TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5741 - 10/23/01 Lab Sample No. 62002 Filter Type MCE 25 mm Operator Client Spl. No, 43^8 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. TLZl Disk No. Screen Magnification 16,4QQX (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corapd. to 70 3/mm"2.)

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

7? '___ 0 1? pg if DF

Lu Photo No. (from 1 in 5 aabestoa- Identify all atructurea uaing EOS ChecL.c ___________ dinraction for __________ asbestos store all unrepeated spectra containing samples) fCri^^cceptancen atructurea up to VOa/Am (l»t 4) <50% undiaaolven hlter, overlapped or folded Struct = > Q.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. inuaed portion For chrysotile: 0.73nm spacing for (020) reftsctions. O.S3nm spacing for the layer line repeat, streaking of filter Chrysotile of (110) and (ISO) refleeUons. ‘Avoided portion of filter For amphiboles: 0.93nm layer line repeat, and approx. Portion of filler (2mm vide) 3.S ratio of non-tvinned layer tine spot spacing to lubject to examine lion Amphibole layer tine repeat diatance (0.93nm). EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite 8= Bundle j>3 fibers <1 fiber diameter apart) ZSmm filter Crocidolite Non-asbestos S: ,--------- 1 suppin. Rule.: I--------- Anthophyllite NSD= No Structures Detected | >SQ «/C.Q. or In tat 4 G.O. | Tremolite Actinolite Non-Identified L:\DATA\PRIVATB\M1KBC\ CADD'^EHa 0/22/90

NYC-WTC_000174911