REMEDIAL(PROCESS(OPTIMIZATION:(( …
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REMEDIAL PROCESS OPTIMIZATION: A SUSTAINABLE REMEDIATION APPROACH Mr. Jim Colmer, P.E., BB&E Presenta5on Date: 25 August 2016
Transcript of REMEDIAL(PROCESS(OPTIMIZATION:(( …
REMEDIAL PROCESS OPTIMIZATION: A SUSTAINABLE REMEDIATION
APPROACH
Mr. Jim Colmer, P.E., BB&E Presenta5on Date: 25 August 2016
Overview • Interstate Technology Regulatory Council (ITRC) Green & Sustainable Remedia5on (GSR) Framework • GSR Case Study
– Arizona Air Na5onal Guard, 162nd Fighter Wing, Tucson, Arizona
ITRC & GSR • Interstate Technology Regulatory Council (ITRC)
ITRC & GSR ITRC Green & Sustainable Remedia5on documents are available at:
hUp://www.itrcweb.org/Guidance/ListDocuments?TopicID=9&SubTopicID=15
Documents include: -‐-‐ Green and Sustainable Remedia5on: State of the Science and Prac5ce (GSR-‐1, 2011) -‐-‐ Green and Sustainable Remedia5on: A Prac5cal Framework (GSR-‐2, 2011)
ITRC GSR Framework • GSR Planning
– Each GSR Project can be unique
• GSR Implementa5on – GSR techniques can be applied at any
project or during any project phase
ITRC GSR Planning • Evaluate/Update Conceptual Site Model • Establish GSR Goals • Stakeholder Involvement • Select Metrics, GSR Evalua5on Level, Boundaries • Document GSR Efforts Reference: ITRC. (February 2014). Green and Sustainable Remedia5on [PowerPoint slides]. Retrieved from hUp: hUps://clu-‐in.org/conf/itrc/gsr/
ITRC GSR Implementa5on
GSR APPLICATION
Inves5ga5on GSR Applica5on during planning
Remedy Evalua5on and Selec5on Ideal point for incorpora5ng GSR
Remedy Design Integra5on of GSR into selected Remedy
Remedy Construc5on GSR integral part of remedy
Opera5on, Maintenance and Monitoring Cumula5ve benefits resul5ng from GSR
Remedy Op:miza:on Sustainability performance improvement for exis:ng remedies
Closeout Support for site reuse Reference: ITRC. (February 2014). Green and Sustainable Remedia5on [PowerPoint slides]. Retrieved from hUp: hUps://clu-‐in.org/conf/itrc/gsr/
GSR Case Study Tucson, ANGB • Remedial Process Op5miza5on (RPO): Arizona Air Na5onal
Guard, 162nd Fighter Wing, Tucson, Arizona • RPO is a tool by which the Air Force evaluates the status of remedia5on processes at sites across the United States
• Primary Goals: – Ensure protec5on of human health and environment – Control Risk – Improve cleanup efficiency (cost and 5me)
• Adap5ve management approach • GSR evalua5on & implementa5on
GSR Case Study Tucson, ANGB • Project Segng – Por5on of the Tucson Interna5onal Airport Area Superfund Site
– Primary chemical of concern -‐ TCE – Record of Decision (ROD)
• Remedy Groundwater Pump, Treat, and Reinject • Groundwater capture and control
• Community Segng – Engaged Community – Tucson water treatment infrastructure
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Tucson Interna5onal Airport Authority Superfund Site
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Plume B Area
5.0 – 10 ppb zone
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Tucson System Details • 15 Groundwater extrac:on pumps • Pretreatment with sequestering agent • Two air strippers • Vapor-‐phase Granular Ac:vated Carbon (GAC) treatment • Reinjec:on of treated groundwater through 5 injec:on
wells
GSR Evalua5on
• Iden5fies opportuni5es to improve GSR parameters of exis5ng remedies – Energy efficiency – Decrease air emissions (including CO2) – Minimize material use and wastes generated – Minimize water use and maximize water reuse – Minimize soil and habitat disturbance – Improve long-‐term stewardship
• Ensure protec5on of human health and the environment
Tucson System Metrics • 1997 – 2011 – Captured ~ 800M gallons and removed ~ 38 lb TCE (3 gallons)
– 2008-‐2011: Influent < 5 µg/L (MCL) 32 of 36 sampling events.
– 2008-‐2011 Average monthly energy consump5on 22K (kilowaU-‐hours) kWh or 265K kWh per year • Approximately 250 metric tons CO2 equivalents emiUed based on energy use per year • 14 metric tons CO2 based on transporta5on per year
Tucson Key Findings
• Significant energy usage to treat minimal mass • Large CO2 mass emiUed/mass contaminant removed
• Significant material use & waste from long-‐term monitoring (LTM) rou5nes – Nearly 9 miles of polyethylene tubing
• Significant groundwater mounding caused by reinjec5on
• More cost effec5ve opportunity to use solar power if energy demand reduced
Tucson Substan5ve Recommenda5ons • Energy – Switch to a passive remedia5on approach
• Material use & waste minimiza5on – Ini5ate passive diffusion bag (PDB) valida5on study
Tucson ANG Today
• Presented GSR evalua5on findings to USEPA in August 2009
• January 2010 -‐ USEPA presented the poten5al for discon5nua5on of the ANG treatment system in favor of In-‐Situ Chemical Oxida5on (ISCO) and Monitored Natural AUenua5on (MNA) at the Unified Community Advisory Board (UCAB)
• April 2010 -‐ Mee5ngs with USEPA to discuss ISCO & MNA ROD Amendment
• April 2012 – ROD Amendment finalized for discon5nua5on of Pump & Treat in favor of ISCO & MNA.
More ITRC & GSR ITRC Green & Sustainable Remedia5on online training archive from February 20, 2014 is available at: hUps://clu-‐in.org/conf/itrc/gsr_022014/ New feature: arer viewing the seminar archive and comple5ng the feedback form, check the box at the boUom of the feedback form to receive a par5cipa5on cer5ficate
