NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS Lab Samp Li- Nc-. 62542 See 3'in<

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Screen Magr.mcs’.ion 16 , 4 0ox Are?. mir. Comments Acc. Volracfe 3 0 kV Nc oe I 4 :or3cd 5: mm

Length I.D. of Structure EDS GO. structure ■j (Nonasb. No. ^0.5 um No Coord. f! b |c M < 5 um » Sum [Chrys.l Amphibole Nonasb. jAmbig./NPj Elements) I zi"-"

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i 1 I i I nn Photo No. (from 1 in S asbestos- ! I Identify all structures using EDS Check diffraction for asbestos store all unrepeated spectra containing samples) Grid acceptance:! structures up to TOs/tJim (lat 4) <S0X undiesolvea filter, overlapped or folded Struct. - > O.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals M= Not Observed (EOS spectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum to laboratory Identification criteria observed. •Unused portion of filler Por chryMllla: O.TSnm ■,loactng for (020) rensetiona. O.sanm spacing (or lh< layer line repeat, streaking Chrysotile // / 'Avoided portion of (110) and (K,30) refleeuons. \ H of filter For amphiboles: O.sanm layer Une repeat, and I /Portion of nitar\ ' (2mm Vido) 3.3 ratio of non-tvinned■ •layer ••line ipot spacing to , I (Ubject to [ 1 Amphibole layer line repeat diatanca (0.83nm). / = EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. .AMPHISOLES F= Single Fiber (1-3 intersections - 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 25mm fUlar Crocidolite . Non-asbestos Ms Matrix _____ stopping Sulea: ■ , —- Anthophyllite , L >30 «/G.O. ar »n lat * G.O. SSD- No Structures Detected Soliu I Non-Identified L;\DATA\?RIVATE\ M1KSC\ CADD\rEM3 9/22/08

CITY_21MC100_002849278

NYC-WTC_000209920