Editor’s Note: This post was originally published in 2015 and has been updated for comprehensiveness.
With a fleet of 250 tanker
trucks—35 of which are used to haul soybean oil—one U.S.-based trucking company is dedicated to
thoroughly cleaning its large fleet following transportation jobs. The oil tankers can each haul
approximately 48,000 pounds of oil, so when cleaning the tanks, a significant amount of residual oil often
mixes with the wash water.
As is common practice in many municipalities, local regulations require the trucking company to...