Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

TEM ANALYSIS ATC ASSOCIATES INC. - 01 LAB GROUP #• 5162 - 10 25 operator Filter Type MCE 25 mm Lab Sample No. 62224 385 Filter Area m m"2 Client Spl. No. 10 J v Disk No. Grid I.D. Comments Instrument I.D. EM 10 CRX 0.0 (GO) Area ruct. Corspd to 16 400X , 4 172 St Screen Magnification Analyzed 6 No. GO to be Acc. Voltage 80 kV EDS Nor✓ I.D. of Structure (Nonasb. Length g Structure structure Type Ambig./ ND Elements GO. 3o•5 um , 5um Chr s. Am hibole Nonasb. No Coord. No. F B C M < 5 um

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at 4) asbestos- identify all stand a u° Ce ~S st ructures u ~Oa 1~m Photo No. from 1 in 5 0 to S containing samples) <50% undplssolve r. over apps or o e coverage >50% d veragesquares Aspect 0510 <10% particulate overlapped grid Struct• _ > 0.5um & > 5:1 F B C M diffraction pattern) at least 20 unfolded or <Si halve or opaque area! N= Not Observed (SOS spectrum or properties conforming Portion positive diffraction pattern V= to laboratory identification criteria observed. of filter Chrysotile a cintfinsfor (020) rflecUon.. Avoided portion Per abrywtlls: 0.77nm the Layer repeat, .I eaalag of filler O.s7nm .paoiet for Partien of rester (2mm vide) Amphibole of (110) and (170) r eflections. repeat. and approl. Lion of to m layer ling For amphlboin : 0.57o 1570F line spot .Wetng es•a, ation ratio of non—lslnned di.taene (0.07nm1• lger line repeal Ambiguous AMPHIBOLES trum conforming to laboratory ✓= LDS • lcsuen criteria observed. Amoslte identi 3.5 nben) 25mm niter Crocidolite Non -asbestos -= Single Fiber (1-3 Intersections = 1-3 fiber diameter apart) Anthophyllite s= Bundle S>7 fibers <1 etepplfe Rules: T-"

NYC-WTC 000104102