NYC-WTC_000230219

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 6527 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 21 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/1/02

Analysis Performed By: pp ROMAN PEYSAKHOV

1 GO- Structure Structure Type Length ID of Structure NorV EDS iI No ' Coord No F B C M >=05 U <5(J >=5iJ Chrys Amphibole Nonasb Ambig/ND (Nonadb Elements)

a

Struct = > O.Sp _> 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 >5u ■>/= EDS spectrum conforming to laboratory boles or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3388937 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230219