Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS I LAB GROUP # 5762 - 10/25%01 I-- Operator Filter Type MCE 25 mm Lab Sample No. 62228 Filter Area 3 5 mm I Client Spl. No. 14 Disk No. I.D.

u Instrument I.D. EM 10 CRX Comments (GO) Area 0.01 24 mm"2 _ Screen Magnification 16 400X to 70 s/mm 4.721 Sr_rucc. Cars d 6 No. GO to be Analyzed Acc. Voltage 80 kV EDS Length I.D. of Structure N or / (Nonasb. structure Type GO. Structure Nonasb. Ambig./ND Elements um 5um Chrys. Amphibole No Coord. No. F SCM I

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1 r HH\ Identify all structures usin gDS HPhoto No. from 1 in 5 asbestos- C ck ctiOn for Store all unreA~aPcc J

tutee str uctures to 700 1~ilmeat(1at 4) Grid acceptance: containing samples) <50% undlaaoIV r, overlapped or o a coverage otals 11 Aspect Ratio <10% particulate coverage >50% Struct. = ) 0.5um & > 5:1 overlapped grid equate at Least 20 unfolded or N. Not Observed (DS spectrum or diffraction Pattern) <57Lholesoroauearaaa F, B C M 5um properties conforming Positive diffraction pattern Unused portion to laboratory identificationntcriteria observed. of niter Chrysotile Ofon for (020) rsflaeiinns. Avoided portion For ohrsnUIs 0.35nm ■peeing spacing UU lain' line repast streaking at niter of (110) and (130) renactioae. Poruon or ratter (2mmaide) Amphibole line re peat and a to Par ampblbo no omnm layer Una spot ■Wale( to willect to euminallon 3.5 ratio of rasa-taloned layar (O.53nm). Iayer lies repeat distance Ambiguous ide ■ppcecct conforming to laboraWry . AMPHIBOLES IdenUflcation criteria observed. Amoeite 1-3 fibers) F= Single Fiber (1-3 fibers<1 intersections = nber diameter apart) 25mm tiller RY1ea• Crmmidolite Non — asbestos B= Bundle (>5 Anthophyllite Cu Cluster (>3 intersections) StoPPles W= Yatria >oo ./c.0. .r to I.t 4 C.O. Tremolite Non -identified

NYC-WTC 000104106