TEM analysis data sheet, NYC BOE site, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5^46 - 10/23.^'01

Lab Sample No. 52052 Itsr Type MCE 25 mm Operator Cli-mt Spl. Nc. & Filter Area 385 mm

Instrument I.D. EM 10 Grid I.D. Disk No. Screen Magnification 16 4OCX (GO) .Area 0 . 01124 mm' Comments Acc Voltage 80 kV No. GO to be Analyzed _4 ( 3.14“ Struct. CorSDd C s/mm'‘z

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

2: 3

^^Phot3 No. (from 1 in 5 asbestos— Identify all structures using EDS Check diffraction for asbeatoa Store all unrepeated spectra containing samples) Grid acceptance:! structures up to 70s/^in (1st 4) SLrui:t_ s > 0.5um 1 > 5 1 Aspect Ratio <50% undisaolvecT filter, overlapped or folded <10% particulate coverage >50% coverage N= Hot Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals <5X holes or opaque areas F B C M > bum Fositive diffraction pattern properties conforming ti) laboratory identification criteria observed. •Unused portion For ehrysotlle: 0.70nm spacing for (020) reflections, of filter O.SSnm spacing for the layer line repeat, streaking Chrysotile of (110) and (130) reflectlnns. -Avoided portion of filter Far amphiboles: 0.33nm layer line repeat, and approx. Portion of filter (2mtn vide) 3.5 ratio of non-t*inned layer line spot spacing to ■ubject to examination Amphibole h.yer line repast distance (Q.S3nm). EDS spectrum conforming to laboratory Ambiguous Uentification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersectlona = 1-3 fibers) Amosite Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 2Smm rtllar Crocidolite Non—asbestos I stopping Rulea: L——. Anthophyllite Ms batrix NSD» No Structures Detected L:\ DA rA\ PRIVAT?\ l«KBC\CA0D''rSM3 [ >30 i/C,0. or in tat 4 C.O. Tremolite Actinolite Non-Identified 9/2Z/9B

CITY_21MC100_003107227

NYC-WTC_000185599