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Remediation System Design & Implementation Presented by

American Institute of Professional Geologists (Kentucky Section) Professional Development Conference April 19, 2011 “An Overview of Contaminated Site Investigation and Remediation”. Remediation System Design & Implementation Presented by. Remediation.

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Remediation System Design & Implementation Presented by

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  1. American Institute of Professional Geologists (Kentucky Section)Professional Development ConferenceApril 19, 2011 “An Overview of Contaminated Site Investigation and Remediation” Remediation System Design & Implementation Presented by

  2. Remediation • For the purpose of this presentation, remediation is assumed to be any mechanical means of removing or reducing petroleum hydrocarbon mass in the subsurface.

  3. Remediation • is a means to an end

  4. Remediation • is the process by which an NFA is achieved

  5. Remediation • is the “end” is No Further Action

  6. Remediation • Prerequisites for a comprehensive remedial system. • Site Conceptual Model • Feasibility Study • Pilot Test • Design and Construction

  7. Site Conceptual Model • Critical to effective system design, installation and operation • Minimum data package: • Source area definition • Geologic and groundwater framework • Historic liquid level data • Soil and groundwater concentration data; with vertical, horizontal and temporal coverage • Boring logs and well diagrams • Cross sections

  8. Site Conceptual Model • Additional model data should include: • Summary of receptors • State regulatory compliance targets • Risk-based clean up concentrations

  9. Site Conceptual Model • Definition of remedial goals • Set remedial technology target concentrations for: • Source zone, with respect to horizontal and vertical profiles • Down-gradient locations; i.e. property lines, water wells, other receptors

  10. Site Conceptual Model • Define source area and required treatment zones

  11. Feasibility Study • Minimum elements • Survey all potentially applicable technologies • Include preliminary cost comparisons over life-cycle • Evaluate impact on site features • Evaluate with respect to remedial goals

  12. Pilot Tests • The purpose of a pilot test is to generate sufficient high-quality data around which to design an efficient remediation system.

  13. Pilot Tests • Example Pilot Test Flow chart

  14. Remediation • System Design & Construction

  15. Remediation • System Design & Construction • Inspect system construction details prior to delivery

  16. Remediation System Installation • Logistics to complete include power drops

  17. Remediation System Installation • Subgrade infrastructure – extraction piping details

  18. Remediation System Installation • Subgrade infrastructure – should provide sufficient control • for air flow • liquid flow

  19. Remediation System Installation • Subgrade infrastructure – extraction wellhead assembly; adjustable drop-tube

  20. Remediation System Installation • Subgrade infrastructure – extraction wellhead assembly; adjustable drop-tube advantages

  21. Remediation System Installation • Site-Specific Issues • Overhead Utilities • System Enclosure Locations • Site-specific application • Infrastructure additions: • Extraction wells • Sparge points • Observation points

  22. Remediation System Startup & Shakedown Considerations • Equipment break in • Process “debugging”

  23. Remediation System Startup & Shakedown Considerations • Adjustments for site specific factors • Post pilot test findings • System balancing • Flow rates: liquids, vapors, hydrocarbons

  24. Operational Phase • Vital Elements for Successful Remediation • Effective performance • Run Time • Common causes of system shutdowns - Power outages Simple fix: add alarm callout routine to PLC after power is restored

  25. Operational Phase • Vital Elements for Successful Remediation • Effective performance • Run Time • Common causes of system shutdowns – Sediment filters • Simple fix: install additional filter housings

  26. Operational Phase • Vital Elements for Successful Remediation • Effective performance • Run Time • Common causes of system shutdowns – Pump failure • Simple fixes: add wye strainer (sediment filter) to pump inlet. Clean float control switches

  27. Operational Phase • Vital Elements for Successful Remediation • Targeted application • SCM • Treatment zone • Vertical extent of remediation • Horizontal extent of remediation

  28. Operational Phase • Vital Elements for Successful Remediation • Effective monitoring; timely & accurate • Run Time • Mass Removal • ROI • Quarterly Groundwater Sampling Results • Confirmation Soil Sampling Results

  29. For More Information Chemviron Midwest, Inc. 3000 Old Airport Road, Suite A, Wooster, Ohio 44691 330-264-2000 www.chemviron.com or Cemcor Environmental Services Craig Marlow 8248 Hidden Forest Drive, Holland, Ohio 43528 Phone 419.867.8966 Fax 419.867.8976 Cell 419.349.7970 Email cemarlow@att.net or web: www.cesremediation.com “Offering you the finest environmental contracting services, products & remedial technologies available”

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