Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP It' 5769 -

Lab Sample No, 52540 Fi.:_- Type MCc 25 mm Operator .

Client Sol No. 34 Filter Area 3?5 mm' Instrument I.0 EM 10 CE% Grid I ( ( ~\ L Disk No. Screen Magnification 16,400+ (GO) Area C'134 mm Comments Acc. Voltage 80 kV No. GC to be .Ana ced 4 - 1 St:"l.t. _crsod - = mm _

GO. Structure structure Type Length I.D. of Structure EDS N or/ >0.5 um (Nonasb. No Coord. No. F H C M >. 5um Chrys. Amphibole Nonasb. Ambig./ND Elements 5 ufn

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i- Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) 1 acceptance:1 structures up to 70e f'fim (lot 4) I Struct = > O.5um & > 5:1 Aspect Ratio <50 undt ca lve i er, averappe r o e <lO% particulate coverage >50% coverage Totals Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares notesoropaqueareas Positive diffraction pattern properties eonformmg ico to laboratory identification criteria observed. Unused portion For chrysetile: 0.73nm spacing for (020) resections, of filter Chrysotil e 0.33nm spacing for the layer line repeal, streaking Avoided of (110) and (130) reflections. of filter portion Par amphiboles: 0.53nm layer line repeat. and appms. Portion of 0ltar (2mm side) 3.5 ratio of non-twinned layer line spot spacing io subject to asamination Amphibole layer line repeat distance (0.53nm1. EDS spectrum conforming to laboratory Identification criteria observed. AMPHIBO LES Ambiguous F= Single Fiber (1-3 Intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm filler Crocidolite , Non —asbestos Cluster>3 intersections) Imo =Stepping RuIes: i1= Anthophyllite NSD= No Structures Detected >A0 ■/C.O. er In lri t G.O. Trernolite Non —identified Actinolite t•\DATA\PRIVATE\YIKEG\CADDVEu3 9/22/98

NYC-WTC 000104301