I don't know much the rest that needed reinterpretation, but I'm all good for "St. Michael's Academy for Girls"
Meanwhile, "環境整備" Literally means = Environmental Maintenance, which makes 環境整備委員会 = Environmental Maintenance Committee
However, I have no better suggestion (just bringing this up, in here), I'm also good for "Campus Beautification Committee" even though it's slightly a bit far from the original meaning, but not too far.
Maybe if you can give us a list of the different names, we could all pitch in for this?