NYC-WTC_000200212

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 557H - 09/28/01 Operator 2-'^’" Lab Sample No. 59725 Fil-er Type MCE 25 mm Client Spl. Nc. 10 Filter .%rea 385 inm*2 ,— Ins crument I.L. SM 10 CRX Gri-d l.D. Disk No. Screen Magnification 16,400X (GO) Area 0 01124 mm*‘2 Comments. Acc- Volcage 3D kV No. GC to be Analysed .4 7 scrjcc ;cr5>jci. co 70

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

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Store all unrepeated apectra-^ Photo No. (from 1 in 5 asbestoso identify ail structurefl using gPS Check dirfracUon for aabcatoa containing aampica) Grid acceptance;! alructm-eg up to 70w/^m (l«t *) Struct = > O.Sum A > 5:1 Aspect Ratio <S03C undlflsalvetfrnter^oMerlappeSoi^ToJfle^^™' <10X particulate eoverage >SQX coverage Ns Not Obaerved (EDS spectrum or diffracUon pattern) at least 20 unfolded or overlapped grid squares Totals <5X holes or ooague areas FoalUve diffraction pattern praparUaa eonformlng F B C M Sum to laboratory idantlfleaUon criteria obaervad. Jof^nite^ ■Unused aerUen For ehryaoUla: Q.TSnm apaemr for (OZO) raflBCtionB, or niter Chrysotile O.aSnm apootnf for Ube layer line repeal, atreaMlni of (UO) and (130) raneetiona. Avelded porUon of niUr For imBhibolBs: (Lsanni layer Une repeat, and approx. (Bram Widal 3.S ratio of non-tvinnee layer line apot apacing to \ aubjtet to examination Amphibole layer Une repeat diatance (0.53nm).

SDS spectrum sanforming to laboratory identification entena observed. AMPHIBOLES Ambiguous F= Single Fiber (J-3 Inbereectlona a 1-3 fibers) Amosite B= Bundle (>3 flben <1 fiber diameter apart) C= Cluater(>3 intamectlonfl) 35mm filler Crocidolite Non-asbestos I J Slapplnc Huiea: t——, Ma Matrix Anthophyllite NSD= Ne SLructuros Dctoctod I >40 i/C-a. ar In 1st 4. G.O. Tremolite Non—Identified L\DATA\PRlYATE\,WlKEC\CADCNXEJ<a Actinolite

CITY_21MC100_003267073

NYC-WTC_000200212