100 WILLIAM STREET Block: 68 Lot: 36 BIN: 1001116 72-78 John St., 29-35 Platt Street

NYC 9/11 Public Portal Document ov.~ oioc Sep-28—01 05:O8P NICHE ANALYSIS,ING. W14

NICHE ANALYSIS, INC.

AIR SAMPLE AWALYStS REPORT

NICHE FILE: 01.0614.0 Leurenca S. Molloy, LLC 40 Fifth Avenue New York, NY 10011 Phone (212) 929-8080, Fax: (212) 807-8355 Page 1 of 1 C[IENT NIA SAMPLED BY Laurence Molloy LOCATION Lobby, 5th Floor & Outdoors I iIYST Bing Liang PROJECT ADDRESS 100 Williams Street DATE SAMPLED 09-24.01 New York, NY DATE ANALYZED 092S.01

Sample No. Lab No. Sara ie Typo Sample Location Volume Result (liter) (flberelco) 1 40908327 Environmental Lobby 1575 0.0044 2 A0808328 Enviroronerltal Outdoors of the building _ 980 0.0055 3 A0908320 Environmental 5th floor 1250 0.0051

I 1.. r .. .. I.. .. -

Note. N1C.IE Is rsstnmlhte tor' only the filasr carats taitl* the int9atkses at the mothad duertbtd an NiOSH 7436. Amorg other Ilotila lions, this method pons only an Indos 01 sitbotne rersrs and provides mdy an estimate of Isbeaas catcantmtior. Aay artf ay claims arWng out of MiCHE's analysis of these sang:ar ens Iknited Is recovery to cost of mtatyrlag sangtlos. Us roptat dale mat Ins reproduced trstopt In fue, without the wditae i proyd of NICIIL WCNE ac►.apta no otiarr kheky and the CCtans ogress to sock no eases tatymd the aloe% ' CLCD - loss tin htlt of detection, which is ILD55 Meta per Red. in eca4atce with NioN Method 7400.

SAMPLE ANALYSIS BY: (PCMI J POSITIVE PHASE CONTRAST MICROSCOPY LtMETHOO OF SAMPLE PREPARATION & ANALYSIS: ALL SAMPLES WERE ANALYZED IN ACCORDANCE WITH THE NIOSH 7400 METHOC USING "A COUNTING RULES. t'IIJSiRUINT: E, LEITZ WETZLAR PCM•Nr.ElHGSS WITH WALTON.eECKm GRATICULE (1001141 FIELD DIAMETER)

ELAP#:11236

—\ 'L Thomas Palackalr Ph. 0. Laboratory 0iretcor '\AjlUeSed S story

LU Flake Place, Senile 517, Muat Vernon, NY 10350 • Phone: (914) 663-13937 • Fax: (914) 663•e782

NYC-WTC 000131021