Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS 10/25/01 LAB GROUP #: 5762 - Operator Filter Type MCE 25 mm Lab Sample No. 62248 Filter Area 385 m 2 Client Spl. No. 34 Disk No. Grid I.D. Instrument I.D. EM 10 CRX Commence (GO) Area 0.01124 mrr Z 70 s/mm"2. ~ Screen Magnification 16 a00X 6 ( ..721 Struct. Coss d. to Ne. GO to be Analyzed Act. Voltage 60 kV EDS structure Type Length I.D. of Structure Nor ✓ (Nonasb. G0. Structure Nonasb. Ambig./ND Elements tO.5 um 5um Chr s. Amphibole No Coord. No. F H C M urn

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r Store all unrepeated ;Pe~o~a Th ______ dure■ upa~pCe60S Check diffraction for asbes ■ identify all sCvct Photo No. from 1 in 5 asbe■t0s- iptm acce containing samples) <50% undlssolva er, overlapped or o e >50% coverage Totals Struct. = > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage squares C > 5u m N. diffraction Patters) at least 20 unfolded or overlapped grid F B M Not Observed (6DS spectrum or <5% holes or opaque areas Properties conforming Unused Portion Positive diffraction pattern to laboratory identification criteria observed.retlecUon.. of niter Chrysotile a.73nm •p.aln( for (020) AvoidedPotion of rite For chrysoUl- for the layer lint repeat. streaking a.330m .paoina or niter 0f (110) end (30) ranaatiens. PerUea of lotar dd.) Amphibole Per amphibol 0.07nm layer line repeat. and apprea sublmt m non-t>rianed isper spot spacing to examination 3.5 ratio of layer ling repeat (b.`53 distance AMPHIBOLES Ambiguous 209 s team conforming to laboratory idea (cation criteria observed. Arnowite intersection. = 1-3 fibers) Crocidolite Non —asbestos P= Single Fiber (1-3 fiber diameter apart) 25mm railer B= Bundle (>3 intersections) fibers <1 gtopping Bu t s: Anthophyllite C= Cluster (>3 '^-Amh ylli NYC-WTC 000104125