NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROU? 4 ''26^ 01 Lab Sample Me ■e mrr, Cp-ir £p_. Mo Belzer .Ares 3SS mm'

Instramenc . gy 10 LPK D. 9'V Disk Me Screen Madnifxcation 15. 400?: (GO: Area mm C3rT.inerxs .Ac3. Voltage SO kV Nc. GC cc be AnaL'/zeb 4 ■’2 - 0 S’ mm

GO. Structure SU-uctur. Type Length I.D. of Structure EDS >0.5 um I (Nonasb. i No Coord. No. F B c Im Sum Chrys.l Amphibole Nonasb. iAmbig./NDl Elements)! < 5 um t

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Photo No. (from I in 5 asbestos- I i }______ Identify all structures using EDS Check diffraction for asbestos Store ail unrepeated spectra containing samples) Grid acceptance:! structures up to 70s/z^m (1st 4) <S0X undiaaolvea filter, overlapped or folded Struct. = > O.Sum k > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (CDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern propertisi conforming <5% holes or opaque areas --------- F B C M > Sum to laboratory identification criteria observed. •Unused portion For ehrysoUle: 0.73nm apaeing for (020) renecUona. of niter Chrysotile ( Q.SSnm spacing for the layer Une repeat, itreaking 'Avoided portion of (110) and (130) reflections. of niter For ampliibolas: 3.33nm layer Une repeat, and approx. 3.5 ratio of non-twinned layer tine spot spacing to (2mm wide) Amphibole j layer line repeat distance |Q.53nm). vX5 EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibersl .Amosite B= Bundle (>3 fibers <l fiber diameter apart) C- CJusUr (>3 intersections I ____________ 2Smm filler ■ _________ Crocidolite Non-asbestos i M= Matrix i--------- Slopping itules: ,----------- .Anthophyllite i r NSD= No Structures Detected \ Ict^oUie ! Non-ldentified | L:\DATA\PRIVATE\1(IKEC\CADD\7EM2 9/22/98

CITY_21MC100_002849277

NYC-WTC_000209919