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Gas Mitigation Program Residents out of homes 406 days—1 year, 1 month, 9 days

Gas Mitigation Program Residents out of homes 406 days—1 year, 1 month, 9 days. September 12, 2013. Gas Mitigation Program. Control shallow gas above the MRAA with dual-phase vapor extraction Remove gas from MRAA using similar gas/water extraction.

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Gas Mitigation Program Residents out of homes 406 days—1 year, 1 month, 9 days

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  1. Gas Mitigation ProgramResidents out of homes406 days—1 year, 1 month, 9 days September 12, 2013

  2. Gas Mitigation Program • Control shallow gas above the MRAA with dual-phase vapor extraction • Remove gas from MRAA using similar gas/water extraction

  3. Respec Dual-Phase Vapor Extraction (DPVE) Pilot Test • Pilot test ran for a total of 219 hours. • DPVEtest was shut down at 14:00 on September 6, 2013. • Total methane removed = 6.9 pounds per hour methane or ~4,000 scfd • Bubbles started to reappear at NSDBS-026 within 90 minutes of shut down.

  4. Dual Phase Vapor Extraction Pilot Test PRIOR TO START UP Wednesday August 28, 2013 07:30 AM 3 hours prior to startup September 6 12:45 1 hour prior to shut down Forty horsepower oil-sealed dual phase liquid ring pump September 10, 2013 4 days after shutdown Compressor Very successful test conducted by Respec!

  5. Dual-Phase Vapor Extraction System Crawl space Slab-on-grade DPVE System Clay Aquitard Fine-grained sand MRAA Aquifer Gas

  6. Trailer Mounted DPVE Unit

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