Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP # •.

Lab Sample Mo. 61836 Filter Type MCE GF mm Operator CA-C.p ent Spl. Mo. 3r Area 368 min

Instrument I D. EY 10 CFlX Grid :.D. CO/ Disk No.

reen Magnifitation 4 0 0?: (GO! Area 0.01124 mm Gomments

•Acc . Volcaore 8 0 kV No. GO to oe .Analysed 4 147 Strut". Gorstd. to 30 s/mm'

Structure Sstructure Type Length I.D. of Structure EDS .GO. (Nonasb. No Coord. No. >0.5 um iF B C M < 5 um Sum Chrys. Amphibole Nonasb. ;Ambig./ND Elements)

.J '

i- 4

Photo No. (from 1 in 5 asbestos- I I ' I I Identify all structures using EDS Check dlffrecUon for asbestos Store all unrepeated spectra-^

containing samples) Grid acceptance:! atructurea up to TOa/Am (1st 4) <50X undiasolveQ filter, overlapped or folded Struct = > D.Sum > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ns Vol Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares I’osltive diffraction pattern properties conforming <6% holes or ooaque areas F B C M > Sum to laboratory identification criteria observed. ■Unused portion Tor chrysotile; 0.73nm spacing for (020) reflections, ll,33nni spacing for the layer Une repeal, streaking of filler Chrysotile -Avoided portion of (110) and (130) reriecLioni. of niter lor amphiboles: O.sanm layer line repeal, and approx. [Smm wide) U.S ratio of non-twinned lilayer line spot spBCln( to Amphibole layer line repeal dlalauco I(0.53nm).

IIDS spectrum conforming to IsborsLory identification criteria observed. Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) B= Hundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) f 25fnni niLer Crocidolite Non-asbestos M= .Matrix Stapptnc Rules: ----------- Anthophyllite >50 a/C.O. or in 1st 4 C.O. I NSD:: No Structures Delected Tremolite Actinolite Non-Identified U\ DATA\ P mV*TE\ M 1KKC\ CADOVEUS 9/22/9B

CONFIDENTIAL, CITY_21MC100_0 03470290 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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