Wednesday, September 30, 2020

Soil / Groundwater Remediation

Converse has an understanding of local regulatory environments and community concerns. This enables us to develop innovative investigation and remediation approaches, and an ability to apply specific risk-based remediation goals to your project, not just regulatory standards. The integration of all of these capabilities is essential to reach a successful project conclusion.

Converse develops cost-effective solutions for assessing and remediating soil, groundwater or air by approaching your issues as if they were our own. Our objective is to determine what your remediation goals are then apply the remedial solutions that meet your time frame and technical needs. Our knowledge of the advantages of remedial technologies, combined with both our strong reputation with the local regulators and our ability to apply risk based techniques, make us uniquely qualified to succeed.

Phase II Assessments

Phase II Site Assessments can vary depending on the site conditions. A Phase II can consist of surface samples to assess the levels of potential contamination to installing numerous groundwater monitoring wells and soil borings to define the extent of impacts. We utilize a variety of investigative techniques to complete Phase II work, such as surface sampling, geoprobe sampling, drill rig sampling, geophysical surveys, ground penetrating radar (GPR) and soil gas/ soil vapor sampling.

As with our Phase I ESAs, Converse's Phase II Assessments are generally completed in accordance with the standard practices of the ASTM Standard Practice for Envinromental Assesssments: Phase II Environmental Site Assessment Process. (ASTM E1903-11). The purpose of completing the assessment in accordance with ASTM E1903-11 is to acquire and evaluate the information sufficient to achieve the objectives by the client and Converse.

Groundwater Sampling

There are several techniques for groundwater sampling; the most common industry practice is conventional purge and sample. In addition to this method, we are familiar with low flow purging and sampling (for low production wells or to reduce the amount of purge water and disposal) and using passive diffusion samplers which eliminate purge water and resulting disposal costs.


Every site has unique conditions that may alter the remediation strategy. Remediation activities are dependent on the type and quantity of contamination as well as regulations clean up goals.

Remedial activities can include the installation of vapor extraction systems to leaving the impacted materials in place and covering with a cap material.

Converse offers experienced professionals to complete the remedial activities beginning with the generation of a workplan, to overseeing the field activities and confirmation sampling, to the final generation of a close-out or completion report.

Risk Assessment

We provide health-based risk assessments to enable us to provide a more realistic solution for achieving site closure. Each state has unique requirements for accepting health-based risk assessments, but there are also national standards. Converse has risk assessors that are familiar with developing site specific target levels for your site and who are able to apply those standards so the regulatory agency can utilize them.

Underground Storage Tanks and Above Ground Storage Tanks

We have provided remediation at hundreds of UST and AST sites for releases of hydrocarbons and other chemicals. We also provide tank removal oversight as is required by most local agencies during the removal of USTs.