TEM analysis lab report for sample 5639, Oct 8 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAF. GROUP #: 56 3 9 - 10/08/01

Lab Sample No. lILLJ.. Fiicer Type MCE 2S mm Operacor Client Spl. No. -OE Filcei- Area 385 7111! 2

Instrument I.D. Grid I.D. qc!}- Gisk No. Screen Magnification (GO) Area 0.01124 mm Comments

Acc. Voltage 8 0 kv No. GC Co be Analysed _4 3.147 Struct. Corsbd 7 0 s/mm * 2. )

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

a .>

Photci No. (from 1 in 5 aebeatoo- Identify all structures using EDS Check diffraction for asbestos _________ ________ 11 Store all unrepeated spectra—^ conUining samples) Grid acceptance: i structures up to 70a/^n (let 4) Strucit. = > O.Sum & > Sd Aspect Ratio <50X undlsBolvea filler, overlapped or folded <10X particulate coverage >50X coverage Ns hiot Obaerved (EDS apeetrum or diffraction pattern) at leaat 20 unfolded or overlapped grid aquarea Totals <SX holes or opaoue areas Pooitive diffraction pattern propertiea conforming F B C M > Sum Ui laboratory IdenUfieaUon criteria obaerved. *UnuMd porUoD Fjr ohryaoUle; O.TSnm apacini for (020) renecUoni, of niur Chrysotile O.aOnm ipeclng for the laver line repeat, atroakinc -Avoided portion el (HO) and (130) refleetiona. or niter For amphiholee: O.&Snm layer line repeat, and approx., (Smm Vido) 3.5 ratio of non-tvianed layer Une spot apacinc to I Amphibole layer line repeat diatenca (0.33nm). EDS spectrum conforming U> lab Ambiguous identification criteria obaerved. AMPHIBOLES Fv Single Fiber (1-3 interscBUon* = 1-3 flben) Amosite Bs Bundle (>3 flben <1 fiber diameter apart) ZSmra niUr Crocidolite Non-asbestos Cs Cluster (>3 intenection*) -------- )'* Stopping Rules: I---------- - Ms Matrix Anthophyllite NSD= No Structures Detected L:\DArA\PIUVATEMHKRC\CAnD\rElO B/22/08 >90 [ a/C.O. or in lot 4 C.O. Tremolite Actinolite Non-Identified

CONFIDENTIAL, CITY_21MC100_003469859 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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