asphalt recycling operations. Follow-up testing confirmed that contaminant levels fell below MTCA Method A cleanup standards, and the Port halted material imports from the quarry in mid-October 2000 pending resolution.

Port Of Seattle internal memo dated 04/30/01 from Beth Clark to Paul Agid (cc: Elizabeth Leavitt, Jim Thomson) regarding rock aggregate imported from the Black River Quarry (King County, Washington), owned by Stoneway Rock & Recycling, used in the Third Runway embankment during August–October 2000. Documents AMEC and City Transfer Inc. (CTI) chemical testing for

Email chain dated March 12, 2001 from Steve Alexander (ECY/Ecology) to Ann Kenny and Raymond Hellwig, forwarding draft meeting notes from a March 9, 2001 management meeting between the Department of Ecology and the Port Of Seattle regarding the 401 Certification process for Sea-Tac Airport Third Runway. Alexander clarifies that TCP (Toxics Cleanup Program) committed

A March 9, 2001 letter from law firm Helsell Fetterman, representing the Airport Communities Coalition (cities of Burien, Des Moines, Federal Way, Normandy Park, Tukwila, and the Highline School District), demands that Washington State Department of Ecology enforce a 1999 Agreed Order requiring the Port of Seattle to complete groundwater contamination studies at Sea-Tac Airport. The coalition argues that the Port has failed to finish required groundwater flow and contaminant transport studies — originally due December 1999 — and that Ecology cannot legally certify the third runway project under the Clean Water Act without this data. The letter also requests a State Auditor review of how the Port spent grant money provided by Ecology to fund those studies.

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

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.

Exhibit AR017360, Part IX Tables from MTCA Cleanup Regulation WAC 173-340-900, dated February 12, 2001. Contains Table 720-1, Method A Cleanup Levels for Ground Water, listing hazardous substances including arsenic, benzene, benzo(a)pyrene, cadmium, chromium, DDT, 1,2-dichloroethane (EDC), ethylbenzene, ethylene dibromide (EDB), lead, lindane, methylene chloride, mercury, MTBE, naphthalenes, PCB mixtures, radium 226, tetrachloroethylene, toluene, trichloroethylene,

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.

A December 7, 2000 letter from the Port of Seattle to the Washington Department of Ecology responds to questions raised at a November 16, 2000 meeting regarding the Seattle-Tacoma International Airport Ground Water Study conducted under Agreed Order #97TC-122. The letter addresses the completion status of various research tasks, including hydrogeological surveys, contamination site identification, groundwater flow modeling, and pollution prevention for underground storage tank systems. The Port agrees with some of Ecology's assessments of incomplete tasks while disputing others, and clarifies its position on the scope of work required under the agreement.

Email chain (AR 017786-017788, DOE S-13:01 0884-0886) forwarded by Joan Marchioro (ATG) to Raymond Hellwig on November 22, 2000, originating from Peter Kmet to Chung K. Yee on September 11, 2000, marked not for production as deliberative. Discusses proposed new Method A soil cleanup levels under MTCA (Model Toxics Control Act), WAC 173-340-708(b), with attached