NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA3 C-RCtJF a • ? Lab Samp la Me Filter Type MCE 25 mm Clienc No. 26 F-lter Area / ~ inrn 2

Inscrumenc I C-rid :,S Disk Nc. Screen .MaaniiicaCLcn I GO’ .^rea mm Comment 5 Acc. Voicage 3 0 kV Mo. '30 to be AnaL/zsd 3 ' mm

structure (Slruclure Type Length I.D. of Structure N or EDS GO. i (Nonasb. ! No, Coord. No. ^0.5 um s Fi B c Im < 5 um » bum Ichrys.i Amphibole Nonasb. 'Ambig./ND' Elements) I

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i ! ! H Store ail unrepeated spectra Photo No. (from 1 in 5 asbestos- Identify all structures using EDSI Check diffraction for asbestos containing samples) Grid acceptance;! structures up to TQs/^m (I a t 4) Struct. = > O.Sum k > 5:1 Aspect Ratio <50S undiaaolvea filter, overlapped or folded <10X particulate coverage >S0X coverage at least 20 unfolded or overlapped grid squares Totals Ns Not Observed (EDS spectrum or diffraction pattern) Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum lo laboratory Identification criteria observed. Inuaed portion Fer chrysotile: O.TDnm spacing for (020) rsfleeUons. or filler Chrysotile Q.53nm ipaoing for the layer line repeal, ilrsaktng -Avoided portion af (110) and (ISO) reflections. of filler For amphibolaa: 3,S3nm layer Una repeat, and approx. Portion of filler (2mm wide) 3.5 ratio of non-lwlnned layer line spot spacing to auOiBcl lo examination Amphibole layer line repeat distance (0.53nm|. v/a EDS spectrum conforming lo laboratory identification criteria ebserved. i AMPHIBOLSS Ambiguous i F:s Single Fiber (1-3 intersections = 1-3 fibers) Amosite 3s Bundle (>3 fibers <1 fiber diameter apart) C= Clueler (>3 interxecUona) 25mm filler Crocidolite Non-asbestos! M= Matrix , .—I Slopping Rules: — ; AnLhaphyllite ; h SSD= No Structures Delected I >50 i/C.O. or in 1st 4 C.O. > I Tremolite ' . x j ! ! AcUnoliU , Non-Identified 1 L\DATA\PRIVaTE\J<1KBC\CAD0\TE1<3 9/22/98

CITY_21MC100_002849268

NYC-WTC_000209910