Gary E. Hokkanen

Gary E. Hokkanen

Principal Hydrogeologist

Oakland, California Office

  • MS Hydrogeology and BS Civil Engineering
  • 38 years experience
Direct: (510) 879-6803
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Gary has more than 39 years of experience in the investigation, remediation, and litigation support of contaminated properties.  As a testifying expert, he has developed expert opinions relating to a wide variety of sites, including wood-treatment plants, dry cleaner facilities, landfills, manufacturing facilities, fuel-transfer facilities, oilfields, and disposal sites. Contaminants present at these sites have included chlorinated solvents, hydrocarbons, polycyclic aromatic hydrocarbons, PFAS (PFOA, PFOS), TCP, MTBE, pentachlorophenol, volatile organic compounds (VOCs), methyl tertiary- butyl ether, pesticides, and metals. The expert opinions provided by Gary have involved cost allocation, remediation evaluation, standard of care, fate and transport of contaminants in groundwater, and contaminant source identification. He has also been retained as an NCP Compliance Expert.

Clients and Industries

  • Real Estate/Financial
  • Developers/Construction
  • Insurance
  • Legal/Litigation

Proficiencies and Experience

  • Site Characterization
  • Stormwater
  • Insurance Claims
  • Expert Testimony
  • Landfill

Fun Facts

Gary keeps busy with his large extended family, and enjoys golf, camping, skiing, and skating.  He enjoys cheering on his son and daughter at baseball and softball tournaments.  Although he lives in California, Gary follows numerous Minnesota sports teams, including the Twins, Vikings, and University of Minnesota hockey, basketball, and football teams. He has become a fan of the Warriors, A’s, and Giants, however.


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