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Message: <blockquote data-quote="UserNameRequired" data-source="post: 938977" data-attributes="member: 29865">Yes with the benzene and toluene xylene at likely much higher concentrations than the lead, nasty stuff!  I would assume the authorities on the scene are experienced at dealing with a spill like this.  My daughter is LE and she says they call the fire department to come clean up the mess.  The fire department has training for this.  It could be around 50 gallons to deal with depending on which tank size this 172 had, so typically I could see this like a bad two car collision.  The FAA has been so slow to certify a 100 unleaded, it is frustrating.  There is a candidate now called G100UL that should be a full replacement for 100LL avgas for the fleet, but it may be later in 2022 for full certification and possibly 2023? for a full availability.edit: I talked to my firefighter friend, he notes if the spill is small, they use oil-dri on it, and then scoop it up after it drys.  Then they dispose of the oil-dri in a proper manner, hazmat to the landfill.  If it is really bad like a tanker or something, they call in a commercial cleanup company.  They are very conscious of a spill into surface water, like on a bridge!  If the spill is big enough there may be EPA forms that need filled out.</blockquote>

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