NYC-WTC_000182514

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5609 - 10/05/01 Lab Sample No. £0021 Filter Type MCE 25 mm OperaC-or Client: Spl. No. SHS-l>I0-10,/S-14 Filter Area 385 mm"2 Inscrument I.D. EM 10 CRX Grid I.D. Vil Disk No. Screen Magnification 16,40QX (GO) Area 0.01124 mm"2 Comments Acc. Voltage 8 0 kV No. GO Co be Analyzed _4 ( 3.147 struct. Corspd. Lo 70 5/mni^2.)

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

V 7

Store all unrepeated spectra—^ Photo No. (from 1 in 5 aabestoa- Identify all structures using BPS Check diffraction for aBbealoa containing samples) Grid acceptance:! structures up to TOa/'^m {l«t *) <50% undisaolvea filter, overlapped or toided Struct. = > O.Sum & > 9:1 Aspect Ratio <10X particulate coverage >50% coverage Totals N=: Not Observed (EOS spectrum or diffraction pattern) al least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or ooaque areas F B C M > Sum to laboratory identification criteria observed. -Unuaed portion For chryaotile: Q.73nm toacing (or (020) renecUona. of niur Chryaotile O.banm spaaing for the layer tins repeat, streaking -Avoided portion at (110) and (130) reflections. or niUr For amphiboles: O.SSnm layer line repeat, and approx. Portion at niUr [2mm wide) 3.3 ratio of non-tvlnned layer line spot spacing to aubJoGt to Amphibole layer Une repeat distance (0.53nm). azaminatlea

EDS spectrum conforming to laboratory Ambiguous Identification critarta observed. AMPHIBOLES P= Single Fiber (1-3 InterBccUona = 1-3 fibers) Amoaite Q= Bundle (>3 fibers <1 fiber diameter apart) ZSmm filLar Crocidolite Non—asbestos C= Cluster {>3 IntersecUona) _ I 3toppiBg Rule*; I Anthophyllite M= Matrix NSQs No Strocturea Oeteoted U\aATA\PSIVATg\MlKRC\CAOO^TeMa [ >50 a/C.O. or In lat 4

9/22/aa 3 Tremolite Actinolite Non-Identified

CITY_21MC100_003099085

NYC-WTC_000182514