The EPA-foam issue has cropped up again on talk radio. (sigh) Let me
know if I'm close to the following facts here.

0) At some time in the 1990s EPA policy called for the end of the use of
freon in processes that affected the ET foam insulation.

1) There was a period in the mid-late 1990s when ET insulation was
applied with a mix of old and new methods. Old school foam used in what
were deemed most critical areas and the new freon-free foam in other areas.

2) Later analysis showed that both areas continued to suffer from foam
loss. (What kind, and how much?)

Columbia's ET was old or new type?

Thank you. I'm trying to educate myself here. Researching this topic has
been a mess on google. I've gotten people blaming/crediting the EPA
going all the way back to Challenger O-ring putty. I've even gotten a
WTF??!! whiff of an EPA-FDA-EPHEDRA-FREON DIABOLICAL CONSPIRACY!!! AIEEEE!


--
It Came From C. L. Smith's Unclaimed Mysteries.
http://www.unclaimedmysteries.net

Of course I went to law school. - Warren Zevon, "Mr. Bad Example"