Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP N : 5171 - 13/26/01

I Lab Sample No. 62586 'p MC! 25 mm Filter Type Cperac~: L / Client Spl. No. 22 Filter Area 395 mm"2 Instrument I.D. EM 1C CRH Grid I.D. a.~: Disl No, Screen Magnofication 16,400X. (GO) Area 0.01124 mm_ Comments I Acc. Voltage 80 kV No. GO to be Analyzed o 4.72' S-,••1ct :: oa. 'u ~mm'

GO. Structure Structure Type Length I.D. of Structure EDS N or,/ >,0.5 um I (Nonasb. No Caord. No. F B C M < 5um IChrys. Amphibole Nonasb. Ambig./ND Elements)

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I Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra J containing samples) I u cceptanceTl structures uu to 70a Item (lot 4) I Stru t. = 0.5um k > 5:1 Aspect Ratio <50% ndissolve t er, over apps or o e <10% particulate coverage >50% coverage N- Not Observed (EnS spectrum or diffraction pattern) aG leset 20 unfolded or overlapped grid squares I Totals v / Positive diffraction pattern properties conforming <Sx holes or o a ue areas to laboratory Identification criteria observed. Un ed portion For ebrysoUle: 0.77nm spscm for (020) reflections. of filter Chryso tile 037nm spacing far the layer line repeat, streaking Asaitled portion of (110) and (130) reflections. of deer For ampbiboies: 0.53nm layer line repeal and appras. Portion of filter (2mm side) 3.5 ratio of non-twinned layer line spot spacing to mblect b esaminaUoa Amphibole Layer line repeat distance (O.57nre). EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES g Fe B. Single Fiber (1-3 intersections = 1-3 fibers) Arnosite Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non —asbestos C= Cluster (>3 intersections) stepping Rule.: ' M= Matrfs Anthophyllite NS0= No Structures Detected > 50 a/. c0. or i n tit 4 C.O. Tremolite Non —Identified Actinolite L•\DATA\PRIVATE\MIAEG\CADD\TEM3 9/22/9e

NYC-WTC 000104400