NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES. INC. TEM ANALYSIS LAS GROUP 5650 - 10/09/Ql Tab .Sample No. 50639 Filter Type MCE 15 inm OperacQi; Client 3pl. Mo. MBHS-Bao-lQ/9-07 Filter Area 3S5 mtn^2 Inscr-jjnenc. I.D. EM 10 CRX Grid I.D. 015k Mo. Screeii Macnif i^aiLon IG , 400X (GOI .Area 0.01124 inm*2 Comments Acc. Voltage 3 0 kV No to be Analysed 147 Strucc. Corspd. to 7Q

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

/I V 5^

Photo No. (from I in 5 as iflstoB- Identify ail structures using BPS Check diffraction for aabealOB Store all unrepeated spectra— containinf samples) Grid accaDLance:l atructuiires up to 70a/Ain (l»t 4) <S0X undiasolved niter, ippeT^ folded overin] Struct = > a.Sum A > 5:1 Aspect Ratio Totals <10X particulale ooveraie >3036 coverage N= Not Observed (EDS speetrum ar dlffraeUon pattern) at least 20 unfolded or overlapped grid aquares PaeiUvB dlffraeUon pattern properties eonformlni b» i« ir opaque areae F B C M > Sum to laboratory Identification criterln observed. For ehryaeuiei O.Tanm spaclna for (OSO) reflections. «< niter Chrysotile 0.aanm tpaeu&c for the layer line repeat, atroaklac -Avoided portion of (tie) and (lao) mneeUOM. of niter For amphibolM! O.SSnm layer line repeat and approx. (Smm «Ue) 3.5 ratio of non-twlnned layer line spot apoelna to Amphibole layer line repeat diataaeo (O.a3nmj. (/= SDS apectrum conforminc to laboratory Ambiguous identificatian criteria observed. AMPHIBOLES Fs ainite Fiber (1-3 Intenections = 1-3 fibers) Amosite a= Bundle (>3 fibers <1 fiber diameter apart) amm niUr Crocidolite Non-asbestos G= Cluster (>3 intersecUons) ,--------- i SUppinf Ruloa: I------- Us Matrix Anthophyllite I >60 t/G,O. or In let 4 0.0. Tremolite NSDs No Slructurea Detected Nan—Identified U\D*TA\PS«VATS\MHaC\CJU)0\r2«3 9/S2/0a Actinolite

CITY_21MC100_003274225

NYC-WTC_000202631