TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Vokime (lirers): i. 936 Lab Group #: 5060 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 20 Grid Opening Size: 0 01124

Client Sample #•. 20 Area l/xaminec!: 0.04496 mm*

GRID BOX: Maonification: 20.000 GRID ID: z Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/24/01

■Analysis Performed By: MARK PEYSAKBOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B j C M '=06 u >=5p Chrys Ampnibole Nonasb Am6igZND No Coord Bleinents)

, r. '

Struct = > 0,5(1 > 5:1 Aspect Ratio Grid acceptance Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals identification criteria observed<110% patticulate coverage >50% coverage ale __ _______________________ labcratory least 20 unfolded or overlapped grid squares <5% F B M >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fioer diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Non-Ideiitified j Actinolite NSD = Nd Structures Detected

CONFIDENTIAL, CITY_21MC100_003458378 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179173