T - Behind the two T-ENG tanks near the beginning where all the Akrid are, just before the parking garage area.

A - To the left behind the small container things before the warehouse with the Chryatis.

R - This is inside the warehouse on one of the catwalks, to the right of the exit.

E - This is at the bottom of the first area in the Akrid hive place. It will be at the bottom of the waterfall type thing. (Note if you get the H first it is just below the H pretty much.)

H - Just after you drop off the walkway, if you turn around it will be right behind you.