Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

C ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #: 5762 - 10/25/01 Operator 62220 Filter Type MCE 25 mm Lab Sample No. Filter Area 385mm-2 Client Spl. No. 6 Disk No. Grid I.D. To Instrument I.D. EM 10 CRX 0.01124 mm^2 Comments )GO) Area Screen Magnification 16,40OX Corspd to 70 s/mmi2 6 4.721 Struct 80 kV No. GO to be Analyzed Acc. Voltage N or/ EDS Length I.D. of Structure (No GO. Structure str1LGLMn Typo Elements l um > 5um Chrys.l Amphibole I Nonasb. IAmbig./NDI No Coord. No. F B C M :—-

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1 Photo No. (from 1 in S asbestos- identify all structures usin 6DS Check ura~r u ti to for aebeetal tftm (lot 4) ctre spe J

[Grid acceptance: containing samples) < 1 07G undittsolve filter, overlapped o parculate coverage >50% eover er o e Totals Struet = > 0.5um & > 5:1 Aspect Ratio <10% ti grid equarea ■at. least 20 unfolded or overlapped N= Not Observed (gOS spectrum or dl(fneUoa pattern) <5% holes or o a tie areas Positive diffraction pattern properties conforming observed. Unused portion to laboratory identification criteria spacing for (020) rs r a kin., or niter Chry sotile U.5 oh 0for peat..U+ekiag *voided portion 0.33nm spacing for th e Lyer a re of niter of (110) and (130) reflestloas. portion of niter (2mm de) Amphibole par .mph bo o o.33am 1■ref tine For repot. and appres. line opot spacing to subject to P 3.3 retie of nos-Mneed uyer examination layer line repeat distance (3.33nm). sDB spectrum conforming to laboratory pMPHI80LES Ambiguous idenUtloaUon criteria observed. AmOelte fibers) P= Single Fiber (1-3 Intersections = 1-3 23in nitsr CTOcidolite Non — asbe stos B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersection■) Mapping Rules: Anthophyllite M= Matrix >en ./C.O. or in let 4 0.0. Tremolite 1r,,,,_T~o~tjflPd

NYC-WTC 000104098