Zero Valent Iron Remediation Design with Reactivity and Demand Models (click here for recording)


Presented by Patrick Randall P.E.

Date:     February 26, 2020 (Wednesday)
Time:     1:30pm Eastern Standard Time

The use of Zero Valent Iron (ZVI) for remediation of chlorinated solvents is becoming more prevalent especially in large scale brownfield remediation projects.  Pat will present in detail the process of designing an effective reactive barrier using ZVI.  He will include 1) data requirements, 2) reactive modeling calculations, 3) longevity estimating due to ZVI consumption by geochemical demands, and 4) overview of barrier construction methods, such as injection, excavation/backfill, continuous trenching, and soil mixing.  Using these methods, Pat has been able to guide several projects from the design phase to the final construction.


Mr. Randall’s career started as a regulator working on chemical toxin evaluation projects for the State of California.  He then turned to the design of remedial systems for treatment of chemical hazards and finally into the world of in-situ soil and groundwater remediation.

He has designed and implemented many projects for treatment of chlorinated solvents and petroleum hydrocarbons using aerobic/anerobic biological treatment, chemical oxidation, and reduction technologies.

Mr. Randall now works with engineering firms to identify, design and implement the most effective in-situ remedial systems for their clients.