NYC-WTC_000188483

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP tt: 5785 - 10/26/01

Lao Sample No. 62412 Filter Type MCE 2S mm Operator Client Spl. No. 5 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. Disk No Screen Magnification 16,4QOX (GO) Area 0.01124 mm"2 Comments Act- Voltage 8 0 kV No. GO tc be Analysed 4 3,147 Struct- Corsod. no 70 s/mm"2.)

Length I.D. of Structure EDS GO. structure structure Type (Nonasb. No Coord. No. >0.5 um F B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

Z- 05

Store all unrepeated spectra—*^ Photo No. {from 1 in 5 asliestoa- Identify all structures using EDS Check diffraction for asbestos containing aampies) Grid acceptance:! atructurea up to 70a/&m (l»l 4) <5QX undiasolvetf filter, overlapped or foldea Struck = > Q.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Na Not Observed (EDS apectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <3% holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory Identification criteria observed. -Unuaed portion Por chryBollls: C.73nm spoelne for (020) reflecUoni. of niur Chrysotile 0.53nin spacing for the layer line repeat, streaking -Avoided portion of (110) and (130) reflections. of filUr For amphiboles: Q.53nm layer Une repeat, and approx. PorUen of fitter (2mm wide) 3.5 ratio of non-tsinned layer Une apot spacing to lubjeet to axaminaUon Amphibole layer line repeat diatance (D.53nm). EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES Ps Single Fiber (1-3 intersectiona a 1-3 fibera) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) ZSmin niter Crocidolite Non-asbestos

□ Cs Cluster (>3 intersections) J Stopping Rules.’ - Ms Matrix r Anthophyllite NSDs No Structures Detected I >50 s/C.O. or in let 4 C.O. Tremolite Actinolite Non—Identified L:\DATA\PRIVATE\MIKEC\ CADDXTEIM 0/22/08

CITY_21MC100_003081433

NYC-WTC_000188483