NYC-WTC_000229911

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1808 Lab Group #: 8038 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 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 Norv EDS (Nonadb No F B C M >=05 p >=5m Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

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Struct = > 0.5p > 5; 1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsenred <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C >5p y = EDS spectrum conforming to laboratory M holes or opaque areas Idenbfication criteria observed Chrysotile i AMPHIBOLES : Amphibole F = Single Fiber \ Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anttiophyllite Non-Asbestos ; Tremolite M = Matrix Non-Identified I Actinolite NSD= No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388481 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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