TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 5986 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: 11/29/01

Analysis Performed By: ROMAN PEYSA.KHOV

GO. ‘ Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B I C M >=05 u : •=5p Chrys Amphibole Nonasb Amoig/ND No Coord Elements) <5p

2^ 2 J-

Struct = > 0.5p. >5:1 Aspect Ratio Gnd acceptance: 4= Positive diffraction pattern properties conforming to <50% jndissotvea filter, overlapped or folded Totals laooratory identification criteria observed <10% particulate coverage >50% coverage ate

7= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B C M >5rj holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter aoart Crocidolite Ambiguous C = Cluster >3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458504 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179237