NYC-WTC_000191402

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Voliiiiie (liters): 1928 Lab Group #: 7851 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 8 Area Examined: 0.04496 mm^

GRID BOX: Magnification; 20,000 GRID ID: 4? Accelerating Voltage: too KeV # Grid Openings: 4 Anuivsis Date: 5/25/02

Analysis Performed By; MARK PEYSAKHOV

GO Structure Structure Type Length ID of ’-tructure Norv EDS (Nonadb No F B C M >=05 p >=5p Ctirys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

- -2?

Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance: V= Positive diffracbon pattern properties conforming to "50% undissolved filter, overlapped or folded Totals laboratoty identificabon criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ■^= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clii sotile ' AMPHIBOLES ' An\ uibole F = Single Fiber Amosite Ami iioLis B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Non-A estos Tremolite M = Matrix Non-Idc tiified Actinolite NSD = No Structures Detected

CITY_21MC100_003090672

NYC-WTC_000191402