Nope, there couldn't be a pit cleanup job at the end of the "Golden Pepperoni" temple run. The Golden Pepperoni episode was filmed first in its day, and the "Milk Bucket" episode was second to last of its day, (like you said). If it really were Tarrah that threw up in the pit, that incident would have occured way after the "Golden Pepperoni" temple run. Why those people were in the pit after the run, I have no idea. Besides, if the "Milk Bucket" were to be filmed just before "Golden Pepperoni," they would have cleaned the pit a long time ago. (don't get me wrong, I know the order of episodes, I'm just saying).
I'm still 100% convinced it was Christina from, "Secret Battle Plan of Nathan Hale." that editing in the pit while Tarrah was in the temple was probably just some bad editing.