1. Bill Reetz Kansas P.G. A Better Earth, Inc. Lawrence, KS 66044
A Better Earth, Inc
11/20/2018

2. Brett Tavener, Kansas Department of Health & Environment
Oxygen Injection in Deep Fractured Limestone to Stimulate Hydrocarbon Biodegradation
Special Thanks to:
Sean Carter, Matrix Oxygen Injection Systems
Matt Kralik, Coranco Great Plains
Brett Tavener, Kansas Department of Health & Environment
A Better Earth, Inc
11/20/2018

3. Site Specifics City public well approx 240’ from source
Former service station
“Non-active site”- freedom for implementation
Clays, limestones, limestones with shale seams
GW levels ~80’ bgs.
GW concentrations up to 3,900 ppb BTEX
How do we remediate the contaminated water??
SVE pilot test failed miserably
Soil excavation in 2008
Removed ~722 yds3 to roughly 13’ bgs
City public well approx 240’ from source
Primary regulatory driver
A Better Earth, Inc
11/20/2018

4. Matrix O2 Injection System
Excavated Soils
Matrix O2 Injection System
A Better Earth, Inc
11/20/2018

5. Geology- “it’s what rocks the world!”
A Better Earth, Inc
11/20/2018

6. A Better Earth, Inc
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7. A Better Earth, Inc
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8. Decisions Obstacles: Needs:
SVE is not an option, hence air sparge is not an option either
Considerable dissolved phase GW contamination
Needs:
One time installation
No “return attempts” adding equipment
Enhance bioremediation of dissolved phase plume
Minimal site impact
Effective lbs O2/$$
No “fire & reload” attempts
A Better Earth, Inc
11/20/2018

9. Prefered Technology Matrix 12 point, 30 scfh Oxygen System
Provides sustained levels of high purity O2
12 similar operating systems in Kansas
2 in Nebraska, 2 in Oklahoma, 2 in Texas
Over 300+ sites in US/Canada
Full system fits magnitude of the site
Patented technology
No requirement for SVE (source area removed)
A Better Earth, Inc
11/20/2018

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15. Analysis and Results
D.O. maps show increase-decrease-increase cycles- Why?
Prior to startup: <2 mg/L
Post startup: mg/L
Immediate rise in D.O. levels indicate switch from anaerobic to aerobic conditions and usage of the oxygen by microbes
Over time D.O. rises and falls because of less contaminants consumed by the microbes
Results of operation over 3 years
4.4 lbs of O2 per injection point per day
Closure time, system is being removed
One well with <20 ppb Benzene
A Better Earth, Inc
11/20/2018

16. Site “A” Plan View
A Better Earth, Inc
11/20/2018

17. Site “A” D.O. Utilization
A Better Earth, Inc
11/20/2018

18. Site “A” VOC Degradation
A Better Earth, Inc
11/20/2018

19. Laboratory Study Results
(Days)
A Better Earth, Inc
11/20/2018

20. Oxygen Injection Equilibriums:
90% pure oxygen has an equilibrium in water of 36mg/L
21% oxygen (air sparge) at same conditions has an equilibrium in water of 8 mg/L
High D.O. stimulates aerobic and facultative anaerobic bacteria, inhibiting growth of iron- reducing bacteria, i.e. will not add to iron slime deposits on well screens
Pulsed injection for sufficient dispersion
Provides for sustained high levels of D.O.
Eliminates depleting source of D.O. preventing return to reducing conditions
Oxygen must be distributed throughout the plume
Dispersion and Advection, same paths as the contaminants
A Better Earth, Inc
11/20/2018

21. Oxygen Injection
Oxygen injection yields homogenous distribution of high levels of D.O. rather than unconnected D.O. “plumes” often associated with slow release peroxides and down-well oxygen diffusers
>1 lb/day/point vs <0.1 lb/day/point
Gasoline oxygenates (ex. MtBE), require higher D.O. concentrations than aromatics. A depleting D.O. scenario risks deactivating contaminant degraders.
A Better Earth, Inc
11/20/2018

22. Safety Pressure sensors trigger alarms and shuts down system
Stops production of O2
Passive venting of trailer to atmosphere prevents O2 enriched environment
O2 Storage
Tank <64 ft3 total volume
Tank vented to atmosphere
Small flash but no explosion if there is a broken valve or tubing
A Better Earth, Inc
11/20/2018

23. Safety Systems placed in downtown NYC and bulk storage facilities
Questions are common, but yet to be turned away from any site installation
Supplied purity meter can be used to monitor O2 and reach inside to measure ambient inside trailer
“No Smoking” placards

24. Another Tool in Toolbox
Potentially quicker remediation time frames
Easier to install
Can be installed and operating in a day
Less maintenance, lower utility costs
Quieter
Effective
Limitations
Low porosity (clays, what does work?)
NAPL is not biodegradable
O2 treats the dissolved phase, not unsaturated
A Better Earth, Inc
11/20/2018

25. Questions?????????? Feel free to ask now, during a break, call me, or send me an . I am happy to answer any questions. Thank You!
A Better Earth, Inc
11/20/2018