NYC-WTC_000188725

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS DAB GROUP #; 5609 - 10/05/01

Lab Sample No. 50053 FilCsr Type MCE 25 m Operator Clisnc Spl. No. 3HS-I>10-lQ/5-46 Fiibsr Area 335 mm*2, __ x-n

Instrument I.D. EM IQ ORK Grid I.D. Disk No. Screen Magnxfication 16,40CX ■GO) Area 0.01124 mm 2 Comments Acc. Voltage 9 0 kV No. GO to be Analyzed 4 147 Struct: - Corspd. to 70 5/Tim*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 2 / {; 7 3 II

2 II

Photo No. (from 1 In 5 aa leaLoa- Identify ell atructurea uatng EDS Check diffraction for aabeatoa Slore all unrepeated spectra — containing aamplea) Grid acceptance: I atructurea up to TOa/^m (l»t 4) <S0X undiaaolvetf filter, overlapped or foldea Struct. = > 0.5um fc > S:1 Aspect Ratio <10X particulate coverage >50X coverage Totals Na Not Obaerved (EDS apectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid aquarea Positive diffraction pattern properties conforming <SX holea or ooaaue arena F B C M > Sum to laboratory identification criteria observed. •UnuMd portion For chrysoUlt; Q.TSnm Bpacing for (020) raflseUona. or niur Chrysotile O.aOnm apacing for ths layer line repeat, streaking -Avoided portion of (110) and (130) reflscUona. or niLar For amphiboles: O.d3nm layer line repeat, and approx. ForUon of flltar (Zmm wide) 3.0 ratio of non-twinned layer line spot ipacing Lo aubjMt^to Amphibole layer Une repeat diatance (O.fi3nm).

\/= EDS apectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES Single Fiber (1-3 InteraecUona a 1-3 flbera) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluatar (>3 intanecUona) Z&mni fllLar Crocidolite Non—asbestos M= Matrix -------i' stopping Rut Anthophyllite NSD= No Slructurea OoLectod L\DATA\PRlVATX\MlKEC\CADD'^SMa [ >50 i/G.O. or in Tremolite Actinolite Non-Identified 8/22/M

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NYC-WTC_000188725