Contaminant Investigation

Effective strategies for characterizing subsurface contamination


M&A has decades of experience characterizing subsurface contamination at federal and state-led Superfund sites and mines, as well as at other sites where groundwater has been impacted by industrial or naturally occurring, regulated constituents. We have experience working with contaminants such as arsenic and chromium, industrial solvents, PFCs, 1,4-dioxane, fuel hydrocarbons, coal combustion residuals, metals, and perchlorate, among others. One of our areas of specialization is developing models to project contaminant behavior in complex hydrogeologic environments. Our work has supported successful negotiations between potentially responsible parties and regulatory agencies.


  • Characterizing the occurrence and nature of contaminants
  • Characterizing vadose zone and aquifer conditions
  • Identifying and evaluating impacts from contaminant source areas
  • Sampling groundwater, soil vapor, and/or soil in accordance with regulatory protocols
  • Assessing vapor intrusion risks
  • Using groundwater flow and transport models to project contaminant migration, attenuation, and cleanup over time in soils and groundwater
  • Preparing plans (monitoring, quality assurance, and health and safety) and reports (preliminary investigation, site characterization, and remedial investigation) to meet regulatory requirements