TEM analysis data sheet, sample 59741, September 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP #: 5579 - 09/2^/01

Lab Sample No. 59741 Filter Type MCE 25 mm Operator Client Spl. No. T18 Filter Area 335 min'll Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification' 16,4 OQX (GO) Area 0.01124 mm^2 Comments

Acc. Voltage 8C kV No. GO to be Analyzed ( 4.721 Struct. Corspb. to 70 s/mm^2.)

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

Y.:J

;''O

Store ail unrepeated spectra-^ Photo No. (from 1 in 5 aabealoa- Identify all structures using EDS Check diffraction for asbestos containing samples) Grid acceptance:! structures up to 70«/&tn (l>t +) n Struct. = > O.bum & > 5:1 Aspect Ratio <50% undiaaolved filter, overlapped or folded Totals <10X particulate coverage >50X coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5X holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. Inuaed portion of niter A For chrysotile: 0.73nin spacing for (020) reflections, O.Sanm spacing for the layer line repeat, ttreakinc Chrysotile kvaided portion of (110) and (130) reflections. of niter Por amphiboles: 0.53nm layer line repeat, and approx. Portion of filter (2mm wide) IJ 3.5 ratio of non-twinned layer line spot spacing to aubject to examination Amphibole layer Une repeat distance (0.a3nm).

(. i EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersectiona = 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) C= Cluster <>3 intersectloni) 25mm filter Crocidolite Non-asbestos J Stoppinf Rules: , Anthophyllite Ms Matrix >50 s/G.O. or in lat 4 C.O. Tremolite NSD= No Structures Detected Actinolite Non—Identified L:\DATA\PRIVATB\MlKEC\CADD\rEM3 9/22/98

NYC-WTC_000174853