Before 1980, there was very little historical archaeology going on in CA. The emphasis was on pre-contact Indian cultures. I remember sires where earth was taken down to about 18' below street grade and the bottom 3' of many privy pits were exposed and left that way for weeks. That allowed us to get into the site area and dig the remainder out. It was OP gravy and we did not have to worry about filling or leaving a mess. Clean out the glass and go. Lots of black glass Hostetter's, Schnappers, and sodas, both Western and Eastern. The best Eastern one that I can recall was a cherry puce Boardman's. Lots'a leaverites like Burgin and Sons, cheezy Parker's and others, but many boxes of major keepers. Not an archy to be seen; they didn't get on the historical bandwagon until several years later. One prick of an A-hole was Adrian Pritz-Ellis, a Sonoma State College professor who really was convinced that his poop was lovely.