Hi i'm a college student working my way through college with a hydro blasting company called Mussop. I just got back in from my third crude oil tank. We've got 31 more to clean for lion oil. the crude oil sludge can be up to 4 foot deep in these tanks and sticks to the vaccum hose ur using. Which makes the hose heavy to pick up. I ruined 3 sets of uniforms on this last one. That is going through a slicker suit and a tyvex. If u care to try one of these just let me know we got plenty more coming up. I know my supervisor Marcus is sent in some pictures. Thanks for reading this message and I hope u consider coming. later