Asbestos TEM analysis results, Oct 16 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB .GROUP : 5709 - 10/16/01 Lab Sample No. S1442 Filter Type MCE 2 5 tnm Operator. Client Spl. No. NSHS-gIR-10/16-9 Filter Area 38 5 Instrument 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 Analyzed _4 { 3.14'7 Struct. Corspd. co 70 s/mm""2.)

GO. structure Structure Type Length I.D. of Structure EDS >0.5 um (Nonasb.

(A r No Coord. No. F B C M > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um /^/ 6/ ./ //

Photo No. (from I in S aabeBtos- Identify all alructurcB using EDS Check diffraction for asbestos store all unrepealed spectra containing samples) Grid acceptance; I atructurea up Jto 708/^m (l»l 4) Struct. = > O.Sum de > 5:1 Aspect Ratio <SOX undiaaoived filLcr, overlapped or‘ foideo <10X particulate coverage >50X coverage Totals Ns Not Obeereed (EDS epectrum or diffraction petLem) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M >• Sum to laboratory IdenUfieatlon criteria observed. 'Unused portion For chrysotile: 0.73nm spacing for (020) reflsctions. Of niter Chrysotile 0.93nm spacing for the layer line repeat, streaking ‘Avoided portion of (110) end (130) renecUoaa. of niter For amphiboles: 0.&3nm layer Une repeal, and approx. Portion of filler (Smm vids) 3.9 ratio of non-lwlnned layer Une spot spacing to subject to aaamlnaUaB Amphibole layer line repeat diatance (Q.ftSnin).

v/s EOS spectrum conforming* to laboratory Ambiguous IdentlficaUon criteria observed. AMPHIBOLES F= Single Fiber (1-3 IntereecUoaa s 1-3 fl ben) Amosite 0= Bundle (>3 fl ban <t fiber diameter apart) C= Ctualer (>3 IntenecUone) g&fnm fllUr Crocidolite Non—asbestos —j stopping Rules: L__ Anthophyllite K= Matrix nSD= No structure. DetocLod ■ [ >90 a/C.O. or In l»t 4 C.O. Tremolite Non-Identified L:\nATA\PHIVATe\MlltXC\ CADDVEMa o/22/oa Actinolite

CITY_21MC100_003099472

NYC-WTC_000182560