TEM analysis data sheet for asbestos air sample

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP f 4/c; Lao Sample No. 15 5 Type MCE 2 5 mtri Coera cor client Spl. No. Are ci 535 miu

Instrument I.D. Grid I.D. Desk No. Screen Maqnification 16,400X (GO) Area 0.01124 mm' Comments Acc. Voltage 3C .<V No. GO to be Analyzed _4 I 3.14" Struct, Corspd.. ~o 7C 5/m^2. )

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

'7C LIT -S’ 'ZZ /( Zi

dr

i Store all unrepeated spectra--^ Photo No. (from 1 in 5 eabesloa- Identify all structures using EDSJ Check diffraction for asbestos containing samples) Grid acceptance^ structures up to 70H/:^m (Ist 4) <50% undisBolvea filler, overlapped or folded Struct, = > D.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage N=s 'iot Obaerved (EDS tpectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <SX holes or opaque areas F B C M > Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed, 'Unueed portion I of filter I'or chrysotile: Q.73nm saactni for (OSO) reflectiona, O.SSnm ipacing for the layer line repeat, streaicinc Chrysotile t -Avoided portion of (110) and (130) reflections. of niter Tor amphiboles; 0.33nm layer line repeat, and approx. Portion of fitter (2mm wide) 11.3 ratio of non-twlnned layer line spot apaeing to subject to examination Amphibole layer line repeat distance (O.SSnm). S EDS ipectrum conformtn* to laboratory Ambiguous identincatioR criteria observed. AMPHIBOLES F= ‘Eingle Fiber (1~3 intersections - 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) ____________2Smm filter Crocidolite Non-asbestos C= Cluster (>3 intersections) f Stoppinf Rulea: )--------- Anthophyllite NSD:= No Structure, Delected | «/C.0. or In l«t 4 C.O. Tremolite Actinolite Non-Identified L:\DATA\PRIVATE\KIKEC\CADDVEM3 0/22/06

CITY_21MC100_003107286

NYC-WTC_000185608