NYC-WTC_000209771

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS GROUP # 5670 - 10/12/01

Lab Sample No 60955 Filter Type MCE 25 mm Operator Client Spl No L-5 Filter Area 3 85 mm'^2 Instrument I D EM 10 CRX Grid I D Disk No Screen Magnification 16,400X (GO) Area 0 01124 mn~2 Comments Acc Volcage 80 kV No GO to be Analyzed _4 ( 3 147 Struct Corspd to 70 s/mm'^2 1

GO. Structure Structure Tjp« Length I.D. of Structure EDS >0.5 um (Nonasb. No Coord. No. F B C M < S um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) / -2 3 ---

Store alt unrepeated spectra—^ Photo No. (from 1 in 3 aabeaUs- Identify all atructurea using BPS Check diffraction for aabeatoa containing samples) Grid acceptance;j_ structures up to T^a/^m (1st 4) Struct = > O.Sum Ie > 5:1 Aspect Ratto <50% undlsaolved filter, overlapped or folded <10X particulate coverage >50X coveran Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties eonformiaf <SX h^es or opaque areas F B C M >■ Sum to laboratory identification criteria obaerved. Jnuoo4 portioa Por chrysoUlvi O.TSnm asaeinc for (OSO) ronoeUoaa, •f rut»r Chrysotile O.Mnm epeoloc for the kyerline repeaU streaking 'Avoided porlloo of (110) and (130) renectlons. of niUr For ampbiboles: O.S3nm layer Hm repeat, and approa. P«rUM of niUr (Smm «ido) 3.5 rsUe of boo-twinned lever line spot apaeing U o±S2i& Amphibole layer line repeat distance (0.&anni). x/. KDS iDwtrum conrormlllf U hbonUry Ambiguous idantlnGaUon ertteria obaarrad. AMPHIBOLES F« Single Fiber (l~3 intersections * 1-3 fibers) Amosite B« Bundle (>3 fibers <1 fiber dtametar opart) amn niter Crocidolite Non-asbestos Co CluaUr(>3 latarseeUoaa) Jsfc 2ulns I--------1 Ha Hatrix Anthophyllite NSDa No Structuroa OotoctoO [ >90 l/G.0. or ia IM * G.O. Tremolite Actinolite Non-ldentified k\MTA\PBI¥ATI\IIIKtC\CJlDD\TlN3 9/22/08

CITY_21MC100_002842237

NYC-WTC_000209774