Vikas_Tandon_Modeling Services Portfolio 02 03 11

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Groundwater modeling and hydrogeology services

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Vikas_Tandon_Modeling Services Portfolio 02 03 11

  1. 1. Shaw’s Environmental & Infrastructure Group<br />
  2. 2. Vikas Tandon February 3, 2011 Stoughton, MA <br />Modeling Services & Capabilities<br />
  3. 3. Qualifications Highlights<br /><ul><li>Ph.D., Hydrogeology
  4. 4. P.G., Pennsylvania
  5. 5. 14 years experience
  6. 6. Leadership Committee, NGWA Groundwater Law Group
  7. 7. Chair, Shaw Fate & Transport Technology Exchange</li></li></ul><li>Expertise Overview<br /><ul><li>Hydrogeologic Investigations and Data Interpretation
  8. 8. Modeling
  9. 9. Aquifer Hydraulics, Well Field Design
  10. 10. Groundwater / Surface Water Interaction
  11. 11. Dewatering Design
  12. 12. Remedial System Optimization
  13. 13. Litigation Support
  14. 14. NPDES Permit Support
  15. 15. Project/Task Management </li></li></ul><li>Model Applications<br /><ul><li>Groundwater Flow Analysis
  16. 16. Well Head Protection
  17. 17. Water Supply Development and Impact Analysis
  18. 18. Dewatering Design
  19. 19. Infiltration Analysis
  20. 20. Remedial Design
  21. 21. Soil Leaching
  22. 22. Contaminant Fate and Transport
  23. 23. O&M System Optimization
  24. 24. Plant Discharges to Surface Water</li></li></ul><li>Model Codes<br />MODFLOW, WINFLOW, … groundwater flow<br />MODPATH particle tracking and capture zone delineation<br />CORMIX modeling discharge to rivers, lakes and ocean<br />MT3D, RT3D, WINTRANS.. contaminant transport<br />SEAWAT density-driven flow and transport<br />PEST automatic model calibration<br />BIOSCREEN, BIOCHLOR screening level fate and transport of petroleum hydrocarbon and chlorinated solvents<br />HELP, VLEACH, SESOIL contaminant migration through unsaturated soil zone <br />MAROS monitored natural attenuation <br />
  25. 25. Fate & Transport Modeling <br /><ul><li>Monitored Natural Attenuation
  26. 26. Groundwater Extraction
  27. 27. In-Situ Chemical Treatment
  28. 28. Physical Containment
  29. 29. Chemical Containment </li></li></ul><li>Groundwater Pump and TreatMaywood FUSRAP Site, NJ<br />
  30. 30. 9<br />St. Mary’s Refining Company, WV MNA , Benzene Plume<br />
  31. 31. 10<br />St. Mary’s – 5 Year Benzene Plume<br />
  32. 32. 11<br />St. Mary’s – 10 years Benzene Plume<br />
  33. 33. 12<br />St. Mary’s – 30 years Benzene Plume<br />
  34. 34. Remedial System Optimization<br /><ul><li>Re-evaluate remedial system operations
  35. 35. Objectives: </li></ul>Optimize performance<br />Reach remediation goals<br />Avoid endless O&M<br />Lower O&M costs <br />Cost-effective closure<br />Simplify operations <br />13<br />
  36. 36. 14<br />MCAS Cherry Point – Existing System<br />
  37. 37. 15<br />MCAS Cherry Point – Optimized System<br />
  38. 38. 16<br />MCAS Cherry Point – Scenario 2<br />
  39. 39. Dewatering Design <br /><ul><li>Often required for mining and construction
  40. 40. Improper water management practices may lead to:</li></ul>Flooding<br />Unsafe work conditions<br />Reduction or loss of water supply for other users in community<br />
  41. 41. Case Study: Roaring Spring, PA<br />
  42. 42. Water Resource Litigation<br /><ul><li> Roaring Spring – 10 million gallons/day flow
  43. 43. Water source for industrial and domestic users
  44. 44. Limestone/Dolostone Quarry Expansion
  45. 45. Mine permit requires prediction of impacts on water supply</li></li></ul><li>Conflict Resolution:Technical Tools and Approach<br /><ul><li>Scientific evaluation of effects of dewatering on regional water supplies
  46. 46. Prediction of short-term and long-term impacts
  47. 47. Numerical models efficiently integrate local complexities</li></ul>Geo-science tools used<br /><ul><li> pumping tests
  48. 48. aerial photographs
  49. 49. fracture trace analysis
  50. 50. groundwater flow path delineation
  51. 51. surface water measurements
  52. 52. water budget calculations</li></li></ul><li>Quarry Dewatering – Model Prediction<br />
  53. 53. MODEL UNCERTAINTY<br /><ul><li>All model predictions are uncertain to some extent
  54. 54. Higher uncertainty = lower confidence
  55. 55. Uncertainty quantified by calibration error
  56. 56. Location of uncertainty as important as the magnitude</li></ul>Causes of uncertainty<br /><ul><li> Lack of site-specific data
  57. 57. Parameter selection ambiguity
  58. 58. Flow system conceptualization inaccuracies</li></li></ul><li>VOGTLE Nuclear Island Dewatering<br />Technologies modeled<br /><ul><li>Extraction wells
  59. 59. Trenches
  60. 60. Horizontal Drains
  61. 61. Slurry wall
  62. 62. Large volume, multi-year duration
  63. 63. Excavate to 95 feet below grade, about 35 feet below water table
  64. 64. 3-dimensional MODFLOW /MODPATH model
  65. 65. Estimated impact on community water supply </li></li></ul><li>
  66. 66. Modeling Cooling Water / Wastewater Discharge to Surface Water<br />NRG Dunkirk Generating Station, NY (2009)<br />VC Summer Nuclear Power Plant, SC (2010)<br />FMC Corporation Tonawanda Plant, NY (2008)<br />RRI Energy, Conemaugh Power Plant, PA (2008)<br />
  67. 67. Modeling Cooling Water / Wastewater Discharge to Surface Water <br />RRI Energy, Keystone Power Plant, Shelocta, PA (2007)<br />El Palito Refinery, Petróleos de Venezuela, S.A., Venezuela (2006)<br />Von Roll America, East Liverpool, OH (2005)<br />
  68. 68. Selenium Mixing in Lake ErieNRG Dunkirk Power Station, NY<br />
  69. 69. VC Summer Nuclear Station Diffuser Modeling<br /><ul><li>Cooling water blowdown and waste water discharge to mix with waters of the Parr Reservoir located on the Broad River
  70. 70. Multi-port diffuser design by Shaw.
  71. 71. Mixing of the discharge simulated using the computer model CORMIX</li></li></ul><li>PARR SHOALS DAM<br />PROPOSED DISCHARGE LOCATION<br />PARR <br />RESERVOIR<br />TAILRACE DISCHARGE <br />MONTICELLO<br />RESERVOIR<br />29<br />
  72. 72. VC Summer – Par Shoals Dam<br />
  73. 73. VC Summer Nuclear Station Diffuser Modeling<br />Model simulations were performed to determine :<br /><ul><li> Mixing zone dimensions as per SCDHEC requirements
  74. 74. Maximum river water temperature increase of 5°F
  75. 75. Max. river water temperature of 90°F
  76. 76. Mixing zone boundary of 1/2 the width of the river and a downstream length of 2 x the river width
  77. 77. Effluent dilution factors</li></li></ul><li>Guterl Steel FUSRAP, Lockport, NY <br />Issue: Uranium contaminated soil and groundwater<br />Project Tasks<br /><ul><li>Data Gap Assessment
  78. 78. Soil Leachate Modeling
  79. 79. Groundwater Modeling
  80. 80. Feasibility Study</li></li></ul><li>FP&L Proposal – Radial Collector Well<br />
  81. 81. Modeling Costs versus Benefits<br />Costs reflect project complexity and goals<br />Modeling <br /><ul><li>aids project planning
  82. 82. provides basis for decision making based on integrated assessment of data
  83. 83. saves on long term costs</li></ul>Pump & Treat System Optimization<br />Marine Corps Air Station, Cherry Point, NC<br />Net system capacity reduction of 17% was recommended, resulting in estimated cost savings of $450,000 per year<br />
  84. 84. Conclusions<br />Modeling is a powerful tool for evaluating complex problems<br />Models are useful when multiple factors affecting the results are interconnected and change with time and/or space<br />Modeling can help projects navigate through an array of issues related to environmental impact delineation, remedial design and permitting <br />Shaw E & I has capabilities and experience to support soil, groundwater and surface water modeling needs<br />
  85. 85. Key Collaborators<br />Jonathan Myers, Ph.D.<br /><ul><li>Geochemistry & Geochemical Modeling
  86. 86. TransportParameter Development
  87. 87. Environmental Forensics
  88. 88. Environmental Statistics
  89. 89. Natural Attenuation Investigations
  90. 90. Metals Background Investigations</li></ul>Gary Gaillot, P.G., C.G.W.P.<br /><ul><li>Developing and Implementing Hydrogeological Investigations
  91. 91. Developing and Implementing Surface Investigations
  92. 92. Developing and Implementing Surface Water / Groundwater Interaction Investigations
  93. 93. Surface and Groundwater Modeling
  94. 94. Designing and Installing Groundwater Extraction Well Fields, Horizontal Wells
  95. 95. Groundwater Remediation</li></ul>Sue Tituskin, P.G.<br /><ul><li>RI/FS/CERCLA Five Year Reviews
  96. 96. RCRA Corrective Action
  97. 97. Remedial Scenario Evaluation
  98. 98. Remedial System Optimization
  99. 99. Remedial System Performance Evaluation</li></ul>Ke Liu, Ph.D.<br /><ul><li>GIS
  100. 100. 3-D Visualization
  101. 101. Geo-statistics
  102. 102. Soil Leachate, Vapor Intrusion Modeling
  103. 103. Database Development</li></li></ul><li>Questions?<br />412-877-7738, vikas.tandon@shawgrp.com<br />

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