EXH1004034957

PCHBPollution Control Hearings Board of the State of Washington

z- 1999 Airfield Project Soil Fill Acceptance Criterle The Port of Seattle will have a continuing need to acquire fill material for use in STIA airfield projects. In 1999, the Port will acquire geotechnically and environmentally suitable materials by either contract (purchase) or by other arrangement for acceptance of surplus material. Material delivered to the airport will be derived from the following sources: • Commercial borrowpits that are "state certified" ** • Contractor/supplier-certified construction sites • Port-owned property ** The Washington State Department of Transportation (WDOT) tests material from borrow pits for vadous geotechnical qualities, either for its own purposes or upon request. Borrow pits that are found to have geotechnically suitable material by the WDOT testing are said to be "state certified" and are identified by WDOT pit numbers. The WDOT testing does not include testing for contaminants. The Washington Department of Ecology has requested, in conjunction with the 401 Water Quality certificationprocess, a description of the criteria and review process for acceptance of fillmaterial. The fill acceptance criteria and review process to be used in 1999 are described below. Criteria Generally, geotechnical suitability depends on the specific project and fill placement location, and will be established on a use-specific basis. Generally, environmentallysuitable materiels are those that meet MTCA Method A contaminant levels. However, in the event the Port determines that specific material that does not satisfyMTCA Method A contaminant levels is nonetheless appropriate for placement in a specific project location, where such placement is environmentally responsible and meets…
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