NYC-WTC_000182515

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP K; 5509 - lO/OS/01 Lab Sample Ko. 60026 Filter T;/pe MCE 25 min Operator Client Spl. No. SHS-l>10-10/5-19 Filter Arsa 385 mm^2 Instrument I.D. EM LO CRX Screen Magnification 16,400X Grid I.D. Mi Disk No. (GO) Area 0.01124 mm*2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 4 ( 3.147 Struct. Corscd. to 70 s/nini~2.)

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

1 7

Store ail unrepeated spectra—^ Photo No. (from 1 in 5 aabenloo- Identify all atructurea using EDS Check diffraction for asbestos containing samples) Grid acceptance:! structures up to 7Da/i?>m (l«t 4) Struck 3 > O.Sum Je > 5:1 Aspect Ratio <50% undiasolveif Taler, overlapped or folded <IOX particulate coverage >QOX coverage Totals Ns Not Observed, (BDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares PoslUve diffraction pattern prcpertles conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. -Unused portion For ehryseUls: 0.73nm ■pacing for (020) reflections, O.SSnm spacing for Ihe layer line repeat, streaking of filler Chrysotile -Avoided portion of (110) and (130) reflecUone. of filter For amphiboles: Q.aSnm Layer Une repeat, and approx. Portion of niter {2mm wide) 3.3 ratio of non-tvinned layer line apot ipaeing to aubject to examinatian Amphibole layer Une repeat distance (0.&anm).

ZDS Spectrum conforming to laboratory Ambiguous Identification crllerta observed. AMPHIBOLES P= Slnjlo Fiber (1-3 Intersections = 1-3 fibers) Amosite B= Bundle {>3 fibers <1 fiber diameter apart) Cs Cluater {>3 interaectlona) SSmni niUr Crocidolite Non—asbestos -------- ’1* stoppin. Ruin: I----------- , Anthophyllite «= Matrix NSSs No Structursa Detected L\OATA\P!UVATE\MlKEC\CADD ’^E«a o/sa/M [ >00 i/C.O. ar In lit « 0.0. Tremolite Actinolite Non—Identified

CITY_21MC100_003099090

NYC-WTC_000182515