Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

INC. - TEM ANALYSIS ATC ASSOCIATES P~ 5761 - 10/25/01 LAB GROUP # Operator Filter Type MCE 25 mm 62186 Lab Sample No. Filter Area Disk No. Client Spl. No. 13 Grid I . D . •r ~ 2 Comments CRX 1 Instrument I.D. EM 10 (GO) Area 0.011 COr9Pd co 70 s/mm~2. ( q 721 Struct Magnification 16 40X Analyzed 6 Screen No. GO to be EDS 80 kV Nor ✓ Acc. Voltage I.D. of Structure (Nonasb. Structure Length ND Elements G0. Structure type Amphibole Nonasb. Ambig. / um Sum Chr s. .._ ._.l No. F H C M

D l usin ED9 (tat 4) Identify all atruclures No. (from 1 to S asbeeto.- Photo contai n i n g samples) Grid acccPt+ncel ota e50% undaaa ' ooverage >fi0x coverageid squares & > 5:1 Aspect Ratio <10% particulateuntoldad or overlapped gr St.rucL = 0.5um attero) at least 20 us areas <5% boles or a a NO Net observed (gam spectrumpropertte■ or diffraction P conforming Uou.ed PsroOe ChrysOtile diffraction palias of railer V ' t o late Cory Idanti[leaLLen ,rtt*ria op.arved. laboratory to ohry.O o roided portion for 0.73em sPa.Ynt ne raw (tea a . U aklo{ 0.r ehra.ocls: Lb. toyer t. of mur Amphibole 0.5(am apaclag for reflections. ti ter or ni side) Am of (Il0) and (150) snd approi. Poriuoblsof o.SSnm toyP~eeer tine sp t s clef to ssamlaatime For aU hit., . toe spot 5.5 retie of nos`Ud lannl(0• Ambiguous EDO saye line repeat AMPHIBOLES gDs apeatrum conforming to labonlory criteria observed- Amoette Non—asbestof V id.ntlttoatien intersections 3 1-3 fibers) 25mm filter Crocidolite 5 To Single Ptbar (l_ <1 fiber diameter apart) Anthophyllite gtaPPlag Rules: ^^ B. Bundle 1' S fibers 7 7 I ntersections) Tremolite I rvnr _identified NYC-WTC 000104197