Quality Spring

The absolute best kind of spring. The envy of any spring collection!

Farming
You can find one quality spring in lab of horrors mission colonel rank. Go through hole in wall head, left through two doors, then down, to the middle door right side of the tall room. Call golden gate for dynamite and its the first chest there (up on the catwalk). It's about a 1min run - you can gather it pretty quick.