TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6703 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0 01124

Client Sample #: 10 Area Examined: 0.04496 mrn-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/17/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor 7 EDS (Nonadb No F B [ C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

z2- ^37^ 4

Struct = >0.5n >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern oroperties conforming to ^50% undssbved filter, overtapped or folded Totals I n Im m . .oJ —* ys <10% particulate coverage >50% coverage ate laboratory identification crreria observes

7= EDS spectrum conforming to laboratory least 20 unfolded or overiaoped grid squares <5% holes or opaque areas Tf B c M >5p

identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected . L .1. I.

CONFIDENTIAL, CITY_21MC100_003467985 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181106