NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS lAE group 4^ 5650 - lO/U?/'/! Lab Sample No. 60~01 PiLCer Tyt-e MCE mm Ooeratox- is.it Spl. Nc. MBH5-5>5-10/9-14 filter Area 385 mm^2 'nstrumenc I.D. EM IC CRX Grid I.D VV < Disk Ko. Screen Macnificacion 16,400X iC-Oi 0-31124 mm*2 Comments Aco. Voltage 30 kV Nc. GO to be Analysed _4 ( 3 Corsod 70 sZmm*2.;

GO. Structure structure Type Length I.D. of Structure N or EDS >0.5 uxn (Nonaab. No, Coord. No. F B C M » Sum Chrya. Amphibole Nonasb. Ambig./ND Elements) < 5 um

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Photo No. (from I in 5 asiteatoa- Identify all sUuctureausinaKOS Check diffraction for aabeatos tore all unrepeated spectra containing samplea) Grid acceptance:! atructuree up to 70>/Arr (let e) <50X undissolved filter, overlappeti or fotdeo Struct. - > O.Sum k > 3:1 Aspect Ratio <tOX particulate coverage >6QX coverage Totals Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquaren Positive diffraction pattern properties conforming lueareaa F S C M > Sum to laboratory identification critaria observed. Jnuaed sorttea For chrysotile: O.TSnm apedns far (OSO) rsneeUens. or nitar Chrysotile 0.Mnm tpeoibg for tbs laytrllns repast, atreshint of (KO) snd (130) refieetJons. ...jided porUon of niter Fer srapblbolea: a.33nm layer Una repast, and approa. PorUon of fUter (2mm Vido) 3.a raUe of nan-twlnoed b] aub]ect tn Amphibole layor lino ropoot dliUnco ((KnlS). tuminsUan

EDS ■poclrum conformlnc to laboratory Ambiguous IdenUnoatioD ariteris observed. AMPHIBOLES F= Single Fiber (1-3 inUnectiona a 1-3 fibera) Amosite Bs Bundle (>3 fibers <1 fiber diameter sport) Cs Cluator (>3 IntermcUon*) ZSinm riilar Crocidolite Non-aabestos ,--------- ! Stopping Rules: I--------- - Anthophyllite Ha Mairis NSDa No Structures DeUcted j >M i/C.O. or in 1st 4 C.O. Tremolite Non-Identified ! kVDATAXPSIVaTZVMIKKGXCADirTEUa 9/22/98 Actinolite

CITY_21MC100_003274232

NYC-WTC_000202638