Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS GROUP »; 563S - 10/08/01 Lab Sample No. 60557 Filter Type MCE 25 mm Operator 1''^ Client Spl. No. NSHA-EB&R-10/8-02 Filter Area 385 mm 2 Instrumenc I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analysed _4 ( 3.147 Struct. Corspd. to 70 5/mm^2.)

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

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Store all unrepeated spectra—^ Photo No. (from I in fl aabestos- Identify all atructurea uaing EDS Check diffraction for aabeatoa containing samples) Grid acceptance; I istructures up to 70a/iftrT (l»t 4) <50X undioBolvcdTITTer? , overlapped or folded Struct. = > 0.5um A > 3:1 Aspect Ratio <10X particulate coverage >50X coverage Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals y/a Positive diffraction pattern properties conforming <5X holes or opaque areaa F B C M Sum to laboratory Identification crlloria observed. Inused porUon For chrynlile: 0.73nm apaeinx for (020) rsnecUons, or niter 0.93nm spacing for Uis layer Iios repeat, streaking Chrysotile of (HO) and (130) reflecUona. Avoided portion of niUr Por amphiboles: a.&3nm layer Hoe repeat, and approx. PorUon of niter (2mm vide) 3.3 raUo of non-lwinned layer Une spot spacing to ■ubject to •saminaUoa Amphibole layer line repeat distance (0.Sanm). \Za BDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Slnfle Fiber (1-3 InLerscctioni s 1-3 fibers) Ainoaite Bs Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 inUrsecUoni) 29mm flltar Crocidolite Non-asbestos I I stopping Rule»; L—_ Anthophyllite M= Matrix NSDs No Structures Detected >30 b/G.O. or la I at 4 C.O. Tremolite Actinolite Non-Identified UXDATAXPRrVATEXmKECXCADWTBXa B/22/Sa

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