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Bedrock Aquifer Workshop Providence, RI November 2000. John E. Vidumsky, P.E. DuPont Corporate Remediation Group. SOME REAL DATA CONCENTRATIONS IN PPM. SITE TCE c-DCE VC Kelly AFB LF-1, TX 88 480 70 Cape Canaveral, FL 270 160 35

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Bedrock aquifer workshop providence ri november 2000 l.jpg

Bedrock Aquifer WorkshopProvidence, RINovember 2000

John E. Vidumsky, P.E.

DuPont

Corporate Remediation Group


Slide2 l.jpg

SOME REAL DATA

CONCENTRATIONS IN PPM

SITETCEc-DCEVC

Kelly AFB LF-1, TX 88 480 70

Cape Canaveral, FL 270 160 35

DOE Pinellas, FL 1,700 210 130

Auburn, NY 800 430 100

Niagara Falls, NY 38 780 72


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Some Observations Since 1985

  • Much of what we thought we knew about groundwater remediation turned out to be wrong, including….

    • Chlorinated solvents don’t biodegrade

    • Most plumes could be remediated in a reasonable time frame through pumping

  • Things turned out to be much more complex than we thought

    • Finding and removing DNAPL, sources


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YEAR 2000 OBSERVATIONS

  • Many thought we’d be largely done by now

  • On a the bright side, we are on a very steep part of the learning curve!

    • Plumes as multi-component systems

    • Microbial ecology and metabolism in aquifers

    • Permeable reactive barriers / Zero valent iron

    • Modeling advances


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Some of Today’s Buzz-Words

  • Geochemistry

  • Redox potential

  • Electron donors, receptors

  • Matrix diffusion

  • Plumes in steady state

  • Reductive dechlorination

  • Source control


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Objectives for Remediation Session

  • Ascertain the State of the Practice of bedrock aquifer remediation in year 2000

  • Share key learnings from successes

    • What worked under what circumstances and why

    • Applicability to other sites

  • Share key learnings from “works in progress”


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Presenters and Case Studies

  • Kent Sorenson - Lockheed Martin Idaho

    • Enhanced biological reductive dechlorination of chlorinated solvents in a bedrock aquifer

  • Paul Mazierski - DuPont

    • Pump and treat experience at the Necco Park Superfund Site

  • Todd Rees - Golder Associates

    • Natural containment remedy at the Berks County Landfill Superfund Site


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Guidelines for Discussion

  • Keep an open mind

    • Much of what we think we know today will likely turn out to be incomplete

  • Please participate

    • Everybody’s experience and input is valuable

  • Have fun!


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