Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB 1F OCP d - 26 ' 01 l Lab 3amp Nc. 63542 F i ;_ er Tyce ne,_c __ inn

Client Spl No. 36 a 3;E mm

:nstrumert EX - ^ y. 3r:5 _.0 Disk Nc

Screen Megniticat.cn 16,400:( (GCS Area 0 1_24 tnm Ccrnments

Acc. Volcaae 30 kV Nc. GO t_ ca r.a_y❑ed 1 4. S: .:Ct Corscd. - 70 5'mm

GO. Structure Length I.D. of Structure N or/ EDS (Nonasb. No, Coord. No. F >0.5 um str~Cj 5um3 IChrys. Amphibole Nonasb. Ambig./ND Elements)

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1 Photo No. (from 1 in 5 asbestos- Identify all atructures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures a to 7Oe i7tm (lot 4) <5O% undieeolve i er, over appe ar o e Struct_ = > 0.5um k > 5:1 Aspect Ratio Totals <1ox particulate coverage >5O% coverage Na Not Observed (EDS spectrum or diffraction pattern) let least 20 unfolded or overlapped grid squares <5% holes or opaque areas ✓ topositive diffraction pattern properties conforming laboratory Identification criteria observed. Unused portion Far em 020) ro t e aking, Oforntn spacing for epea of Filter Chrysotile a.09nm spameg for the layer line repeat, streaking Avoided portion of (110) and (130) reflections, of filter Per amphibole.: 0.03nm layer line repeat. and approa. Portion of filter mm .tits) 3.5 ratio of non-twinned layer line spot spacing to ..oleo m Amphibole layer line repeat distance (0.53nm). exammation

EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES Fo Single Fiber (1-3 intersections = 1-3 fibers) Amaslte 0= Bundle (>3 fibers <1 fiber diameter apart) 23mm filter Crocidolite Non —asbestos C= Cluster (>3 Intersections) ___J stopping Rule.: Anthophyllite in Matrix NSD= Na stsvcturea Detected a/G.0. or in lot ♦ C.O. I ' Tremolite Non —Identified AC tin Dhte V \DATA\PR1VATE\MIKEG\CADDV'EM3 9/22/99

NYC-WTC 000104303