NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS 'LP Lac Sample Nc Fl L ni'n

22-t;.c2 Spl . No. mm 2

Inscrumen: -- Grid ;.D. •' f C Yo Screen Macnificacior. 40;: Ar53 mm Ccmmer-Y = ACC. VciCage 8C kV Nc rsod 5 ■ cr-

I EDS GO. Structure SLruclure Type j Length I.D. af Structure N or - (.Nonasb. NoJ Coord. No. Sum iChrys.i Amphibole ! Nonasb. !Ambig./ND Elements)!

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( ! ! _______________ !____ Photo No. (from I in 5 asbestos- Identify ail aLructurea using £DS Check diffraction for asbestos _____ JStore i_____ J all unrepeated spectra '^ — containinc samples) Grid acceptance: I structures up to 7Qa/!?im (1st 4) Struct. = > O.Sum k > 5:1 Aspect Ratio <50% undiaaolvea filter, overlapped or foldeu <IOX particulate coverage >5QX coverage Na Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > 5um to laboratory Idantiflcatlan criteria observed. 'Unuaad portion For chryaotile; 0.73nm spacing for (020) reflscUont, of filter a.oanm spacing for the layer Tine repeat, streaming Chrysotile of (110) and (130) reHeeUans. 'Avoided portion Of niter For amphiboles: 0.33nm layer Une repeat, and approx. // / portion of filter \ U (2mm wide) 3.3 ratio of non-twinned layer Une spot spacing ui U \ ; subject to examination ; J :| Amphibole layer Uns repeat distance (O.SOnm).

iZs EDS spectrum conforming to laboratory Ambiguous I identificatlan criteria observed. AMPHIBOLES 1 L F= Single Fiber (1-3 Interaectiona = 1-3 fibers) Amosite ' B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersectjonsJ ______________ aSmm filter Crocidoiile ; Non- asbestos t M= Matrix J Stopping Sules: I ■ Anthophyllite ' L NSO- No Structures Detected >30 i/G.O. or in lat a G.O. Tremolite ; . Actinolite Non-ldentified j L\DaTA\PRIVATE\MIKEC\CAD0^TEM3 9/22/98

CITY_21MC100_002849283

NYC-WTC_000209925