VOC sampling locations table for Ground Zero area, Jan 2002

NYC 9/11 Public Portal Document

Figure 5. Particle types found in the WTC3 sample used in the nose-only inhalation exposure (Experiment B). A. Example of Ca-S particle which was prominent in the sample. B. Example of Ca particle which was prominent in the sample.

also containing Si. Some representative particles are or more possible asbestos fibers (Mg-Si composition) were shown in Figures 5A and 5B. In contrast to the crystals also found, however polarized light microscopy rather than and aggregates of the bulk solid samples as described SEM/EDX is the preferred method for identifying above and shown in Figure 4, the particles of WTC3 are asbestos. SEM/EDX analysis was also performed on small, typically about 1 (im, with rough, irregular features. MSH, NIST 1649a, and ROFA and showed results The different form of the Ca-based particles in WTC3 typically found in previous analyses (data not shown). reflects the dry size segregation of the inhalation exposure 6. Summary. WTC PM samples consist primarily of system. Particles with other compositions were found construction materials from the fallen-down WTC with far less frequency. These included particles buildings. The bulk of the WTC PM samples are calcium- composed of Fe, C, and Sb-Zn (one example found). One based compounds, specifically calcium sulfate (gypsum)

Table 6. Experiment A: Body Weights and Immediate Airway Responses. ° Group B.WtdO B.Wt. d 1 Breathing Frequency fmin''') PenH funitlessi g g Pre- Post- % increase Pre- Post;. % increase Saline 25.8 24.9 492.3 348.1 -29.7 0.73 0.96 23.9 0.4 0.4 11.5 25.6 4.2 0.08 0.17 8.3 MSH-100 25.5 25.0 474.0 320.6 -31.7 0.92 1.25 40.5 0.4 0.3 13.5 23.0 5.2 0.13 0.18 14.8 ROFA-10 25.6 24.3 492.0 343.5 -29.7 0.74 1.05 423 0.4 0.6 14.3 18.6 4.1 0.11 0.17 13.5 ROFA-100 25.2 25.2 461.0 307.0 -33.4 0.88 1.51 0.5 0.4 11.9 18.7 3.7 0.10 0.20 -ILL I WTCX-10 25.2 24.3 467.2 322.4 -31.1 0.85 1.14 52.4 0.6 0.5 14.7 22.5 4.1 0.15 0.18 21.8 WTCX-31.6 253 24.7 476.8 348.5 -26.3 0.86 1.14 26.8 0.5 0.5 15.5 18.9 4.3 0.18 0.34 15.6 WTCX-100 25.6 25.1 486.8 325.3 -33.1 0.79 1.11 40.7 0.6 0.4 14.1 26.6 5.1 0.08 0.16 11.8 " Values shown are means (in bold) and SEM immediately below means (n= 12 per group). Body weight (B. Wt.) was measured in the morning. Respiratory parameters were measured immediately before (Pre-) and after (Post-) orophaiyngeal aspiration ofdust samples or saline on day 0. Values within solid-line boxes indicate significantly greater values in ROFA-100 mice vs. Saline mice (P < 0.05).

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NYC-WTC_000149161