TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6872 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01 124

Client Sample #: 07 Area Examined: 0 04496 mm-

Magnification: GRID BOX: lYV' 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 9 EDS (Nonadb No F B C M >=05 p Chrys Amphiboie Nonasb Ambig/ND No Coord <5p Elements')

/IJ ifl

I

Struct = > 0,5)1 >5:1 Aspect Ratio Grid acceptance:

9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% B C M i >5u y= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single "^iber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ; C = Cluster (>3 Intersections) Anthoptiyllite i . Non-Asbestos ] Tremolite M = Matrix Actinolite j^4OTMdentified~~j ! 1 NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468223 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181258