NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS GROrJF # Lab Sample Me Operate .‘snr, 3p - . Me . Area 5 -nm

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.Arc. Vo^zage 30 kV Me. GO cc be Analyzed rsed

Length I.D. af Structure EDS GO. structure Slruclure Type j N or ------------------- j---------------- J---------------- : (Nonasb. No. I >0.5 um > 5um ichrys.i Amphibole I Nonasb. Ambig./NDl Elements) No Coord. fIb C Ml <5 um ! I G?

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i I ! ■ Photo No. (from I in 5 asbestos- Identify all structures using EDS) Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance:! structures up to 70a/i4im flat 41 <30% undiaaolvea filter, overlapped orHoided Struct = > 0.5um & > 3:1 Aspect Ratio <10X particulate coverage >5OX coverage Totals. N= Not Observed (KDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areaa F B C M > 5um to laboratory identification criteria observed. Unused portion Por chrysotile: 0.73nm ipaeing for (020) rsflsctions. 0.53nm spacing for the layer line repeat, Btrsading of niter -Avoided portion Chrysotile 1 of (HO) and (ISO) reflecUona. Per amphiboles: 0.93nm layer line repeat, and approx. 3.5 ratio of non-twinned layer line spot spacing to of niter (2mnt wide) Amphibole ------ i layer line repeat distance (O.SSnm).

= EDS spectrum conforming to laboratory identification critaria observed. : AMPHIBOLES Ambiguous j pa Single Fiber (1-3 intersections = 1-3 fibers) Amosite 3= Bundle f>3 fibers <1 fiber diameter apart} C- Cluster i>3 intersections} 25mm filter Crocidolite Non-asbestos! Us Matrix «—- SLopptnc Rutea: -------- ’ Anthophyllite , L NSD= 3o Sbructurea Detected >50 i/C.O. sr in tat 4 C.O. Tremolite xr •. .-e- u ! Actinolite i Non-identified ! L\0ATA\PHtVATE\MlKBC\CA00^TCM3 9/22/98

CITY_21MC100_002849282

NYC-WTC_000209924