Projects range in scale from Superfund sites to drainage basins and watersheds. Our services related to contaminant source tracking include study planning, investigation, design, and remediation for upland soils, surface water sediment, surface water, stormwater runoff, and ground water. Source tracking studies for chemical contaminants involve an evaluation of sources associated with current and historical operations, as well as an evaluation of redistribution and recontamination of sediments. We have designed microbial source tracking studies using genetic fingerprinting technologies for local governments, focusing on public health issues, the development of best management practices, and the development of total maximum daily loads for fecal coliform bacteria, as required by the Clean Water Act.

Key Projects

• Diagonal Avenue South Drainage Basin Stormwater Pollutant Source Investigation - Seattle Public Utilities
• Norfolk Basin Water Quality Investigation - Seattle Public Utilities
• Commercial Business Discharge Source Control Inspections – Seattle Public Utilities
• City of Seattle Facilities Source Control Inspections - Seattle Public Utilities
• Eagle Harbor Operations, Maintenance, and Monitoring, Bainbridge Island, Washington - Washington State Department of Transportation
• Microbial Source Tracking Study for Thornton Creek and Matthews Beach - Seattle Public Utilities
• Willapa River Microbial Source Tracking Study, Pacific County, Washington - Pacific County Department of Community Development
• Drayton Harbor Watershed Fecal Coliform Bacteria Contamination Source Investigation - City of Blaine, Washington