NYC-WTC_000188484

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP tt: 57S5 - lU/28/ul Lab Sample No. 52413 Typi? MGF. 2 5 mm Operator Client Spi. No 4 Filler Area 385 [nm"2 Instrument I.D EM 10 CRX Grid I.D. ___ Disk No. Screen Magnification 16,400X (GO) Area 0 . 01124 mm"2 Comments Acc. Voltage 8 0 k,V No. GO to be Analyzed _4 ( 3.147 SDrucb. Corspd. bo *^0 s/tnm'^2.)

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

2^ X'"'. -3

Photo No. (from 1 in 5 asbestos­ Identify all structures uaing EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: I structurea up to 70g/i^n (let 4) <S0X undisaolved filter^ overlapped or folded Struct = > O.Sum & > S:l Aspect Ratio <tOX particulate coverage >50X coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or ooaaue areas F B C M > Sum to laboratory identification criteria observed. •Unused portion Por chpyaoUia: O.TOnm spaelns for (020) reflectlonB. of niter Chrysotile O.SSnm specing for the layer line repeat atreakinc •Avoided portion of (110) and (ISO) reflections. of niter Por amphiboles: O.oanm layer Une repeat, and approx. Portion of Miter (2mm vids) 3.5 ratio of non-Lvinned layer line apot spacing to subject to examinaUan Amphibole layer Uns repeal distance (0.53nm). EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections s 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) ZSmni niLar Crocidolite Non-asbestos I--------- 1 supping Rules: 1--------- - Anthophyllite Ms Matrix NSD= No Structures Detected >50 a/C.O. or in lat 4 C.O. Tremolite Non—Identified Actinolite L:\DATA\PRIVATE\MIKBC\ CADDVEM3 9/22/9fl

CITY_21MC100_003081434

NYC-WTC_000188484