NYC-WTC_000232455

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5515 - 09/17/01

I Lab Sample No. Client Spl. NO. 025 59054

Instrumenc X.D. EM 10 CROC Filter Type MCE 25 mm Filter Area 335 mm"2 Grid I-D. Operator

Disk No.

I Screen Magnification 16 , «^00X Acc. Voltage 8 0 kV (GO) Area 0 .01124 mm"2 No. GO to be Analyzed 21 Comments. (15.533 Strucr.. Corspd. to 70 s/rnm"2.)

GO. Structure Structure Type Length l.D. of Structure EDS

I No Coord. No. F B C M >0.5 um < 5 um Sum Chrys Amphibole (Nonasb. Nonasb. Ambig./ND Elements)

I I X

I

I I I I I I I Photo No. (from 1 in 5 as tea Los- Identify all aUuctures using EDS Check diffraction for aabeatoa Stare all unrepeated spectra—^

containing samples) Grid acceptance;) structures up to 70b/Aim (lat 4)

I struct. 3 > O.Sum Je > 5:1 Aspect Ratio <a0X undiaaolved filter, overlapped or folded <10X particulate coverage >50X coverage Ns Not Observed (SOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea 5/^ Positive diffraction pattern properties conforming Uj laboratory Identification criteria observed. <5X holes or opaque areas F B Totals C M > Sum 'Unused portion Por ehryaoUla: 0.73nm spacing for (020) raflecUons. of niter 0.33nm spacing Tor the layer line repeat, streaking -Avoided portion Chrysotile of (110) end (130) rerieaUons. of niter Par amphiboles: 0.53nra layer line repeat, and approi.// Portion of niter (2mm vldo) 3.3 ratio of non-t«tnned layer line spot spacing bo II ■ub|ect tn oxaminaUon Amphibole layer Une repeat diatance (O.SSnm). U = ESS spectrum conforming to laboratory \ IdenUftcatlon criteria observed. AMPHIBOLES Ambiguous P- single Fiber (1-3 InteraecUona = 1-3 fibers) Amosite a= Bundle f>3 fibers <1 fiber dlameUr apart) 25mm niter Crocidolite Non-asbestos C= Cluatar (>3 IntersecUona) J stopping Rules: Us Matrix Anthophyllite NSD= No Structurea DeLeclod [ . >50 i/C.O. ar in lai 4 G.O. Tremolite

I L\ DATA\ PHI VATE\ MIKKG\ GADDSTZWa 9/22/oa Actinolite Non-Identified

CITY_21MC100_0 10237416

NYC-WTC_000232455