Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS 10/25%01 LAB GROUP #: 5762 Operator Filter Type MCE 25 mm Lab Sample No. 62246 Filter ^ J Client Spl. No. 32 Disk No. Grid I.D. Instrument I.D. EM 10 CRX Comments AreaS2~~ ;GO) Area Screen Magnification 16,400X q 72. Strucc Corspd. to 70 simm 2 o Acc. Voltage 80 kV No. GO to be Analyzed EDS Nor, / Length I.D. of Structure (Nonasb. structure type GO. Structure 3 .5 um Chrys. Amphibole Nonasb. Ambig./ND Elements No. F B C M >. 5um No Coord. < 5um

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I I I 11 W Photo Na. from 1 in 5 asbestos- containing samples) Identify all structures uain 6D5 Grid acceptance: <SD% undissolve Check ecru turosruUOfl for lo 70./aim at(lat. 4) er, overlapped or o e Store all unropeatad

T to S spectra

<13% parUculate coverage >50% coverage StrucL = 0.5um & > 5:1 MPect Ratio overlapped grid squares F pattern) at least 20 unfolded or B C M 5um Nn Not Observed (BUS spectrum or diffraction <5% holes or opaque areas properties conforming ✓ a positive diffraction pattern criteria observed. to laboratory Identification Unused portion et filter Chrysotile Per chry.sUle: 0.73nm alayer / for (pea) Avoided portion the Uaa nectioag repeat. 0.a3am spacing for of filter of (1i0) end (t00) T nacuaa.. portion of inter Portion (zmm aide) Amphibole Ilan r.pest. and appros. Per .mphibole.: 0.5i3am la layer yeryyes ine spot spacing of b .s.ml.eUae 3l.3 line. ayer Ilaeanput distancel Ambiguous ✓= BUS ■ conforming to laboratory tram iteria AMPHIBOLES IdenU IcaUan criteria observed. Amoaite Intersections = 1-3 fibers) 25mm niter Non — asbestos P= Single Fiber (1-3 Crocidolite B= Bundle t >3 fiber. <1 fiber diameter apart) 9~ pPin Anthophyllite C= Cluster (>3 inter. ti acona) g 2uln: W= Metric fl a/C.a. er in W 4 C.O. Tremolite N on _Id e ntified

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