NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GROUP # Lab Sampis Mo. er T:/pe MCE mm Operas-. .ent Sei. Me Fiicer Area 385 mm" Inscrumerc I EM CRX Gr.d I.D ' IC Orsk Nc Screen Magniticarror. 16 40OX (GC! Arsa T . 01124 mm,' Commencs Acc. Voltage 9 0 kv N" . GC co be Anai'/oed ^21 Ssr-j c -0 S mm

GO. Structure Structure Type; Length I.D. of Structure I ^0.5 um -------------- 1---------------- 1 (Nonasb. No Coord. No. F B C M! <5 um Sum Chrys.i Amphibole Nonasb. !Ambig./NDi Elements)

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i ! i I [ Photo No. (from 1 in 5 aibeatos- identify all structures using EDS Check diffraction for aabcatoa Store all unrepeated spectra containing samples) Grid acceptance; I structures up to TOs/t^m (lat 4) <50X undiaaolvea filter, overlapped or folded Struct = > O.Sum it > 5:1 Aspect Ratio <10X particulate coverage >S0X coverage N= Not Observed (SOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <SX holes or opaque areas Positive diffraction pattern properties conforming F B C M > Sum to laboratory Identification enteria observed. -Unuaad porUan For chrysotile: 0.73nm inaeinc far (020) rsnscLlana. Qf niter Chrysotile j O.SOnm spacing for the layer line repeat, streaking of (HO) and (100) reflecUons. 'Avoided portion ar niter For amphiboles: O.OOnm layer Une repeat, and approx. of filter (2mm vtde) 3.3 ratio of non-twinned layer Une spot spacing lo subject to aiAmlnation I / i Amphibole i layer line repeat disunce ^0.33nm).

EDS spectrum conforming Io laboratory r Identification criteria observed. AMPHIBOLES ! Ambiguous j P= Single Fiber (1-3 intersections = 1-3 fibers) Amosite 3= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 23mm fillar Crocidolite Non-asbeatosI M= Matrix Slopping Rules: -------- Anthophyllite 1 NSD= So Structures Detected >30 t/C.O. or in 1st 4 3.0. Tremolite i ,, , . ..... Actinolite ! Non-ldenlified j 1.;\DATA\PR1VATE\MIXHC\CADO\TEM3 0/22/98

CITY_21MC100_002849256

NYC-WTC_000209898