TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m’C BOE Volume (liters): 1944 Lab Group #: 5986 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 6 Area Examined: 0.04496 mm*

GRID BOX: Magnification : 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/29/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure .N or V EDS No (Nonado F B C M •=5p Chrys Amphibole Nonaso AmOig/ND Elements) No Coord <5p

y ! So _ll___ ■

Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j >/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile I 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 Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3458499 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179233