In the new The Bomb DLC for Payday 2 there is an achievement for finding the meth lab in the Bomb: Dockyard.
I found the lab in a container on the ship, but where is it possible for the meth ingredients to spawn and how many sets can there be? Is the number tied to difficulty level?
I have found some in open boxes (same as the open boxes in the Hotline Miami meth room) spread randomly around the level. I expected to find some in crates, but haven't found any there yet. Can they spawn there? Can they spawn elsewhere?