TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7406 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 01 Area Examined: 0.04496 mm‘

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/15/02

.Analvsis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS T-T—(Nonadb No F B C M >=5p Chrys Amphibole Nonasb No Coord <5m : Elements)

V B® ' w t/___ -0___

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance;

7= Prtsitive diffraction pattern properties conforming to :50% undissolved filter, overlapped or folded Totals :10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M ! >5p 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ■AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471060 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176919