Andre tekniske undersøgelser

Efter terrorangrebet den 11. september 2001 iværksatte American Society of Civil Engineers en undersøgelse af den beskadigede Pentagon bygning, og foreslå forbedringsforslag.

Det internationale ingeniørfirma Buro Happold udførte i februar 2000 en undersøgelse af brandsikringen i World Trade Center 1 og 2.

World Trade Center fine particulate matter–chemistry and toxic respiratory effects: an overview.,
Stephen H Gavett

Chemical analysis of World Trade Center fine particulate matter for use in toxicologic assessment,
John K McGee, Lung Chi Chen, Mitchell D Cohen, Glen R Chee, Colette M Prophete, Najwa Haykal-Coates, Shirley J Wasson, Teri L Conner, Daniel L Costa, and Stephen H Gavett

Lawrence Berkeley National Laboratory undersøgte vandforekomster på Ground Zero, og fandt meget små forekomster af tritium, langt under hvad der anses for at være skadeligt for mennesker.

• outdoor air, outdoor bulk dust, indoor air, and indoor dust wipes specifically in response to the disaster by the USEPA and NYSDEC; approximately 200 parameters are present, including particulate matter mass (PM2.5, PM10), volatile organic compounds (VOCs), dioxins, polychlorinated biphenyls (PCBs), metals, and asbestos.
• air quality data reported to EPA’s Aerometric Information Retrieval System (AIRS) data repository from fixed-site air quality monitoring stations run by local, state and federal environmental agencies from 1970 to December 31, 2004. These include ozone, sulfur dioxide, nitrogen dioxide, carbon monoxide, lead, particulate matter mass (TSP, PM10, PM2.5) plus parameters measured on an irregular basis which include a suite of volatile organic compounds (VOCs), dioxins, polychlorinated biphenyls (PCBs), particle-associated metals, and limited meteorological data.

0. Preface
   Eduardo Kausel, PDF (15KB)
1. A brief history of the WTC Towers
   John E. Fernandez, PDF (32KB)
2. Inferno at the World Trade Center, NY
   Eduardo Kausel, PDF (19KB)
3. Speed of aircraft
   Eduardo Kausel, PDF (856KB)
4. Aircraft impact damage
   Tomasz Wierzbicki, Liang Xue, Meg Hendry-Brogan, PDF (5911KB)
5. The fires
   Ahmed F. Ghoniem, PDF (537KB)
6. Materials and structures
   Oral Buyukozturk, Franz-Josef Ulm, PDF (1442KB)
7. Escaping with your life
   John E. Fernandez, PDF (937KB)
8. Supply chains and terrorism
   Yossi Sheffi, PDF (80KB)
9. The Reflecting Wall at MIT
   PDF (144KB)

Efter terrorangrebet undersøgte MCEER skaderne på bygningerne ved Ground Zero, og publicerede flere rapporter herom.

• Overview of Damage to Buildings near Ground Zero
• Reconnaissance and Preliminary Assessment of a Damaged Building Near Ground Zero
• Emergency Response in the Wake of the World Trade Center Attack: The Remote Sensing Perspective

• Property Condition Assessment Of World Trade Center Portfolio – One World Trade Center – Merritt & Harris Inc. – 12/06/00 (39 pages)
• Due Diligence Check List of Documents (30 pages)
• Elevator Modernization – Summary of Scope of Work (42 pages)
• Attachments (34 pages)
• Building One Theoretical Traffic Analysis (35 pages)
• Attachment 8 (16 pages)
• RF Safety Awaremess for World Trade Center Workers (41 pages)
• Appendix A-3, Denny & Associates, P.C., Engineering Report (22 pages)
• Engineering Report, Electromagnetic Field Strength Survey at the South Tower of the World Trade Center (29 pages)
• Appendix A-4, U.S. Federal Communications Commission, Antenna Structure Registration (10 pages)
• An Evaluation of the Radiofrequency Environment at the World Trade Center North Tower, Richard Tell Associates, Inc. (26 pages)
• Radiofrequency Fields at the World Trade Center, Figures (31 pages)
• Appendix A-7, Additional RF Report, September 5, 1999 (13 pages)
• Appendix A-9, An Investigation of RF Safety Considerations on the WTC Antenna Mast Relevant to Work to Install a New Digital Television Antenna, Richard Tell Associates, Inc. (24 pages)
• WTC DTV Antenna Work and RF Safety Considerations (15 pages)
• Appendix A-10, Memorandum 7/28/2000, Regarding Radiation Safety Survey One WTC (11 pages)
• Curtin Wall Observation Report (18 pages)

Report 2

• Property Condition Assessment Of World Trade Center Portfolio – Two World Trade Center – Merritt & Harris Inc. – 12/06/00 (31 pages)
• Neighborhood Map (32 pages)
• Proposed 2001 Capital Plan (23 pages)
• Existing Property Descriptions and Conditions (33 pages)
• Existing Property Descriptions and Conditions (23 pages)
• Site Orientation Map (19 pages)
• Crandlemere and Associates Asbestos Containing Materials (19 pages)
• Elevator Shaft Asbestos Assessment (15 pages)
• Attachment 8, Crandlemere and Associates Roof Mounted Transmission Devices, Document Review & Evaluation (12 pages)
• Engineering Report, Electromagnetic Field Strength Study, Denny & Associates (18 pages)
• Engineering Report, Electromagnetic Field Strength Study at the South Tower of the World Trade Center (17 pages)
• Comparison of Measured and Calculated Exposure Data (12 pages)
• Appendix B (25 pages)

James Millette, MVA Scientific Consultants, har lavet en uafhængig undersøgelse af støvprøver fra WTC som en replikation af Harrits eksperimenter i nanorapporten. Millette kommer frem til at der ikke er termitisk materiale i støvet.

130 Liberty Street Property
Report Date: December 2003
WTC Dust Signature Report
Composition and Morphology

Miljøundersøgelse af støv fra 130 Liberty Street, også kendt som “Deutsche Bank” og “Bankers Trust Plaza”. Bygningen lå umiddelbart syd for World Trade Center 2.

130 Liberty Street Property
Report Date: May 2004
Expert Report
WTC Dust Signature

En mere detaljeret miljøundersøgelse af støv fra 130 Liberty Street, også kendt som “Deutsche Bank” og “Bankers Trust Plaza”. Bygningen lå umiddelbart syd for World Trade Center 2.

Kemisk sammensætning af den grunder (maling) der blev brugt til at beskytte stålet, under opførelse af World Trade Center 1 og 2.

• Executive Summary
• Introduction
  • Asbestos Definitions.
• Imaging Spectroscopy Mapping Results
  • Field spectral measurements and calibration site.
  • Thermal Hot Spot Maps: Sept 16 and 23, 2001
  • Asbestiform Minerals Map
  • Dust and Debris Plume Map
  • Ferrous and Ferric-Bearing Materials Map
  • Clays and other Materials Map
  • Organic Compounds Map
  • Water Sediment Map
• Sample Collection in the WTC Area
• Laboratory Studies of Samples
  • Overview
  • X-Ray Diffraction (XRD) Analysis
  • Laboratory Reflectance Spectroscopy (RS) Studies
    • Reflectance Spectroscopy
      • Laboratory Spectra of WTC Samples
    • Description of Spectroscopy Methods and Results
    • Possible Sources of Abestos in the WTC Dust
    • Spectral Detectability of Chrysotile
    • Spectral Interference
  • Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Analysis (EDS)
  • Chemical Compositions
    • Sampling and analytical methods
      • Chemistry Table 1,
    • Results
    • Interpretation
  • Leachate Studies
    • Leaching of World Trade Center dusts using a simulated precipitation leaching procedure
    • Results
      • Leach Table 1
    • Interpretation
    • Summary and potential environmental implications
• Integration of Results and Conclusions
• References

Supplerende undersøgelser

• Determination of a Diagnostic Signature for World Trade Center Dust using Scanning Electron Microscopy Point Counting Techniques,
  Gregory P. Meeker, Amy M. Bern, Heather A. Lowers, and Isabelle K. Brownfield
• Spectroscopic and X-Ray Diffraction Analyses of Asbestos in the World Trade Center Dust, Asbestos Content of the Settled Dust
  G.A. Swayze, R.N. Clark, S.J. Sutley, T.M. Hoefen, G.S. Plumlee, G.P. Meeker, I.K. Brownfield, K.E. Livo, and L.C. Morath
  U. S. Geological Survey, Denver, Colorado

Avisen The Washington Post har samlet en database over navnene på ofrene for terrorangrebet den 11. september 2001.