webinar recording

Cost-Effective Remediation through Enhanced Characterization

Estimated Reading Time: < 1 minute

In this webinar we are pleased to have a special guest presentation by Richard Desrosiers, Associate Principal and Hydrogeologist at GZA GeoEnvironmental, Inc. In this presentation he discusses cost-effective remediation through enhanced characterization.

An in situ remediation case study is presented to demonstrate how enhanced characterization techniques were used to not only define existing conditions but also to define the upper and lower boundaries of two 4,000-foot plumes. A detailed understanding of subsurface conditions, including the factors influencing migration and natural attenuation, allowed the development of a source zone mass reduction remedial design, followed by a monitored natural attenuation approach for the downgradient portions of the plumes, rather than active remediation of the entire plume.

Stoichiometric doses of PersulfOx (chlorinated plume) and a solution of lactic acid and 3DMe (hexavalent chromium plume) were injected within delineated zones of low and moderate hydraulic conductivity in those high mass zones to effectively reduce contaminant mass. Injection point spacing, and dosing were based on the calculated effective zone of influence of the additive, whereas, treatment barriers were based upon field pilot studies to determine the longevity of the additive and seepage velocities. Current data shows significant plume concentration/mass reductions within the two plumes.

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EU Webinar: From site investigation to sign off – A holistic approach to addressing petroleum hydrocarbon contamination

Estimated Reading Time: < 1 minute

Using the case study of the redevelopment of a former petrol filling station, Gareth Leonard (Managing Director of Regenesis Ltd) and guest speaker Simon Ware (Managing Director of UK based environmental consultancy, WDE), discuss the process of devising, optimising and delivering the remedial solution for sites impacted with petroleum hydrocarbons. Discussion is made on the importance of integrating the activities of consultant and potential solutions provider. The intention of the presentation is to share experience of the successful investigation, remediation and validation of sites impacted with petroleum hydrocarbons and will be of interest to contaminated land practitioners, regulators and problem holders.

The presentation covers:

  • Important site investigation parameters for both understanding the site and allowing the creation of an accurate and efficient remedial design
  • Remediation drivers and targets
  • The value of early discussions and gap analysis by environmental consultant and solutions provider
  • The choice and explanation of different remedial techniques, what they can achieve and how they can be used together to improve treatment efficiency
  • Exemplified by the investigation, remediation and closure of a recent site, with other case study references used for illustrative purposes

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Jack Sheldon: A Tale of Two ISCO Chemistries

Estimated Reading Time: < 1 minute

First broadcast: January 31, 2017

Speakers: Jack Sheldon, Senior Remediation Specialist at Antea Group

In this webinar we’re pleased to have Mr. Jack Sheldon, nationally recognized remediation expert and Senior Remediation Specialist at Antea Group®. Mr. Sheldon’s expertise spans over 34 years of remediation experience and sites in all 50 states and around the world.

His presentation focuses on a case study of a petroleum hydrocarbon impacted site where a sequence of in situ remediation technologies from REGENESIS were applied to address multiple phases of the contamination. The project remediation process, from planning to full implementation, are discussed.

Recording now available