NYC-WTC_000192928

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 6637 Filter Type / Filter Area: MCE 3.85 mm-' Lab Sample #: / Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0,04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: >77T( Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/11/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or EDS No (Nonadb F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5u tLtements)

Pf

ri Y

/u

Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance:

v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u ’/= EOS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile - AMPHIBOLES [ Amphibole ■ F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_003093490

NYC-WTC_000192928