TEM asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7540 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Maenillcation: 20,000 GRIP ID: Accelerating Volta2e: 100 KeV # Grid Openings: Analysis Date: 4/27/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS I No - (Nonadb F 8 C M >=05 pi Chrys Amphibole Nonasb Ambig/ND Elements) I No Coord <5(j

J"-’ <

Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance:

7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria ooserved <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F ! B C j ■/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle i<3 libers <1 fiber diame'.er apan Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471305 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177089