NYC Asbestos Air Sampling Results, Sept 20, 2001

NYC 9/11 Public Portal Document

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Q-' New York City Emergency Response Asbestos Air Sampling Results at Fixed Locations Sampling Time: 2.00 AM 9/20/01 to 10.00 AM 9/20/01 / Sample PCM NIOSH 7400 TEM(AHERA) Date Sample No. S.L Volume Matrix f/cc <Sp (>Sp) S/MM’ (S~f/cc) S{*) Air 7.64 0.007 <8.00(<0.0073) 9/20/01 21111 A B 424 Air <7.0 <0.007 <8.00 (<0.0075) 9/20/01 01446 406 9/20/01 01448 C 480 Air <7.0 <0.006 <8.00 {<0.0064) 9/20/01 01450 D 417 Air <7.0 <0.006 <8.00 (<0.0074) 9/20/01 01422 E 215 . .-Air <7.0 ' --<0.013 <8.00 (<0.0143) 9/20/01 01425 F 421 Air 10.83 0.010 <8.00 (<0.0073) 9/20/01 01426 G 401 Air <7.0 <0.007 <8.00 (<0.0077) 9/20/01 01426 H 422 Air <7.0 <0.008 <8.00 (<0.0073) cndmMlI

NA: not analyzed due to oveloadlng of particulates PCM-. NIOSH 7400 Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) EPA 40CFR Part 763 (AHERA), S:L: Sampling Locations Sample volume is below recommended limit of the method: 'Structure (S) Roughly equilvalent to Fiber (F) Standard criteria: EPA 40CFR Part 763 (AHERA): 0,01flber/cc (PCM), 70S/nim2, volume 1200L, for 26MM filter (TEM)

A: Barclay+Broad B: Chufch+Dey St. C; Liberty+Broad D: Broad*Wall E: Albany + Greenwich o F: IWast + Vessey H G: West* Warren K I H; Harrison Tree ERT 9/21/01 to o s O E) 7 o

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NYC-WTC_000186257