NYC-WTC_000232928

NYC 9/11 Public Portal Document

NYC Response Asbestos Air Sampiing Resuits at Fixed Locations Data Validation Date; 02/17/02 Sampiing Date and Time: 2/13/20021200 to 2359 PCM by NiOSH 7400 TEM AHERA) Sampiing Sampiing Sample Structures (#) Date Sampie No. Location Volume* Matrix f/mm^ f/co Q.5u - 5u Sp S/mm’ S~f/CC** 02/13/02 TTW-00491 L 1096.2 Air <7.0 <0.002 0 0 <13.33 <0.0047 02/13/02 TTW-00492 Ml 1034.25 Air <7.0 <0.003 0 0 <11.43 <0.0043 02/13/02 TTW-00493 N 1114.2 Air <7.0 <0.002 0 0 <13.33 <0.0046 02/13/02 TTW-00494 J 1092.6 Air <7.0 <0.002 0 0 <13 33 <0.0047 02/13/02 TTW-00495 J Dup 1135.9 Air <7.0 <0.002 0 0 <13.33 <0.0045 02/13/02 TTW-00496 Q 1254.6 Air <7.0 <0.002 0 0 <16.00 <0.0049 02/13/02 TTW-00497 F 1188 Air <7.0 <0.002 0 0 <13.33 <0.0043 02/13/02 TTW-00498 A-Dup 1115.55 Air <7.0 <0.002 0 0 <13.33 <0.0046 02/13/02 TTW-00499 B 1177.75 Air <7.0 <0.002 0 0 <13 33 <0.0044 02/13/02 TTW-00500 C 1017 Air <7.0 <0.003 22.86 0.0087 02/13/02 TTW-00501 D 1121.4 Air <7.0 <0.002 0 0 <13.33 <0.0046 02/13/02 TTW-00502 K 387 Air <7.0 <0.007 0 0 <8.00 <0.0080 02/13/02 TTW-00503 U 1260 Air <7.0 <0.002 0 0 <16.00 <0.0049 02/13/02 TTW-00504 V 1254.75 Air <7.0 <0.002 0 0 <16 00 <0.0049 02/13/02 TTW-00505 S 1099 Air <7.0 <0.002 0 0 <13.33 <0.0047 02/13/02 TTW-00506 E 1105.2 Air <7.0 <0.002 0 0 <13.33 <0.0046 02/13/02 TTW-00507 W 1080 Air 12.74 0.005 ....l ....l 26.67 0.0095

No sample tor location A due to pump fault

Sampling Locations: Key; A: NE corner of West Broadway & Barclay M: Western end of Harrison St. at West St. * Some sample volume (liters) is below recommended B: SE corner of Church & Dey St. (on tree next to bulkhead) limit for the TEM method; volume is based on C: Trinity (a.k.a. Church) & Liberty Ml : West St. - 50 yards south of Harrison St. at bulkhead pump reading Cl: SW corner of Broadway & Liberty St. N: South side of Pier 25 (next to volleyball ct) ** Structure (S) is roughly equivalent to fiber (f) D: East end of Albany St. at Greenwich St. P: NE corner of South End Ave. & Albany *** Chrysotile E: Western end of Liberty St. at South End Ave Q: Barclay & West St. (center island) in **** Extremely low sample volume collected F: Northern median strip of Vesey & West St proximity to USCG command post ***** Actinolite G: Church and Duane St. R: TAGA Bus Location NA<'> - Not analyzed due to overloading of H: South side of Chase Manhattan Plaza at Pine St. S: Rector & South End particulates I: SE corner of Wall St. & Broadway T: Pier 6 Heliport NA<"> - Not analyzed for TEM J: NE corner of Warren & West St. U: Pier 6 Exit 2 n/a - Not applicable K: West St. & Albany in median strip V: Pier 6 Bus Sign NR - Not requested L: On walkway toward North Park rec area (north side W: Wash Tent Common Area NS - Sample not submitted of Suyvesant High), access to TAGA bus area

NiOSH 7400: Fiber Analysis of Air Samples via NiOSH 7400, Revision 3, issue 2, 8/15/94 Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) EPA 40CFR Part 763 (AHERA) o Standard criteria; EPA 40CFR Part 763 (AHERA): 0.C1 tiber/cc (PCM), 70 S/mm^, volume 120C L, for 25 mm filter (TEM)

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NYC-WTC_000232928