Mr. Dalton has over 40 years of environmental and groundwater consulting experience and is a founding partner at Dalton, Olmsted & Fuglevand, Inc. His expertise spans environmental assessment and remediation, groundwater development and management, and groundwater control for civil engineering projects in Washington, Oregon, Missouri, California, Montana, and Alaska.

A significant portion of his work over the past 15 years has involved assessing upland sources of contamination to marine waters, including work in the Thea Foss and Hylebos Waterways of Commencement Bay in Tacoma, Washington.

Mr. Dalton has a proven ability to integrate his extensive knowledge of environmental regulations with the management and technical issues associated with his client’s projects. He has worked on sites regulated by MTCA and Sediment Management Standards (SMS), RCRA, CERCLA, SARA, CWA, TSCA, and SDWA, and by state/federal cleanup, hazardous waste, water quality, and landfill regulations. He has had extensive involvement overseeing the characterization and remedial design for the Head of Thea Foss Waterway problem area within the Commencement Bay Nearshore/Tideflats Superfund site.

Technical Specialties

  • Expert testimony
  • RI/FS & RD/RA (Superfund MTCA)
  • Recontamination studies
  • Site characterization and monitoring
  • Contaminant source identification
  • Groundwater control (construction)
  • Development of conceptual models
  • Remediation of soil, groundwater, and sediment


  • M.S. Geology (Hydrogeology/Geochemistry), University of South Florida
  • B.A. Geology, Colorado College


  • Registered Geologist/Hydrogeologist, State of Washington


Matthew G. Dalton, Cyanide Pollution of Groundwater, paper presented to the Washington State Health Association, Wenatchee, Washington, 1982

Matthew G. Dalton, Acquisition and Interpretation of Water Level Data, Chapter 9 in Practical Handbook of Ground-Water Monitoring – 2nd Edition, Ed. D.M. Nielsen, Lewis Pub., Chelsea, Michigan., 2005

Paul F. Fuglevand; Matthew G. Dalton; Ruel Harder, Preventing Leaks from Concrete Underground Storage Tanks, Proceedings of Conference on Petroleum Hydrocarbons and Organic Chemicals in Groundwater, NWWA/API, October 31, 1990

Matthew G. Dalton; G.L. Hartman; B.W. Wallace, Impermeable ‘Hard Cap’ Evaluation, Thea Foss Waterway, Tacoma, Washington, Proceedings of the Battelle Conference – Remediation of Contaminated Sediments, January 2006

Matthew G. Dalton, Recontamination of Waterway Cap, Thea Foss Waterway, Tacoma, Washington, Proceedings of the World Dredging Congress XVIII, Orlando, Florida., May 27 to June 1, 2007

Speaking Engagements

“Recovery of Petroleum Product within a Complex Hydrogeologic Environment”, presented at the Petroleum Hydrocarbons and Organic Chemicals in Groundwater: Prevention, Detection, Restoration Conference, Houston, Texas, November 5-7, 1984

“Defining, Containing, and Removing the Problem - Characterization to Remediation”, Underground Storage Tank Management Seminar, Seattle., 1985

“Hydraulic Conductivity Testing - Can We Believe the at Data”, ASTM Conference on Groundwater Monitoring Standards, Tampa, Florida., 1987

“Hazardous Waste and Real Estate”, presented to the Northwest Real Estate Symposium, sponsored by the Washington State Bar Association and the Northwest Real Estate Institute, Seattle, WA., 1989

“Overview of Ground Water Flow, Transport and Modeling”, presented at the Eight Annual Hazardous Waste Law and Management Conference, Seattle, Washington., December 10-12, 1991

“Superfund for the Technical Person”, Environmental Regulation Course for Federal Facilities and Government Contractors, Seattle, WA., July 1991

“How to Structure a Real Estate Transaction to Address Contamination Using a Hypothetical Transaction, 1994, with Ralph Palumbo and Clark Davis”, Law Seminars International, Seattle, WA., March 1994

“Fate and Transport”, Seminar on What You Need to Know About Environmental Science to Make Good Legal, Financial and Business Decisions, Law Seminars International, Seattle Washington., April 1994

“Investigating the Environmental Condition of Property and Resolving Environmental Concerns”, The Development and Construction Process Seminar Sponsored by The Washington State Bar Association, Seattle, WA, September 1996

“Improved Ground Water Sampling Procedure and Data Interpretation for Low Solubility/Mobility Contaminants”, Presentation to the 2nd Symposium on the Hydrogeology of Washington State, Olympia, Washington, August 26, 1997