NYC-WTC_000188632

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP #: 5662 - IQ/lO/Ol Lab Sample No. 60806 Filter Type MCE mm

Client Spi. No NSH5-EIR-10./10-07 Fl It sr Area 3 8 5 mrr" 2 Instrument I.D. EM IC CRX Grid I.D. MLCz Disk No. Screen Magnificacion 16,400X (GO) Area 0.01124 mm Comments Acc. Voltage 8 0 kV No. GO be be Analyzed 4 3.147 Struct. Corsz’d- to 70 s/tnm'^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) < S um /

o

Photo No. [from 1 in 5 asbestos- identify all atructurea uaing EDS Check diffraction for asbestos Store all unrepeated spectra — conUiining samples) Grid acceptance: I structures up to 70s/ifim (let 4) <50X undiiaolvea fUter. overlapped or folded Struct - > O.Sum de > S:! Aspect Ratio <I0X particulate coverage >50X coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <SX holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory Identification criteria observed. Unused porUon Por ehrysoUle: Q.73nm apaeins for (020) rsflections. of niter Chrysotile 0.53nm spacing for the layer line repeat, streaking -Avoidod portion ef (110) and (100) reflecUona. of filter Per amphiboles: O.OSnm layer line repeat, and apprex. Portion of filler (Smin wide) 3.5 ratio of non-tvinned layer line spot spacing to aubject ta ■xatninaUon Amphibole layer Une repeat dlsUnee (O.SOnm). i/s EDS spectrum conforming to laboratory Ambiguous idenUfication criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 interasetiens) ZSmin niUr Crocidolite Non-asbestos Ms Matrix r ------- ISUppinc Rules: I--------- - Anthophyllite NSD= No Structurea Detected >50 s/G.O. er In 1st 4 C.O. Tremolite Actinolite Non-Identified ; U\DATA\PRIVATB\MIKBC\CADDVSMa 8/22/08

CITY_21MC100_003082101

NYC-WTC_000188632