Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

INC. - TEM ANALYSIS ATC ASSOCIATES - 10/25/01 LAB GROUP #- 5761 Operator Filter Type MCE 25 mm 62208 Lab Sample No. Filter Area a Disk No. Client Spl. No. 35 Grid I.D. Comments CRX Instrument I.D. EM 10 (GO) Area 0 orsPd to 70 s/mm y 7zl St uct Screen Magnification 16 402X No GO to be Analyzed 6 EDS 80 kV Nor✓ Acc. Voltage I.D. of Structure (Nonasb. Length Elements GO. Structure structure Type um 5um Chr s. Amphibole Nonasb. Ambig./ND No Coord. No. F B C M

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Photo No. from samples) 1 In S asbeetoe- Identlf7 all structures Gri usi acceptance: BDS

r, up Check diffraction for struct u res overlapped 0x undiswive coverage >50>< overage or to 7os iltn o ° asb (let 4) T as containing Aspect Ratio <10% particulate <5 overlapped grid square' Struct = > 0.5um k > 5:1 pattern) at least 20 unfolded or or o a tie areas <57. holes N= Not observed (90 spectrumppperUa■ or dlffraeUoa conforming of portion pattern Chrysotile N = positiv■ diflnetionidantifleatlon criteria observed, of niter rater to laboratory for (020) refleetione. Avoided portion 0.73am .peeing Far ahrP°Illa for the layer llaa repeat. streaking of filter 0.03nm ■paolag Portion of fitter (2mm ode) Amphibole of (110) and (130) 03 u-- layer Ilse repeal and approa. suble=t to 0A3nm spacing to suminetion Pot aU bi olar -binned layer tine (0.6nm)• spot 3.5 raUO of son distance (0.65 Ambiguous line repeat conform bs to labor,Wr7 AMPH ~= SOS ■ spectrum Amoslte idenUlaauoa criteria 1 °bMeryicns - -3 fibers) 25mm Rlbr C[ooldolite Non —asbestos layer Fiber (1-3 lnWreec Single Po B. Bundle ((73 rtben <I fiber diameter apart) SWPPtniRuln: Anthophyllite intersecuoe n) Tremolite ,VOr1_Identified Cr cw■ter >9

NYC-WTC 000104218