NYC-WTC_000203723

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 7657 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/6/02

Analysis Performed By: A ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS No (Noradb F B C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND

s No Coord <5p Elements)

/i 5C ::

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: A- Positive diffraction pattern properties confomiing to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5u a/= EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_004081955

NYC-WTC_000203723