Vikas_Tandon_Modeling Services Portfolio 02 03 11
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Vikas_Tandon_Modeling Services Portfolio 02 03 11



Groundwater modeling and hydrogeology services

Groundwater modeling and hydrogeology services



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    Vikas_Tandon_Modeling Services Portfolio 02 03 11 Vikas_Tandon_Modeling Services Portfolio 02 03 11 Presentation Transcript

    • Shaw’s Environmental & Infrastructure Group
    • Vikas Tandon February 3, 2011 Stoughton, MA
      Modeling Services & Capabilities
    • Qualifications Highlights
      • Ph.D., Hydrogeology
      • P.G., Pennsylvania
      • 14 years experience
      • Leadership Committee, NGWA Groundwater Law Group
      • Chair, Shaw Fate & Transport Technology Exchange
    • Expertise Overview
      • Hydrogeologic Investigations and Data Interpretation
      • Modeling
      • Aquifer Hydraulics, Well Field Design
      • Groundwater / Surface Water Interaction
      • Dewatering Design
      • Remedial System Optimization
      • Litigation Support
      • NPDES Permit Support
      • Project/Task Management
    • Model Applications
      • Groundwater Flow Analysis
      • Well Head Protection
      • Water Supply Development and Impact Analysis
      • Dewatering Design
      • Infiltration Analysis
      • Remedial Design
      • Soil Leaching
      • Contaminant Fate and Transport
      • O&M System Optimization
      • Plant Discharges to Surface Water
    • Model Codes
      MODFLOW, WINFLOW, … groundwater flow
      MODPATH particle tracking and capture zone delineation
      CORMIX modeling discharge to rivers, lakes and ocean
      MT3D, RT3D, WINTRANS.. contaminant transport
      SEAWAT density-driven flow and transport
      PEST automatic model calibration
      BIOSCREEN, BIOCHLOR screening level fate and transport of petroleum hydrocarbon and chlorinated solvents
      HELP, VLEACH, SESOIL contaminant migration through unsaturated soil zone
      MAROS monitored natural attenuation
    • Fate & Transport Modeling
      • Monitored Natural Attenuation
      • Groundwater Extraction
      • In-Situ Chemical Treatment
      • Physical Containment
      • Chemical Containment
    • Groundwater Pump and TreatMaywood FUSRAP Site, NJ
    • 9
      St. Mary’s Refining Company, WV MNA , Benzene Plume
    • 10
      St. Mary’s – 5 Year Benzene Plume
    • 11
      St. Mary’s – 10 years Benzene Plume
    • 12
      St. Mary’s – 30 years Benzene Plume
    • Remedial System Optimization
      • Re-evaluate remedial system operations
      • Objectives:
      Optimize performance
      Reach remediation goals
      Avoid endless O&M
      Lower O&M costs
      Cost-effective closure
      Simplify operations
    • 14
      MCAS Cherry Point – Existing System
    • 15
      MCAS Cherry Point – Optimized System
    • 16
      MCAS Cherry Point – Scenario 2
    • Dewatering Design
      • Often required for mining and construction
      • Improper water management practices may lead to:
      Unsafe work conditions
      Reduction or loss of water supply for other users in community
    • Case Study: Roaring Spring, PA
    • Water Resource Litigation
      • Roaring Spring – 10 million gallons/day flow
      • Water source for industrial and domestic users
      • Limestone/Dolostone Quarry Expansion
      • Mine permit requires prediction of impacts on water supply
    • Conflict Resolution:Technical Tools and Approach
      • Scientific evaluation of effects of dewatering on regional water supplies
      • Prediction of short-term and long-term impacts
      • Numerical models efficiently integrate local complexities
      Geo-science tools used
      • pumping tests
      • aerial photographs
      • fracture trace analysis
      • groundwater flow path delineation
      • surface water measurements
      • water budget calculations
    • Quarry Dewatering – Model Prediction
      • All model predictions are uncertain to some extent
      • Higher uncertainty = lower confidence
      • Uncertainty quantified by calibration error
      • Location of uncertainty as important as the magnitude
      Causes of uncertainty
      • Lack of site-specific data
      • Parameter selection ambiguity
      • Flow system conceptualization inaccuracies
    • VOGTLE Nuclear Island Dewatering
      Technologies modeled
      • Extraction wells
      • Trenches
      • Horizontal Drains
      • Slurry wall
      • Large volume, multi-year duration
      • Excavate to 95 feet below grade, about 35 feet below water table
      • 3-dimensional MODFLOW /MODPATH model
      • Estimated impact on community water supply
    • Modeling Cooling Water / Wastewater Discharge to Surface Water
      NRG Dunkirk Generating Station, NY (2009)
      VC Summer Nuclear Power Plant, SC (2010)
      FMC Corporation Tonawanda Plant, NY (2008)
      RRI Energy, Conemaugh Power Plant, PA (2008)
    • Modeling Cooling Water / Wastewater Discharge to Surface Water
      RRI Energy, Keystone Power Plant, Shelocta, PA (2007)
      El Palito Refinery, Petróleos de Venezuela, S.A., Venezuela (2006)
      Von Roll America, East Liverpool, OH (2005)
    • Selenium Mixing in Lake ErieNRG Dunkirk Power Station, NY
    • VC Summer Nuclear Station Diffuser Modeling
      • Cooling water blowdown and waste water discharge to mix with waters of the Parr Reservoir located on the Broad River
      • Multi-port diffuser design by Shaw.
      • Mixing of the discharge simulated using the computer model CORMIX
    • VC Summer – Par Shoals Dam
    • VC Summer Nuclear Station Diffuser Modeling
      Model simulations were performed to determine :
      • Mixing zone dimensions as per SCDHEC requirements
      • Maximum river water temperature increase of 5°F
      • Max. river water temperature of 90°F
      • Mixing zone boundary of 1/2 the width of the river and a downstream length of 2 x the river width
      • Effluent dilution factors
    • Guterl Steel FUSRAP, Lockport, NY
      Issue: Uranium contaminated soil and groundwater
      Project Tasks
      • Data Gap Assessment
      • Soil Leachate Modeling
      • Groundwater Modeling
      • Feasibility Study
    • FP&L Proposal – Radial Collector Well
    • Modeling Costs versus Benefits
      Costs reflect project complexity and goals
      • aids project planning
      • provides basis for decision making based on integrated assessment of data
      • saves on long term costs
      Pump & Treat System Optimization
      Marine Corps Air Station, Cherry Point, NC
      Net system capacity reduction of 17% was recommended, resulting in estimated cost savings of $450,000 per year
    • Conclusions
      Modeling is a powerful tool for evaluating complex problems
      Models are useful when multiple factors affecting the results are interconnected and change with time and/or space
      Modeling can help projects navigate through an array of issues related to environmental impact delineation, remedial design and permitting
      Shaw E & I has capabilities and experience to support soil, groundwater and surface water modeling needs
    • Key Collaborators
      Jonathan Myers, Ph.D.
      • Geochemistry & Geochemical Modeling
      • TransportParameter Development
      • Environmental Forensics
      • Environmental Statistics
      • Natural Attenuation Investigations
      • Metals Background Investigations
      Gary Gaillot, P.G., C.G.W.P.
      • Developing and Implementing Hydrogeological Investigations
      • Developing and Implementing Surface Investigations
      • Developing and Implementing Surface Water / Groundwater Interaction Investigations
      • Surface and Groundwater Modeling
      • Designing and Installing Groundwater Extraction Well Fields, Horizontal Wells
      • Groundwater Remediation
      Sue Tituskin, P.G.
      • RI/FS/CERCLA Five Year Reviews
      • RCRA Corrective Action
      • Remedial Scenario Evaluation
      • Remedial System Optimization
      • Remedial System Performance Evaluation
      Ke Liu, Ph.D.
      • GIS
      • 3-D Visualization
      • Geo-statistics
      • Soil Leachate, Vapor Intrusion Modeling
      • Database Development
    • Questions?