NYC-WTC_000230346

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6687 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of,Structure N or V EDS No (hJonadb F B C M >=05 M >=5)J Chrys Amphibole Nonasb Ambig/ND No Coord <50 Elements)

J/ IL •1

z?

Struct = > 0.5 p .> 5:1 Aspect Ratio Grid acceptance: ^= Positive diffraction pattern properties conforming to ^^0% undissolved filter, overlapped or folded Totals laboratory identification criteria obsen/ed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u ■ EDS spectrum conforming to laboratoiy holes or opaque areas identification criteria obsewed Chrysotile j AMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart i Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos I Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Oetected I

CONFIDENTIAL, CITY_21MC100_003389101 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230346