All meters, pumps, lines, and devices which have been used in measuring and pumping gasoline must be thoroughly cleaned before being used in measuring and pumping high flash petroleum products, such as kerosene, heating oil and diesel fuel.
Ga. Comp. R. & Regs. R. 40-20-1-.08
O.C.G.A. Secs. 10-1-151, 10-1-155.