TEM analysis data sheet for air sample 7100-2, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7100 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm*

GRID BOX: av/ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid-Openings: 4 Analysis Date: 3/16/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or '/ EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND ■ No I Coord <5p Elements) / 2 0^'^

Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: v/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

1- EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B C M >5u holes or opaque areas 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 f Non-Asbestos I Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003391091 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178855