Select Page


JJ&A engineers and scientists have successfully designed and implemented site characterization and remediation strategies at sites throughout the western United States. We have broad experience in developing and applying characterization and remedial approaches for sites with a wide range of contaminants including: metals, chlorinated volatile organic compounds (CVOCs), petroleum compounds, polynuclear aromatic hydrocarbons (PAHs), pesticides/herbicides, polychlorinated biphenyls (PCBs) and salts. Our strong technical knowledge of both traditional and innovative remedial technologies and knowledge of federal and state regulations allows us to develop successful environmental solutions.

We support our clients in cost effectively achieving regulatory compliance by forming goal driven project teams, based on the regulatory framework applicable to the project and the site specific technical challenges. We develop technical and regulatory team consensus by using conceptual site models to identify data gaps and develop technical strategies within the context of the project’s regulatory framework. Our focus on understanding site conditions within the regulatory framework simplifies the data collection phases for characterization and feasibility studies.

JJ&A’s site characterization philosophy reflects a weight of evidence approach and is considerate of the triad process. Field programs are designed with an emphasis on real-time data collection and agency approved logic based decision frameworks. We have used this method successfully to minimize costs and schedule impacts and to develop technically sound data to support risk evaluations and remedial technology evaluation and selection.

We have experience with characterizing environmental settings and the nature and extent of impacts, including expertise in surface water, ground water, soil, sediment and air sampling and analysis techniques. Our characterization services address the various aspects of site characterization, including:

  •  ecological settings, including sensitive habitats and species;
  • hydrogeologic settings;
  •  background conditions;
  •  nature and extent of contamination including delineation of source and attenuation zones;
  •  soil vapor/indoor air conditions;
  •  contaminant fate and transport processes including contaminant migration and natural attenuation; and
  •  groundwater age dating (CFCs, SF6).

JJ&A’s remediation focus is on sustainable options integrated with the project’s environmental setting. As such, our focus is on evaluating options for in situ remedies that meet future land use goals, provide a beneficial reuse of the site and minimize environmental impacts during remedy implementation. This approach is grounded within our regulatory framework based style and JJ&A has demonstrated success at effectively facilitating remedy implementation with the regulatory agencies and local communities. Our staff has experience with the following sustainable remedial technologies which are most frequently applied as one aspect of an integrated remediation approach:

  •  In situ and ex situ soil stabilization;
  • Ex situ soil bioremediation with on-site or off-site reuse;
  • In situ soil and groundwater treatment including oxidants and reductants;
  • In situ groundwater enhanced natural bioremediation;
  • In situ soil vapor extraction;
  • In situ dual phase extraction;
  • Monitored natural attenuation for both organic (chlorinates) and inorganic compounds (heavy metals and salts) in groundwater;


  • Monitored natural recovery for organic and inorganic compounds in sediments.