Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

- TEM ANALYSIS ATC ASSOCIATES INC. LAB GROUP # 5762 - 10/25/01 Operator __4jf__ Filter Type MCE~5 mm Lab Sample No. 62262 Filter Area 3g J Disk No. p l yJ~ Client Spl. No. 48 Grid I.D. Comments Instrument I.D. EM ~—1 (GO) Area 0.0 _ _ 1= h °m Cors d to 70 s/mm 2. ( 4 721 Struc Screen Magnification 16 400X 6 No. GO to be Analyzed EDS Acc. Voltage 80 kV I.D. of Structure Nor ✓ (Nonasb. Length ND Elements Structure Structure Type Amphibole Nonasb. Ambig./ND GO. um ) p,5 gum Chry s. Coord. No. F B C M < 5 um

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1 I I uain EDS Check alltraa.+..~ (1st 4) aaiustos- Identity all atrttcturas structures u to 7Oa Tftn1 Q y ,d 1 s In S acceptance: orfolde 1. 1 Photo No. from l Grid < uadtsaolve r. over apps containing sample') coverage >60% covgriid{esquares Mpect Ratio <IO% particulate F, C > 5um Struat. = 0.5um & > 5:t le t 20 unfolded or overlapped L B M diffraction pattern) at60%an tie areas sPeetrttm or il l hole' or o a Na hot observed (EDS properties conforming Unused Poruoo Chrysotile Positive diffraction pattern criteria observed. of filter identification

I to laboratory ■paataifor reflections. Molded porgy Q.77em (~i etraakiet Per am p Wer for the layer Ins repo L of (liter Amphibole of i Portion of filter (2mm vlde) of (11'' (1312) eofleoulae and °~ (1112) en Una repeat. and Ipproa• subloot to 0.53Dm lapel •Uon of li For amPbtbeln: spot apaein(b 3.S nano of n ._ lanael(0.»m). Ambiguous Ilea repeal

I laboratory \ H1BO S \ EDS conforming to SOS apsetrum Arn0slLe Non —asbestos observed. identification criteria 1-3 fibers) 25mm filter rocidolite Fv Single Fiber (1-7 <lt(ibe~dlaraneter -Part) thophyllite B= Bundle S>7 fitren fi <1 fi 9t oping Rule.: `

NYC-WTC 000104137