NYC-WTC_000196990

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 6977 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/7/02

Analysis Performed By: MARK PEYSAKHOV

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

3- <5

Struct = > 0.5|r >5:1 Aspect Ratto Gnd acceptance: 4= 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 4= EDS spectrum conforming to laboratory holes or opaque areas identification 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-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_003044340

NYC-WTC_000196990