TEM asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7540 Filter Type / Filter Area: MCE 385 Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm^

GRID BOX: Maenification: 20,000 GRID ID: 3 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/27/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5p

C 17-^

I

Struct = > 0.5^1 >51 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filler, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 Lintoided or overiapped grid squares <5% F B C M >5p v3 tOS spectrum conform ng to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diarneter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Non-Identified 1 Actinolite N3D = No Siruciures Oelectec

CONFIDENTIAL, CITY_21MC100_003471303 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177087