TEM asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEMAsbestosfair) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 7192 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 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: 3/24/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or v/ EDS (Nonadb No F B C j M >=05 p >=5p Chrys Amphibole Nonasb Am6ig/ND Nd Coord <5p Elements)

—-id-

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 >5p /= EOS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES j Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Trerriolite M = Matrix Non-Identified ! Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467058 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180484