NYC-WTC_000188641

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5687 - 10/14/01 Lab Sample Nc. 61054 Filter Type MCE 25 mm Operator (if Client Spl, No. nshs-e:r-io/i3-oi Filter Area 385 mm^2 Instrument I.D. EM 10 CRX Grid I.D. Disk. No Screen Magnification 16,400X (GO) Area 0.0X124 mm"! Corr.ments. Acc. Voltage 80 kV Nc. GO to be Analyzed 4 3.147 Struct. Gorspd. to 70 s/mni^2. )

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

ns

— Photo Na. (from 1 in 5 aa »e»toa— Identify all atructurea uaing EPS Check diffraction for aabeatoa Store ail unrepeated spectra — containing aamplee) Grid acceptance;! atructurea up to 70a/Am {l8t 4) <S0X undiasolvea filter, overlapped or folded Struct. =s > 0.5um ft > 5:1 Aapect Ratio <10X particulate coverage >50X coverage Ms Not Obaerved (EDS epectruia or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming opaque, areas _ , _ -■ — F B C M > Sum to laboratory identification criteria obaerved. 'Unuaed portion For chry>oUl«J Q.73nm ■MOiiu for (020) r«naeUens, of niUr Chrysotile O.sanm apaclng for the layer line repeat, etreaklng lidsd porUon or (110) end (130) reflecUoni. of niter Por amphiboles: Q.83nni layer Une repeat, and approx. PorUon of filler (2mm wide) 3.5 ntio of non-twinned layer Une spot spacing to aubject to axomlnallon Amphibole layer line repeat distance (O.S3nm). EDS Bpeetrum conforming to laboratory Ambiguous IdenUneation criteria obaerved. AMPHIBOLES F= Single Fiber (1-3 Interaectiona ~ 1-3 fibere) Amosite Bs Bundle (>3 fibere <1 fiber diameter apart) ZSmtn flltar Crocidolite Non—asbestos

□ C= Cluiter (>3 intereeeUons) p Slopping Rules: L M= Matrix Anthophyllite NSn= No Struoturoa DoUctod >30 i/C.O. or In lot 4 G.O. Tremolite Non-Identified k\MTA\PIIIVATE\MIKIC\CADD\rEM3 0/22/08 Actinolite

CITY_21MC100_003082179

NYC-WTC_000188641