Editor's Note: For ongoing coverage of the BP blast, visit the Houston Chronicle's Special Report, Texas City Explosion.
A 67-foot hole in a benzene storage tank caused by the Texas City BP
refinery explosion has left the air too tainted for investigators to
enter, delaying a probe of the blast site, officials say.
A week after the explosion in the refinery's octane-enhancing unit
killed 15 workers and injured more than 100, investigators with the
U.S. Chemical Safety and Hazard Investigation Board are unable to get
an up-close look because they don't have the training or equipment to
enter the area until an all-clear is sounded, said board spokesman
A zone around the affected tank, which at the time of the blast was
holding 525,000 gallons of benzene, is off-limits except for workers
wearing respirators or oxygen masks. The leaking benzene tank is almost
300 yards from the unit that exploded last Wednesday.
"It is emitting benzene vapors on an ongoing basis, at a level that
would be a health concern," Horowitz said. "The type of respirators our
people carry are not able to cope with this amount safely."
BP was erecting scaffolding near the tank to blanket the destroyed
roof with a foam. That will reduce the emissions, which are being
caused by benzene pooling on the collapsed roof and then vaporizing
into the surrounding air.
"We treat benzene very seriously," said Bill Stephens, a BP
spokesman. "We are just not going to do anything that is going to put
any investigator at risk."
Stephens said addressing the problem was made more complicated by a court order to not disturb evidence at the scene.
Most, if not all, of the 15 workers who died appeared to be working on a unit not involved in the blast.
BP spokeswoman Marti Grazzier said the 11 JE Merit employees who
died were preparing to work on another unit near the isomerization
unit. A spokesman for Fluor said the three workers from that company
who died were quality control inspectors who had worked on the unit in
the past but were not working on it at the time of the explosion.
Delay not unusual
It's not yet clear if the final worker, a
contractor from General Electric Energy, was involved in the
maintenance of the unit that exploded. A spokeswoman for the company
would only confirm that the company had a fatality at the plant due to
CSB's Horowitz said it's not unusual for investigators to be delayed
for a number of days from entering a blast site. It sometimes takes
weeks for accident sites to be safe enough for further investigation
because of hazardous chemicals and unstable structures in the area, he
In addition to the benzene concerns at the Texas City site, there
were lingering concerns over how structurally sound parts of the unit
are, Horowitz explained.
Still, investigators were busy conducting interviews with witnesses
and reviewing data collected by the plants' computerized monitoring
system. On Tuesday they conducted 18 interviews, and they hope to keep
up the pace, eventually compiling scores of eyewitness accounts.
They will send a photographer into surrounding neighborhoods today to document damage to other structures.
Tests conducted by the U.S. Environmental Protection Agency and by
the company around the benzene tank over the weekend and on Tuesday
detected concentrations of benzene - a natural ingredient of oil and a
carcinogen - slightly above the standard set for the workplace, EPA
However, winds on Tuesday were blowing some of the fumes toward the
isomerization unit, which lies almost 300 yards from the tank.
The isomerization unit produces components used to raise the octane content of gasoline.
Aerial photographs of the damaged structure, known as Tank 108, show
a dark hole edged with jagged metal, as if the tank's top had been torn
away with a giant can opener.
Karen McCormick, lead on-site coordinator for the EPA, said either
debris or a pressure wave from the explosion caused the roof collapse.
Normally, the roof on a tank would prevent health-damaging vapors from
escaping if another roof below were leaking.
BP tried to empty tank
BP had tried unsuccessfully to empty
the tank, draining it only of 35,000 gallons, before the floating roof
- which sits on top of the liquid chemical but beneath the crushed dome
- appeared to be working improperly. There's enough benzene in the tank
to make the liquid 11 feet deep, the statement said.
"The blast was very extreme to where things were crushed and car windows crashed," McCormick said.
She said the leak was detected Friday, after BP's contractor, Garner
Environmental Services Inc., got some "hits" in the tank's vicinity.
EPA officials, whose focus up until that point was on air quality outside of the plant's fence, then moved in to help.
"We felt very confident it was that tank itself and it was not going
to cause any off-site impacts to public health," McCormick said. "We
started narrowing our focus onto those tanks and other problems with
the tanks' integrity."
Her team and state investigators who were monitoring air quality
left the plant site Sunday. Their job now will focus on whether any
environmental laws are being broken.
''From here on out our job is to look at any kind of violations and
enforcement action," said Adria Dawidczik, a Texas Commission on
Environmental Quality spokeswoman.
BP officials, in a report filed with the state Friday, estimated
that the pooling of benzene was releasing 20 pounds of benzene per day
into the air. The company is permitted to release .58 pounds per day,
however, BP officials said the emissions were so small they no longer
had to report them to the state.
While the company is permitted to release .58 pounds per day, BP
officials said emissions were so small they no longer had to report
them to the state.
BP spokesman Hugh Depland said 10 people remained hospitalized
Tuesday. He said five were still in very serious condition in intensive
care units. The other five were in less serious condition.
Meanwhile, hundreds of mourners paid their respects at services for
the victims on Tuesday. Funerals were conducted for Lorena Cruz, 32, of
La Porte; Ryan Rodriguez, 28, of Baytown; Glenn Bolton, 50, of College
Station; and Eugene White, 53, of North Carolina.
Services are scheduled today for Larry Thomas, 63, of Huffman;
Arthur Ramos, 59, of Houston; Linda Rowe, 47, of Hornbeck, La.; and
James Rowe, 48, of Hornbeck, La.
Chronicle reporter Cindy Horswell contributed to this story.
- 107 Energy
- 182 Health