TEM analysis data sheet, NYC BOE site, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA£. GROUP E~4g - !■

Lab Saimple No. ,62074 Filter T’y^-e MCE 25 mrr Coeracor Client Spl. Nc Filter Area 39 5 min"2 Insr.rc-ment I.D. EM ID, CF^ Grid I.D. Disk Nc.

Screer. .Magnification l£ , 4Q0X (GO? Area 0 . 01X24 mr?."2 Comment£ Acc. Voltage 8 0 kV No. GC to be Analyzed 4 S . 14“ c 7C s/mm*2. '

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

2- 2 Z 3 ■ZJ z'-

1 1 1 Photo No. (from 1 in 5 asbestos- Identify all structurea using EDS Check diffraction for asbesUis Store all unrepeated spectra containing samples) Grid acceptance:! slruclures up to 70a/l?im (18t 4) <S0X undiBBolvea filter, overlapped or folded Struct = > 0.5um & > Sil Aspect Ratio <10X particulate coverage >50X coverage Totals N= Yot Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares I’ositive diffraction pattern properties conforming <5X hoieg or opaque areas F B C M > Dum to laboratory identificaUon criteria observed. •Unused portion I Tor chrysotile: 0.73nm spacing for (029) reflections, C.53nm spacing for the laysr line repeat, streaking (f (110) and (130) reflections. of fllUr -Avoided portion of filter Chrysotile 1 for amphiboles: 0.53nm layer line repeat, and approx. (2mm wide) C.5 ratio of non-tvinned ayer Une spot spacing to subject to examination / Amphibole layer line repeal distance (0.53nm)«

IDS spectrum conforming to laboratory iilentification criteria observed. amphiboles Ambiguous Fe Single Fiber (1-3 interaecdona = 1-3 fibers) Amosite B= Eundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections I 25mm filler Crocidolite Non-asbestos -------- i stopping Rules: I----------- - Us Uatrix Anthophyllite NSD= No Structures Detected >S0 s/C.O. or in Isl 4 C.O. Tremolite Non-Identified L-\ D> TA\ PRIYATE\ HIKSC\ CADO'O’EMS 9/22/98 Actinolite

CITY_21MC100_003107238

NYC-WTC_000185601