NYC-WTC_000188724

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5639 - 10/05/01 Lab Sample No. 6Q047 Filter Type ^CS 25 mm Operate r /7I / Client Spl. No. SHS-1>10-10/5-4Q Filter Arsa 385 mm'G Instrument I.D. EM 10 CRX Grid I.D. if 3 Cl * e G- Disk No. Screen Magnification Xg,4007 (GO) 0.01X24 mm^2 Comments Acc. Voltage 3 0 kV No. GO Do be Analyzed 4 '■ 3.147 Struct. CorsDd 7C s/mm*!.)

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 f /v5/^ Iff / /(T

Photo No. (from 1 in 5 aabeatoa- Identify all atructurea uaing BPS Chee c diffraction far sabeataa Store all unrepeated apectra containing aampleaj Grid acceptance:! atructurea up to 70a/Am (l»t +) <S0X undiaaolveq filter, overlapped or folded Struct. = > O.Suni Ie > 9:1 Aspect Ratio ■<1QX particulate coverage >50X coverage N= Not Observed (EDS ipectrum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <SX holes or opaque areaa F B C M > Sum to laboratory Idantiflcation criteria observed. •Ui portion Por chrysoLils: 0.73nm apacinc for (020) rsflscUons, of niUr Chrysotile O.aOnm spacing for the layer line repeat, streaking ■Avoided porUen of (110) and (130) reflecUona. of niter Per amphibaies: O.OOnin layer Une repeat, and approx. PorUon of filter (Smin wide) 3.3 raUa of non-t»inned layer line spot spaeing to tubject to axemlnaUon Amphibole layer line repeat dlsUnce (O.fi3nni). EOS spectrum conforming to laboratory Ambiguous identification criteria obaerved. AMPHIBOLES ?= single Fiber (1-3 InteraecUons = 1-3 flbera) Amosite a=s Bundle (>3 flbera <l fiber diameter apart) _________________ C= Cluster (>3 interaectlona) ! SSmm nitar __ a...___ I Crocidolite Non—asbestos Matrix i--------- ’ Stopping Rules: I--------- - Anthophyllite NSD= No Structures Detected | >»<» »/C.O. or in 1st 4 G.O. | Tremolite Actinolite Non-Identified kXDATAXPMVATEXHlKlGXCADDXTEMa 0/22/98

CITY_21MC1OO_OO3O82844

NYC-WTC_000188724