NYC-WTC_000232860

NYC 9/11 Public Portal Document

NYC Response Asbestos Air Sampling Results at Fixed Locations Data VaSidation Date; 02/13/02 Sampiing Date and Time: 2/10/20021200 to 2359 PCM by NiOSH 7400 TEM A HERA) Sampiing Sampiing Sample Structures (#) Date Sample No. Location Volume* Matrix f/mm^ f/cc O.sp- 5p 5p S/mm’ S~f/cc** 02/10/02 TTW-00391 L 1058.75 Air <7.0 <0.003 0 0 <13.33 <0.0048 02/10/02 TTW-00392 Ml 502.25 Air <7.0 <0.005 0 0 <8.00 <0.0061 02/10/02 TTW-00393 N 1055.25 Air <7.0 <0.003 0 0 <13.33 <0.0049 02/10/02 TTW-00394 J 1018.5 Air <7.0 <0.003 0 0 <11.43 <0.0043 02/10/02 TTW-00395 Q 1098 Air 8.92 0.003 0 0 <13.33 <0.0047 02/10/02 TTW-00396 Q-Dup 1110 Air <7.0 <0.002 0 0 <13.33 <0.0046 02/10/02 TTW-00397 F 1058.75 Air <7.0 <0.003 0 0 <13.33 <0.0048 02/10/02 TTW-00398 A 488.25 Air <7.0 <0.006 0 0 <8.00 <0.0063 02/10/02 TTW-00399 B 1200.5 Air <7.0 <0.002 0 0 <13.33 <0.0043 02/10/02 TTW-00400 C 1020 Air <7.0 <0.003 0 0 <11.43 <0.0043 02/10/02 TTW-00401 D 1102.5 Air <7.0 <0.002 0 0 <13.33 <0.0047 02/10/02 TTW-00402 K 1053.5 Air 7.64 0.003 0 0 <13.33 <0.0049 02/10/02 TTW-00403 U 1260 Air <7.0 <0.002 0 0 <16.00 <0.0049 02/10/02 TTW-00404 S 519.75 Air <7.0 <0.005 0 0 <8.00 <0.0059 02/10/02 TTW-00405 E 1090.8 Air <7.0 <0.002 0 0 <13.33 <0.0047

No samples were taken for Locations M1-dup, V and W due to pump fait.

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 M1 : 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, 8/1S/94 Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) EPA 40CFR Part 763 (AHERA) Standard criteria: EPA 40CFR Part 763 (AHERA): 0,01 fiber/cc (PCM), 70 S/mm’, volume 1200 L, for 25 mm filter (TEM)

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NYC-WTC_000232860