Project Details

A local asphalt batch plant is dependent on barge deliveries of aggregate and therefore must operate along a sensitive waterway in western Washington State. Clear Creek worked with the facility operator and their consultant to evaluate the existing site conditions and options for upgrading existing stormwater controls. Clear Creek then conducted bench-scale treatability analysis to confirm the effectiveness of the recommended stormwater treatment approach prior to implementation.

The chitosan enhanced sand filtration system was integrated into the existing stormwater drainage system to limit the costs associated with the retrofit. The facility personnel worked directly with Clear Creek staff to provide onsite welding, electrical connections and equipment placement. After system installation, Clear Creek trained the facility staff and continues to provide ongoing support services.

Services Provided

  • Permitting Support
  • Water Treatment System Design
  • Treatment System Fabrication & Installation
  • System Maintenance & Monitoring

Technology Provided

  • Chitosan Enhanced Sand Filtration
  • 100 gallons-per-minute
  • System Automation & SCADA Capabilities

Project Statistics

1.5 - Acre Site

Discharge to Marine Waters

Commissioned in 2015


Turbidity, TSS, Cu, Zn

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