Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAE GROUP 4 5759 - :J _5 3L Lab Sample Nc 52= F:_:e_ Type MCE _= mm oo_erat:.r Client So: Nc 23 Filter Area 395 nm2 Instrument I . 0 EM ` .CR:r Grid I . 0. L:sk Nc . Screen Magni:ication L5 -130'X 'CC I Area O. J 12 mm" Comments Ace. Voltage 80 kV No. GO to be Analyzed 4.7"'' Strcc: oropd .., ' -n mm

GO. Structure Structure Type Length LD. of Structure N or/ EDS No Coord. No. 3U.5 um (N ernent , 5um F B C M < 5um Chr ys. Amphibole p Nonasb. Ambi g./ND Elements

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- Photo No. ((rom 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unreneated eoectra~ containing samples) IGrid acceptance:I structures up to 705 thm (let 4) Struct. _ > 0.5um & > 5:1 Aspect Ratio <S0% undiseolved 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 Totals <5% holes or opaque areas ✓n Positive diffraction pattern properties conforming to laboratory Identification criteria observed. Unused portion Par ehrysetiir. 0.73nm opacing for (020) resection.. of niter Chrysotile 0A7nm spacing for the layer Une repeat. streaking Aroidad portion of (110) and (190) reflections. of flitar For amphiboles: 0.33am layer line repeat. and approa. Porubs of niter (2mm wide 3.3 ratio of non-twinned layer line spat spacing to aubiect to esammauoa ) Amphibole layer line repeat distance (0.39nm). ✓= EDS spectrum conforming to laboratory o Ambiguous identification criteria observed. AMPHIBOLES to F= Single Fiber (1-3 Intersections = 1-3 fibers) Amoelte 8= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter I Crocidolite Non—asbestosr

r C= Cluster >3 intersections) ^_f M= Matrix StoPP in[ Rule.. I Anthophyllite I NSD= No Structural Detected >30 ./c.0. or in let c4C.D. ~ Tremahie la\DATA\PRIYATE\MlXEC\CADD\TEM2 0/22/08 Actin olite Non-Identified

NYC-WTC 000104290