Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GRnr? c^ti° -

Lab oampla No. 525'_3 Flit = z M( __ m vper3t_r

Client Sol. No 2 Filter Area 395 -nm"2 /

Instrument I.G. EM 10 CRX Grid :.C. _ CisK. Nc.

Screen Magnification 16,400X iGO) Area 3 .J112-i mm"2 Comments

Acc. Voltage 30 kV No. GC to be Analysed a 4.'2. Strict. -orsod. tt 79 ;mm

GO. Structure Structure Type Length I.D. of Structure EDS N or,/ I 30.5 um (Nonasb. No Coord. No. F B C M >. 5um - 5 um Chrys. Amphibole Nonasb. Ambig./ND Elements)

t;G 7 J _7 — L~

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Photo No. (from 1 in 5 asbestos- Identify all structures usine EDS Check diffraction for asbestos Store all unrepeated spectra

I StrucL containing samples) O.Sum & > S:l Aspect Ratio Gr:d acceptance: <50% undieaolve i er, structures up to 70s tttm aver apps <10% particulate coverage >50% coverage or o eTi

No Not Observed (EDS spectrum Sr diffraction pattern) at least 20 unfolded or overlapped grid square, < 5z hoI es or o a ue areas (lot 4)

Totals

Positive diffr tory i en pattern properties conforming teria to labontory identification criteria observed. Unu■ee portion Far ahrysotila: O.73nm s?aatn` tar (020) reflection■. of filter 0.53am .posing far the aver lane repeat. streaking Chrysotile of (110) and (130) refleetiana. Avoided portion at filter For amphiboles: 0.53nm layer line repeat. and appros. Portlen of filter (2mm amide 3.5 ratio at non-ginned layer line spot spacing to lublact to esaminstion I Amphibole layer line repast dlatance (0.53nm).

/= EDS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambi g uol1S Pc Single Fiber (1-3 Intersections = 1-3 flbera) Amosite B. Bundle (>3 fibers <1 fiber diameter apart) Cluster (>3 Intersections) a 25mm filter Croeldohte Nan —asbestos M NSO= No Structures Detected Stepping Rules: >55 ./c.D. or in la s o I AnthophVilite Tremolite Ac tinolite Non —Identified L•\DATA\PRIVATE\M1KEC\CAD0% EM3 5/22/98'

NYC-WTC 000104289