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Onalaska Wood Pyrolysis Plant

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Secondary containment following decontamination and sidewall removal.<br />Date Taken: 7/22/2021<br />Category: Site Photo<br />Latitude: 46.5725972222222<br />Longitude: -122.728683333333<br />Tags:
Decontamination of equipment prior to demobilization.<br />Date Taken: 7/19/2021<br />Category: Site Photo<br />Latitude: 46.5726305555556<br />Longitude: -122.728652777778<br />Tags:
Decontamination of debris inside secondary containment.<br />Date Taken: 6/25/2021<br />Category: Site Photo<br />Latitude: 46.572525<br />Longitude: -122.728683333333<br />Tags:
Solidifying wood tar and sludge from a tote using wood chips and sawdust.<br />Date Taken: 7/14/2021<br />Category: Site Photo<br />Latitude: 46.5725666666667<br />Longitude: -122.728675<br />Tags:
Decanting neutralized wood vinegar from totes by running liquid through a 200-micron sock filter as it is pumped into a tanker truck.<br />Date Taken: 7/14/2021<br />Category: Site Photo<br />Latitude: 46.5723027777778<br />Longitude: -122.728875<br />Tags:
Worker cutting contaminated steel AST base using a chop saw before placing debris in waste bin for shipment off-Site.<br />Date Taken: 7/13/2021<br />Category: Site Photo<br />Latitude: 46.5726166666667<br />Longitude: -122.728608333333<br />Tags:
Workers screening wood vinegar totes for pH prior to NaOH treatment.<br />Date Taken: 7/8/2021<br />Category: Site Photo<br />Latitude: 46.5721444444444<br />Longitude: -122.728561111111<br />Tags:
Workers pumping NaOH into wood vinegar totes.<br />Date Taken: 7/7/2021<br />Category: Site Photo<br />Latitude: 46.5721472222222<br />Longitude: -122.72905<br />Tags:
Workers initiating reaction of NaOH with wood vinegar using a power mixer. <br />Date Taken: 7/7/2021<br />Category: Site Photo<br />Latitude: 46.5721333333333<br />Longitude: -122.728911111111<br />Tags:
Workers transferring NaOH into wood vinegar totes to stabilize pH to desired range of 6.0-7.0 before pumping into tanker trucks.<br />Date Taken: 7/7/2021<br />Category: Site Photo<br />Latitude: 46.5722388888889<br />Longitude: -122.728805555556<br />Tags:
EPA crews used a man lift to decant AST #3 of several thousand gallons of wood vinegar. <br />Date Taken: 6/30/2021<br />Category: Site Photo<br />Latitude: 46.572425<br />Longitude: -122.728630555556<br />Tags:
An excavator bucket is used to mix the wood tar with wood chips until the material is adequately solidified.<br />Date Taken: 6/29/2021<br />Category: Site Photo<br />Latitude: 46.5728916666667<br />Longitude: -122.728233333333<br />Tags:
Solidification of wood tar removed from ASTs #1 and #2, which was carried out inside containment by mixing tar with wood chips available on-site.<br />Date Taken: 6/28/2021<br />Category: Site Photo<br />Latitude: 46.5729138888889<br />Longitude: -122.728127777778<br />Tags:
Demolition of AST #2<br />Date Taken: 6/28/2021<br />Category: Site Photo<br />Latitude: 46.5726138888889<br />Longitude: -122.728583333333<br />Tags:
Workers solidifying wood tar sludge from the floor of the AST containment area.<br />Date Taken: 6/25/2021<br />Category: Site Photo<br />Latitude: 46.5724610833333<br />Longitude: -122.728674972222<br />Tags:
Workers decanting wood vinegar from totes.<br />Date Taken: 6/23/2021<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Workers decanting wood vinegar from totes. Liquids were transferred into a 5,000-gallon tanker truck and transported to a disposal facility.<br />Date Taken: 6/23/2021<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Replacing the top on AST #2 after decanting wood vinegar/<br />Date Taken: 6/24/2021<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Demolition of AST #2<br />Date Taken: 6/24/2021<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:
Preparing to decant and demolish AST #2<br />Date Taken: 6/24/2021<br />Category: Site Photo<br />Latitude: <br />Longitude: <br />Tags:

Secondary containment following decontamination and sidewall removal. Decontamination of equipment prior to demobilization. Decontamination of debris inside secondary containment. Solidifying wood tar and sludge from a tote using wood chips and sawdust. Decanting neutralized wood vinegar from totes by running liquid through a 200-micron sock filter as it is pumped into a tanker truck. Worker cutting contaminated steel AST base using a chop saw before placing debris in waste bin for shipment off-Site. Workers screening wood vinegar totes for pH prior to NaOH treatment. Workers pumping NaOH into wood vinegar totes. Workers initiating reaction of NaOH with wood vinegar using a power mixer. Workers transferring NaOH into wood vinegar totes to stabilize pH to desired range of 6.0-7.0 before pumping into tanker trucks. EPA crews used a man lift to decant AST #3 of several thousand gallons of wood vinegar. An excavator bucket is used to mix the wood tar with wood chips until the material is adequately solidified. Solidification of wood tar removed from ASTs #1 and #2, which was carried out inside containment by mixing tar with wood chips available on-site. Demolition of AST #2 Workers solidifying wood tar sludge from the floor of the AST containment area. Workers decanting wood vinegar from totes. Workers decanting wood vinegar from totes. Liquids were transferred into a 5,000-gallon tanker truck and transported to a disposal facility. Replacing the top on AST #2 after decanting wood vinegar/ Demolition of AST #2 Preparing to decant and demolish AST #2 EPA START contractor assessing steel drums with rags and sorbent materials contaminated with wood tar waste inside. At least two drums appear to be pressurized and bulging. One drum forcefully ejected its lid once loosened. Air monitors detected elevated concentrations of hydrogen cyanide gas following the opening of these drums. EPA contract workers handling EPA contractors collect sample of wood vinegar from tanker truck prior to shipment off-site. Totes for of wood vinegar and wood tar staged for decanting.