NYC-WTC_000209888

NYC 9/11 Public Portal Document ATC ASSOCIATES INC. TEM ANALYSIS 5 nad Sampl= Ne 22533 Filter Tyre MCE 25 mm Operator wae jP Client Spl. No. 27 Filter Area 235 mm72 Instrument I.D. EM ly CRX Grid [.D. 5 Sisk Ne Screen Magnification 15.400x% (GC; Area Comments Act Voltage eo kV Ne. GO to be Analyzed _& 4.722 Struct. corseadooi2 7) s/mm*? GO. [Structure Structure Type Length I.D. of Structure N or\/ (Nona ’ Nonasb. 20.5 um | . . ; No] Coord. No. FIBICIM|) 25 um 2 Sum |Chrys.| Amphibole | Nonasb. |Ambig./ND Elements) ALS T “~~ Me FASE | ~ ~Josjevrl ae G|4A2" | —x | } Li hope | f i } a \ ‘ | u jo Photo No. (from | in 5 asbestos- containing samples) Struct. = > O.5um & > 5:1 Aspect Ratio N= Not Observed (EDS spectrum or diffraction pattern) Identify all structures using £DS structures up to 70s/mm (tat 4) Tiller, overiapped or folde <10% particulate coverage >50% coverage FB [<5%_holes or opague areas Check diffraction for asbestos Grid acceptance: <50% undissolved at least 20 unfolded or overlapped grid squares Store all unrepeated spectra —~ Totals C M_ > Sum Vil Positive diffraction pattern properties conforming to laboratory identification criteria obverved. ‘Unused portion For che le: 0.73nm « for (020) reflections. of filter i 0.53nm ‘spacing for Lhe layer line repeat. streaking ‘Avaided portion Chrysotile of (110) and (130) reflections. of fitter Yor amphitotea: 0.53nm layer line repeat, and approx. Portion of filter (2mm wide! : 41.5 ratio of non-twinned layer line spot spacing to subject to ) Amphibole layer line repeat distance (0.53nm). examination “ss EDS spectrum conforming to laboratory Oooo i identification criteria observed. AMPHIBOLES — Ambiguous Fs Single Fiber (1-3 intersectiona = 1-3 fibers) Amosite 1 = bundle {33 ‘bers ‘i fiber diameter apart) 2Smm filter Crocidolite | Non-asbestos we Metron nterectiona) ——— Stopping Rules: Anthophyllite | = . 250 4/G.0. or in ist 4 G.0. ; Tremolite ae NSD= No Structures Detected i Actinolite | Non-Identified L:\ DATA\ PRIVATE\ MIKEG\ CADD\TEM3 9/22/98 ‘ NYC-WTC_000209911 CITY_21MC100_002849269