TEM asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6548 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm^ GRID BOX: 7^ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/3/02

Analysis Performed By: ROMAN PEYSAKHOV

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

I

6

7^----- 1

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: V= Positive diffraction pattern properties conforming to *■:60% 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 C M >5|J V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile FaMPHIBOLES i Amphibole F = Single Fiber : Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467696 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180897