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): 1824 Lab Group #: 6943 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample 10 Area Examined: 0.04496 mm"

GRID BOX: Maanitkation: 20,000 GRID ID: Accelerating; Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/6/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M aToTp I >=5p Chrvs Amphiboe Nonasb Ambig/ND No Coord Elements) <5p

——

n n

1—r

■■.....-r ■ ■

Strucl = > > 5 J Aspect Ratio Grip acceptance

\ = Positive diffraction pattern crooerties conforming to <50% undissolved filter, overlapped or foded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria obsenred east 20 unfolded or overlappea grid sguares <5% I B c >50 ;= EDS spectrum conforming to laboratory noes or ocaque areas ). I F identification criteria 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 I Tremolite M = Matrix Actinolite Non-Identified j NSD = No Structures Detected

CITY_21MC100_003102307

NYC-WTC_000183231