NYC-WTC_000230529

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5578 09/28/01 Lab Sample No. 59726 Filter Type MCS 25 twn Operator Client Sol. No. 11 Filter Area 385 mm' Instrument I.D. BM 10 CRX Grid I.D. 3 Disk Ho - Screen Magnification 16,400X (GO) Arsa 0.01124 Tnm'^2 Comments ACC. Voltage 80 kV Ho. GO to be Analysed 4 { 3.147 Struct. Corapd. to tq a/nira'^2.)

GO. Structure Structun Type Length I.D. of Structure n EDS or >0.5 um (Nonasb. No Coord. No. F B c M > Sum Chrys Amphibole Nonasb. Ambig./ND Elements) < 5 um 449 / Z. _JL_ ■? 1/ 1

Photo No. (from 1 ia 5 asbestos- IdenUfy all atructurea tialng BOS Cheek dirrneUoa for ubestos S tore all unrepeatad apectra — eontaininc samples) Grid aeoeptaaeesL structures up to TOa/Am (I(lai j 4) <aox undlaaolreif niierT cvcrlappad or roideii Struct, s > Q.&um & > 5; I Aspect Ratio <10* particulate corerage >00% CwweieM Na Nat Ohaarved (BOS apoctrain ar diffracUon pattern) at laaat 20 unfolded or od grid aquarsa Totals PoalUve dUTracUoo pattern prepertlea cen/emiini F B C M > Sum to laboratory IdanUfleaUoa crltarla obaarved. Janaad parttoa of Altar Chrysotile 53ii'’SS!5r’f5S“iL-^^ J?5L’SSSSS' •f (UO) and (lao) reflaauUs. •AvoMad porttaa ar Altar Far ampUbalaat O.Mam layer line repeat, and appre*. Portlea af Mtar (8Bim wMa) xa ratio er aon-teuaed lover Una ipet apaelnc to I MblOBt to aaaaUaatlan Amphibole Uyer Una repeat distance (&.anam). SDS spectrum aoBformlng to laboratory Ambiguous IdoBtineoUao eritarlo oboerved. AMPHIBOLES Fa SIncla Fiber (1-3 intoneetlons a 1-3 riben) Amosite Ba Bundle f>S Abera <1 Aber dlamoLer aoartl C= Cluster (>3 intanecUona) iTT""? Ibilaai aSnim Altar Crocidolite Non—asbestos Ms Matrix , Anthophyllite NSDa No Structuraa Detactad >aa s/C-O. ar la tat 4 C.Q. Tremolite Actinolite Non-Identified k\MTA\raiVAn\MlXBC\CADir9BHa 0/22/98

CONFIDENTIAL, CITY__21MC1OO_O11771561 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230529