Asbestos TEM analysis results, Sep 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS GROUP #: 5537 - 09/2Q/Q1 Lab Sample No. 59307 Filter Type MCE 25 mm Operator Client Sol. No. 03 Filter Area 385 Instrument I.D. EM L0 CRX Grid I.D. Disk Mo. Screen Magnification 16,400X ■GO) Area 0 . Q1124 r.n"2 Comments Acc. Voltage 8 0 kV No. GO to be Analyzed 4 ( 3.147 Struct:. Corspd. cc 70 s/mm^2.)

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

2= // 3. 1.1 d

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Photo No. (from I in 5 asbeatca- Identify all atructurea uaing EDS Check diffraction for aabestoa Store all unrepeated apectra— containing samples) Grid acceptance:! structures up to TOs/Am (l«l 4) <30% undiaaoivea filter, overlapped or folded Struct. 3 > O.Sum Se > S:1 Aspect Ratio <10X particulate coverage >30% coverage Totals lj Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. •Unused portion Far ehryaotile: 3.73nm ipaeinc for (020) reflectioni. of fnur Chrysotile a.53nm spacing for the layer line repeat, streaking -Avoided portion of (iiO) and (130) reflecUona. of niter Par amphiboles: O.bOnm layer line repeat, and approx. {2mm vide) 2.5 ratio of non-t«inned layer line spot spacing to Amphibole layer line repeat diatance (O.S3nm).

r"T y/= EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite B=! Bundle (>3 flben <1 fiber diameter apart) SSmm filter Crocidolite Non—asbestos 0= Cluster (>3 intersections) J Stopping Rules: L Anthophyllite Ms Matrix NS0= No Structures Detected [>50 i/C.O. OP in lot 4 C.O. Tremolite Actinolite Non-Identified L;\OATA\PRIVATZ\ MIKSC\ CADQV^Ma a/22/98

NYC-WTC_000174894