Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GRCUP d. 5'59 - 1) 26/0. I Filter Type MCE 3_ mm ODera Ccr Lab Sample Mc. 5253i

Client Spl. No 32 Filter Area 385 mm"2

Grid I.C. v & Disk No. Instrument I.D. EM L CAN Screen Magnification 15,400X (GO) Area 0.01134 mm'. Commer.ts

Acc. Voltage 80 kV No. GO tc be Analyzed i 4 '21 Struc: Ccrsrd. :o 'L s'mm"3

EDS GO. Structure structure Type Length I.D. of Structure N or (Nonasb. I No Coord. No. F B C M <05 5um Chrys. Amphibole Nonasb. Ambig./NDi Elements)

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H Photo No. (from 1 in 5 asbestos— Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures u to 70a t~tim ( let 4) <50% undissolve i r• pe r b e Struct. = > C.5um & > 5:1 Aspect Ratio Totals <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares <5S holes or opaque areas Positive diffraction pattern properties conforming to laboratory identification criteria Unused portion Far aha7aoUle: a.73nm spacing for (020) renectiona. of filter Chrysotile 0.9.7am spacing for the layer line repeat, streaking Avoided portion of (110) and (130) reflections. of filter Par amphibalas: 0.59nm layer line repeat. and approx. (2mm olds) 3.5 ratio of non-twinned In line spot spacing to Amphibole Layer line repeat distance (a.07nm). ✓= EDS spectrum conforming to laboratory Ambiguous I identification criteria observed. PHIBOLES observed.e7Arnosite Fa Single Fiber (1-3 intersections = 1-3 fibers) B= Bundle (>3 fibers <1 fiber diameter apart) 22mm niter Crocidolite Non —asbestos C= Cluster >3 intersections) ''--~ Rules: Anthophyllite M= Matrix Stopping NSD No Structures Detected >5a a/C.o. or in 1st 4 C.O. I Tremolite Actinolite Non —Identified I L.\0ATA\PRIVATE\MIKEC\CADDytM3 9/22/98

NYC-WTC 000104299