Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS I LAB GROUP #: 5761 - 10/25/01

Lab Sample No. 62179 Filter Type MCE 25 mm Operator

I Client Spl. No. 06 Instrument I.D. EM 10 CRX Screen Magnification 16,400X Filter Area 38 Grid I.D. (GO) Area mm^2

0.01124 mm'2 Z nn Disk No. Comments

I Acc. Voltage

GO. No Coord. 80 kV

Structure Structure Type No. F B C M O•55 um Length No. GO to be Analyzed

> 5um Chrys. Amphibole 6

I.D. of Structure ( 4.721 Struct. Corspd. to 70 s/mm"2.)

N cry'

Nonasb. Ambig./ND Element.) EDS (Nonasb. um

z r

Eli I

I

I

I

I

I

I rnow fl u. t•rom 1 In o ea -ea•a. - weuua] «. ... rca.•• • ..l-' ........~ ...... ____.. ._• ----- -- -_. . .

containing samples) Grid acceptance: structures u to 70. l&tm (lot 4) <50% undianolved mLer. overlapped or folded Struct = > 0.5um 8 > 5:1 Aspect ItaUo <10% particulate coverage >50% coverage Totals N= Not Observed (E0 spectrum or dlffracUen pattern) at least 20 unfolded or overlapped grid squares <5% holes or o a ue areas V/= Positive diffraction pattern properties conforming Lo laboratory identification criteria observed. Unused portion For ahrysotls: o.73nm spacing for (020) renecUom, of filter Chrysotile O.23am spacing for the layer a repeat, streaking Avoided portion of (110) and (130) reflections. of filter Per amphlbela: O.ti3u layer line repeat, and apprea. Perms ~ L Rotor (emm .Ida) 3.5 ratio of non-twinned 4yar Una spot spacing to Amphibole ua~laaUon p layer line repeat distance (O.g3nm). EDS spectrum conforming to laboratory Ambiguous identUlcaUou criteria observed. AM PHIBOLES F- Single Fiber (1-3 intersections - 1-3 Rben) Arnosite B= Bundle (>3 fibers <1 nber diameter apart) 25mm tiller Crocidolite Non —asbestos Ce Cluster (>3 intersections) stepping Buiaa: Anthophyllite U= ta rts NSD= No Structures Detected >10 ,/C.o. or In 1st t C.O. Tremolite Non —Identified Actinolite

NYC-WTC 000104190