VOC sampling locations table for Ground Zero area, Jan 2002

NYC 9/11 Public Portal Document

Table 4. Carbon fraction analysis of PM Samples in WTC2001 Table 5. XRD Analysis of Compounds Present in WTC 3 Study “ Sample “ Sample: WTC3 WTCX WTCB MSH ROFA NIST ICDD Formula Mineral Relative (pooled) SRM Number Name Amount 1649a % Carbon 05-0586 CaCOj Calcite Major Fraction: 33-0311 CaSO4-2H2O Gypsum Major Organic 6.88 0.93 2.11 0.06 1.31 10.82 Elemental 0.31 0.00 0.01 0.07 13.63 15.10 41-0224 CaSO4'0,5H2O Bassanite Minor Carbonate 1.39 0.60 0.35 0.00 1.32 0.00 46-1045 SiOj Quartz Minor Total 8.58 1.53 2.47 0.13 16.26 25.92 “ Analysis showed about half crystalline materials (50.6% above “ Organic, elemental, and carbonate carbon fractions were analyzed as background), and the remainder was amorphous. After smoothing described in text. Results are expressed as percent of total mass of and subtracting background, evaluation software (MDI Jade 5) was sample. used to match patterns with library available from International Centre for Diffraction Data Powder Diffraction File, release 2000. nickel, and iron which are important in its toxicity (Kodavanti et al., 1998). The IM HCl-soluble metal the other two WTC samples. This result may be due to content trend is Mt. St. Helens < WTC2001 < ROFA (not differences in the method by which the samples were enough NIST sample was available to run the test). isolated (physical separation vs. aqueous extraction and 3. Carbon analysis. The WTC2001 samples had low lyophilization) or may simply be due to variability in total carbon content, in the range of 1.5-8.5% (Table 4), in carbon content of samples from different locations. comparison with control samples such as NIST (26%) and Despite the variation in total carbon content of WTC PM ROFA (16%). MSH had almost no carbon, as expected samples, the ratios of elemental, organic, and carbonate from this crustal PM sample. The WTC3 sample used in ctirbon were similar. Elements not listed in Table 3 or 4 the inhalation study had about 4 times as much carbon as (-30% of total mass) are likely O and H from adsorbed water and O, H, and N from ............................ organic or inorganic compounds. 102011 SAMDnWTC dust asrecebed 4. Compound analysis by XRD. XRD analysis of WTC3 1000' PM53 (before size segregation by the inhalation exposure system) showed a complex pattern - -S' containing 25 peaks, indicating the presence of several crystalline materials. The peak area above the : 'w SOO' background curve was 50.6%. The 49.4% below the curve indicated that WTC3 consisted of about half 260- amorphous materials. Four patterns were identified as being o J, consistent with peaks identified in 1 I I.I,., Gypsum. CaS04I2H20 the dust. Figure 3 shows the XRD ................. * ■■■ ±±==a spectra of WTC3 and those of the 3 ..Z 41*Ci224> BatfsaniWj. Ca$04!£i 5H2D ‘ ■' ■ ■ ................ Calcite - CaC03 matched compounds. Two compounds were identified as . I ...... . '( I- I ■■ ■ Quata- a 02 major constituents (calcium 10 20 30 <1 50 60 70 eo carbonate (calcite) and calcium 2-Th8laO ■U.S. EPA P<RD|Airninl<tmQrT<<iADArA8CAW\DArAl)1 > Wedt>atd»v. Feb 08.2002 04:13p sulfate dihydrate (gypsum)), and Figure 3. X-ray diffraction (XRD) analysis of WTC 3 sample (PM53) used in nose-only two were identified as minor inhalation exposure study (Experiment B). Peaks were collected in the range, 29 = 5 - 85°. constituents (bassanite and quartz. Collection software used was Materials Data, Inc. Datascan, version 3.2 Table 5). The XRD data are

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NYC-WTC_000149159