Asbestos TEM micrograph data sheet, Oct 27 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: S7S4 - lQ/27/C'l Lab Sample No. 62400 Filter Type MCE 25 mm Operator Cli€inc Spl. No. .15 Filter Area 38S mm’ Inst;rumenc I.D. EM 10 CRX Screen Magnification 16 40CX Grxd I.D 'GOi Area —W— C . 01124 mm' Disk No

Conments Acc. Voltage 80 kV No. GO cc be Analysed 4 3.14"’ Struct. Corspd. co 7C g/mm"I

Length I.D. of Structure EDS GO. Structure structure Type (Nonasb. No Coord. No. >0.5 um > Sum F! B C M < 5 um Chrys. Amphibole Nonasb. Ambig./ND Elements) z &Z2Z ■2. (/ /f

I I I __________ ________ Pho;o No. (from 1 in S asbestos- Identify all structures using EDS Check diffraction for asbesloa Store all unrepeated spectra— containing samples) Grid acceptance: I structures up to 70a/Am (1»L 4) <S0X undisBolvea filLer, overlapped or folded Struct = > 0.5um de > 5:1 Aspect Ratto <LOX particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming Lo labcralory identification criteria observed. •Unused portion ef niter For chrysotile: O.TDnm ipacing for (020) rsflactJoni. O.S3nm spacing for the layer line repeat, atreaking Chrysotile 'Avoided portion of (110) and (130) reflections. of ruter Per amphiboles: 0.&3nm layer line repeat, and approx. Portion of filter') V (2inm wide) 3.S ratio of non-tvinned layer line spot spacing Lo subject to axaminstion ) T Amphibole layer line repeat distance (0.53nm).

/= EDS spectrum conforming to laboratory Ambiguous dentification criteria observed. AMPHIBOLES F= .Single Fiber (1-3 InteraectlDns = l-O fibers) Amosite 0= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 Intersections) 25mm flltar f Slopping Rules: I------------ Crocidolite Non-asbestos Ms Matrix Anthophyllite >60 1/0.0. or in l«t 4 0.0. Tremolite NSDs No Structures Detected Non-Identified Actinolite L:\DATA\PRIVATE\MJKEG\CADD\rEM3 8/22/00

CONFIDENTIAL, CITY_21MC100_003473453 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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