Andrew Barnes, P.G.

Andrew Barnes is a Principal Hydrogeologist based in California with more than 20 years of environmental consulting experience focused on remedial investigations, feasibility studies, groundwater remediation system conceptual design, hydrostratigraphic characterizations, landfill gas migration control, and the characterization and remediation of non-aqueous phase liquids (NAPLs) in groundwater.

He specializes in managing complex multi-disciplinary remediation projects involving multiple stakeholders. As a project manager for multi-PRP groups, he is adept at developing technical and regulatory strategies for soil and groundwater investigations, environmental impact assessments, closures for waste management units, public participation, and design and installation of groundwater/soil remediation systems. His clients include commercial and industrial interests and regulated governmental agencies throughout the southwestern U.S.

Routinely working with clients in the petroleum refining, petrochemical manufacturing, waste management, and land redevelopment sectors, Andrew has extensive experience in remedial assessment and remedial design for environmentally-impacted sites. He also leads feasibility studies, hydrogeologic studies under RCRA and CERCLA, and geostatistical studies and modeling. He has extensive experience in development of regulatory permitting and compliance strategies, assessment of NAPL origins, characterization and remediation of sites with soil and groundwater impacts, and post-closure maintenance of groundwater and landfill gas systems.

As the project manager for remedial design/remedial action and post-closure activities for the Operating Industries, Inc. (OII) Landfill Superfund site, Andrew worked with multiple potentially responsible party representatives and regulatory oversight by two federal agencies and three state/regional agencies.

He was also project manager and principal hydrogeologist for one of the largest brownfield redevelopment projects in California, where chlorinated dense NAPL (DNAPL) contributed to vadose zone and groundwater impacts. This project involved subsurface groundwater and DNAPL characterization, assessment of soil gas, sub-slab gas, and indoor air, and development of engineering controls and remedial approaches that allowed mixed use commercial and residential reuse of the site. For the Del Amo Superfund site, Andrew's groundwater flow and contaminant transport model was recognized by U.S. EPA's Kerr Laboratory as one of the most comprehensive regional models developed under their review.

Contact Andrew Barnes at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-714-969-0800.

Career Summary: Andrew Barnes, P.G.

  • Education: B.A., Geology, University of California, Santa Barbara, 1987
  • Practice Areas: Geotechnical and Geoenvironmental Engineering
  • Disciplines: Hydrogeology
  • Specialties: Geoenvironmental Site Investigation and Remediation; Groundwater Assessment and Remediation; Specialized In Situ Treatment Technologies
  • Registration: Professional Geologist, California, 7511
Geosyntec Consultants
Geosyntec is a specialized consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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