"nrp" wrote in message
oups.com...
A couple of points:

1) My copy of ASTM spec D910 page 0539 states that the allowable TEL
content of 100LL avgas is 2 milliliters per gallon NOT 2 grams per
gallon. This means there will be over 1/3rd pound of lead in an 80
gallon tank of 100LL, plus about 1/5th pound of ethlylene dibromide
scavenging agent.

Aside from the curiousity of mixing gallons and metric measurments, 2
gr/gallon is 160 grams in an 80 gallon tank. 160/454=0.3524 lbs, so it's
virtually the same thing. SAW, 160 gr in a tank that holds 36,320 grams, 1/3
lb in a tank holding 480 lbs.