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): 1784 Lab Group #: 7376 Filter Type / Filter .Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 14 ■Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID IP: -V Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/10/02

■Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 (J : ■=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

-z- -------- 3

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

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

CONFIDENTIAL, CITY_21MC100_009505371 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178874