NYC-WTC_000199812

NYC 9/11 Public Portal Document

TABLE 2. CONCENTRATION OF 2,3,7,8-TCDD EQUIVALENTS (I/TEF-89) AND PCB AROCLORS IN SURFACE WIPE SAMPLES OBTAINED FROM HORIZONTAL SURFACES IN APARTMENTS

2378-TCDD PCBs,* Sample No. Sample Location Sample Description Equiv., ng/m’ ^^=z==s:^=

250SEA10D- 250 South End Ave, Top of entertainment center DFl Location 1, Site 1 & dining room table (sample 0.038 ND(<0.10) area = 1.04 m’) 45WAR2- 45 Warren Street, Top of table (sample area = 0.026 ND(<0.10) DFl Location 1, Site 1 1.08 m’) 45WAR2- 45 Warren Street, Bench window ledge (sample 0.088 ND(<0.10) DF2 Location 1, Site 1 area = 0.372 m^) 45WAR5- 45 Warren Street, Top of table (sample area = 0.0012 ND(<0.10) DF2 Location 1, Site 2 0.932 m’) 45WAR5- 45 Warren Street, Top of table (sample area = 0.012 ND(<0.10) DFl Location 1, Site 2 1.022 m’) 45WAR2- 45 Warren Street, Field Blank 0.0 ND(<0.10) DF3 Location 1, Site 1

’ Aroclors 1016, 1221, 1232, 1242, 1248, 1254, and 1260 were not present above the reported analytical limit of detection.

TABLE 3. CONCENTRATION OF 2,3,7,8-TCDD EQUIVALENTS (I/TEF-89) AND PCB AROCLORS IN DUST OBTAINED FROM APARTMENTS

PCB- I 2378-TCDD 1260,*’ Sample No. Sample Location Sample Description Equiv., ng/kg mg/kg 250SEA10D- 250 South End Ave, Dust from surface of chest 54’ 0.16*= DF2 Location 1, Site 1 (sample area 0.529 m^) — 250SEA- 250 South End Ave, Dust from exterior window 260 0.35 WL-BDl Location 1, Site 1 ledge at east elevation 250SEA-R- 45 Wanen Street Dust from rooftop 33 0.23 BD2 f

“ Equivalent to a surface concentration of 0.47 ng/m’ based on a sample area of 0.529 m’. *’ Aroclors 1016, 1221, 1232, 1242,1248, and 1254 were not present above the reported analytical limit of detection.

' Equivalent to a surface concentration of 0.66 /zg/m^ based on a sample area of 0.529 m^.

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CITY_21MC100_006730098

NYC-WTC_000199828