TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NV'C BOE Volume /liters): 1944 Lab Group #: 5975 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 13 4 Area Examined: 0.04496 mm-

GRID BOX: $^7 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GC, Structure Structure Type Length ID of Structure N or 4 EDS ! No (Nonadb F 3 C M •=05m ■ >=5(j Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

=5C / 2 P-Z. 0 7. // 5®^

) '

Struct = > O.iu > 5;1 Aspect Ratio Grid acceptance; 7= 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 y= EDS spectrum conforming to laboratory holes or opaque areas identification criteria ooserved Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ; Tremolite M = Matrix Non-Identified I Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458449 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179203