NYC-WTC_000230427

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 18 Lab Group #: 7603 Filter Type / Filter Area: MCE 385 Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 4.37236 mm^ GRID BOX: Magnification: 20,000 GRID ID: /Z/Y Accelerating Voltage: 100 KeV # Grid Openings: 389 Analysis Date: 5/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No (Nonadb F B C M >=05 M >=5iJ Chrys Amphibole Nonasb AmbigyND No Coord <5|J Elements)

Ei 4

Struct = > 0.5|i > 5:1 Aspect Ratio Grid acceptance; n/= 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 >5|j x/= EDS spectrum conforming to laboratory holes 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_001898255 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 NYC-WTC_000230427