Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP : 5 -j ■' 21 / 01

Lab Sample Mo. 61832 Filter Type MCE 2 5 mn' Operate tL I .31ie.lt Dpi. Mo. Filter Area 3^5 mm Instrument I.D. Grid I-D. ^70 Disk No Screen Magnification :.o , 400X (GO) Area mm Comments Acc. Voltage 8 2 kV No. GC to be Analyzed _4 147 Struct. Corspd. to 20 s/mrrGL.:

Length I.D. of Structure EDS GO. ' Structure structure Type (Nonasb. No Coord. No. >0.5 um F B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) ?7-

3

Photo No. (from 1 i.n 5 asbestos- Identify all structures using EDS Check diffraction for asbesLoe Store all unrepeated spectra I containing samples) Grid acceptance:! structures up to TOb/Ait (let 4) <50% undiaaolveo ThL'erT overlapped or loided Stru:L = > 0,5um & > ful Aspect Ratio <10% particulate coverage >50% coverage Totals. Ns Not Observed (EDS spec'.rum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. -Unuaed portion i'or chrysotile: 0.73nm spacing for (OSD) reflecUona, or niur Chrysotile (i.33nm spacing for the layer line repeat, streaking -Avoided portion cf (HO) and (130) reneetions. of niter Fer amphiboles: O.SSnm layer line repeat, and approx. Portion of niter (2mm wide) 2.a ratio of non-twinned layer line spot spacing to subject to examination Amphibole layer Une repeat distance (Q.Sanm). './= EDS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite B= tiundle (>3 fibers <1 fiber diameter apart) Cs Cluster {>3 Intersections) asmra rilt.r Crocidolite Non-asbestos I_______ I Stopping Rules: i_____ Anthophyllite Us Matrix NSOs' No Structures Detected >50 i/C.O. or in Isl 4 G.O. Tremolite Actinolite Non-Idenlified L-\DATA\PRIVATE\MIKSC\CADD\TEU3 9/22/9B

CONFIDENTIAL, CITY_21MC100_003470286 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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