NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GF.OTP 4

Lac Samcia Nc. Liter Type .Mc: Tim -P-i L Mo . Filter Area 3S5 ™~2 Grid I.D. '“f N'’h xnscrumenc -.D. EM ID C?.X

Screen Magni;irarion 16.400X (GO) Area 0 0L mm' Coinmen-S

Aco. Voltage 3 0 kV No, GO co be Analyzed S mm'Z

Length I.D. of Structure ! EDS I GO. structure Structure Type J (Nonasb. I No, Coord. No. fTb m cI >0.5 um < 5 um 5. Sum Chrys. Amphibole ' Nonasb. iAmbig./NDi Elements)! ^3 2. 3

J I

! ' 1 ! ' Photo No. (from 1 in S asbestos- I i Identify all atructurea using EDS ! Check diffraction for asbestos I J____ I____ Store all unrepealed spectra containing samples) Grid acceptance:! atructurea up to TOa/Am (1st 4) <50X undisBolvea filter, overlapped or folded StrucL = > Q.3um k > 5;l Aspect Ratio <10X particulate coverage >5QX coverage Ns Not Observed (EOS spectrum or diffraction pattern) al least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <SX holes or opague areas F B C M Sum to laboratory Identification criteria observed. 'Unused portion of niter i For chrysotile: 0.73nm ipacing for (020) raflecliona. Q.S3nm spacing for the layer line repeat, atreaking Chrysotile 'Avoided portion of (110) and (130) reflections. of niter Por amphiboles: O.Mnm layer line repeat, and approx. Portion at filter !2mm wide) 3.3 raUo of non-twinned layer Une spot spacing to ■ubject to axanunation I ), Amphibole layer Uns repeat distance (0.33nm). /- EOS ipectrum conforming to laboratory Ambiguous | H identification criteria observed. ! .\MPH1BOLSS ! F= Single Fiber (1-3 Intersections = 1-3 ribers) Amosite ( 9= Bundle (>3 fibers <l fiber diameter apart) C= CluiUr (>3 inter*ecLion»l 2Smm filler ! Crocidolite ; Non-asbestosi ----------- Sloppini Rules: —_ i AnthophylliLs ■ j- Matrix NSD= No Structures Detected >50 t/O.O. or in lot 4 G.O. ' Tremolite , .. . , x ' Actinolite Non-identified ; L\DATA\PRJVATE\M1KEC\CADO\TEM3 9/Z2/98

CITY_21MC100_002849280

NYC-WTC_000209922