TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group 6872 Filter Type / Filter .Area: ■MCE 385 mnr Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 15 Al ea Examined: 0,04496 mm-

GRID BOX: Magnification; 20,000 GRID ID: <0 2^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 9 EDS No «05p I (Nonadb F B C M >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

6CL t PI byga ---------

<4 A

Struct = > 0.5(j >5:1 Aspect Ratto Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B M I >ctJ V= EDS spectrum conforming to laboratory C holes or opaque areas identification criteria observed Cln-ysotile AMPHIBOLES -Amphibole F = Single Fiber Amosite B = Bundle (<3 fibeis <1 fiber diameter apart Crocidolite 1 Ambiguous I C = Cluster (>3 Intersections) Anthophyllite 1. Non-Asbestos j Tremolite M = Matrix ) Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468231 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181263