NYC-WTC_000188616

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GROUP #; C?

Lab Sample No E9290 Fiizer Type MCE 25 mm Ooeracor Client Spl. No. NSHS-1IMS-3/1--Q4 Area 395 mm"2 _ __ ,—- Instrument: I.D. EM 10 OILX Grid I.D. liibl/AA Disk Nc Screen Magnlficatian 16.400Z (GO- Area mm Oommencs Acc. Volcage 5 0 kV No. GO Co be Analyzed 4" -Scruct. Corgod 70 S/'nim*'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

■a.

A

Photo No. (from 1 in 5 aibestoa- Identify all structurea using EPS Check diffraction for aabeatoa Store ail unrepeated spectra containing samples) Grid accegtancgd structures UQ to 70a/:?im (Ut 4) <50% undisaoivea filter, overlapped or folded Struct = > Q.Sum Je > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Ns Not Observed (EDS tpeetrum or diffraction pattern) at least 20 un/olded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas .. F B C M > Sum to laboratory .dentification criteria observed. •U&usad portion For chrysotile; 0.73nm apaelng for (020) raflectlons. or niur Chrysotile apaolng for the layer line repeat, atreaaiag ‘Avoided portion of (110) and (100) renectlona. of niter For amphiboles: Q.d0nm layer line repeat, and approx. ; Portion of filter {2mm vtde) 3.3 ratio of non-tvinned layer line apot spaeinf to I subject to axamtnaLion Amphibole layer line repeat distance (O.SSnmJ.

SDS ipectrum conforminc to laboratory idanUncation criteria abaerved. AMPHIBOLES Ambiguous Fa Single Fiber (1-3 intcrsccUona a 1-3 fibers) Amosite Ba Bundla {>□ fibers <1 fiber diameter apart) Cluster (>3 Intersections) 25mm fllLor Crocidolite Non-asbestos J SLoppin< Rules; Us Uatrlx Anthophyllite NSD= No Structures Detactad I >50 i/C.O. '• I 1st 4 C.O. Tremolite Actinolite Non-Identified L!\ DATA\ privates M1KEC\ CADO'TSaS 8/22/98

CITY_21MC100_003081947

NYC-WTC_000188616