VOC sampling locations table for Ground Zero area, Jan 2002

NYC 9/11 Public Portal Document

Figure 10. Satellite photograph of WTC plume lofting from Ground Zero at 11:54 am EDT on September 15, 2001, and dispersion to the S/SW out over the New York Harbor. (Source: Mandatory Credit: “spaceimaging.com”).

Figure 11. Panel A (top): Daily PM2.5 concentrations monitored by EPA/ORD at sites A, C, and K around Groimd Zero perimeter and at 290 Broadway 6 blocks northeast of Ground Zero. Panel B (bottom): PM2 5 concentrations observed at several extended monitoring network sites in lower Manhattan within 3 to 10 blocks of WTC Ground Zero.

Figure 12. ORD-modeled WTC plume dispersion on October 4,2001 at 3:00-4:00 a.m. Note the general regional elevation of hourly PM2 5 levels (in pg/m’) indicated by red numerals for monitoring sites scattered across both northern New Jersey and NYC areas, even outside modeled areas of likely greatest plume intensity indicated by red shading.

Figure 13. Daily PM2 5 concentrations recorded at NYSDEC PS 64 monitoring site after September 11, 2001 (9/11/01 to 10/27/01) compared to historic record of 24-hr PM2 5 values at the same site during prior 2 years (2/23/00 to 9/01/01). Note exceedence of 40 pg/m^ AQI Level of Concern on September 13 and likely again on October 4; red portion of bar indicates 24-hr average if three high hourly values (> 100 pg/m’) being evaluated for data quality are included in 24-hr average calculation.

Figure 14. ORD measurement of PM2 5 elemental constituents Ca, Si, and K at Ground Zero perimeter sites and 290 Broadway site.

Figure 15. ORD measurements of PM2..5 elemental composition for S, Cl, and Br at Ground Zero perimeter sites and 290 Broadway site.

Figure 16. ORD measurements of PM2 5 elemental constituents Pb, Cu, and Zn at Ground Zero perimeter sites and 290 Broadway site.

Figure 17. ORD measurements of PMj , elemental constituents As, Pd, and Sb at Ground Zero perimeter sites and 290 Broadway site.

Figure 18. ORD measurements of PM2 5 elemental constituents Ni, Cd, and Cr at Ground Zero perimeter sites and 290 Broadway site.

Figure 19. PM2 5 concentrations recorded on rooftop of DOE Facility at Varick St., approximately 2.0 miles N/NE of Ground Zero. Note single very high PM, , excursion mainly restricted to morning hours of October 3 (see inset figure for October 3), consistent with ORD measurements at location A on the WTC north perimeter and Ground Zero plume plot shown in Figure 2 for October 3.

Figure 20. Ambient air lead concentrations (pg/m’) at sites within Ground Zero or in lower Manhattan locations in immediate vicinity of the WTC.

Figure 21. Location of PCB monitoring stations.

DRAFT-DO NOT QUOTE OR CITE V October 2002

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