NYC-WTC_000230325

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6673 Filter Type / Filter Area: MCE 385 mm^

Lab Sample #: 7 Grid Opening Site: 0.01124

Client Sample #: 7 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 ~ Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

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

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 observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identiflcation criteria observed Chrysotile . ‘ AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart ; Crocidolite Ambiguous C = Cluster (>3 Intersections) 1 Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389068 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230325