WSDOT I-5/Mercer to SR 520

The I-5/Mercer to SR 520 project is permitted with Department of Ecology under an Administrative Order with contaminants of heavy metals and hydrocarbons. Encore provides weekly water quality lab sampling, CESCL inspections and water treatment at 2 separate locations within the project. The water treatment consists of treating for heavy metals in stormwater and ground water using Chitosan Enhanced Sand Filtration in conjunction with activated carbon and organo clay media.

Location

Seattle, WA

partner

Walsh Construction Co II

timeline

December 2021 to Present