Turian Salvage
Talk to Drusa in the Turian camp on Havarl, after you've driven off the bandits. She'll task you with tagging wreckage from their ship.
There are nine spots to tag- six at ground level and three in the chasm. Because enemies respawn (constantly), try to integrate this with the main Havarl questline (helping the scientists then ascending Mithrava).
Actually tagging the pieces is simple- they're all pretty large, so just point and scan.
Note that each piece of wreckage has a container with it as well. The container itself tends to be all but buried, so just search the center of the wreckage to find it.