TEM analysis data sheet, sample 59765, September 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5579 - 05/29/01 Ljab Sample No. 59765 Filter Type MCE 25 rnm Operator t- C ''

Client Spl. No. T42 Filter Area 3S5 mm'^2 Instrument I.D. SM 10 CRX Grid I.D. HO. Disk No. Screen Magnification 15,4Q0X (GO) Area 0.01124 Comments. Acc. Voltage 8 0 kV No. GO to be Analyzed __6 ( 4.721 Struct. Cprspd. to 7C s/nim^2.)

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

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' ; - Photo No. (from 1 in 5 aabeatos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra— cotttainiag samples) Grid acceptance:! structures up to 70a/i^in (1st <50% undisBolved filter, overlapped or Folded Struct. = > O.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals U N= Not Observed (EDS spectrum or diffraction pattern) at least SO 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. Inused portion For ehryioUle: Q.73nm spaeins for (020) reflectiona. of niter Chrysotile Q.S3nm spacing for the layer line repeat, streaking -Avoided portion of (HQ) and (130) reflections. of niter For amphiboles: 0.&3nni layer line repeat, and approx. Portion of filter (2mm wide) 3.9 ratio of non-twinned layer line spot spacing to subject to Amphibole layer Une repeat distance (O.SOnm). exARiinaUon

r'n v/= EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES P» Single Fiber (1-3 Intersections a 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) _________________ 25niin filter Crocidolite Non—asbestos C= Cluster (>3 interaecUona) fT ) 7T 7”! M= Matrix I--------- ' Stopping Rules: I--------- - Anthophyllite NSD= No Structures Detected [ >S0 s/C.O. or In 1st 4 G.O. | Tremolite ri Actinolite Non-Identified L;\DATA\PRIVATE\MIKEG\CADDVEka 8/22/99 1. J

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