NYC-WTC_000196936

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 6898 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm-

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

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F I B C M >=05 pi Chrys Amphibole Nonasb Ambig/ND • No Coord <5u Elements)

s/^:___

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

Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals <10% particulale coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped gnd squares <5% F B C M i >5p 4= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <" fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Actinolite : Non-Identified : NSD = No Structures Detected

CITY_21MC100_003044227

NYC-WTC_000196936