NYC-WTC_000225832

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BO.E Volume (liters): 1944 Lab Group #: 6220 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0.04496 mm= GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/29/01 ■

Analysis Performed By: MARK PEYSAKHOV

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

Z /

Struct = > 0.5p >5:1 Aspect Ratio Grid 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 NSD = No Structures Detected

CITY_21MC100_000622576 NYC-WTC_000225832