Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAS GROUP 0. 5'7 - 1126,'G-

Lab Sample No. 52581 Filter Tyne NCR , 5 mm Operator .2 Client Sp1. No 17 Filter Area 305 mm

Instrument 1.D. EM 10 CR! Grid I.D. Disk No.

Screen Magnification 16.4DDX (GO! Area : 3:124 mm Comments I Acc. Voltage Bo kv No. GO to cc Analysed _ 4.721 Struct Irrsoo -0 S mm

GO. Structure Structure Type Length I.D. of Structure N or,/EDS I >05 um (Nonasb. No Coord. No. F B C M 5um IChrys. Amphibole Nonasb. IAmbig./ND Elements) 5

LI

LI

n ) L Photo No. from 1 in 5 asbestos- containing samples) Struct. _ > 0.5um & > 5:1 Aspect Ratio Identify all structures usin EDS IGrid acceptance:I Check diffraction for asbestos structures up to 70a f;tm (lot 4) <50x undi..alved filter. overlapped or folded <10% particulate coverage >50% coverage N. Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares Jo Positive diffraction pattern Qerea conforming to laboratory identification criteria observed.QUOUdse holes or opaque areas I

F Store all unrepeated spectra

B Totals C ( . 5um portion For ehrys.Uln: 0.I nm ai' inti far 1020) refseuciu, of filter Chrysotile 0.03am spaatna for ute lager line repeat. atraaiuoi I of (110) and (130) reflections. Avoidte portion a( filter For amphiboles: 0.39nm layer line repeat. and approa. (2mm ti dal 3.3 ratio of non-twinned layer line spot spacng to Amphibole layer Ilea repeat dialanee (0.50nm)• ~/o EDS spectm confo ing W laboratory Ambiguous identification criteria observed. PHIBOLES F= Single Fiber (1-3 Intereect/ona = 1-3 fibers) Amosite Be Bundle (>9 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non — asbestos~I Co Matrix Cluster (>3 intersecons) ti ~~Stopping Rules: M= Anthophyllite ',, NSD= No Structures Detected >50 ./C.O. or to lot ♦ 0.0. Tremolite Non —Identified Actlno life L\DATA\PR[YATE\MIKEC\CAD0.3SM3 9/:2/98

NYC-WTC 000104395