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Context of 'September 12, 2001: New York Hires Engineers to Examine WTC SIte'

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The City of New York hires LZA Associates and Thornton-Tomasetti Engineers to put together a team of engineers and contractors to inspect the World Trade Center and surrounding structures in order to help ensure the safety of rescue workers. [Civil Engineering, 11/2001]

Entity Tags: Thornton-Tomasetti Engineers, LZA Associates

Timeline Tags: Environmental Impact of 9/11

A structural engineer who was a member of the team assembled by the American Society of Civil Engineers to investigate the World Trade Center site after 9/11 complains about the decision to rapidly destroy the remaining structural steel from the collapsed WTC buildings. Dr. Abolhassan Astaneh-Asl is a professor of civil and environmental engineering at the University of California at Berkeley, and specializes in studying structural damage done by earthquakes and terrorist bombings. [Chronicle of Higher Education, 12/7/2001; CBS News, 3/11/2002; Associated Press, 9/6/2002] He had come to New York a week after 9/11 to examine the collapsed towers, hoping to gain an understanding of how they had come down (see September 19-October 2001). [New York Times, 10/2/2001; US Congress. House. Committee on Science, 3/6/2002] However, New York City officials had decided early on to quickly transport the remaining structural steel to scrap yards, to be shipped abroad and melted down for reuse (see Shortly After September 11, 2001). As CBS News now reports, “As a result, Astaneh has almost certainly missed seeing crucial pieces before they were cut up and sent overseas.” Astaneh-Asl complains: “When there is a car accident and two people are killed, you keep the car until the trial is over. If a plane crashes, not only do you keep the plane, but you assemble all the pieces, take it to a hangar, and put it together. That’s only for 200, 300 people, when they die. In this case you had 3,000 people dead.” He says: “My wish was that we had spent whatever it takes, maybe $50 million, $100 million, and maybe two years, get all this steel, carry it to a lot. Instead of recycling it, put it horizontally, and assemble it. You have maybe 200 engineers, not just myself running around trying to figure out what’s going on. After all, this is a crime scene and you have to figure out exactly what happened for this crime, and learn from it.” However, he adds, “My wish is not what happens.” [CBS News, 3/12/2002] Astaneh-Asl previously told the New York Times that the scrap steel from the WTC was “worth only a few million dollars, a tiny fraction of the billions of dollars the cleanup will cost.” Yet the knowledge that could be gained from it “could save lives in a future disaster.” [New York Times, 10/2/2001]

Entity Tags: World Trade Center, Abolhassan Astaneh-Asl

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The EPA’s regional office in New York announces that the agency will assume responsibility for testing and cleaning residences south of Canal, Allen, and Pike Streets in Manhattan for asbestos contamination—if requested by the resident. The EPA claims the decision was made in order to calm residents’ fears, and that decontamination is not necessary. “While the scientific data about any immediate health risks from indoor air is very reassuring, people should not have to live with uncertainty about their futures,” says Jane Kenny, EPA regional administrator. “There is no emergency here.” [Wall Street Journal, 5/9/2002 pdf file; New York Daily News, 5/9/2002 pdf file] Similarly, Mary Mears, spokeswoman for Region II of the EPA, states, “This is to assuage concerns from residents in Lower Manhattan who continue to have concerns over air in their apartments.” [United Press International, 5/9/2002]
Criticisms of the EPA's volunteer cleanup program -
bullet The EPA does not include other areas like Brooklyn, which was in the direct path of the September 11 smoke plume (see September 12, 2001), or Chinatown, whose residents have also complained of ailments they attribute to WTC contamination. [New York Daily News, 5/20/2002 pdf file; Jenkins, 7/4/2003 pdf file]
bullet The EPA does not acknowledge that there is a public health emergency
bullet The program is voluntary.
bullet The EPA program targets asbestos, although the agency will also randomly test for other toxins to determine if additional measures should be taken. “We will test for asbestos in air. This is the substance of greatest concern, and air is the pathway of exposure. By cleaning up the dust, many other substances will also be removed,” an EPA public notice explains. [Environmental Protection Agency, 8/4/2003] However according to Cate Jenkins, “too few homes [are sampled] to have any statistical power to establish that these substances are not occurring elsewhere.” [Jenkins, 7/4/2003 pdf file] A panel of experts convened by the EPA in October will agree, and suggest that the EPA conduct tests for additional toxins (see Mid-October 2002).
bullet The program is limited to private residences. Office buildings, the common areas of apartment buildings, stores and restaurants are not eligible for the program. [New York Daily News, 10/29/2002]
bullet Only apartments which appear upon visual inspection to be contaminated will qualify for cleaning. [Salon, 8/15/2003]
bullet The plan does not require that all apartments in a building be evacuated and cleaned—just those whose residents have filed requests. Consequently, recontamination and cross-contamination will occur from ventilation systems connecting cleaned and uncleaned apartments and from dust tracked in on residents’ shoes and clothing. [Salon, 8/15/2003]

Entity Tags: Mary Mears, Jane Kenny, Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

A panel of experts convene for two days, at the request of the EPA, and make recommendations for the EPA’s indoor cleanup program (see May 8, 2002) in Manhattan. The panel suggests expanding the testing to “include a wider array of toxic contaminants;” lowering “the EPA’s proposed danger benchmarks to take into account more vulnerable populations, such as children;” and establishing “safety standards for both residential and commercial buildings in Lower Manhattan.” [New York Daily News, 10/29/2002]

Entity Tags: Environmental Protection Agency

Timeline Tags: Environmental Impact of 9/11

Matthys Levy.Matthys Levy. [Source: PBS]A report is made publicly available, which the Engineering News-Record calls the “most comprehensive study yet on the destruction of the World Trade Center.” The study was commissioned by WTC leaseholder Silverstein Properties Inc. to support a $7 billion insurance claim, and conducted by a team of engineers from several leading firms, including Weidlinger Associates, LZA Technology/Thornton-Tomasetti, and ARUPFire. It is intended to build on a previous study sponsored by FEMA (see May 1, 2002). The report’s findings are based on an analysis of original structural drawings, thousands of photos, and dozens of videos. Investigators used fire evaluation techniques and powerful computer software to simulate the condition of each tower at critical times between the planes’ impacts and the towers’ collapses. The earlier FEMA investigators had no access to such computer modeling. Matthys Levy, the chairman of Weidlinger Associates and one of the engineers on the study team, says, “The buildings had tremendous reserve capacity and that was reflected in all of the elements we analyzed. In fact, because there were so much excess capacity, the columns even in the impact floors did not buckle immediately, but failed as the result of the fire.” The report states that failure of the WTC’s steel floor supports (“trusses”) did not contribute to the collapses. Instead, the collapses were caused by the failure of steel structural columns that were either destroyed when the planes hit or lost fireproofing, leaving them vulnerable to the weakening effects of the ensuing fires. It says that debris and dust distributed by the plane crashes inhibited the fires, such that the average air temperatures on the impact floors were between 400 and 700°C (750-1,300°F): significantly lower than those associated with typical “fully developed” office fires. However, says Matthys Levy, “By the time the temperature inside the buildings reached 400 degrees, the steel would have lost approximately 50% of its strength. Eventually, gravity took over and the towers began to fall.” Then, according to the analysis led by researchers from LZA Technology/Thornton-Tomasetti, “Once collapse initiated in each tower, essentially all of the interior structure of the tower fell straight down with floors pancaking on top of one another. The network of perimeter steel columns and spandrels acted like a chute to funnel the interior contents into the tower footprint.” According to the computer simulations, the damage to the South Tower’s steel core columns was so severe that the tower should have collapsed immediately after the plane hit. Civil engineer John Osteraas says this incorrect result casts doubt upon some of the study’s predictions. The report concludes that the collapse of the South Tower did not cause or contribute to the subsequent collapse of the North Tower, thus supporting Silverstein Properties’ claim that the terrorist attack represented two occurrences, entitling it to two $3.5 billion insurance policy limits. A separate study commissioned by the insurers contradicts this (see October 23, 2002). The Silverstein report apparently does not examine the collapse of WTC Building 7, a 47-story skyscraper that also collapsed on 9/11 (see (5:20 p.m.) September 11, 2001). It has been passed on to the National Institute of Standards and Technology (NIST), which is undertaking its own investigation of the WTC collapses (see August 21, 2002). [New York Times, 9/30/2002; Business Insurance, 10/23/2002; Silverstein Properties, Inc., 10/23/2002 pdf file; Engineering News-Record, 10/25/2002; New York Times, 10/29/2002; Engineering News-Record, 11/4/2002; Real Estate Weekly, 4/30/2003]

Entity Tags: World Trade Center, Silverstein Properties, Thornton-Tomasetti Engineers, Weidlinger Associates, Matthys Levy

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Kathleen Callahan, an EPA assistant regional administrator, rejects the New York City firefighters union’s request to expand the EPA’s cleanup program (see May 8, 2002) for residential spaces in Lower Manhattan to four firehouses in Lower Manhattan. “We have not undertaken any cleanup of firehouses,” Callahan explains at an environmental symposium at Fordham University. “The program that we have is strictly residential and therefore, we would not do firehouses.” [Infinity Broadcasting Corp, 3/12/2003]

Entity Tags: Environmental Protection Agency, Kathleen Callahan

Timeline Tags: Environmental Impact of 9/11

Approximately 10,000 residents are now sheltering in the New Orleans Superdome. The Louisiana National Guard has delivered three truckloads of water and seven truckloads of MREs, which it expects is sufficient to provision 15,000 people for up to three days, according to Col. Jay Mayeaux, Deputy Director of Louisiana Homeland Security Office of Emergency Preparedness. [Times-Picayune Blog, 8/28/2005 Sources: Jay Mayeaux] More than 600 people with medical needs are housed at the dome. [Associated Press, 8/29/2005] Some 200-550 National Guard members are inside the Superdome providing security and water. Other Guard engineers will be in the dome to monitor the structural integrity of the facility. ( [MacCash and O.Byrne, 8/29/2005] reports 200 Guard members on duty; [Advocate (Baton Rouge), 9/9/2005] reports 400 Guard members on duty; and [Associated Press, 8/29/2005] reports 5500 Guard members on duty.
Note - Reports vary regarding the number of residents in the Superdome this evening. One contemporaneous report indicates that 26,000 people are sheltered there. [Times-Picayune Blog, 8/28/2005] A few hours from now, the same paper will report that the dome is sheltering more than 30,000 people. [Times-Picayune Blog, 8/29/2005] However, the next morning, the same paper will report that approximately 8,000-9,000 people are there, citing Doug Thornton, General Manager of the Superdome. [Associated Press, 8/29/2005 Sources: Doug Thornton] FEMA Director Michael Brown will tell National Public Radio tomorrow morning that 9,000-10,000 people are sheltered there. [National Public Radio, 8/29/2005 Sources: Michael D. Brown] See also, [ABC, 8/29/2005; CBS News, 8/29/2005] .

Entity Tags: Louisiana National Guard, New Orleans Superdome

Timeline Tags: Hurricane Katrina

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