NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS # ■

Ldc Samcie rilcer Tyoe yCs nm Client Spl. Me. Filcer .Ares 23* .-rr?' Z ns c rume nc Z. D £M 10 CRZZ Gric -13.< Me.

Screen MaanxficaCLon IS,400X ;GC; .Area 0 Commer.! Acc. Volcage 3 0 kV Me. GO ce be /zee

GO. Structure str-rt-" Trp« Length I.D. of Structure EDS >0.5 um ! ■ (Nonasb. No. Coord., No. Fl B!c Im < 5 um I Sum Chrys.f. Amphibole Nonasb. IA m b i g./Npj Elements) i i I

I i

‘ I Photo No. (from 1 in 5 asbeaLoa- Identifjf all atructurea uaing EDS Check diffraction for aabestoa JStore _______ M all jnrepeated spectra — containing samplea) Grid acceptance:! structures up to TOa/t^jm (lat 4} Struct. 3 > O.Sum <k > 3:1 Aspect Ratio <50% undisaolved Miter, overlapped or folded <10% particulate coverage >50% coverage Totals. N= Not Qbaerved (BOS spectrum ar 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. ■Unuaad portion For cbryaotlla: 0.73nm apactng for (020) reflections, of filler Chrysotile | 1 O.S3nm spacing for the layer Une repeat, atreaking t -Avoided porUon of (110) and (130) reflections. of filter For amphlbelee: O.SSnm layer line repeat, and approx. Portion of filter {2mm wide) 3.3 ratio of non-lvinned layer Une spot spacing to vuOiect to laminaLlan Amphibole I layer Une repeat distance (O.S3nm).

/= EDS apectrum conforming to laboratory idenUflcatlon criteria observed. ‘ AMPH1B0L5S i Ambiguous i F= Single Fiber (1-3 interaectlons = 1-3 flbera) AmoaiCe a= Sundle f>0 flbera <1 fiber diameter apart! ______________ 25mm filter Clutter (>3 intenecUona) Crocidolite { Non —asbestos; «= Matrix Stopping ftuies: i Anthophyllite ■ NSD= No Structurea Detected >50 j/G.O. or in lai 4 G.O. Tremolite ,. , , .... , Actinolite i Non-ldentified i L\DATA\PR!VATE\MIKEC\CADD\TEM3 3/22/90

CITY_21MC100_002849288

NYC-WTC_000209930