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Want to Add Ethanol at Your Station? |
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No modifications are required to add up to 10 percent ethanol to fuel tanks. However, retailers need to follow the checklist below to make certain that water is removed from the tanks before adding ethanol. Below is a checklist for cleaning tanks for E10 Unleaded fuel, or fuels blended with up to 10% ethanol. |
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E10 CHECKLIST: Cleaning Tanks for E10 Unleaded:
Service station underground storage tanks (USTs) are
subject to accumulations of water and/or sediment over time. It is
important to deal with these factors before introducing ethanol into your
retail fuel system. If the water is not removed from the system, the
solubility limit of water in gasoline may be exceeded, and it is possible
for the fuel to undergo phase separation. When phase separation in a tank
has occurred, the alcohol has essentially dropped out of the fuel and now
resides in the water bottoms layer of the tank. There is no “fix” for phase
separation. The tank’s contents including the top fuel and bottom
water/alcohol layers must be removed. Preparation:
¨ Clean out all product/water/sludge from the bottom of the tank.
¨ Then fill the UST as close to capacity as possible, to minimize the effect of any remaining moisture.
¨ It is recommended to change the filter at this point, and a couple of times throughout the first few days of usage.
¨ Water present at time of clean out indicates a problem and the source should be located and repaired to avoid future problems. |
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