A Dangerous Worksite
The World Trade Center
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In the aftermath of the terrorist attacks against
our nation on September 11, 2001, thousands of
America’s workers responded by joining hands to
recover the remains of those who had been lost
and to reclaim the ground where the twin towers of
the World Trade Center once stood. Working around
the clock, under unimaginably dangerous conditions,
they endured and prevailed.
Out of the chaos emerged a strong and effective
public-private partnership that ensured protection for
the workers at the site. OSHA joined forces with the
City of New York, construction contractors, labor
unions, and all levels of government in a pledge to
recover the site with no further loss of life.
The partners achieved their goal. On May 30, 2002,
when the recovery was complete, not another life had
been lost, and illness and injury rates were far below
the national average for the industries involved in
the recovery.
John L. Henshaw
Assistant Secretary of Labor
for Occupational Safety and Health
U.S. Department of Labor
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THE GREEN LINE
A green line, painted around the perimeter of
the World Trade Center (WTC) site, defined
the recovery area. Within and around this
boundary, OSHA worked for 10 months with
its partners in safety and health to protect
the well-being of workers on the site. Within
that space, no workers lost their lives in the
recovery effort that followed the tragedy of
September 11, 2001.
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OSHA’S ROLE
OSHA’s strategy at the WTC was to pursue
collaboration while suspending enforcement and
providing consultation, guidance, and technical
assistance with a sound safety and health plan.
Our goal from the start was protection, not citation.
From the very beginning, OSHA knew that the
recovery of the WTC site would be no ordinary
demolition project. At the center stood a mountain
—all that remained of two skyscrapers that once
soared 110 stories high and defined the New York
City skyline for decades.
OSHA had addressed many of these hazards
before, but not on such a vast scale. No one
could deal with the catastrophe alone. No
one group had all of the answers, equipment,
experience—let alone the personnel—to protect
the safety and health of workers at the site. How
would they accomplish that goal? The answer
lay in partnership.
Informal collaboration of initial responders had
begun early. But soon, representatives from every
group involved in the recovery effort would formally
agree to join in a team effort to protect the safety
and health of workers at the disaster site.
Secretary of Labor Elaine Chao led the signing of
the formal partnership. Speaking at the ceremony
in New York City on November 20, 2001, Chao
declared, “American workers—from city, state, and
federal government agencies, trade associations,
contractors, and labor organizations—formed a
partnership to reclaim this site and recover our
fellow citizens. They’ve done this with pride, dignity,
talent, hard work, and dogged determination.”
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THE WORKERS
A flood of workers soon poured onto the site.
Here is a partial list:
- Asbestos Workers
- Boilermakers
- Carpenters
- Cement Masons
- Construction Managers
- Electricians
- Emergency Medical Technicians
- EPA employees
- FEMA workers
- Fire Fighters
- Heavy Equipment Operators
- Insulation Workers
- Ironworkers
- Laborers
- Machinists
- Medical Doctors and Coroners
- National Guard
- NIOSH employees
- Office Cleaners
- OSHA staff
- Paramedics
- Plumbers and Pipefitters
- Police Officers
- Psychologists
- Red Cross workers
- Registered Nurses
- Rescue Workers
- Riggers
- Safety and Health Professionals
- Sheet Metal Workers
- Steamfitters
- Steelworkers
- Structural Engineers
- Truckers and Teamsters
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PARTNERSHIPS
Signatories to the World Trade Center Emergency
Project Partnership Agreement:
- AMEC Construction Management, Inc.
- Bovis Lend Lease LMB, Inc.
- Building and Construction Trades Council of Greater New York (BCTC)
- Building Trades Employers’ Association (BTEA)
- Contractors Association of Greater New York (CAGNY)
- Fire Department of New York (FDNY)
- General Contractors Association (GCA)
- New York City Department of Design and Construction (DDC)
- Occupational Safety and Health Administration (OSHA)
- Tully Construction Company, Inc.
- Turner/Plaza Construction Joint Venture
IDENTIFYING RISKS AND HAZARDS
Many hazards threatened the safety and health of
site workers. They included risks caused by
cranes lifting beams of unknown weight and
improperly handled compressed gas cylinders that
might explode, as well as threats posed by falls
and falling objects, hot steel, confined spaces,
Freon, and much more.
A list of the most dangerous risks facing the WTC
recovery workers follows:
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Identifying Risks and Hazards:
CRANES
More than 30 cranes, including some of the
largest in the world, were at work in uncomfortably
close quarters inside the green line. In what has
been described as an intricate balance of motion
and timing, the cranes lifted loads of twisted steel
and compacted rubble in an environment fraught
with the potential for accidents. High winds, rain,
unstable ground, and uncertain loads added to
this dangerous mix.
OSHA saw the need for special focus to address
the growing concern over crane operations.
The agency consulted with various partners
and then launched a Joint Crane Inspection
Task Force. Composed of representatives from
OSHA, contractors, and the International Union of
Operating Engineers (IUOE), the task force spent
two days inspecting 17 cranes inside the green
line. They found numerous serious hazards on
more than half the cranes. Most of the hazards
involved crane set-up, rigging, and hoisting
practices. Crane set-up continued to be an issue
because the giant steel towers often rested on
unstable platforms as fires burning deep in the
pile caused the cranes to shift. The task force
identified hoisting personnel with man-baskets
as the most serious concern. For example, in
the early days of the recovery, workers modified
garbage dumpsters with welding torches, then
hooked them to cranes to lower workers into
the pile.
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The crane safety effort yielded further success
when inspection teams learned that faulty
equipment might be put back into service. The
task force inspected 222 pieces of rigging and
found 81 deficient in one sector of the site.
Employers in the other three sectors soon began
to remove suspect rigging before the task force
arrived. OSHA reported 151 safety interventions
involving crane operations, about 21 percent of
all hazard corrections made inside the green line.
The number of problems dropped consistently
after organization of the task force.
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Identifying Risks and Hazards:
HEAVY EQUIPMENT
The combination of rescue workers performing
recovery operations side by side with demolition
workers using heavy equipment in tight quarters
and under great emotional stress posed unique
challenges. Ordinarily, rescue workers are not
present when machines such as excavators,
grapplers, and debris trucks are operating. This
was not the case here. OSHA consulted with
construction personnel, labor representatives, and
emergency responders to find a simple solution
that made a big difference. The wearing of brightly
colored reflective vests made the workers visible
to the equipment operators and reduced the
potential for serious injury or even death. A
mandatory distance between rescue workers and
heavy equipment provided additional protection.
The sheer size and instability of the debris pile
posed further complications. The mountain of
mangled debris rose six stories above ground
and descended seven below; voids within caused
ever-changing shifts and constant hazards. With
heavy equipment operating on such unstable
surfaces, there was special cause for concern.
Yanking twisted steel from one spot could undermine
another and send an operator into a hole
several stories deep. Safety officials worried daily
about the potential for such falls. They kept a
close eye on the number of workers operating
heavy equipment and on their proximity to others
working on the pile. There were many “near misses,”
including an unattended crane that fell 30 feet
when the platform of rubble on which it sat gave
way. Constant vigilance—and in a few cases, fate
and good luck—averted near disaster.
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Identifying Risks and Hazards:
FALLS AND FALLING OBJECTS
Falls are routinely the most common cause of
workplace injuries in the United States. At the
WTC site, workers often had to operate several
stories above ground and in very uncertain
environments. The odds for disaster were great.
OSHA set up special training in fall prevention
methods and technology for the workers and their
supervisors to help them reduce or eliminate
the risks.
Meanwhile, the New York City Department of
Design and Construction (DDC) worked hard to
reduce the hazards of falling debris and structural
instability posed by the surrounding buildings.
They brought in contractors to secure the premises,
install vertical netting, and erect sidewalk sheds
and canopies to further protect the workers.
OSHA safety monitors and other safety
professionals constantly roved the site, identifying
and addressing hazards. Safety personnel often
interrupted an activity to ask that workers tie-off or
find a safer way to proceed. They also checked
scaffolding, performed job risk analysis, and made
sure workers understood safety rules for aerial
lifts. On one occasion, a load of debris fell directly
on a spot where firefighters had stood
only moments earlier.
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Identifying Risks and Hazards:
EXPLOSIONS
Numerous compressed gas cylinders used
by burners to cut steel beams and rebar were
scattered around the site. These cylinders included
oxygen and acetylene tanks, both extremely
hazardous if not handled properly. In the early
days of the rescue effort, these tanks were largely
unsecured, lying haphazardly on the ground. To
reduce this hazard, OSHA joined forces with the
Fire Department of New York to patrol the site and
ensure that contractors followed proper storage
and handling procedures.
The potential for explosions was always present
at the site. In one case, a fuel tank with tens of
thousands of gallons of diesel fuel was buried
seven stories below ground. With smoldering
fires, a rupture could have been disastrous. Once
workers located the tank, it was safely emptied,
and the fuel was removed from the site.
The parking garage under the WTC held nearly
2,000 automobiles, each tank holding an estimated
five gallons of gasoline. When recovery workers
reached the cars, they found that some had
exploded and burned while others remained intact.
Building 6, the former site of OSHA’s Manhattan
Area Office, housed many federal agencies,
including the U.S. Customs Service. More than
1.2 million rounds of their ammunition, plus explosives
and weapons, were stored in a third-floor
vault to support their firing range. OSHA worked
closely with other government agencies to determine
what protective measures were necessary
so that the ammunition could be safely removed.
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Identifying Risks and Hazards:
HOT STEEL
Even as the steel cooled, there was concern
that the girders had become so hot that they
could crumble when lifted by overhead cranes.
As a result, additional safeguards were put in
place to limit the dangers associated with lifting
the damaged steel and to protect the workers
in the vicinity.
Another danger involved the high temperature of
twisted steel pulled from the rubble. Underground
fires burned at temperatures up to 2,000 degrees.
As the huge cranes pulled steel beams from the
pile, safety experts worried about the effects of
the extreme heat on the crane rigging and the
hazards of contact with the hot steel. And they
were concerned that applying water to cool the
steel could cause a steam explosion that would
propel nearby objects with deadly force. Special
expertise was needed. OSHA called in structural
engineers from its national office to assess the
situation. They recommended a special handling
procedure, including the use of specialized rigging
and instruments to reduce the hazards.
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Identifying Risks and Hazards:
FREON
Huge underground tanks held more than 200,000
pounds of Freon stored to cool the seven buildings
of the WTC complex. This had been the largest
air-conditioning system in the country.
OSHA personnel were concerned that workers
entering areas below grade could be exposed to
Freon gas, a known, heavier-than-air, invisible
killer. After a leaking tank was discovered, agency
staff and the site construction manager carried out
special sampling for months until all the tanks
were uncovered and safely removed.
Identifying Risks and Hazards:
CONFINED SPACE
OSHA has investigated hundreds of cases of
carbon monoxide poisoning across the country.
Often this hazard is not immediately apparent,
and what may seem to be an open-air atmosphere
is really a more deadly confined space. Rescue
and recovery workers entered collapsed buildings
where the atmospheric hazards from fire and
toxic fumes could have been fatal.
Besides the usual hazards in confined spaces, the
site conditions at the WTC posed the additional
risk of structural instability. The DDC designated
certain areas for special attention. For example,
a sudden and catastrophic release of Freon could
overcome workers performing demolition and
recovery operations inside collapsed buildings.
OSHA helped DDC establish safe entry protocols
for these areas.
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LOOKING BACK
OSHA’s commitment to the WTC recovery
involved more than 1,000 agency employees
working 24 hours a day, seven days a week,
alongside other federal, state and local agencies
to ensure the safety and health of workers at the
site. At the height of this effort, 75 OSHA staff
worked the site each day and OSHA personnel
provided more than 15,000 work shifts.
OSHA
- Collected more than 6,500 air and bulk
samples to test for asbestos, lead, other
heavy metals, silica, and various organic and
inorganic compounds.
- Conducted more than 24,000 evaluations of
worker exposure.
- Conducted sampling around-the-clock.
- Distributed more than 131,000 respirators,
11,000 hard hats, 13,000 safety glasses and
goggles, and more than 21,000 pairs of
protective gloves.
- Identified more than 9,000 hazards.
After September 11, 2001, not one life was lost
inside the green line during the recovery effort.
LESSONS LEARNED
OSHA learned a great deal at the WTC site,
lessons that can help the agency improve its
own emergency preparedness while also helping
employers prepare for emergency response.
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EMPLOYER EMERGENCY EVACUATION PLANS
OSHA suggests that workplaces review and
practice their plans with an emphasis on the
following:
- Finding alternate exits.
- Accounting for all employees.
- Designating alternate rendezvous points.
- Developing procedures for the disabled.
EMERGENCY RESPONSE PARTNERSHIPS
Emergency response partnerships, with clear
lines of authority for all functions at a site and with
special emphasis on safety and health, should be
created immediately to promote effective disaster
site management.
In addition, OSHA recommends the following as
key elements for emergency response partnerships
to consider in planning for disasters:
EMERGENCY TRAINING
For first responders and federal law enforcement
agencies:
- Develop outreach and training materials.
- Address safety and health issues related to
incidents involving terrorism and weapons of
mass destruction.
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OUTREACH
Emergency responders, managers, and incident
commanders should:
- Plan for emergency responses.
- Ensure early and complete implementation of
the incident command system (ICS) and/or
Unified Command at all incidents.
- Designate safety officers with no collateral
duties and sufficient authority.
- Conduct comprehensive site risk assessments.
- Make safety and health protections a priority.
- Protect employees from job hazards.
- Install proper shoring.
- Pay attention to material handling equipment
and rigging.
- Monitor worksites for health risks.
- Consider environmental conditions, stress,
and fatigue.
- Control access to the site.
- Manage volunteers effectively.
- Manage donations, especially unsolicited
in-kind goods.
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FIT TESTING
Emergency responders at all levels of government
should be routinely fit-tested for respirators.
COMMUNICATION
- Improve channels of communication with other
local, state, and federal agencies.
- Improve emergency communication capability.
TRANSPORTATION
- Coordinate access to military transportation.
- Plan for emergency transportation.
THE FUTURE
OSHA continues to work with other federal
agencies across government to improve
cooperation and collaboration in the event that
a coordinated response on such a massive
scale is ever needed again. If the need arises,
OSHA will be ready.
OSHA 3193-11-03
Photography credit (listed from top to bottom):
1, Andrea Booher/FEMA;
2, Shawn Moore/DOL;
3, Andrea Booher/FEMA;
4, Andrea Booher/FEMA;
5, Andrea Booher/FEMA;
6 & 7, Andrea Booher/FEMA;
8 & 9, Michael Rieger/FEMA;
10 & 11, Andrea Booher/FEMA;
12 & 13, Andrea Booher/FEMA;
14, Shawn Moore/DOL;
15, Andrea Booher/FEMA;
16 & 17, Gil Gillen/OSHA.
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OSHA:
- Collected more than 6,500 air and bulk samples to test for asbestos, lead, other heavy
metals, silica, and various organic and inorganic compounds.
- Conducted more than 24,000 evaluations of worker exposure.
- Conducted sampling around-the-clock.
- Distributed more than 131,000 respirators, 11,000 hard hats, 13,000 safety glasses and
goggles, and more than 21,000 pairs of protective gloves.
- Identified more than 9,000 hazards.
After September 11, 2001, not one life was lost inside the green line
during the recovery effort.
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