Ha why is this thread still alive. We didn't get much keepers from these spots either, but thanks for the locales.
And 3rd and army from the east bay is as follows:
Take the BART to SF. Get off at the embarcadero. Go to the muni train level (Go up the stairs to the main level from bart, enter the muni from there). Take the T going outbound, or towards sunnydale. Get off at Marin St, and cross the street of the direction you had been going (should be a big red building). Continue to the south to the bridge and there should be a hole in the fence lining this red building. 3rd and army is right there. If you can't get around the fence somehow, you should still be able to see the spot behind the fence, just go back past the muni stop a bit to the first street and go down that and take the first left and there you go.
Sorry for the long as shit response, if you can't find it after such detail I've provided, I'm sorry.