1. US Army Corps of Engineers Philadelphia District Groundwater Modeling

2. Problem Identification US Army Corps of Engineers Philadelphia District AOC with Water Wells Ft Dix Groundwater Study Lang Superfund Site Lakehurst NAES

3. Data Collection and Processing US Army Corps of Engineers Philadelphia District

4. Data Needs Topographic Surface Water Elevations Geologic Hydrogeologic –Conductivities –Groundwater Total Heads Climate –Rainfall –Evapotranspiration –Recharge US Army Corps of Engineers Philadelphia District Pumping Information Irrigation information Steady State or Transient Contaminates Water Chemistry Density Flow –Salinity –NAPL

5. Data Visualization – Plume Plots Horizontal Vertical US Army Corps of Engineers Philadelphia District

6. Trash Slurry Wall Injection Well Extraction Well Data Visualization – 3-D Site-wide US Army Corps of Engineers Philadelphia District

7. Data Visualization – Plume Plots US Army Corps of Engineers Philadelphia District Tranguch Gasoline Site Groundwater Study May 1998 Benzene Concentrations > 100 ppb Spring 1995 US Army Corps of Engineers, Philadelphia District Legend Concentration (ppb) 10000 7500 5000 2500 100 Coal Mine Well Location

8. GMS Boreholes Borehole Materials Layer 1 - undifferentiated Layer 2 - peat, clay, silt Layer 3A - limestone 3-D Geologic Conceptualization US Army Corps of Engineers Philadelphia District

9. 3-D Geologic Conceptualization US Army Corps of Engineers Philadelphia District Surface Layer (2 vertical elements) Middle Layer (2 vertical elements) Palm Beach/Biscayne Aquifer Palm Beach/Biscayne Aquifer Bottom Layer (2 vertical elements) Tamiami/Gray Limestone/Ochopee Tamiami/Gray Limestone/Ochopee A A’ A The conceptual geology model was developed in 2005 by Jacksonville District based on Jacksonville District’s South Florida Digital Elevation Model ReportThe conceptual geology model was developed in 2005 by Jacksonville District based on Jacksonville District’s South Florida Digital Elevation Model Report

10. 3-D Conceptual Models US Army Corps of Engineers Philadelphia District Legend Slurry Wall Location Surface of Bad Trash Water Table Surface Location of Unsaturated Trash Lipari Superfund Site Groundwater Study 2008 US Army Corps of Engineers, Philadelphia District

11. Flow Models – Water Supply US Army Corps of Engineers Philadelphia District Production Pumping Potomac C Total Head Pot C production pumps Contour Interval = 10 ft U.S. Army Corps of Engineers Philadelphia District New Castle County DE Groundwater Study Production Pumping Potomac C Total Head 5 miles N Flow Delaware River MDDE NJ Chesapeake Bay

12. Flow Models – Wetlands Permits US Army Corps of Engineers Philadelphia District Copper Mine Swamp Creek

13. Flow Models – Design Analysis US Army Corps of Engineers Philadelphia District Flow GMS Boreholes Proposed cut-of wall tip elevation (based on 02 MAR 2007 design) Borehole Materials Layer 1 - undifferentiated Layer 2 - peat, clay, silt Layer 3A - limestone Herbert Hoover Dike Regional Groundwater Flow Model Lake Okeechobee

14. Flow Models – Capture Zone Analysis US Army Corps of Engineers Philadelphia District Vineland Chemical Superfund Site Proposed New Recovery Wells

15. Flow Models – Surface/Subsurface Interaction US Army Corps of Engineers Philadelphia District l Too much/too little water for the Everglades/south Florida ecosystem l Fragmentation of natural areas l Degradation of water quality l Population growth and increased demand l Average of 1.7 billion gallons of water a day lost to tide Everglades

16. Contaminant Transport Modeling - Superfund US Army Corps of Engineers Philadelphia District Upper Sand 1 Upper Sand 2 Banded Sand Lower Clay Lower Sand Transport Run Resulting Plume – Cross Sectional View July 1993 Flow Field, SJCC/GSC Superfund Site SJCC/GSC Superfund Site (NAP) A A’ A A’ A A’

17. US Army Corps of Engineers Philadelphia District Dam Safety Analysis

18. Design Flood STA 10+25 High Tailwater Conductivity Values – Set A Material Horizontal Hydraulic Conductivity (ft/d) Vertical Hydraulic Conductivity (ft/d) Uncompacted Earth Fill0.050.005 Compacted Earth Fill0.010.001 Dumped Rock Fill1000100 Dumped Rock Fill30030 Silty Sand0.050.005 Sand and Gravel101.0 Silty Sand0.40.04 Sandy Gravel1.80.9 Sand Gravel Boulders1005.0 Silt0.0050.0005 Silty Sand Gravel0.50.05 US Army Corps of Engineers Philadelphia District Dam Safety Analysis

19. Services for A/E Contracts SOW - Write or Review Prepare Gov. Estimates and Schedules ITR Contractor Products US Army Corps of Engineers Philadelphia District

20.  Collect Available Data  Construct Conceptual Model  Identify Data Gaps  Draft Data Collection SOW US Army Corps of Engineers Philadelphia District Ft Drum Case Study

21. Modeling on the Cutting Edge of Technology ADH US Army Corps of Engineers Philadelphia District

22. Internal Technical Reviews (ITR) US Army Corps of Engineers Philadelphia District Kootenia River ITR for NWS