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): 1816 Lab Group #: 7506 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/22/02

Analysis Performed By: fp ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No >=05 0 (Nonadb F B C M >=5p Chrys Amphibole Nonasb Ambig/ND No ' Coord <50 Elements)

2- AvQ 2 If -Z , <- V y 6'C

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: y= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >50 y = EDS spectrum conforming to laboratory holes or opaque areas 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 Tremolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_003101994

NYC-WTC_000183023