Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAS GECUP 4: ; 7oi ,'=5~')1 Lab Sample No 03517 F_1.1 r Tppe MCE "= mm Operator Client Spl. No. 06 F:.lter Area 39S mm'2 I-/ Instrument I.C. EM 10 CP_< Grid I.D. ~~ Disk No. Screen Magnification 16.400% !GO) Area J. :L4 mn'7 Comments Arc. Voltage 80 kV No. GO to be Anal iced 6 4.721 Struct. Corspd. to 70 s/mm":.

GO. Structure Structure Type Length I.D. of Structure EDS N Dry ' ''0'S um (Nonasb. No Coord. No. F H C M 3 5um Chr ys. 5um Amphibole p Nonasb. Ambig./ND Elements)

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Photo No. (from I in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Stare all unrepeated spectra J containing samples) IGrid acceptance: structures up to 70a i[im (let 4) <50% undiesoived filter, overlapped or o e I Struct. _ ) 0.5um b > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) 1st least 20 unfolded or overlapped grid squares <5% holes or opaque areas Paattive diffraction pattern properties conforming Lo laboratory identification criteria observed. Unused portion For chry.oWai 0.73nm spacing for (020) roftaotiona. at filter OAOnm spacing far the layer Ilan repeal, s aki Chrysotile I of (110) and (130) refeetiens. Avoided of !liter portion For ■mphtboles: 0.03nm layer line repeal, and apPron.E of filter c (2mm ►fde) 1.3 ratio of non -twinned layer Ilse spot spacing to t to Amphibole layer line repaat distance (0.32m). ination

✓' EDs spectrum conforming to laboratory gb Ambiguous Identification criteria observed. AMPHIBOLES I P= Single Fiber (1-3 intersections = 1-3 fibers) Amosile Be Bundle (>2 fibers t1 fiber diameter apart) 20mm cuter Crocidolite Non -asbestos) C Cluster (>2 Intersections) M= Ile ti-is 2Loppiag Rules: i Anthophyllite - _J NSD= Ni, strucWre■ Detected ~ >so s/C.0. fir in tai. 4 c.o. I Tremolite ~ Actinolite Non —Identified I L\BATA\PRIVATE\xIKEC\CADO\TEtl2 9/22/96 -

NYC-WTC 000104273