Asbestos dust analysis summary, 100 Church Street, Oct 2001

NYC 9/11 Public Portal Document .sciL^B lOb #; 202012746 Client Nanae: TRC Environmental Corporation Table I Summary of Transmission Electron Microscopy (TEM) Results for Asbestos (ASTM 5755 Dust) 3.5052-0000-00002; New Yo 'k City Law Departmen।it; 100 Church Street I KI Surface Analytical' « ' ‘ Stnichire * Analytical Structure Area Asbestos Sensitivity Density Sensitivity Density Type Sampled Dilution StruetTOS on Grid onGiid on Surface on Surface of § SciLab Client Sample Sample# (sq. cm ) Factor Detected {Str/sqmm) (Str/sqmra) (Str/sq.cm) (Str/ sq. cm ) Asbestos 01 JD012102MV21SAH15 100.0 0.030 1 10 10.0 1,070 1,070 chrysotiie w Q 21sE Floor; Supply Air Handler #15-Mixing Chamber Base of Cooling Coi s (Ki JD012102MV21SAH11 100.0 0.005 11 10 110.0 4.280 47,080 chrysotile 21st Floor, Supply Air Handler #11 -Mixing Chamber Base of Cooling Coi s 05 IDO 12102MV21RAHF12 100.0 0.100 145 33.3 4,766,7 713 102,006 chrysotile 21 st Floor, Return Air Handler-Fan #12 Root of Air Duct R 04

0.5 JD012102MV21SAH10 100.0 0.020 fl 21 st Floor; Supply Air Handler #10-Mixiog Chamber-Base of Cooling Coils JD012102MV21SAHO8 100.0 0.020. 3 10

10 <10

30.0 1,070 <1,070

3,210 NSD I T| 1.070 chrysotile n 21 st Floor; Supply Air Handler #08-Mixiiig Chamber-Base of Cooling Coi s r r 06 JD012i02MV21SAH07 100.0 0,020 1 10 10.0 1,070 1,070 chrysotile 03 tn 21st Floor; Supply Air Handler W-Mixing Chamber-Base of Cooling Coi s cr/ JD012102MV21SAH14 100,0 0.100 0 25 <25 535 <535 NSD 2 Ist Floor: Supply Air Handler #14-Mixing Chamber-Base of Cooling Coi s 08 JD012102MV21RAHF09 100.0 0.100 0 25 <25 535 <535 NSD Return Air handler-Fan #09 (KI 3D012102MV21SAH01 100.0 0.002 6 10 60.0 8,560 51360 chrysotile 7th Floor; Supply Air Handler #01 -Mixing Chamber-Base of Cooling Coil:. 10 JD012102MV07RAH2fl 100.0 0.100 13 25 325.0 535 6,955 chrysotile 7ih Floor; Return Air Handler-Fan #20-Base of Duct 11. JDO12102MVO7SAH02 100.0 0.010 17 10 170.0 2,140 36,380 chrysotile 701 Floor; Supply Handlcr#02; Mixing Chamber-Base of Cooling Coils w I-- 12 JD012102MV07SAHI)3 100.0 0.020 34 10 340,0 1,070 36,380 cluysotile w 7lh Floor; Supply Handler#03-Mixing Chamber-Base of Cooling Cork cn 13 JDO121O2MVO7SAHO4 100.0 6,005 9 10 90.0 4,280 38,520 chrysotile w O CD

14 7th Floor; Supply HandlcrfKM-Mixing Chamber-Base of Cooling Coils JDO121Q2MV07RAHF21 100,0 0,100 t 25 25.0 535 535 chrysotile a k)

7th Floor; Return Air Handler-Fan #21-Base of Duct ■D o * structure density represented by the detection of 1 structure Q o • ** not analyzed W o Q NSD; No Asbestos Scmctures Detected nare: 1/23/02 'o Reviewed By: ; Analyzed tn Alck^ioJarengolts cn 00

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