TEM air analysis results, Oct 21 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5737 - 10/21/01 Lab Sample No. 61832 Filter Type MCE 25 mm Operator Client Spl. No. 11 Filter Area 385 .Tim*2 Instrument I.D. EM 10 CRX Grid I.D. '^'70 Disk No. Screen Magnification IS,400X (GO) Area 0.01124 mm^2 Comments Acc. Volcage 80 kV No. GO co be Analyzed 4 ( 3.147 Struct. Corspd. co 70 5/mm^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 unn /

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Store all unrepeated spectra—^ Photo No. (from 1 in 5 asbestos- Identify all atructures ualng EDS Check diffracUon for aabeatoa containing samples) etrucLurea uo to 70a Z^m Grid acceptance:! (18t 4) Struct. = > O.Sum & > S:1 Aspect Ratio <50% undiaaolvecT filler, overlapped or folded <10% particulate coverage >50% coverage N= Nat Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. Unused portion For chryeoUla; 0.73nm spacing for (020) reflections. or niter Chrysotile O.SSnm apacing for the layer line repeal, alreaking Avoided portion of (110) and (130) reflections. of filler For amphiboles: O.sanm layer Une repeat, and approx. (2nim wide) 3.S ratio of non-tvlnned layer Une spot spacing le Amphibole layer Une repeat distance (0.53nm). CDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm flltar Crocidolite Non-asbestos C= Cluster (>3 interaectlona) ■ i Slopping Rulex; I--------- - Ms Matrix Anthophyllite NSDs No Slruclurei Detected >50 a/C.G. or in lai 4 C.Q. Tremolite Actinolite Non-Identified L'\ DATA\ privates MIKSC\ CADOVCMO 8/22/99

CITY_21MC100_003099684

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