NYC-WTC_000229766

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 8147 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/17/02

Analysis Performed By: f ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Ncnadb F B C M >=05 u :>=5p Chrys Amphibole Nonasb Ambig/ND

Tsi <5p Elements)

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 'I = Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals latwratoiy identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded oroveitapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = 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_21MC1OO_OO3387895

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229766