Confidential Auto Wrecking Facility

Client: Confidential

Year: 2024 - 2025

Location: Columbia Slough, Oregon

Features:

  • Groundwater investigation to assess potential contaminant discharge

  • Upland stormwater source control evaluation

  • Surface soil contamination removal and slope reconfiguration

  • Regulatory permitting and compliance oversight

  • Installation of security fencing and replanting of restored slope

Project Summary

Central Engineering Services (CES) was retained to coordinate site investigation and cleanup actions under regulatory oversight to obtain a No Further Action Letter and settle liabilities associated with sediment contamination adjacent to the site. The project focused on evaluating groundwater impacts, addressing potential contaminant discharge, and implementing site remediation measures to restore environmental integrity while ensuring compliance with local and federal regulations.

Scope of Work: CES conducted a sitewide groundwater investigation to evaluate potential impacts and contaminant discharge into the Columbia Slough. The work included upland stormwater source control evaluations, localized contaminated soil removal, slope stabilization, and ecological restoration. Permitting efforts were led by CES, working with regulatory bodies such as the US Army Corps of Engineers, Department of State Lands, and the City of Portland. CES also prepared work plans and comprehensive reports for regulatory closure.

Key Activities:

  • Conducted extensive groundwater sampling and analysis to determine contaminant levels and migration pathways

  • Evaluated and implemented stormwater source control measures to prevent further contamination

  • Excavated impacted soil and debris from the slope area, improving structural stability and environmental safety

  • Coordinated all permitting activities, including obtaining approvals for bank restoration and site remediation

  • Provided ongoing consultation and reporting to ensure compliance with regulatory agency requirements

Results: CES’s expertise and proactive approach facilitated a comprehensive environmental solution for the auto-wrecking facility. Their longstanding relationships with regulatory agencies and strategic planning resulted in positive project outcomes, ensuring regulatory compliance and environmental protection. CES’s efforts led to a stabilized slope, improved site conditions, and progress toward obtaining a No Further Action Letter.