As lead consultant, M&A has supported an in-situ bioremediation system to treat perchlorate since 2008. Our role has now grown to oversee remedy expansion and optimization and to develop a new regional groundwater model.

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[fusion_tagline_box shadow="no" shadowopacity="0.7" border="1" highlightposition="left" content_alignment="left" linktarget="_self" buttoncolor="default" animation_direction="left" animation_speed="0.3" hide_on_mobile="small-visibility,medium-visibility,large-visibility"]Effective long-term strategic direction and management support for a groundwater resource protection remedy[/fusion_tagline_box]


The regional plume associated with this site threatens numerous public water supply wells. The contaminants of concern include perchlorate and VOCs, primarily trichloroethene (TCE). Boeing currently maintains two pump-and-treat systems operating at about 3,000 gpm.


Strategy-level services include project planning, cost forecasting, and cost management. We also serve as the technical liaison to large stakeholder group and manage or conduct a range of analyses to ensure remedy effectiveness and regulatory compliance.

Groundwater Remediation

  • Managed remedial investigation, well drilling and design, data analysis, and reporting
  • Completed a site-wide feasibility study (FS) and remedial action plan (RAP) for the lead regulatory agencies (Department of Toxic Substances Control and Regional Water Quality Control Board)
  • Completed interim RAPs for individual operable units
  • Conducted remedial investigations to characterize hydrogeologic conditions and the distribution of contaminants at the site
  • Managed and directed expansion of the remedy and monitoring network to increase capture and optimize operations
  • Provided technical oversight for the design and construction of extraction wells and monitor wells
  • Directed the successful completion of an in situ biotreatment remedy for perchlorate in a primary source area
  • Developed comprehensive database of groundwater level and water quality data from over 600 wells nested within 200 boreholes
  • Prepared multiple Five-Year Review reports

Groundwater Modeling

  • Developed and calibrated a multi-layer, transient, flow-and-transport model using MODFLOW, MT3D, and MODPATH to manage and evaluate remedial wellfield effectiveness and contaminant plume capture
  • Conducted vadose zone modeling to assess source areas

3D Geologic Modeling

  • Constructed a new model for managing and optimizing the long-term groundwater remedy that will incorporate a 3D Leapfrog model and hydrogeologic data from more than 3,000 wells

Permitting & Compliance

  • Managed a compliance monitoring and reporting program
  • Obtained waste-discharge permits for the source control remedy and ensured permit compliance