Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAP GROUP 4: 57'1 -

Lan Sample No 62580 Filter Type 10E 25 mm Opers=or

Client Spl. No. 16 Filter Area 3d5((mm"2

Instrument I.D. EM 10 CRX Grid 1.D. ~-+ •S \- Disk Nc.

Screen Magnification 16.400X (GO) Area 0 01 24 mm Comments

Ace. Voltage 80 kV No. GO to be Analyzed 6 4.'2: Struc: Corsod. to '0 s

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

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Photo No. (from 1 in 5 asbestos- Identify all structures usin EDS I Check diffraction for asbestos Store all unrepeated spectra J containing samples) Grid acceptance: structures u to 70s inm (lot 4) Struct. = > 0.5um & > 5:1 Aspect Ratio <50% undissolve i er. overlappea or a e I <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas Positive diffraction pattern properties conforming

I to laboratory Identifleatian criteria Unused portion For chryssUlet 0.79nm apaatn` for (020) reflection, of fitter Chrysotile 0.59nm spacing for the layer doe repeat. strealang Avoided parties of (110) and (1:10) reflection. of filter For amphibalm: 0.09nm layer line repeat, and approx. (2mm fide) 34 retie of non-twinned layer line spot spacing to Amphibole layer Ila. repeat dlatanes (0.39nm). EDS spectrum conforming to laboratory Ambiguous identification criteria observed. PHIBOLES I observed.&7ii-Amosite F= Single Fiber (1-3 taterwections = 1-3 fibers) B= Bundle (>3 fibers <1 fiber diameter apart) C- Cluster (>3 inteveatism) 25mm filter Croeidolite I Non —asbestos ~~ SIoPPIng auiea: Anthophyllite Ito NSO= Na Structures Detected >50 5/0.0. or in at 4 0.0. Tremolite Actinolite ~ Yon —Identified I LN DATA\PIUVAMMIKE0\CADD\7EM9 9/22/98

NYC-WTC 000104394