NYC-WTC_000205257

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 56C6 - 10/04/01 Lab Sample Mo. 60112 Filter Type MCE 25 mm Cperacor Client Spl. No. MSEF-E-1Q./3-34 Filcer Area 335 mm"2 Instrumer.r I. D. EM 10 CRX Grid :.D. Cisk No. Screen Macnificacion 16,4007 •:GO: Area Q. 01124 mm' Ccmmencs Acc. Volcage 80 kV No. GO CO be Analyzed _4 147 gr.rticc., Torsod to ~'O s./rnfn'*2

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

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store all unrepeated spectra—^ Photo No. (from I in 5 asbestos- IdenUfy all structures using EDS Check ditfraction for aabeatos containing samples) Grid icceDUnce:! .trugturd, up to 7O./i (l>t 4) <50% undiaaolveo lliLcr, overlapped or folded Struct. = > O.Sum * > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at teaat 20 unfolded or overlapped grid square* Positive diffraction pattern properties conforming <5X holes or ooaoue areas F B C M > Sum to laboratory Identification criteria observed. -UnuM.1 MrUoa Por chrysotile: O.Tanm apaeing for (020) rsflacUons, ar niUr Chrysotile O.Mnm •peeing for the layer line repeat, streaking ■Avoided portioa of (110) and (130) renecUona. or niur Por amphiboiw: O.SOam layer line repeat, sad spproa. Portion of niter (2mm Vido) 3.9 ratio of aen-tvinasd layer line spot spacing to •ubjoet to •eonUaUon Amphibole layer line repeat distance (O.Wnm), v/s EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Piher (1-3 Intersections a 1-3 fibers) Amosite B= Hundls (>□ fibers <1 fiber diameter aparl) 29mm Hilar Crocidolite Non-asbestos mX?, ------ jsinppl., R„|„: I---- Anthophyllite NSD= No Structuro. DotoeUd | >M «/C.O. or In lit 4 C.O. Tremolite Non-Identified L\DATA\PRIVATt\NIKlC\CA00VlM3 »/22/Oa Actinolite

CITY_21MC100_009279626

NYC-WTC_000205257