NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GR 4

Ldb Sample Me . 62551 r T;7pe MCE 2 5 "nm ’ c. * Client Spl. Nc. 45 .ar -Area 335 inm'l

Instrument 1 EM ID CRZ Grid , :.L Wk Disk Nc Screen Magr.i: icac xon L5.40OZ IGO) Area iTirr Comments Acs. Vol-ace SO Nc . GO cc be Anal;. ' 4 "2

GO. Structure structure Type Length I.D. of Structure EDS I »0.5 um - (Nonasb. [ No]Coord. No. ri B iC |M 5um < 5 um Chrys.i Amphibole I Nonasb. iAmbig./ND Elements)! TV?! t i i J 2 □ <2^ J-

1 i ! I ' i lU ___ _______ lJ_ Photo No. (from I in 5 asbestos- nn Identify all atructurea uatng EDS Check diffraction for aabestoa Store all unrepeated apectra !I containing samples) Grid acceptance: I structures uo to TOa/i^xm {l«t 4) <50X undiaaolveo niter, overlapped or foideH Struct. = > O.Sum k > 5:1 Aspect Ratio <10X particulate coverage >SOX coverage Totals N= Mot Observed (EOS spectrum ar diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas > Sum Positive diffraction pattern properties conforming to laboratory identification criteria abaerved. F —- C B ----- M •Unuasd portion For ehrysoUlet a.73nm spacing for (020) raneelions. of niter Chrysotile 0.33nm spacing for the layer line repeat, streaking of (HO) and (130) reflections. -Avoided portion of niter Far amphiboles: O.SOnm layer Une repeal, and appro*. Partlan of filter (2mfn wide) 3.3 ratio of non-lvlnned layer Une spot spacing to sublecL to examination I I / h Amphibole ! layer line repeat distance (O.SOnm). K /// 'N= EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous Fa Single Fiber (1-3 intersecUons = 1-3 fibers) Amosite 8= Bundle (>3 fibers <l fiber diameter apart) ______________ 25mm filter Crocidolite ! Non-asbestosi C= Cluster (>3 inlersectiona) _____ Ms Matrix !----------- - Stopping Huies: ----------- - Anthophyllite i NS3= Xu Structures Detected j Tremolite i Non-ldenLified ' Actinolite L:\OATA\PR1VATE\MIKEC\CAD0'TEM3 9/22/90

CITY_21MC100_002849285

NYC-WTC_000209927