Complex Site Assessment and Remediation
Review/Classification of Investigation and Remediation Costs Claim in Environmental Cost Recovery Disputes
Cost Allocation Between Time Periods, Parties, and/or Sources of Contamination
B.S., Hydrogeology - San Diego State University
Michael Marsden is a Principal Hydrogeologist in Roux’s Oakland, California office and has more than 30 years of experience investigating, remediating, and providing technical support to major corporations, attorneys, insurers, private land owners, regulators, and others. He has served as a consulting and testifying expert and technical resource for complex projects and cases. Mr. Marsden’s diverse experience covers environmental pollutants such as solvents, petroleum hydrocarbons, lead, arsenic, chromium, manufactured gas plant (MGP) wastes, and pesticides in soil, groundwater, and sediment. Mr. Marsden has conducted complex hydrogeologic investigations at a number of active and former military installations and industrial sites across California. He has experience evaluating aquifer tests; conducting tidal studies; assessing the effects of saltwater intrusion on groundwater systems; evaluating surface water and groundwater interaction; and identifying contaminant sources. He has also worked over the years on numerous litigation cases. For the past several years, Mr. Marsden has worked with many of the major insurance companies such as AIG, CNA, Resolute, Hartford, Great American, Chubb, and the London market evaluating environmental claims at sites across the country. He works with both carriers and counsel to evaluate various aspects of environmental claims including sources and timing of contaminant releases, incurred and future cost, and cost allocation.
General Super Plating Company v PKG Equipment, Inc. (2010), State of New York, Onondaga County, Expert Report, testified at trial.
American International Specialty Lines Insurance Company v. Chubb Custom Insurance Company (2011), Superior Court of the State of California, County of Los Angeles, Declaration, Deposition, case settled.
Block v. Helix and Huddleston v. Haber (2012), Expert report, deposition, case settled.
Embee, Inc. fka Embee Plating v. Safeco Insurance Company of America, et al., Orange County Superior Court, Expert report, deposition, case pending.
Gardner Family, LLC, et al. v. Crimson Resource Management Corp. (2017), United States District Court, Eastern District of California, Expert report, deposition, case settled.