TEM analysis lab report for sample 30346, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5523 - 10/06/01

Lab Sample No. £0346 Filter Type MCE 25 mm Operator Client Spl. No. NgH3~;;BF.--0/b-04 Filter Area 365 mm^2 Instrument I.D. EM 10 CP.X Grid I.D. Disk No. Screen Magnification L€,40OX (GO) Area Q.01124 mm^2 Comments Acc. Voltage BC kV No. GO to be Analyzed 4 ( 3.147 Struct. Corspd. to 70 s/mm^2.)

.go.__ Structure Structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No Coord. No. F B C M > 5um Chrys Amphibole Nonasb. Ambig./ND Elements) < 5 um

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^PhoUi No. (from I in 5 asbestos- Identify all atructures using EDS Check diffraction for aabestoa Store ell unrepeeted spectre containing samples) Grid acceptance:! structures up to 70s/A]im (let 4) Struct. = > O.Sum & > 5/1 Aspect Ratio <50% undiasoiveQ niter, overlapped or folded <10X particulate coverage >50% coverage Ns Net Observed (EDS spectrum or diffrscUon pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum Ui laboratory identification criteria observed. ■UnuMd portion For chrysotile; Q.73nm spacing for (020) rensetions, of niter Chrysotile a Mnm spacing for Lhe layer line repeat, streaking ‘Avoided porUon of (HO) and (130) renecUema. or filter Far amphiboles: O.S3nm layer line repeat, and approx, (2mm wide) 3 5 ratio of non-tvinned layer line spot spacing to Amphibole layer line repeat distance (0.53ain).

EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= single Fiber (1-3 intersections = 1-0 fibers) Amosite Bs Bundle (>3 fibers <1 fiber dismeter apart) C= Cluster (>3 Intersections) ZSmm filtar J Stepping Rules: L Crocidolite Non-asbestos Ms Uitrli Anthophyllite NSD= No Structures Detected >S0 i/C.O. or in iat 4 C.O. Tremolite Actinolite Non-Identified LkDATA\PRIVATE\MlKtC\CADnVT8U3

CONFIDENTIAL, CITY_21MC100_003469822 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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