In thinking about setting up my used oil to diesel conversion system I needed a place to store the 650 gallons of used oil that I have, and to have it located as close as possible to the conversion system.
T accomplish this I decided to add more of the red clay sand behind the Air cargo container then create a spillage mat to prevent minor spills from seeping into the ground.
After leveling the area with the clay sand I placed a double layer of 6 mil plastic on the ground then added a folded tarp on top of that. The mat is large enough to allow me to fold up all 4 sides then build a containment berm around it. I don't anticipate any major spills but past experience has shown me to plan for the worst and hope for the best. No matter how careful a person is there always seems to be some amount of spillage when dealing with oil.
Later on I will construct a roof over the barrels but for now a tarp will suffice