Asbestos air analysis results, H.S., May 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1800 Lab Group #: 7717 Filter Type / Filter Area: MCE 385 min- Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/11/02

Analysis Performed By: ROMAN PEYSAKIIOV

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

vS

Struct = > 0.5|u >5:1 Aspect Ratio Gnfl acceptance; Positive diffraction pattern properties conforming to ^^0% undissolved hiter, 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 EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrirt Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO346O741 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179654