NYC-WTC_000202621

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. ' TEM ANALYSIS LAB GROUP ft' 5725 - 10/18/01 Liab sample No. 61663 FilLei Type MCE 25 mm ODeraCor .^pl . Mn. 06 Filter Area 385 mm Instrument I.E. EM 10 CRX Grid l.D Disk Na, Sci-een Macjnif icat_on 16,40OX (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO Co be Analyzed 4 ( 3.147 Struct. Corspd. tc TO 5/mm-~2.)

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

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1 Photo No. (from 1 in 5 aBbestos- Identify all atructurea u«ing EDS Chee : diffrecLion for asDestoa I store all unrepeated spectra containing Bamples) Grid acceptance;! structures up to TQs/i Z&m (IsL 4) <50% undisaoivecT filler, overlapped or folded Struct. = > O.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals Ns Not Observed (EDS specLrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas P B C M > Sum to laboratory identification criteria observed. For ehryaoUlw D.73nm aiipacinc (or (020) rvriaeUans, Q.53nm ipaoinc for the layer line repeal, alreaklni ^30) reflection*, of (110) and (IS 'Unused portion of filter -Avoided portion of niter Chrysotile "TN 1 1 Par amphiboles: O.SSnm layer line repeat, and approx. (2mm wide) a.a ratSB of non-twinned layer line spot ipacini te Amphibole layer line repeat distance (O.&Bnm). '= EDS spectrum conforminf to laboratory Ambiguous 1 identification criteria observed. AMPHIBOLES Fs Single Fiber (1-3 intersccUons s 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster ’>3 intersections) 2Smm filler Crocidolite Non-asbestos U= Matrix ,--------- 1 Stopping Rules: L_—_ , Anthophyllite NSDs No Structures Detected I >50 s/C.O. or in 1st 4 C.O. I Tremolite Non-Identified 'J Actinolite t.-\DAT*\PRIVATE\«IKEG\CADD'.TEU3 0/22/BB

CITY_21MC100_003273892

NYC-WTC_000202621