Post on 11-Sep-2018
transcript
2015 AIPG Conference
Hydraulic Soil Fracturing
• Benefits• Fracturing Process• Installation and Utilization• 2 Examples of Pilot Testing and Full
Scale Implementation
2015 AIPG Conference
Hydraulic Soil Fracturing
• BENEFITS -• Enhances AS/SVE, ChemOx, Bioremediation• Reduces cost
• Eliminating additional wells• Increased mass contaminant removal• Not limited to shallow depths
• Low pressures, uplift monitoring
2015 AIPG Conference
Chemical Distribution Facility• Low Permeability Soils – South
Georgia• Depth to Groundwater – 3
feet• PCE/TCE contaminants• AS/SVE not applicable• Excavation not appropriate –
active facility• Fracture one location at 5
depths (8 – 24 ft )o Approximately 1,000 lbs. sand
per fracture
2015 AIPG Conference
Hydraulic Fracturing with guar and sand
Four permanganate injection points up gradient of monitoring wells
2015 AIPG Conference
Low Pressure 10% KMnO4 Injection – Approximately 100 gallons per injection well
Manifold for four (4) KMnO4 injection wells
2015 AIPG Conference
Summary of PT
• Reduction of PCE in groundwater of shallow residuumo 24,000 ug/L to 4,000 ug/Lo Total VOCs from 45,000 ug/L to 8,000 ug/L
• Reduction of PCE in groundwater deep residuumo 20 ug/L to non-detecto Total VOCs increased from 100 ug/L to 4,000 ug/L
2015 AIPG Conference
PT and Full Scale – Warren AFBTreatment for TCE GW Plume
• Predesign testing – bench scale U of WYo Natural Oxidant Demand
• Pilot Testing 12/04 – 3 locations –one fracture eacho 1,200 lbs. KMnO4 per fracture
(Slurry)o Confirmation borings 1 week
after/3 month after fracturing
2015 AIPG Conference
H&S – Splash face screen‐ Splash Apron‐ Hard Hat‐ Rubber/Nitrile gloves‐ Tyvek® Coveralls
2015 AIPG Conference
Summary
• Permanganate diffusion from fracture approximately 2 feet to 3 feet in 2 years
• Full scale implementation performance better than pilot test.o 9 locations with 4-5 fractures each (40 fractures -
40,000 lbs. of KMnO4 slurry)o 15 to 20 feet radius of fracture
• 24% cost reduction from using additional vertical wells
2015 AIPG Conference
Summary
• Reduction in TCE Groundwater Concentrations –50% - 95% in two years
• Rebound – 10% to 30%• Mass Contaminant Reduction Approx. 50 – 75%• Total Project Cost for Full Scale Implementation (40
Fractures) and Confirmation Borings - $ 200,000• $ 150,000 – add’l monitoring wells/analytical