VOC sampling locations table for Ground Zero area, Jan 2002

NYC 9/11 Public Portal Document

Table 14. Summary of the first measurements of dioxin TEQs, asbestos, and lead at locations within or very near Ground Zero.

Contaminant Concentration; Location; Later Measurements and Other Comments Sampling Date Dioxin TEQ, 160 WTC 9/23 All subsequent measurements were less than 100 pg pg/m’ 170 WTC 10/2 TEQ/m’through 5/28/02. Note: Upwind monitors on 170 WTC 10/4 South End (Liberty, Albany and Rector) all showed NDs on 9/23, indicating that elevations were tied to plume. 130 Church/Dey 9/23 No further samples > 10 pg/m’; samples through 5/17/02 100 Liberty/Broadway 9/23 No further samples > 10 pg/m’; samples through 10/26/01 Asbestos, 160 Barclay/W Broadway 9/14 All subsequent BarcIay/W Broadway lower than 100 S/mm’ ND Barclay/W Broadway 9/15 S/mm^. 128 Barclay/W Broadway 9/15 80 Albany/West 9/22 Concentrations were less than 70 S/mm’ on Sep. 17,18, 89 Albany/West 9/23 20, and 21, but no measurements above 70 after 9/30. 178 Albany/West 9/27 71 Albany/West 9/30 48 Liberty/S. End 9/14 There were measurements between 9/15 and 9/30 that 90 Liberty/S. End 9/15 (dup) were less than 50 S/mm\ but no measurements after 9/30 53 Liberty/S. End 9/15 above 50 S/mm^ 80 Liberty/S. End 9/30 Asbestos”, 0.1 Fulton/Church 9/13 All subsequent measurements after 9/28 were under 0.04 ftcc 0.078 Fulton/Church 9/26 fZcc (through 8/03/02), but 6 samples between 9/15 and 0.059 Fulton/Church 9/28 9/19 were between 0.020 and 0.034, and samples on 10/1 and 10/3 were at 0.035 and 0.023, respectively. 0.035 Vesey” 9/16 Next samples on 10/6-10/9 were between 0.008 and 0.023; 0.024 Vesey” 9/17 no samples taken after 10/9. 0.035 Fulton” 9/15 One sample on 9/14 was below LOQ; no samples taken 0.030 Fulton” 9/16 after 9/16. 0.020 Liberty/Church 9/14 One sample on 9/14 was below LOQ; no samples taken 0.021 Liberty/Church 9/18 after 9/18.

Lead, ftg/m’ 4.3 Barclay/W. Broadway 9/23 One sample > 1.0 gg/m’ on 10/4, otherwise, all samples < 2.8 Barclay/W. Broadway 9/27 0.6 gg/m’; samples through 2/5/02 1.9 Church/Dey 9/18 all other < 0.7 gg/m’; samples through 2/5/02. 1.7 Church/Dey 9/23 5.4 WTC 9/23 next sample at WTC on 10/2 was 1.1, and one other 1.1 on 10/15, but otherwise all samples < 0.8 through 2/5/02. Similar to dioxin, all South End sampling locations had very low findings in initial 9/23 samples.

“ Alt of these samples taken by and reported by the NYCDEP. *’ Actual location was described as, Vesey between Church and Broadway. ' Actual location was described as, Fulton between Church and Broadway.

DRAFT~DO NOT QUOTE OR CITE 124 October 2002

NYC-WTC_000148965