Seattle Metal Scrap Yard

Water treatment system at a scrap metal facility in Seattle

Project Information

This system was designed for a 16-acre scrap metal transportation, storage and sorting facility on the Duwamish River in Seattle.

Several years after installation, the facility began transitioning from a general industrial stormwater permit to an individual permit. The treatment system was upgraded with triplex adsorptive multi-media vessels in 2017 in anticipation of the new permit.

A small-scale pilot treatment system was installed and operated during the 2019-2020 wet season. The pilot system demonstrated that the addition of co-precipitation and adsorptive media blend to the existing system can achieve all proposed low-level individual permit parameters.

Project Details

  • Location: Seattle, WA
  • Technology: CESF
  • Flow Rate: 500 GPM
  • Constituents: Turbidity, pH, TSS, Cu, Pb, Zn, Hydrocarbons, PCBs
  • Operational: September 2012 – current date
  • Gallons Treated to Date: 50,817,928 Gallons
  • $/Gallon to Date:  $ 0.0128
Triplex adsorptive multi-media filter vessels
Triplex adsorptive multi-media filter vessels

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