diesel fuel will deteriorate over timeSludge and water will accumulate on the bottom of the tank, and rust can form on the sidesBacteria and fungus will grow in the fuel itself... FOPCO SERVICESWe first perform a test for bottom waterFuel samples are taken from the tank and routed to FOPCO's lab for further analysisDiesel Fuel TestingFOPCO is a leader in diesel... fuel oil testing. We utilize a standardized protocol for ensuring consistent, accurate and timely test results with personalized consultative follow-up.View FOPCO Fuel Testing...