In Situ Groundwater Remediation with Permeable Reactive Barriers

Deborah Schnell


In-situ permeable reactive barriers (PRBs) are replacing pump and treat remedies for contaminated groundwater with life cycle cost savings greater than 75%. The current number of installed PRBs (>200) reflects the maturity and continued acceptance of the ZVI technology and benefits of passive in-situ remediation. PRB technology is now considered a well-established and proven long term solution to groundwater remediation and is acknowledged by many experts and regulatory agencies to be a preferred remedy.

Azimuth-oriented vertical hydraulic fracturing — or vertical inclusion propagation (VIP) - is an alternate mode of constructing ZVI-PRBs in-situ, allowing reactive barriers to be installed continuously to greater depths than conventional technologies with minimal waste. GeoSierra Environmental has used the VIP technology to install PRBs at numerous sites with geologies ranging from silts to clays, glacial tills to highly permeable sands and gravels with depths ranging from 15 feet to more than 120 feet.

Join nationally recognized PRB and fracturing expert, Deborah Schnell, P.E., for an in-depth look on how this innovative passive remediation system treats a wide range of contaminants and the advantages of orientated VIP placed ZVI-PRBs (aka as Trenchless PRBs). Find out why so many environmental professionals are turning to the ZVI-PRB technology using the VIP method. Benefits include:

  • Green and sustainable technology
  • Destruction of a wide variety of volatile organic compounds (VOCs) to non-toxic end products, with chemistry and kinetics well understood
  • Minimal impact on natural groundwater flow regime
  • Trenchless construction – no excavation and minimal site disturbance
  • Demonstrated long term performance with expected life of >30 years

About the presenter

Deborah Schnell, P.E., Senior Project Manager

Deborah Schnell is a senior project manager at GeoSierra Environmental / Panther Technologies. She holds a BS in Civil Engineering from both Lafayette College, and the New Jersey Institute of Technology. Deborah has over 20 years in the environmental industry and was a former consultant at McLaren/Hart, and was former owner of Pneumatic Fracturing, Inc.

Date and Time

June 19, 2018
10:00 AM PDT / 1:00 PM EDT