NYC-WTC_000232453

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS I LA3 GROUP tt; SS15 - 09.^17/01

Lab Sample No. 59050 Filter Type MCE 2 5 mni Operator Client Spl. No. 031 Filter Area 385 mm"2 inscruaienC I.D. EM 10 CRX Grid I.D. Disk No.

I Screen Magnification 16,400X Acc. Voltage 80 kV (GO) Area 0.01124 mm*2 No. GO to be Analyzed 15 Comments (11.802 Struct. CorsDd. to 70 s/mni'^2.)

Length I.D. of Structure EDS

I structure structure Type GO. N or >0.5 um (Nonasb. No Coord. No. F B C M < 5 um > Sum Chrys Amphibole Nonasb. Ambig./ND Elements) /

I ^Y - 7 Y-

I o I I I I I I Photo No. (from I In 3 aa icstos- identify ail atructurea using SDS Check diffraction for aabeatoa Store all unrepeated spectra-^

I containinf aamplca) Grid acceptance:! structures uq to 70a/i?im (lat 4) <S0X undiaaolvetf filter, overlapped or folded Struct. ~ > 0.5um b > 5:1 Aspect Ratio <IOX particulate coverage >5QX coverage Ns Not Obaerved (EDS spectrum or diffraction pattern) at [oaat 20 unfolded or overlapped grid aquarea Totals <5X holea or opaque areaa F B C M > Sum PoaiUve diffraction pattern properties eonformlnt to laboratory Identification criteria observed. ■UnuBed portion

I I 3 of niter Por chrjrsoUls: O.Tanm ipacina for (020) renecUona. 0.53nm Bpacinf for the layer line repeet. aixeaking -Avoided porUon Chrysotile > of (Ito) and (130) refleeUona. or niter For amphlbolet: O.Mnra layer Une repeat, and approx. Portion of niUr ' (2mm Vido) □.a raUo of non-twtnned layer Une spot tpacing to (Ubjeet to examination Amphibole layer Une repeat dleteaca (O.SOnm).

EDS apectrum conforming to laboratory Identification criteria obaervod. AMPHIBOLES Ambiguous P= Single fiber (1-3 IntersecUons » 1-3 flbera) Amosite 9= Bundle (>3 fibers <l fiber diameter apart) a= “SJu 25mm fllUr ______ I SUppIn. Rule: I--------- Crocidolite Non-asbestos Anthophyllite NSD= No SLructuru BoLootod | | Tremolite Non-ldentified Actinolite U\DATA\PR1V*TE\1<IKSC\CADD'<JK1I3 0/22/08

CITY_21MC100_0 10237412

NYC-WTC_000232453