Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample No.

Cllert Sp1 72524

No. 18 LAB GROUP 5';a

Fziter Tyne MCE 25 mm

-ter Area 285 mm' F:' - '_ 7'25'01

Oper3tOr

Li Instrument I.L. EM .

Screen Magnification 1€.400:

Acc Voltage 80 kV 1 Cc:: Gr_.i 2.2

.GO! Area

Mc, GO 0.011241 mm - -

be Analyzed Disk. No.

Comments

4.°21 Struct. Oorsnd. to 77 s;:nm"2

I GO. Na Caord. Structure Structure Type No. F B C M ,o.s um < 5 um Length >. 5um Chrys.l I.D. of Structure Amphibole EDS N or/ (Nonasb. Nonasb. Ambig./ND Elements)

Isc

I I I I I I I I I I Photo No. (from 1 in 5 aabeatas- containing samples) Struct. _ 0.5um & > 5:1 Aspect Ratio iden UYy all atruciurea uain EDS Grid acceptance: <50% undiaeolve 1 er, Check diffraction For asbestos structures u to 70a ltim (let 4) over appe or o e <10% particulate coverage >50% coverage N- Not observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Store all unrepeated spectra)

Totals <5% holes or o a ue areas Positive diffraction pattern properties conforming

I ✓ to laboratory identification criteria observed. Unused poruon For ebrywtits: 0.73nm ■pacing for (020) reflections. of (liter Chrysotile 0.39am spacing for the layer line repeal, aVeaking Avoided portion of (110) and (130) raflccuona. of (liter For ampblbale■: 0.33nm layer line repeat. and ■ppros. Portion or filter (2mm vtdo) 3.3 ratio of non-banned layer line spot spacing to subject to .:.-,nation Amphibole layer line repeat distaste (0.33nm). EDS spectrum conforming to laboratory ldenLLylceUon criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 lnter■eetlona = 1-3 fibers) I Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 23mm niter Crocidolite Non-asbestos r_.___; OiaPPIng ewer. ' Ca (>3 inteoecUons) M= Matri:r Anthophylllte NSD= No Structures Detected >80 ./C.O. Cr m lat 4 C.Q. Tremotite Actinolite Non-Identified u\DATA\ PRIVATE\MIXEG\CADD\TEM3 9/22/98

NYC-WTC 000104285