NYC-WTC_000232451

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5515 - 09/17/01 Filter Type MCE 2S mm /^ Lab Sample No. 59047 Operator Client 3pl. No. 03 6 Filter Area 335 mm'^2 Inscrufnent I.D.. EM 10 CRX Grid I.D. Disk No.

I Screen Magnification 16,400X Aco. Voltage 80 kV (GO) Area 0.01124 mm^2 No. GO to be Anal/zed _0 Comments ( O.OOQ Struct. Corspd. to 70 a/mm*2.)

EDS I GO. No Coord. structure Structure Type No, F B C M >0.5 um < 5 um Length 5um Chrya I.D. of Structure Amphibole N or (Nonasb. Nonasb. Amhig./ND Elements) X/ 2. <7 //

_53 // //

I 22- a Kt a /o 7

I

I I Photo No. (from 1 in 3 aabeatoa- Identify all atructurea using BPS Check diffraction for aabesLoa Store all unrepealed spectra

I containing aamplea) Struct. - > O.Sum Ie > 3:1 Aspect Ratio Gridacceptance?! atructurea up to TOa/i^im (lat 4) <50% undiaaolvetf filter, overlapped or folded <l0X particulate coverage >5Q% coverage N= Not Observed (EDS apectrum or dlffrsellon .pattern) at least 20 unfolded or overlapped grid squarea PoslUvo diffraction pattam propertiea conformlnf <5% holes or opaque areaa F B Totals C M > Sum to laboratory Identiflcalion criteria obaerved. •tlnuasd pardon

I For chryaoUIo: 0.73nm apeclng for (020) renecUons, O.oanm apacln* for me layer line repeat. «ireaain< of (110) and (120) reflecUons. For amphiboles: ajantn layer line repeat, and appma. 3.3 ratio of nan-lvlnned layer Une apol ipaclng to layer Une repeat distance (0.33nm). Portion of niLer tubject la «x*mln*Uon of tilUr 'Avoided portion of niter (2mm vide| Chrysotile

Amphibole Jis

EOS ipectrum conforminc to laboralory identification criteria observed. AMPHIBOLES Ambiguous Sincte Flhor (1-3 InleraecUona = 1-3 flbcra) Amoaile. a- Bundle (>3 flbarv <1 fiber diameter ipart) C= Cluiter (>3 interaecUona) 29mm filtar J Slapping Ruies: Crocidolite Non-asbestos Matrix Anthophyllite NSOa No Structurea DeUcLad [ >30 i/G.O. or In lat. 4 G-O. Tremolite Actinolite Non-Idenlified U\0ATA\PRlVAT5^MIKSC\CADD^TEM3 9/22/90

CITY_21MC100_010237409

NYC-WTC_000232451