3/14/19 AEG Dinner Meeting - Hartford Basin

  • 14 Mar 2019
  • 6:00 PM - 10:00 PM
  • 60 Cottontail Lane, Somerset, NJ 08873


  • Payment is accepted at the door via cash, check, or credit card. $35 for AEG members / $45 for non-members / $5 for students.

Registration is closed


Mesozoic Rift Basin Talk Series - Talk #3
Case Study from the Hartford Basin, CT
Thursday, March 14, 2019
At the Clarion Hotel in Somerset, New Jersey

Presented by
Michael J. Gefell, PG, CPG - Anchor QEA, LLC

Kent and Olsen (2008)

Time: Social Hour 6:00 pm – 6:45 pm    /    Dinner 6:45 pm – 7:45 pm      
Presentation begins at 8:00 pm
Place: Clarion Hotel     /     60 Cottontail Lane, Somerset, NJ 08873     /     (732) 560-9880
RSVP: End of Business, Wednesday, February 13, 2019.  A timely RSVP is appreciated!

 Please note, you can register more than one individual at a time!
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Cost: $35 for AEG members     /     $45 non-members     /     $5 for students with RSVP 
 Non-members always welcome!  Pay at the door by check, cash, or credit card. 
Make check payable to AEG.
CECs: One professional development hour (pdh) for continuing education credit (CEC) will be awarded for attending the presentation. 
SRPLB Approval for One Technical CEC will be applied for.


This meeting is sponsored by

This event, the third in a four-part series of AEG Mesozoic rift basin talks, features the Hartford Basin of Connecticut.  

The Solvent’s Recovery Service of New England, Inc. (SRSNE) Superfund Site is situated in the Hartford Basin, in Southington, Connecticut. The site is in a regional, structural rift basin with tilted bedrock strata, and the bedrock consists of the Upper Triassic New Haven Arkose “red beds”.  Bedrock fractures dip moderately to the east-southeast, parallel to bedding.  Steeply dipping fractures, however, have also been observed in outcrops near the site, and in core samples and downhole fracture-logging results within the study area.  While normal faults have been mapped approximately 2.5 miles west and 2.0 miles east of the site, no bedrock faults have been reported within the study area. Bedrock investigations at the site included: outcrop fracture orientation measurements, rock coring and logging, downhole (in-situ) fracture orientation measurements, laboratory core sample analysis and hydraulic aperture calculations. The environmental characterization of this former solvent processing facility used site-specific bedrock fracture data, 3-D visualization, groundwater flow modeling, and solute-transport modeling to delineate the plume of VOCs associated with a multi-component DNAPL deep in the fractured bedrock.  DNAPL was encountered in bedrock fractures 200 feet below an adjacent river.  Down-dip projection along those fractures, combined with site topography and property access constraints, indicated that drilling locations further down dip would require drilling 400 to 500 feet to empirically delineate the DNAPL and the associated dissolved phase plume.  In lieu of expensive drilling, site data were used to show that fractures close with depth.  Three-dimensional MODFLOW modeling was used to depict groundwater flow directions, and solute-transport (CRAFLUSH) modeling indicated that the plume length in the bedrock is negligible due to de minimis fracture apertures below a depth of 300 feet.  Modeling results for shallower flow paths were used to select two feasible monitoring locations where shallower wells were installed to complete the plume delineation.

Michael Gefell, PG, CPG is a principal scientist at Anchor QEA, LLC, in Lakewood, Colorado. Mike began his career in environmental site assessment and remediation in 1989. His primary areas of interest include quantitative hydrogeology, fractured bedrock, NAPL assessment, groundwater/surface water interaction, innovative site characterization methods, modeling, and remedial design. His current project responsibilities include hydrogeology and fate-and-transport assessment for sites involving fractured bedrock and groundwater/surface water interactions. Before joining Anchor QEA, Mike worked for 25 years at BBL and then ARCADIS US, where he served as the site investigations discipline leader and innovation director. Mike has participated on the LNAPL and Fractured Rock teams for the ITRC. Since 1994, he has served as the lead hydrogeologist for the SRSNE Superfund Site, which was presented as a case study in the ITRC’s guidance document Characterization and Remediation of Fractured Rock. Mike is the Technology Spotlight Editor and an associate editor of Groundwater journal and received the 2013 Technology Award from the National Ground Water Association. He earned a bachelor’s degree in geological sciences from Cornell University in 1986 and a master’s degree in geology from the University of California, Davis, in 1989. Mike is a licensed Professional Geologist in the states of Georgia, New York, North Carolina, and Pennsylvania.


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