TEM air sample results, 125 Liberty St, Oct 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 3600 Lab Group #: 9041 Filter Type / Filter Area: NICE 385 mm2 Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.24728 mm2

GRID BOX: 1g 7.S: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/30/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor EDS (Nonadb No F B C M >05 is >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5 Elements)

2 —3 Al 2. ._.

[1-1i v

. '3---I V

It k I -- V i2. C. 2- 2'Z —Z3

•2 7 4

2M - 3/ V [7 z :32'3 V v

/ 1 v1 ,

A Photo No. Prom 1in5 asbestos con inrno samo iiF owupwi+k4. elm

Struct = > 0.5}i .> 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals v Positive diffraction pattern properties conforming to <10% particulate coverage >50%gridcoverage ate squares <5% laboratory identification criteria observed least 20 unfolded or overlapped F B C M >5i holes or opaque areas 4= EDS spectrum conforming to laboratory Chrysotile identification criteria observed AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ( i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite onIdentiriedflflfl NSD = No Structures Detected _ _ . ._

NYC-WTC 000131504