Asbestos TEM analysis results, New York City schools, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA£. GROUP 5 73 0 19 C1 bat Sample No. 62 Ype MCE 2 5 mn Coera^or Client: Spl _ No. 33 Fiicer 385 mm 2 In.scrtinenc I.D, EM iv -Ri: Gric I.D. Disk No. Serpen Magnification lo,400X (GO) Arsa 0.01124 mp/2 Comments ACC. Voltage 3C k'V Nc. GO cc be .A.nalyzed 4 14"^ .Scruct. Corspd. to 70 s/mm"'2

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

1

—Photti No. (from 1 in S aabeatos- Identify all etructurea using SDS Check diffraction for aabestoa Store all unrepeated spectra containing samplesi Grid acceptance:! ■trueturea up to 70«/^im (l«t 4) <50X undiiBoivea filLerr overlapped or foidec Struct = > O.Sum k > 5 1 Aspect Ratio <IOX particulate coverage >50X coverage N- Mot Oboerved (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 Ui laboratory identlficatlan critsria observed. ■UnuB*d portion Far ehrysoUlo: 0.73nm asaeiar for (0201 re/locUons, of niter Chrysotile O SOnm apaclnf for the layer Uns repeat, sLreaklac -Aralded porUon of (110) and (1301 raflecUoru. of filler /PorUon of flller\ For amphiboles: 0,S3nm layer Iios repeat and approx., (Hmm wide) 3.S ratio ef non-t«inned layer line spot spacing is { I .SSStii ) Amphibole layer Una repeat distance (Q.53nm). EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous Fs SIncle Fiber (1-3 InLenecUani « 1-3 fiben) Amosite B= Bundle (>3 fiben <1 fiber diameter apart) Cs Cluster (>3 IntersecLions) 29inin filler Crocidolite Non—asbestos ------- 1'' Stnpplni Ruler: I------ Anthophyllite M= H.tpli NSD= No Strueturea Detected >30 l/C.O. or In III 4 G.O. Tremolite Actinolite Non-Identified L\DA7A\FR:VATE\M1KSG\CADD^M3 8/22/«a

CONFIDENTIAL, CITY_21MC100_003470184

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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