NYC-WTC_000228934

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Vnlnnie (liters): 1800 Lab Group #: 776S Filter Type / Filter Area: MCE 385 mnf Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings; 4 Analysis Date: 5/16/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure N or EOS (tonada No Coord No F B C >=05 p >=52 Chrys Amphibole Nonasb Ambig/ND Elements) <5y

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance '/= Positive diffraction pattern properbes contomiing to <50% undissolved filter, avertapperS or folded Totals laboratory identification criteria observed <10% particuiaSB coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F M I1 i/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite Crocidolite Ambiguous 0 = Bundle !<3 fibers <1 fiber diameter apart C = Cluster (>3 dfersections) Anthophyllite Non-Asbestos Tremolite M = Malin Actinolite Non-identified NSD = No Structures Detected

CITY_21MC100_002901924

NYC-WTC_000228934