NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB S'CUP 4- ; 0/26 '01 Las Sample Mo. c25 Ler T;zpe MCE 2 5 mm Ciienc SpL. Nc. rilcer Area ) 3 6 rnn ( Inscrumenc EM 13 GR2< Grid '-f .<? c- □l3k No.

Screen Magni 5icacion IS . 4*}OX (GOl Area mm '.-Oinmer.C s Acc. Volcace Nc. GC "c ce Ana race nc 72 s.'mm

GO. Structure Structure Type Length I.D. of Structure ------------- ; (Nonasb. No. ^0.5 urn No Coord. F B C M < 5 um » Sum Chrys. Amphibole Nonasb. lAmbig./NOi Elements) -3^ Z- 3

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(U___ !____ __ In Photo No. (from I in 5 asbestos- Identify all structurea using EDS Check diffraction for aabeatoa i I Store all unrepeated spectra containing samples) Grid acceptance:! structures up to 709/i5»m (let 4) <50X undisaolved fitter, overlapped or folded Struct = > Q.Sum <k > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas F B C J M > Sum to laboratory Identification criteria observed. ■Unuaed poruon For chryaoLlIa: Q.73nm iiipaeing for (020) rsflactioni, 0.33nm spacing for the layer Une repeat, streaking of niter Chrysotile 'Avoided portion of (110) and (i:30) reflections. of niter For amphtbolaa: 0.53nm layer Una repeat, and approx. PorUon of filter (2mm wide) 3.5 ratio of non-lwinned layer line spot apacinc to subject to examinsUan Amphibole layer Une repeat distance (Q.53nm).

vZ- CDS spectrum conforming to laboratory idenUrication criteria observed. j AMPHIBOLES Ambiguous Ps single Fiber (1-3 interaectlona s 1-3 fibers) Amosite 3s Bundle (>3 fibers <l fiber diameter apart) C= Cluster i>3 IntenecUons) 25mm niter ! Crocidolite Non-asbestos J stopping Rules: Anthophyllite Ms Matrix NSD= No Structures Detected >50 i/G.O. or in 1st 4 G.Q. n Tremolite Actinolite Non-Identified k\ DATA\PRIVATE\ MI KEC\ CADO'3‘EM3 9/22/90

CITY_21MC100_002849251

NYC-WTC_000209893