Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I. ASSOCIATES INC. - TEM ANALYSIS ATC LAB GROUP - 55762 operator Filter TypeMCE =5 Lab Sample No 62259 Filter Area 385 m Disk No. 2 Client Spl. No. 45 Grid I.D. comments Instrument I.D. EM 10 CRX s/mm~2 (GO) Area 0.~ 1 _- orspd. to 70 4.721 Struct. Screen Magnification 16 4o0X c No GO to be Analyzed voltage 90 kv EDS Acc. I.D. of Structure N er ✓ (Nonasb. Length GO. Structure Structure Tree ./ND Elements >~ •5um g 5um Chr s. Amphibole p Nonasb. Ambig No Cooed. No. F B C M < 5um

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EDS cneca pa.... (ls t 4) Usln ( asbaster ldentlf r all structures structures a to e$tm O y S `Photo No. from 1 la S Gr id acceptance: undissolve r, over appe or o 1 containing samples) <50% coverage >50% coverage pect Ratio <10% particulate squares M Struct. o 0.5um & > 5:1 As F B C diffraction pattern) at least 20 unfoldedopaque or overlapped grid areas <5% holes or No Not observed (CDs spectrum or properties conforming portion Chrysotile di!lneuon pattern observed. Unu~ of titter identification criteria La laboratory for (010) reflection. aroldad porUop Per am sprain 0for lb a al tins repast. streaking 1a7sr f idler 0.07am apwelot for tLaeetioea. of niter (tmm wide) Amphibole (lid) and (130) rsfl portion of Positive and ato sublacI b 0.09am lar.g tins repast. For ampWbelss: o[pep-limn. l( ar ilea spot spacing sumtaaUos lay nun layer lies repeat diem g a ). i ( y to Ambiguous conforming to laboratory AMPHIBOLES SOS spectrum observed. ident baton criteria Am091te a 1-3 fibers) Non—asbestos 25mm filter pa 9ingle Fiber (1- 3 lnterseoUons diameter apart) Anthophyllite 8= Bundle (>7 intefi bers <1 fiber (= rsections) 9lopping Ruln: _ld P ntified rc Closter r>7 Tremoliie u

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