Asbestos air analysis results, H.S., April 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1920 Lab Group #: 7333 Filter Type / Filter .Area: MCE 385 mm" Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 GRID BOX: Maonification: 20,000 GRID ID: Accelerating V^oltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/5/02

Analysis Performed By: MARX PEYSAKHOV

GO. Structure Structure Type Length ID of St'ucture N or N EDS (Noradb No F B C >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

A S'-'

i I i

■ i

1 s Struct = >0.5p .>5:1 .Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or ovenapoed grid squares <5% p 7 7 C M >5u 9= EDS spectrum conforming to laboratory holes or opaque areas L identification criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fibs" diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections I Anthophyllite Non-Asbestos T remolite M = Matrix Non-ldentified j NSD = No Structures Delected Actinolite I

CONFIDENTIAL, CITY_21MC100_003459907 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179527