Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP S

La)D Sample No. blH. nicer Type MCE 25 rrm Operator /if Clien- Sol No. 8 er Area 3-5 Inszrumenc I.D. EMH URX Grid I.D. ^^6 Disk, No

Screen Magnification !€>. '^ocx (GO) Area 0 . 31124 mm"! Comments Acc Volcage 80 k\ No. GC co De A.naiyced 147 SCrucc CorsDd s / mm'

GD. 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)

//£) TgT < 5 um / .EZ 7 ■? /! s //

Store all unrepeated spectra--^ PhoLO No. (from 1 in 5 ashestoa- Identify all airucturea using EDS Check diffraction for aabeatos containing samples) Grid acceptance:! structures up to TOs/ifim [let 4) <50% undisBolved niter, overlapped or folded Struct. = > Q.5um k > 5:1 Aspect Ratio <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory Identification criteria observed. ■UnuB«d portion of filler Fer chrysotile: O.?3nm spacing for (OSO) reflections, D.53nm spacing for the layer line repeat, streaking Chrysotile ■Avoided portion ef (110) and (130) reflecUons. or nitxr For amphiboles: D.S3nm layer Une repeat, and approx. Portion of niter {2mm wide) 3.5 ratio of non-l«lnned layer line spot spacing to lubjecl to axaminalion Amphibole layer Une repeat distance (O.SOnm).

/= EDS spectrum conforming to laboratory denlincatian criteria ooserved. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections s 1-3 fibers) Amosite B= Bundle f>3 fibers <l fiber diameter apart) Cs Zluster (>3 intersections) 25mm filLar Crocidolite Non-asbestos J stopping Rules: L^___ Us Matrix Anthophyllite >50 s/C.O. or in Isl 4 C.O. I NSD- No Structures Detectfd Tremolite j Non-IdenLified L;\DATA\PRIVATr\MlKBC\CADiyt7EM3 9/22/98 Actinolite

CONFIDENTIAL, CITY_21MC100_003470330 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176456