NYC-WTC_000232452

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. TEM ANALYSIS I LAB GROUP 5515 - 09/17/01

Lab Sample Mo. 59Q4S Filter T^-pe MCE 25 mm Operator. Client Spl, Mo. 02L Filter .Area 336 iTnn'2 Instrument I.D. EM 10 CRX Grid I.D. Disk Mo.

I Screen Magnification 16,40QX Acc. Voltage 3 0 kV (GO) Arsa 0.01124. mm"2 No. GO to be Analyzed 26 Comments (20.457 Struct. Corsod. to 70 s/mm^2.)

Length I.D. of Structure EDS GO. Structure structure Type (Nonasb. No. 5^0.5 um No Coord. F B C M < 5 um 5. Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) 1 X2. t

I /=>/- J 3-(39 I -3— iz Q. HE xfzJ -Z zz 7 L/ /a £Z

I /X

I I Identify all atructurea using EDS Photo No. (from I in 5 asbestoa— Check diffraction for asbestos Store all uarepeated spectra containing samples) Grid acceptance: i jtructures up to 70a/t?in- (let ♦) Struct. - > Q,5um & > 5:1 Aspect Ratio <50% undlaaolved filter^ overlapped or folded <10% particulate coverage >50% coverage Na Not Observed (EDS spectrum or dlffrscUon pattern) at least 20 unfolded or overlapped grid squares Totals <5% holes or opaque areas Positive diffraction paLtarn properUes confarming F B C M > Sum to laboraLory Identification criteria observed. 'Unused portion For chrysotile: O.TSnm loaclna for (020) raflacLlona. of niter O.Sdnm vpacinc for Iha layer line repeat, ■treaking 'Avoided portion Chrysotile 2 5 /e? of (110) and (100) reflections. of niter For amphlboiei: O.Mnm layer Une repeat, and appros. Portion of niter (2mm wide) 3.5 ratio of non-lwlnned layer line ipot apaclng to •udject to axaminatlon Amphibole layer line repeat dletance (O.SOnni).

I vXs EDS fpectrum conforming to laboratory idenUfloation criteria observed. AMPHIBOLES Ambiguous Fa Single Fiber (1-3 InLenecUons = 1-3 fibers) Amoaile B= Bundle (>3 fibers <1 fiber diameter apart) 2Smm niL«r Crocidolite Non-asbestos Z mISu ------ 1 3Uyp.„. RUI..: I___ Anthophyllite

I NSD= no SUuoture, DelocUid =*“ Tremolite Actinolite Non-Identified U\DATA\PRIYATE\MIKKC\CADOVX« 9/22/08

CITY_21MC100_0 10237410

NYC-WTC_000232452