NYC-WTC_000188660

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 1C'/17/O1 Lab Sample No. SI Filter -MCE 25. mm Operator A? A Client SpL. No, NSHS-EIR-10/1^ Filter Area 385 mm^2 Instrument I.D. EM 10 CFX Grid I.D. Disk No Screen Magnification 16,4 00/. (GO) Area 0. Uli24 mm Comments Ace, Voltags 80 kV No. 3C to be Analyzed 4 1 3.147 Struct.,Curspd. to 70 s/mm^2.)

GO. Structure structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No Coord. No. F B C M Sum Chrys, Amphibole Nonasb. Ambig./ND Elements) < 5 um

—Photo No. (from 1 in 5 asbestoa— Identify all alructurea uaing SOS Check diffraction for asbesLoa Store all unrepeated spectra — containing samples) Grid acceptance: I ______ structures up to TOa/Am (let 4) <S0X undisaolvea niter. overlapped or foicied Struct. = > O.Sum de > 5:1 Aspect Ratio <IOX particulate coverage >50X coverage N= Not Observed (EDS spectrum or diffraction pattern) al least 20 unfolded or overlapped grid squares Totals <SX holes or opaque areas F B C M > Sum ^3 Positive diffraction pattern properties conforming to laboratory identification criteria observed. -Unused perLion Por chrysoUls: 0.73nin apaclns for (020) rsnsctiDna, of filler Chrysotile a.53nm spacing for the layer line repeat, streaking -Avoided portion of (110) and (130} reflecUons, of niter Por amphiboles: O.OOnm layer line repeal, and approx. (2mm wide) 3.9 ratio of non-tvinned layer iina spot spaelng lo aubieet to I I oxaminaUen / Amphibole layer line repast distance (O.SSnm). v/s EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES Ps Single Fiber (1-3 intersections s 1-9 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= ClueLer (>3 Intersections) ZfimiQ nitar Crocidolite Non—asbestos Us Matrix I--------- 1 stopping Rules: Anthophyllite NSD= No Struetum Detoctod >90 i/G.O. or in 1st 4 G.Q. Tremolite Actinolite Non—Identified U\DATA\PRtVATE\UIKEC\CADDXrEUa fl/az/Ofl

CITY_21MC100_003082298

NYC-WTC_000188660