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

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7717 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/11/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

____ £2

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

y = 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 overlapped grid squares <5% F B C I M >5m \= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster !>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldcntified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003460730 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179643