TEM Asbestos air sample results, NYC BOE, May 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) CountSheet Client Name: NYC BOE Volume (liters'): 1928 Lab Group #: 7837 Filter Type / Filter Area; MCE 385 mm^ Lab Sample #: 14 Grid Opening Size; 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm^ GRID BOX: /// s Magnification; 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure Norv EDS No (Nonadb F 8 C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

fr 4=

Struct = > 0.5 p >5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped 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 >5p EDS spectrum conforming to laboratory holes or opaque areas identificab'on criteria 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-ldentified AcUnolite NSD = No Structures Detected

CITY_21MC100_0 04151558

NYC-WTC_000194583