NYC-WTC_000229909

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1832 Lab Group #: 8038 Filter Type / Filter Area: MCE 385 Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 y-----------

GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/10/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or EDS No {Nonadb F B C M >=05 p Ctirys Amphibole Nonasb Ambig/ND ,No Coord <5p Elements)

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Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance: = Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals laboratory Identification criteria obsenred <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identiftcatian criteria observed Chrysotile [amphiboles i Amphibole F = Single Fiber Amosite S = Bundle (<3 fibets <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388479 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229909