Machshirin 4:6-7

Machshirin 4:6

If one put a basket of peas into a mikvah, he can reach in and take peas, and they remain insusceptible to ritual impurity. If he pulled the basket out of the water, the peas touching the basket are susceptible to ritual impurity and the rest are insusceptible. If a radish is in cave water, a menstruant woman can rinse it and it remains insusceptible to ritual impurity; if she lifts it out of the water even a little, it is rendered susceptible to impurity

Machshirin 4:7

If fruit fell into a canal of water and a person with ritually unclean hands reached in and removed it, both his hands and the produce are clean. If he intended to wash his hands in the canal, his hands are clean and ki yutan applies to the water on them.