TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8759 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: AcceleratineVoltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure Norv EDS f- (Nonadb No F B C M >=05 pi '=5lJ Chrys Amphibole Nonasb Ambig/ND No Coord <5 pi Elements)

/^=

If -X- I

Struct = > 0 5)1 >5 1 Aspect Ratio Gnd acceptance Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped gnd squares <5% F B C M >5p A- EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431225 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175484