NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES, INC. TEM ANALYSIS LAB GROUP 4: 5650 - 10/09701 Lah Sample No. 50695 Filter Type MCE 25 nm Operator, C-isne Epi. Mo. MBKS-B>c-10/9-0. Filter Area 335 mrn/2

instrTjmenc I.D. SM XQ CRX Grid I.D Disk Ko Scraer: Magnification l'j,400X (GO) Arsa 9.01124 mm"2 Comments Arc. Volrage ao kv No. GO to be Anal/ted 4 [ 3.14" Sc-cucc. Corsoc. co 7C g/Tm^2.'

GO. Length I.D. of Structure EDS Structure (Nonaab. NoJ Coord. No. iO.S um F B C M < 5 iim Sum Chrys. Amphibole Nonaab. Ambig./ND Elements) .i

3 ,^<3

I Photo No. (from I in 5 aaboatoi- Identify all structures using BPS Check diffraction for asbestos tore all unrepeated spectra — containini samp lei) Grid acegBtanea:l structures UB to TQs/An (i»t ■»! <SOX undlsaoived filter, overlappedor folded Struct, s > Q.Sum Ie > 9:1 Aspect Ratio <10X particulate coverage >90X coverage Ns Not Observed (BUS ipectrum or diffraction pattem) at least 20 unfolded or overlapped grid squares Totals V= Positive diffraction pattern properties conforming <5X holes or opaque F B C M > Sum io laboratory idonUficatlon criteria observed. ’Unused portion For ohryaotils: a.7anm spacing for (020) rsflacUoas. of nitsr Chrysotile O.aSnm apecing far ths layer tlna repeat, streaking of (110) and (130) reflections. -Avoided portion a( filter For ampiiibeles: aSOnin layer tine repeat, and appros. Portion of nitar (2nun vids) a.S reUe of ann-twinned layer Uns spot ipacing U Amphibole layer line repeat distance (O.SSnm). ■uminaUon

vZ= EDS spectrum conforming to laboratery Ambiguous IdanUficatlon criteria observed. AMPHIBOLES Fo Sinclo Flbar (1-3 inUnecUons = 1-3 fibers) Amosite 3= Bundlo (>3 flbor* <1 fiber diameter apart) Mmm mUr Crocidolite Non—asbestos C= Cluster (>3 intersectlena) us Matrix N5D= No Structuroa OBtactad UXDAnXPWVATS^MJKSCXCAOOXreua c ------- 1 stepping Rules; 1----------- >d0 a/G.O. or in lit 4 0.0.

9/22/08 Anthophyllite Tremolite Actinaiitc Non—Identified

CITY_21MC100_003274221

NYC-WTC_000202627