Gas station pumps and underground storage tanks are not yet UL certified to handle E-85. (Photo by Lester Graham)
With thousands of flex-fuel vehicles hitting the road, gas stations are adding E-85 to
their fuels. E-85 is 85 percent ethanol and 15 percent gasoline. But, as Lester
Graham reports, storing and pumping E-85 fuel is a major concern because, so far,
no equipment has been certified as safe to handle it:
Transcript
With thousands of flex-fuel vehicles hitting the road, gas stations are adding E-85 to
their fuels. E-85 is 85 percent ethanol and 15 percent gasoline. But, as Lester
Graham reports, storing and pumping E-85 fuel is a major concern because, so far,
no equipment has been certified as safe to handle it:
The Department of Energy’s Handbook for Handling, Storing, and Dispensing E-85
warns, “certain materials commonly used with gasoline are totally incompatible with
alcohols.” Other government guidelines give detailed instructions about storing E-85
in underground storage tanks and the pumps people use to fill their vehicles. But,
with more and more filling stations adding E-85 pumps, not everyone is following the
instructions and warnings.
Brad Hoffman is with the nation’s largest underground storage tank service
company, Tanknology. The company inspects gas station distribution systems:
“I think they pretty much just took for granted that their tank could store whatever
fuel they put into it and they didn’t really check the compatibility of the tank and the
other piping and dispensing equipment. They didn’t really confirm that it was
compatible with the E-85 that was being delivered.”
And some of the fiberglass underground storage tanks are not compatible. Ethanol
can soften the polymers in certain tanks. That can make them weaker and might
cause them to leak. There’s also concern that leak detection equipment might also
be damaged by ethanol. So if a tank is leaking, it might go undetected. And it’s not
just the tanks. There are questions about compatibility with the pumps filling flex-fuel
vehicles.
The ethanol industry says there have been no major problems with tanks or pumps
so far. Matt Hartwig is with the Renewable Fuels Association:
“Most gas station operators will use tanks that are appropriate. They will clean the
tanks. They would do the proper maintenance and the proper preparation required
to install E-85 infrastructure. Because of the nature of ethanol, you do need a
dedicated tank and pump system to dispense the fuel. I don’t think consumers and
the American driver have anything to fear.”
But fuel tank and gas pump inspectors are not as sure. Brad Hoffman with
Tanknology says government guidelines give checklists of recommendations on how
to prepare tanks and pumping systems:
“Being realistic, I think there’s a chance that some marketers may, you know, for
whatever reason, may not thoroughly check each of those items. And there could be
some problems, either with the tanks or the dispensing systems.”
Problems that could cause leaks.
Underwriters Laboratories is the safety testing organization that certifies the safety of equipment storing and pumping fuels. John Drengenberg is with
UL. He says it was only last year that a manufacturer asked for requirements for equipment handling E-85. Drengenberg says old gasoline equipment might not
be safe to pump E-85:
“The alcohol is different in that it’s much more corrosive. We know for a fact that
alcohol will attack soft metals, in particular aluminum and copper, things of that type,
and even plastics. So, therefore, what worked for gasoline dispensers, may not work
for ethanol dispensers.”
Drengenberg says gaskets, seals, and o-rings in the pump, hose or handle could
deteriorate and mean leaking fuel at the pump:
“With this type of fuel, ethanol, we’re mostly worried about fire hazards. If there is a
leak – let’s say for some reason ethanol attacked a gasket or a seal on a dispenser,
you could have a fuel leak – the fuel leak could be very dangerous in that any spark
could set it off. You could have a fire or possibly an explosion. So, that is the
concern that we have, certainly. And that is why we’re developing requirements for
these ethanol dispensers.”
UL expects to issue requirements for equipment by the end of the year. In the
meantime, whether the tanks and pumps offering E-85 at your gas station are safe is
up to the judgment of the local fire chief, fire marshal, or other local official.
For the Environment Report, this is Lester Graham.