The PlayStation 3 and Vita versions of this mission are related to a trophy named "Lost and Found", completing this mission will reward you with a silver trophy.
The last mission at the pumping station. Right away you'll encounter the new spyder gunner, a pretty durable metal head with a fast-firing medium range gun. It tends to notice you from far away and just keep shooting to keep you away from it, only to inch a little closer every time. It's a pretty easy target for the Blaster due to its size.
There'll be a couple more Metal Heads around (only juice goons and some more spyder gunners) if you head past the right and jump down onto the beach area where Sig's gun broke down last time. If you face the opposite direction you'll see three large machinery on the right that have created a new path up to the cliff plateau, so climb up there. Restock your ammunition from the large amount of crates here and fight a couple more metal heads. Approach the HellCat cruiser for a cutscene.
Metal head ambush! A large amount of goons and gunners will come jumping down the cliff, your new ally can handle herself pretty well as long as you do your part. Now is a great time to use Dark Jak which tears through the enemies much quicker, otherwise you can also rely on the Blaster's wastelander moves and the Scatter Gun which is useful in keeping them pushed back with its large hit area.