NYC-WTC_000188683

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5737 - 10/21

Lab Sample Mo. 61637 Oceracor /AC/-’ Client Spl. No. 16 Filter Area 385 mm Instrument l.D. EM 10 TRY Grid I.D Disk No. Sci-een Macmification 16,400X ■;gO; Area 0.01124 mm Comments Act. Voltage &C kV No. GO tc be Analyzed 147 Struct. Corsod. bo 70 s/mm'^2.)

Length l.D. of Structure EDS GO. Structure Structure Type (Nonasb. No, >0.5 um No Coord. F B C M < 5 um :> 5um Chrys. Amphibole Nonasb. Ambig./ND Elements)

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Store all unrepealed spectra—^ Photo No. (from 1 in 5 asbestos- identify all structures using EDS Check diffraction for aabeatoa containing samples) Grid acceptancg;l structures : ud Lo TOs/Am (1st 4) <50S undisaolved filter., overlapped or" folded Struct. = > Q.5um & > 5:1 Aspect Ratio <10X particulate coverage >50Z coverage Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > Sum lo laboratory Identification criteria observed. ■Unused portion For chrysotile: 0.73nm spacing for (020) reflections, O.SOnm spacing for the layer line repeat, su-eaking of filter Chrysotile -Avoided portion of (110) and (130) reflections. of filter Por amphiboles: 0.53nm layer Une repeat, and approx. Portion of filter (2mm wide) 3.5 ratio of non-tvinned layer Une spot spacing to subject to axamination Amphibole layer Une repeal distance (O.S3nm).

EDS spectrum conforming to laboratory idenlification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 Interaections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster {>3 intersections) 2Smm filter Crocidolite Non—asbestos -------- 1 Stopping Rules: Us Matrix Anthophyllite NSD= No Structures Detected [ >60 b/C.O. or in 1st 4 G.O. I Tremolite Actinolite Non-ldentified L\DATA\PRIVATE\M1KEC\CADDVEU3 8/2Z/flB

CITY_21MC100_003082488

NYC-WTC_000188683