NYC-WTC_000228626

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7524 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or \ EDS No (Nonadb i F B C M >=05 p >=5(j Chrys i Amphibole Nonasb Ambig/NO <5)J Elements) i - ---------------1

~/r

4

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance; '/s Positive dilfraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identificalion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C M ! >5u ■/= EDS spectrum conformirig to laboratory holes or opaque areas identifcation criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fibfir Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite 4-I M = Matrix Actinolite Non-Identified i NSO = No Structures Detected

CITY_21MC100_002901159

NYC-WTC_000228626