Tosefta על תרומות 4:11

Likewise, terumah is lifted up from within chullin at one hundred and one to one, whether it is mixed in or whether it is not mixed in. So too, impure [terumah] is lifted up from inside pure [terumah] at one hundred and one to one, whether it is mixed in or whether it is not mixed in. Rabbi Yosei says, when it is mixed in it does not get lifted up, and if it is not mixed in, it does get lifted up. [If terumah] fell inside impure chullin, all agree that it may be lifted up.

Terumah wine that fell on top of [chullin] wine, and so too terumah oil that fell onto fruits, he may wash them off and they are permitted, and so too [terumah oil that fell] on top of wine, he should let [the oil] coagulate [and then remove it] and the wine is permitted. [If terumah oil] fell onto brine, he lets it coagulate so that he can remove any brine that has the taste of oil in it.