Cap'n Jack
Final Approach
Tom- I'd say you don't have much of a clue either.
The author did state where he got the numbers- probably from a report like this:
http://www.epa.gov/otaq/regs/nonroad/aviation/420r08020.pdf although he should have referenced the report (edited out?)
I agree that there are problems with the report (I at least glanced at it instead of simply making bombastic comments). Notably, they used the maximum of TEL in engines as their basis for lead, as Henning did. Most producers have been using a lower concentration for some time. They seem to make some sort of estimate for lead left in the engine.
The report is from 2008- I don't know if there was a newer report available. I suspect there is, since the report I cite lists Boeing field as having 0.7 tons/year lead but the report cited in post 1 lists 0.5 tons. Any sensationalist news reporter worth their salt would round up 0.7 tons to be one ton. The reduced value for lead is consistent with people flying less as Tom states.
