NYC-WTC_000188723

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP if: 5639 - IQ/'QS/Ol Lab Sample No. 60044 Filter Type MCE 25 mm OperaiLor Client .5pl. No. SHS-l>lQ-10/5-3C’ Filter Area 385 mm"2 Ins-zrumenc I.D. EM IQ CRX Grid I-D. Disk >Jo. Screen Magnification 4 0 OX (GO) Area 0 . 01124 mm"2 Comments Acc. Voltage 8 0 kV No. GO Co be Analyzed 147 Struct. Corspd. Do 70 s/inm^2.)

GO. Structure Structure Type Length I.D. of Structure N or EDS >0.5 um (Nonasb. No Coord. No. F B C M Sum Chrya Amphibole Nonasb. Ambig./ND Elements) < 5 um I 2 7 (f " Pz //

J 1 Photo No. (from 1 in 5 asbeatoa— Identify all structures using EDS Chee c diffraction for asbeatoa store ail unrepeated spectra containing samples) Grid acceptance:! structures up to 7Qs/&m (1st 4) Struct = > 0.5um & > 5:1 Aspect Ratio <S0X undlasolvea filter, overlapped or folded <10X particulate coverage >50% coverage Ns Not Obaerved (EDS •pectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Poaitlvo diffraction pattern properties conforming <SX holes or opaque areaa________________________ F B C M > Sum to laboratory Identification criteria obaerved. -UnuMd portion For chryaotilef O.TSnm apaeins for (020) renecUena, of nitar Chrysotile O.aanm vpaoinc for the layer line repeat, atroakinc 'Avoided portion of (no) and (130) reflecUona. of niUr For amphiboles: 0.53nm layer Une repeat, and approx. Portion of niter (2ram vide) 3.3 ratio of non-twinned layer Une ipot apacing to lubject to sxainlnntlon Amphibole layer Une repeat distanee (O.S3nm). EDS apectrum conforming to laboratory Ambiguous Identification criteria obaerved. AMPHIBOLES F= Single Fiber (1-3 InUraecUona a 1-3 fibers) Amosite Ssa Bundle (>3 fibera <1 fiber diameter apart) ____________ niter C= Cluster (>3 intersections) FT . 1 Crocidolite Non—asbestos g, Matrix {--------- - Stepping Rule.; 1--------- , Anthophyllite NSDs No Structures Detected | >^0 a/G.O. er in lat 4 C.Q, i Tremolite Actinolite Non-Identified U\OATA\P!UVATE\MIKEC\CAOD>^EM3 9/22/90

CITY_21MC100_003082841

NYC-WTC_000188723