NYC-WTC_000188485

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP 5753 - 10/30/01

Lab Sample No. 62737 Filter Type MCE 25 mm Ooeracor Client Spl. No. Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. -AM— Disk No. Screen Mac?ni f i caC ion 16.400X (GO) Area 0-01124 m-T2 Comments Acc. Voltage 8 0 kV No. GO to oe Analysed _4 ( 3.147 Struct. Corsod. Lo 70 s/mm^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 3“^ / 3' 3

Store all unrepeated spectra—^ Photo No. (from 1 in 5 asbestos- Identify all atructurea using EDS Check diffraction for asbestos containing samples) Grid acceptance:! structures up to 70s/^in (1st 4) <S0X undiaaolved niter, overlapped or folded Struct = > O.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totals Not Observed (EDS spectrum or diffraction pattern] at least 20 unfolded or overlapped grid squares Poaitlve diffraction pattern propertiea conforming <5X holes or opaque areas F B C M > Sum to laboratory identification criteria observed. ■Unuaed portion For ehryaotlla: Q.Tanm ipacinr for (020) reflecUena, of niter Chrysotile Q.SOnm apaclng for the layer line repeat, atreakinc ‘Avoided portion of (110) and (ISO) refteeUons. of niter Por amphlbolea: O.SSnm layer Une repeat, and approx. Portion of filter (2mm vlde) 3.5 ratio of non-lvlnned layer line spot spacing to aubjeet to examlneUon Amphibole layer Une repeat diatance (O.sanm).

EDS spectrum conforming to laboratory IdenUhcatlon criteria obaerved. amphiboles Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite 8= Bundle (>3 fibera <1 fiber diameter apart) C= Cluster (>3 intersections) _______________ ,26mm fllUr rT ' _ I Crocidolite Non-asbestos M= Matrix 5----------- ’ Stopping Rules: 1-------- Anthophyllite NSD= No Structures Detected [ »/G-O- or to lat 4 G.O. Tremolite Actinolite Non-ldentified L:\DATA\PRIVATE\MIKEC\CADD\XEM3 8/22/06

CITY_21MC100_003081500

NYC-WTC_000188485