NYC-WTC_000229901

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1840 Lab Group #: 8002 Filter Type / Filter Area; MCE 385 mm- Lab Sample #: 17 Grid Opening Size; 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^

GRID BOX: Magnification; 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/8/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor V EDS No Ambig/ND (Nonadb F B C M >=05 p >=5p Chrys Amphitiole Nonasb Elements) No Coord <5p

■g .----- dO-

Struct = > 0.5p -> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5m '/= 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 AcUnolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388462 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229901