Successful monitoring programs frequently require data collection under inclement conditions and during non-business hours. At Herrera, data integrity comes first and staff members are committed to producing high-quality field results. Our stormwater monitoring team is highly responsive and mobile; staff members in Portland, Seattle, and Bellingham successfully monitor stormwater conditions throughout western Oregon and Washington. Our hazardous materials monitoring team mobilizes throughout the Pacific Northwest, assessing long-term changes in ground water contaminants at sites that are undergoing cleanup.

Herrera uses the latest monitoring technologies, including low-flow sampling, automated samplers, data sondes, multiparameter meters, underwater diver surveys and videography, and telemetered hydrologic and water quality monitoring equipment. Our monitoring programs also include inventories of plankton, benthic macroinvertebrates, aquatic macrophytes, riparian vegetation, large woody debris, and sediment contamination and transport.

Our interdisciplinary approach to large projects applies a broad range of scientific applications to environmental monitoring that sets the company apart as regional monitoring experts.

Key Projects

• Stormwater Monitoring for National Pollution Discharge Elimination System: Permit Compliance and Best Management Practices Performance Evaluation of Compost-Amended Filter Strips – Washington State Department of Transportation
• Stormwater and Hazmat Quality Monitoring of Link Light Rail Construction Site – Sound Transit, Seattle, Washington
• Water Quality Studies for Issaquah Highlands Master Plan Development – Port Blakely Communities, Inc., Washington
• Drinking Water Testing Program – Seattle Public Schools
• Engineering and Monitoring Services for Green Lake Water Quality Improvements and Alum Treatment – Seattle Parks and Recreation
• Walsh Lake Aquatic Plant Survey and Milfoil Control Project – Seattle Public Utilities
• Twin Lakes Water Quality and Aquatic Plant Assessment – Twin Lakes Home Owners Association, Federal Way, Washington
• Multiple ground water monitoring projects for petroleum and dry-cleaning chemicals at shopping malls in Washington – Various private clients
• Assessment and Long-Term Monitoring Study for Federal Building Motor Pool Ground Water Treatment System in Fairbanks, Alaska – U.S. General Services Administration, Region 10
• Long-Term Monitoring for Maintenance Shop Petroleum Cleanup – City of Sumner, Washington