TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: BOE Volume (liters): 1936 Lab Group #: 6028 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample#: 9 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/4/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS (Nonadb No F B c >=06 u Chrys Amphibole Nonasb ; Ambig/ND No Coord Elements) <5u

1 r/

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals labroratory identitotion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j i 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i amphiboleTJ Amphibole F = Single Fiber ' Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 3 ■ Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-I dent! Tied Actinolite NSC = No Structures Detected

CITY_21MC100_003104472

NYC-WTC_000183989