NGWA Conference on Groundwater in Fractured Rock and Sediments
8:00 a.m.-5:00 p.m.
8:00 a.m.-8:05 a.m.
8:05 a.m.-9:00 a.m.
Assessing the ability of an unconfined bedrock aquifer to transmit infiltrating water and contaminants vertically downwards has long been a difficulty for practicing hydrogeologists. Typically, the conduits for flow are vertical fractures or joints that may intersect the ground surface or subcrop beneath a thin veneer of glacial material or soil. Although this setting is widely recognized to pose a risk to the quality of water in the aquifer, we actually know very little about the fluid and transport processes across the bedrock surface.In this talk, the results of studies conducted recently at two field sites, one set in sedimentary rock and the other in a gneissic terrain, will be presented. The studies include the development of pumping and pulse interference methods for estimation of vertical K, the completion of tracer experiments from a surficial source to depth in a pumped well for the estimation of transport porosity, and the interpretation of unique infiltration experiments conducted adjacent to a small outcrop across the interface between the soil and bedrock. The results point out the significant importance of vertical fracture geometry, spacing and aperture in determining bulk vertical hydraulic conductivity and vertical transport porosity, and the difficulty we have in estimating these properties. The role of the materials covering the bedrock is also significant and even a thin veneer of soil can substantially impede rapid fluid and contaminant migration.
9:00 a.m.-9:15 a.m.
9:15 a.m.-11:55 a.m.
Investigation of Alternative Groundwater Sampling Systems for Use in Fractured Rock Aquifers
Philip T. Harte
Real-Time Assessment of VOCs in Fractured Bedrock Using Innovative Core Discrete Fracture Network (DFN) Techniques
Seth E Pitkin
Uranium Occurrence and Arsenic Variability in Private Well Water in Southeast New Hampshire
Delineation of Trichloroethene and Related Contaminants in Weathered and Unweathered Sedimentary Rock, NAWC, New Jersey
Daniel J. Goode
Influence of Fracture Fabric and Gradients on Contaminant Migration at the Savage Well Superfund Site
Andrew Fuller, PG
Stringfellow Superfund Site – Characterization, Remediation, and Modeling of Groundwater Impacts
James M. Finegan, PhD, PG, CHg
Developing a Remedy for a Large Complex Chlorinated Solvents Plume in a Fractured Rock Environment
John N. Dougherty, PG
11:55 a.m.-1:10 p.m.
1:10 p.m.-2:50 p.m.
Advances in Remediation of Fractured Bedrock Using In Situ Thermal Treatment Technologies
Kevin Leahy, PhD, C.Geol
Characterization and Modeling Approach for Matrix Diffusion and Remedial Alternatives Evaluation in Fractured Sedimentary Rock
Steven W. Chapman, M.Sc., P.Eng.
2:50 p.m.-3:05 p.m.
3:05 p.m.-4:45 p.m.
Remediation of Fractured Bedrock Containing Light Non-Aqueous Phase Liquid (LNAPL)
Sean R. Carter, PE
Role of Geologic Faults on Contaminant Plume Morphology and Implications for Remediation
David S. Lipson, Ph.D., PG
Changes in Groundwater Biogeochemistry Caused by Bioaugmentation Remediation in a Fractured Sedimentary Rock Aquifer
Thomas E. Imbrigiotta
4:45 p.m.-6:00 p.m.
8:00 a.m.-4:30 p.m.
8:00 a.m.-9:15 a.m.
This panel discussion will address three issues: 1) what is the state of the art in groundwater remediation in fractured rock? 2) how can we measure the effectiveness of remediation of mass in the rock matrix?, and 3) what issues need to be addressed to improve groundwater remediation in fractured rock? The panel will be chaired by Ryan Wymore, PE from CDM Smith and will include an Eva Davis, USEPA expert in thermal remediation technology, Michael Smith, regulator from the Vermont DEC, Dr. Beth Parker, researcher on groundwater contamination in fractured rock from the University of Guelph, and Chuck Trione, Corporate Remediation Project Lead at Lockheed Martin Corp.
9:15 a.m.-9:30 a.m.
9:30 a.m.-10:50 a.m.
Coliform Bacteria in Bedrock Groundwater: Insights from the NJ Private Well Testing Act Database
Thomas Atherholt, Ph.D.
DNAPL or Dissolution? Mercury Transport to Riverbed Fractures at a Former Chlor-Alkali Facility
Jennifer Lambert, P.G.
9:30 a.m.-11:30 a.m.
Determining Flow Conditions in Crystalline Bedrock Wells Using Dissolved Oxygen as a Tracer
Demonstrating Three-Dimensional Electrical Resistivity Imaging in Fractured Rock to Characterize Fractures and Monitor Amendment Injections
High Resolution Hydraulic Profiling and Groundwater Sampling Using FLUTe System in a Fractured Limestone Setting
Gry Sander Janniche, Ph.D.
A Photometric Logging Probe for Dilution Logging in Fractured Bedrock Aquifers
Frederick L. Paillet
10:50 a.m.-11:30 a.m.
11:30 a.m.-12:30 p.m.
12:30 p.m.-3:10 p.m.
Deciphering Flow Conditions and Evaluating Sustainability of Groundwater in Fractured Crystalline Bedrock
Utilizing Pumping-Induced Reverse Water Level Fluctuations to Evaluate Fracture Connectivity in a Siliciclastic Aquifer System
Improved Estimates of Hydraulic Conductivity and Specific Storage from Straddle Packer Tests in Fractured Sandstone
An Integrated Approach to Identify Predominate Flow Zones within Fractured Shale Bedrock
The Geometry and Hydraulic Properties of Fractured Rocks from Particle Transport Measurements in Pumped Wells
12:30 p.m.-2:10 p.m.
Investigating Well Connectivity and Reactive Surface Area in a Sandstone Bedrock Using Ionic Tracers
Matthew W. Becker, Ph.D.
Measurement of the Spatial Distribution of Heat Exchange Using Fiber Optic-Distributed Temperature Sensing
Investigation of Hexavalent Chromium Matrix Diffusion at a Sedimentary Bedrock Superfund Site
Steven W. Chapman, M.Sc., P.Eng.
Matrix Diffusion Effects on Nitrate Fate and Transport in Prince Edward Island's Sedimentary Bedrock Aquifer
Amanda Malenica, BSc.
2:10 p.m.-3:10 p.m.
3:10 p.m.-3:25 p.m.
3:25 p.m.-5:25 p.m.
Cross-Hole Heat Tracer Tests to Assess Groundwater Flow in Fractured Rock: Successes and Lessons Learned
Peeter Pehme, Ph.D.
Contaminant Transport in a Fault Zone Aquifer
Robert M. Bond, P.G.