Complete 2018 webinar schedule coming soon, please sign up for our e-mail list for notifications. To view our previous webinars, visit our Remediation Webinar Recordings page. 


Combined Remedies Webinar Series

Achieving remediation site closures can be challenging, time-consuming, and costly. Treatment train approaches or combined remedies are often a practical means to address difficult remediation sites. The optimal approach to soil and groundwater clean-up often requires the use of multiple technologies either sequentially or concurrently to achieve the most cost-effective approach throughout the entire life cycle of cleanup at a project site.

Carus is excited to announce our upcoming webinar series, Combined Remedies. We are fortunate to bring to you five industry experts presenting on various combined remedy topics throughout the upcoming months. Join us for one, two, or all of our 30-minute webinars. 


Combined Remedies Series

Combining Remedial Technologies and Implementation Methods to Address Chlorinated Solvent Impacts at Complex Sites

June 14, 2018
12-12:30 pm CDT

Mike Mazzarese, AST Environmental Inc. 

Complex sites require complex solutions.  Challenges typically include heterogeneous geology and contaminant mass distribution, vadose and/or saturated contaminant mass, and concentrations that span several orders of magnitude.  These require us as practitioners to often consider multiple remedial technologies and approaches to reach the site specific goals within the desired timeframes.  Often technologies are inefficiently implemented sequentially; this extends the remediation timeframe and requires re-characterization between remedial phases.  This presentation will highlight several projects where multiple technologies were successfully implemented in concert.  The strategies for each site included different approaches for source and plume remediation.

Site #1: An industrial property utilized chlorinated solvents for equipment maintenance from the 1950’s to 1970’s. Past operations resulted in multiple source areas and it is suspected that chlorinated solvents were discharged to drain pipes into a former settling pond. TCE concentrations have been detected in groundwater at a maximum concentration of 730 mg/L and in soils up to 6,800 ug/g.  Soil blending was performed utilizing chemical oxidation (sodium permanganate) to treat the unsaturated TCE impacts exceeding an average 1,100 ug/g.  BOS 100® was injected into the saturated zone in a barrier configuration to limit the mass flux from the source area and prevent contamination from leaving the subject property.

Site #3: A buried drum of TCE was discovered during site redevelopment.  In situ chemical oxidation via potassium permanganate was used to successfully treat the source area.  Downgradient of the source a permeable reactive barrier was installed via direct push injection in order to decrease the mass flux of the plume encroaching into a wetlands.  Data will be presented from the source remediation as well as from the monitoring wells up and downgradient of the barrier.

Mike has been involved with in-situ remediation for seventeen years having worked within the reagent, field services, and environmental consulting community his entire professional career.  His role as Senior Engineer at AST involves project assessment and design, field implementation oversight, and post project data analysis.  Mike is a graduate of Penn State University holding BS and MS degrees in Environmental Engineering.  He has previously worked for Vironex, Regenesis, and URS.