Herrera’s civil and environmental engineers are experienced in construction management and field inspection services related to hazardous materials contamination and water quality issues encountered during construction. Onsite specialists provide technical advice related to identification and delineation of contamination, recommendations for preventing or reducing worker exposure, application of regulations pertaining to toxic chemicals and conventional parameters, and issues associated with air, noise, wetlands, and wildlife issues. Our engineering services include the following:

QA sampling and testing

Performance monitoring documentation

Field design

Review of submittals and shop drawings

Change order preparation

Preparation and verification of progress payment

Contract modifications

Conflict resolution

Key Projects

• Hazmat and Water Quality Monitoring Support for Sound Transit Link Light Rail Construction - Sound Transit, Seattle, Washington
• Construction Management for Southwest Harbor Remediation Area 3 Landfill Closure - Port of Seattle, Seattle, Washington
• Hazmat and Water Quality Oversight Support for Southeast Interceptor Sewer Line Construction - King County, Department of Natural Resources, Wastewater Treatment Division, Renton, Washington
• Construction Monitoring for South 180th Street Grade Separation - City of Tukwila, Washington
• Lead Paint Construction Monitoring for North Queen Anne Bridge Seismic Upgrade - Seattle Department of Transportation
• Construction Oversight for Abatement of PCB-Amended Paint, Juneau Federal Building - General Services Administration, Juneau, Alaska