NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LP.£ GROUP #• 5^59 • 2

Gab Sample No. 52543 zer T/xe YCZ Tm ODcraccr rer.c Scl. No. Ft leer Area 3^5 mm'2 Inscrumenc 10 GRX Grid :.D. C'Lsk lVc. Screen Mayni: 15.4O0Z 'GO; Area -nm Conmen-s

ACC. Volcage go kV No. GC CO be AnalvzsG 4 ^21 "jct; . .C^rSDd S / TIT.

GO. Structure Slructur= Type Length I.D. of Structure EDS >0.5 um ——----- 1---------------- (Nonasb. No Coord. No. Fl B m cI < 5 um » Sum !Chrys. Amphibole Nonasb. iAmbig./ND Elements) / I Z- 3 £ J"

i I I I

H

c Photo No. (from I in 5 asbestos- containing samplea) Identify all structures using EDS Grid acceptance: i Check diffraction for asbestos structures up to 708/i?im (Ist 4) Store ell unrepeated spectra

Struct. = > 0.5um 4c > 5:1 Aspect Ratio <50% undiasolvea filter, overlapped or folded <IOX particulate coverage >5OX coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea Totals Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M Sum to laboratory identification criteria observed. Unused poruon For chrysoLllit 0.73nm apaeing for (020) rsnsetions. or niter Chrysotile 1 d.33nm spacing for the layer line repeat, streaking Avoided portion of (110) and (130) refleeUona. of niter For amphiboles: O.SOnm layer line repeat, and approx. (2mm wide) 3.3 ratio of non-tvinned layer line spot spacing to Amphibole layer line repeat distance (O.SOnm). EDS spectrum conforming to laboratory identification criteria obaerved. AMPHIBOLES J Ambiguous F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite ' 3= Bundle (>3 fibers <1 fiber diameter apart] Zflmm rutar CracidoiiLe ; Non-asbestos C= Clueter intereections) Us Uatrix ------ ; stopping Rules: ---------- ‘ Anthophyllite i NSD= Nn Structuree Delected >30 i/C.O. or in lot 4 C.O. j I Tremolite .. , , . , Actinolite Non-identified L\DATA\PRIVATE\HIKEC\CADD\rEM3 J/22/9a

CITY_21MC100_002849279

NYC-WTC_000209921