Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample Nc. 62551 LAP GROUP 4 575? - 1) 24' 0: Filer Type MCE _5 mm Oper>-cr Client Spl No 45 Fiber Area 365mm

Instrument I.D EM 10 CRX Grid :.D. , G Disk No.

Screen Magnification :5,400! (GO) Area 0.01124 me"3 Comments

Ac_. Voltage 80 kV No. GO tJ oe Analyzed 5 4 _ 3truc[. _orsod = .'0 mm

GO. Structure Structuie Type Length I.D. of Structure Nor,/ EDS >0.5 um (Nonasb. il No Coord. No. F B ~C M < 5 um >. Sum IChrys. Amphibole Nonasb. IAmbig./ND Elements 2

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Li r1 I Li

Li ~ I I Photo No. (from 1 in 5 asbestos- Identify all structures uain EDS Check diffraction for asbestos Store all unrepeated spectra-) containing samples) Grid acceptance: structures u to 70a ittm (let 4) Struct_ _ > 0.5um & > 5:1 Aspect Ratio <50% undieaolve i er. a pe or ok a <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) let least 20 unfolded or overlapped grid squares <5% holes or opaque areas Positive diffraction pattern properties conforming to laboratory identification criteria observed. Partioe For ehry.otiiei 0.73nm spacing for (020) relleetlon.. (0:= ./ filter Uiu.ed Chrysotile 0.50nm spacing for the layer line repeat. streaking A.oided portion of (110) and (100) reflection.. of •later Par amphiboles: 0.53nm layer line repeat. and approx. )2mm .Ids) 3.3 ratio of non -twinned layer line spot spacing La Amphibole layer line repeat distance (0.55nm).

I EDS spectrum conforming to laboratory identification criteria observed. F= Single Fiber (1-0 intersections = 1-3 fibers) i AMPHIBOLES Arnosite Ambiguous

Be Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non -asbestos C= Cluster (>3 intersections) M= Matrix Stopping Rule.: Anthophyllite >50 ■/C.O. or in let 4 C.O. Tremalite I NSD= Na Structures Detecmd L•\DATA\PRIYATE\MIIEC\CADOVEM3 0/22/Be Actinolite Non —Identified

NYC-WTC 000104310