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Heating Oil Tank Program Update

Heating Oil Tank Program Update



Matt Lowrance from Environmental Works presented one credit hour on heating oil tank requirements.

Matt Lowrance from Environmental Works presented one credit hour on heating oil tank requirements.



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    Heating Oil Tank Program Update Heating Oil Tank Program Update Presentation Transcript

    • Oregon DEQ Heating Oil Tank Program Update ! By: Matthew Lowrance www.eworksnw.com
    • ODEQ Heating Oil Tank Program ! • Developed in 2000 ! • Set standards for Soil Samples, Decommissioning and Cleanups ! • Purpose is to Protect Human Health and Environment – Contaminating Groundwater – Indoor Air Quality ! • 20,000 closed files • ~ 50,000 open files www.eworksnw.com
    • DEQ Requirements Soil Samples Decommissioning • One sample from each end of the tank • Within 6” of the end of the tank and from 1-2’ below • Must have Soil Samples • Fill and Vent Pipes removed • Cleaned and Filled ! • *Voluntary Certification Clean Soil Samples may be used for DEQ Certification if decommission takes place within 90 days ! Contaminated Samples (>50 ppm) must be reported to DEQ within 72 hours Leaking Underground Storage Tank Database (LUST): www.deq.state.or.us/lq/ tanks/LUST/LustPublicLookup.asp ! www.eworksnw.com
    • DEQ Requirements…. ! DEQ considers who ever owns the property when contamination is identified as the responsible party ! Source of contamination must be removed immediately (tank pumped & cleaned) www.eworksnw.com
    • Three options for DEQ Cleanup & Certification • Soil Matrix (50 – 500 ppm)**most often seen after excavation has taken place – – – – – • Generic Remedy (500 – 2500 ppm) – – – – – – • Depth to groundwater Annual precipitation Native soil or rock type Sensitivity to upper most aquifer Potential receptors Contamination limited to soil No free product No ecological risk posed by release Volume of soil >2,500 ppm doesn't exceed 65 cubic yards At least 3 feet of non contaminated soil above contamination Contaminated soil above seasonal high groundwater Risk Based (2,500 – 39,000 ppm) (air sampling) – – – – No free product Full vertical and lateral extent of contamination has been delineated Representative sample has been evaluated for BTEX (benzene) and PAH (ethylbenzene & naphthalene) Exposure pathways of constituents of concern are explored and no human or ecological risk is present ! If Soil Samples > 2,500 ppm new regulations come into play www.eworksnw.com
    • In The Past • Diesel levels up to ~40,000 ppm could be left in place ! • Benzene was the driving factor determining if a site meet DEQ Standards ! • Under most circumstances contamination could be left in place ! • Only a small portion of sites required soil removal or further investigation www.eworksnw.com
    • ! • New DEQ Regulations In 2008 EPA changed the classification of two constituents contained in Diesel (ethylbenzene & naphthalene) from non - carcinogenic to carcinogenic ! • Created new screening levels for evaluating the effects on human health from volatilization and vapor intrusion into indoor air ! • Recently the DEQ’s Heating Oil Tank Program adopted these screening levels for residential heating oil tank projects ! • Ethylbenzene and Napthalene will be the driver determining cleanup activities ! • Ethylbenzene must be < .82ppm ! • Napthalene must be < 6.5ppm www.eworksnw.com
    • Evaluating Risk from Vapor Intrusion ! ! ! • Ethylbenzene must be < .82ppm (in soil) • Napthalene must be < 6.5ppm (in soil) ! Extremely overprotective of human health due to uncertainties associated with environmental modeling ! Excavation or Soil Gas Sampling is the next www.eworksnw.com step

    • Excavation vs. Air Sampling Many variables to consider • • • • • • volume of soil depth to groundwater concentration potential impacts to property projected costs Overall likelihood to meet DEQ requirements www.eworksnw.com
    • Soil Gas Sampling ! • Valuable in situations where excavation is not an option ! • Collect air samples from soil pore space ~5ft below ground surface ! • 1-2 samples needed ! • More direct evaluation of risk ! • $1,800 - $2,500.00 www.eworksnw.com
    • What does this mean for your clients? • Only sites with minimal contamination will meet Risk Based Standards and not require further evaluation ! • Many more residential heating oil tank sites will require additional work (air sampling or excavation) ! • More Expensive ! • More impact to property (removal of fences, landscaping, decks and porches) ! • Take more time www.eworksnw.com
    • Get it all with one call!! ! Radon - Heating Oil Tanks Sewer ! ! ! ! www.eworksnw.com