NYC-WTC_000201227

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7291 Filter Type / Filter Area: MCE 385 miM

Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm’

GRID BOX: Magnification: ' 20,000 •t.) Accelerating Voltage: 100 KeV GRID ID: Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor 7 ECS (Nonadt No If B C M >=05 p ■=5p Chrys Amphiboie Nonasb Ambig/ND . Elements) M <N No Coord . <5p

' -r A) '77

/A VtA

r

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: <1= Positive diffraction pattern properties conforming to <50% undisscived Alter, overlapped or folded Totals laooratory identification criteria observed <10% -particulate coverage >50% coverage ate least 20 unfolded o' overlapped grid squares <5% F B I C M >.5p EDS spectrum conforming to laboratory doles or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle S<3 fibers <1 fiber diameter apart Crocidolite- Ambiguous C = Cluster !>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_011275498

NYC-WTC_000201237