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): 1960 Lab Group #: 7574 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0,01124

Client Sample #: 07 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/29/02

Analysis Performed By: ROMAN PEYSAKHOV

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

4”

Struct = > O.ap >5:1 A-spect Ratio Grid acceptance:

N = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory icentification criteria ooserved <10% particulate coverage >50% coverage ate least 20 unfolded or overlappea grid squares <5% F B cm! >5u \'= EQS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle l<3 fibers <1 fiber d ameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite I Non-Asbestos Tremolite M = Matrix ! \on-Identified i Actinolite I . . NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471361 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177127