Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5609 - 10/05/01 Lab Sample No. £0040 Filter Type MCE 25 mm Operator Client Spl. No. SHS-I>10-10/5-33 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D, Disk No. Screen Magnification i6,400X (GO) Area 0.01124 mm'^2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 4 ( 3.147 Struct:. Corspd. to 7Q s/tnm^2.)

GO. Structure Stnicture 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) < 6 um

2X2 // // // IS

Photo No. (from 1 in 5 asbestos" Identify all structures uaing EDS Check diffraction for asbestos store all unrepeated spectra containing samples) iGrid "acceptance: j structures up to 70s/Ani (l»l 4) <50% undlssolvea filter, overlapped or rbldeo Struct. = > O.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea y/s Positive diffraction pattern properties conforming <5% holea or opaque area a F B C M > Sum to laboratory idenlifleaUon criteria observed. JnuMd portion For chrysotile: 0.73nm ■paeina for (020) ronections, cf flltar Chrysotile 0.33nm spacing for Uie layer line rapoat, streaking ■Avoided portion of (110) and (lao) rafleotioQs. or niur For amphiboles: OJUSom layer Une repeat, and approx. Portion of filter (Hmm wide) 3.S ratio of non-twinned layer line spot spacing to tubject to asaminaUon Amphibole layer line rapeet distance (0.3anm). EDS-spectrum conforming U laboratory Ambiguous Identification criteria observed. AMPHIBOLES F= ain<la Fiber (1-3 IntenecUoM = 1-3 liber.) Amosite 0= Bundle (>3 fibera <1 fiber diameter apart) C= Cluster (>3 intersections) 2amm nilsr Crocidolite Non—asbestos J stopping Rules: Anthophyllite Us Matrix NSQs No Structures Detected >30 t/G.O. or in 4 G.O. Tremolite Non-!denlified fl/22/9a~ Actinolite U\0ATA\PWVAT8\MIl«C\CADlWUa

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