TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7230 Filter Type / Filter Area: MCE 385 Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20 000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4- Analysis Date: 3/27/02

Analysis Performed By: ROMAN PEYSAKHOV

Structure Structure Type Length ID of Structure Norv EDS /N No (Nonadb F B C M >=05 p :>=5p Chrys Amphibole Nonasb Ambig/ND No <5y Elements)

2^ z /life _K_

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 criiena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m a/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenred ' Chrysotile ^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 NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO347O6O8 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176619