Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP « 10 2

Lab Sample No. iANE Lt er Tv'pe MCE 2S mm. tDeracor ci-? Client Spl. Nc. Eilter Area 335 mm Inst.rvment i.r. =M ir Grid I.D, Disk No.

Scresr. Magnification 4 0 OX (GO! Area C . 01124 mm.''2 Comments Acc. voltage go kv No. GO Lo be Analyzed 4 4" Struct. Corspd. to 7C s, mm

GO. Structure Structure Type Length I.D. of Structure EDS ^0.5 um (Nonasb. .No, Coord. No. F B C M J. Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) < 5 um

g-

_r_ZZIZZZlJJ Photo Ne. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos structures up to 70a/i?im i ! ___________ :__________ 1} I Store all unrepeated spectra—^ containing samples) Grid acceptance:! <S0% undiasolved filter, overlapped or folded Struct. = > D.5um A > £:1 Aspect Ratio <10% particulate coverage >50% coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Fositive diffraction pattern properties conforming <S% holes or opaque areas F B C M > Sum 1 ! Li> laboratory identification criteria observed. ■Unuaed portion For chrysotile; 0.73nm ipacinr for (020) reflections, of niter Chrysotile j 0,53nm spacing for the layer line repeat, atreaking 'Avoided portion of (llO) and (130) reflections. Far amphiboles*. 0.53nm layer Une repeat, and approx. of fitter 12mni wide) r 3.5 ratio of non-tvlnned layer line spot spacing to Amphibole hiyor Une repeat distance (0.&3nm). vYs EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (l>-3 lnler>ectiDni s 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non-asbestos C= Cluster (>3 intersections | Ms blatrlK NSD= No Structures Detecled L\DA TA\ PRIV ATE\ MI KEC\ C A D EM3 >50 c J Stepping Rules: i/G.O.

0/22/08 or in l»t 4 Anthophyllite Tremolite Actinolite r Non-Identified j

CONFIDENTIAL, CITY_21MC100_003470280 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176445