Transcript Roger Lambx

Rapid, Real-Time High Resolution Site Characterization
Use of MiHpt Systems to Improve Project Outcomes
© 2011 COLUMBIA Technologies.
© 2013 COLUMBIA Technologies.
Presentation Outline
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Basic Mechanics of the MiHpt and LLMiHpt
Interpretation of MiHpt and LLMiHpt data
Project Examples–Mixed VOCs, Gasoline, and TCE
Investigation Design
Collaborative Data Sets
Future Field Test of VOC Speciation
© 2011 COLUMBIA Technologies.
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MiHpt Diagram
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© 2012 COLUMBIA Technologies.
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Ultra Pure
Compressed Gases
Depth
Detector
Electrical
Generator
(self sufficient)
Drill
Rods
MiHpt
Transfer
Line
© 2013
© 2011
COLUMBIA
COLUMBIA
Technologies.
Technologies.
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Membrane Interface Probe (MIP)
Quick Notes:
- Volatile Organic Compounds (VOCs), 60
measurements/foot
- Vapor, Dissolved Phase, Sorbed Phase,
some NAPL
- Typical DL: 1 ppm fuel / 200 ppb solvent
(can be lower with special procedures)
- Low Level DL: 1 to 50 ppb VOCs , 3
measurement/foot
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Hydraulic Profiling Tool (HPT)
Sample HPT Log
Quick Notes:
- Water injected at approx . 100 ml/min
- 20 measurements per foot, flow rate,
pressure and EC
-Dissipation test to determine head of water
over probe.
-Pressure and flow measurements collected
from below the groundwater surface can be
converted to approximations of K .
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HPT Log X-section – EC and Pressure
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Gasoline Plume and PCE Plume Separation
Gasoline Plume defined by PID
Gasoline migration at
shallower depth vs
deeper PCE, both in
thin layers of higher
permeability as
defined by HPT data
PCE Plume defined by XSD
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© 2012 COLUMBIA Technologies.
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LLMiHpt Log
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Project Examples
• MIP/EC Data – Mixed CVOC Plume – Australia
• MiHpt Data – Gasoline Plume - US
• MIP/EC, MiHpt, and LLMiHpt – TCE Plume - US
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MIP Project Example
• Provide Example to AU Regulators of HRSC.
• Focus Remediation Efforts for Property
Redevelopment.
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Layout of SC/MIP soundings on the Project Site
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X-section through soil electrical conductivity (EC) data
(EC data shows alluvium of interbedded silts and sands, silts-yellow
shading sand-green and blue)
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Plan-view through MIP XSD Data
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X-Section through MIP XSD Data
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© 2012 COLUMBIA Technologies.
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Plain-View through FID (flame ionisation detector)
Data at a depth of 3 metres
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X-section through FID (flame ionisation detector) data
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MIP XSD Volume Calculations
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MiHpt Gasoline Example
• Provide evidence of separate gasoline
plumes.
• Regulators attempting to assign remediation
costs.
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MIP PID 0 to 2 feet
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MIP PID 0 to 6 feet
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MIP PID 0 to 12 feet
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MIP PID 22 to 28 feet
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Benzene in
groundwater map
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MiHpt PID/Pressure X-sections
through the gasoline plume
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MIP/EC, MiHpt and LLMiHpt Example
• Define lateral and vertical distribution of TCE
to determine if vapor is impacting potential
receptors.
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X-section MIP/EC, MiHpt, LLMiHpt
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Investigation Design
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Business Goals.
Detailed Conceptual Site Model.
Anchor Points – Existing Wells or Borings.
Source areas.
Property boundaries.
Define exposure to receptors.
Grid approach for pre-defined remediation
areas.
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Collaborative Data Sets
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Soil, Groundwater, Soil Vapor Analytical,
Lithology,
Geochemistry,
Permeability to water,
LNAPL Transmissivity,
ISCO Radius of Influence
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Snap Sampler – ProHydro Inc.
In-well baffle device/
Mixing inhibitor
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Britt, SL and Calabria M, 2008, Baffles may
allow effecting multilevel monitoring in
traditional monitoring wells, Battelle
Chlorcon Conference, Monterey
California, May 2008
MIP Data Used in Well Design
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© 2012 COLUMBIA Technologies.
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Draft of Converting MiHpt data to Mass Flux
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Mass transport zones
< 10% of area
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Future Field Test of VOC Speciation
• Mobile GC analysis of MIP Gas Stream
• Speciation of a Target List of VOCs
• Analytical Results on 7 minute Intervals
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© 2012 COLUMBIA Technologies.
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PCE
TCE
trans-1,2-DCE
www.defiant-tech.com
Cis-1,2-DCE
FROG-4000
Detect VOCs in air down to 0.5ppbv.
1/16”
SwageLok
Sampling Subslab port in
Indianapolis
© 2011 COLUMBIA Technologies.
One More Final Thought
It is far better to be approximately correct with a huge data set
than precisely wrong with a limited data set.
Thank You!
Questions?
www.columbiatechnologies.com
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© 2013 COLUMBIA Technologies.
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