Asbestos fiber TEM analysis data sheet, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP -8 737 IC-'21/01 Dab Sample No . 18 2 3 Filter Tt’p* operaccr - ' A Clisnc No. Filter Area 3 8? rnrr

Instrument I.D. 5Y 10 Grid I.D Disk No. Screen Magr.ifroa 6.400X (GO) Area 3 01124 mm"2 Ccmmencs. Acc. VoDtace 83 iiV No. GO co be -Analyzed _4

Length I.D. of Structure EDS .20^ Structure Structure Type (Nonasb. No. >0.5 um No Coord. f! B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

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Photo No. (from 1 in 5 asbestos- identify all atructurea uHing EDS Check diffraction for aabeatos store all unrepeated spectra— containing samples) Grid acceptance:} structures up to TOs/i^m (lat 4) <S0X undisBolved filter, overlapped or Folded struct. = > Q.Sum 4 > 5:1 Aspect Ratio <IOX particulate coverage >50% coverage Totals N= Sot Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areae F B C M > Sum to laboratory identification criteria observed. -Unuaed portion i-'or chrysoLlla: Q.73nm spacing for (020) reflectlonx, O.dSnm spacing for the layer line repeat, streaking of niter Chrysotile -Avoided portion of (110) and (130) reflections. of niter [[ f Portion ot filter Eor amphiboiei: 0.53nm layer Une repeat, and approx. (2mm wide) :i.S ratio of non-l»inned layer line spot spacing to U I 1 subject to examination Amphibole layer line repeat distance (O.SOnm).

v/= EDS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambiguous F= Jilnfle Fiber (1-3 InteraecUons a 1-3 fibers) Amosite Bs Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non-asbestos

□ C= Cluster (>3 intersection!) J[ Stopping Rules: I Anthophyllite Kalrii NSD- ho Structure* Detected [ >50 «/G.O. ar in lat 4 C.O.

9/22/88 Tremolite Actinolite Non-Identified L-\ D,1TA\ P RIVATE\ M 1KBC\ CADD\rEM3

CONFIDENTIAL, CITY_21MC100_003470287 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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