NYC-WTC_000228609

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7513 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size; 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm* GRID BOX: Magnification; 20,000 GRID ID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure Norv EDS ' No >=05 M (Nonadb i F B C M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) ! ------------------- 1 1 _______ I

1

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Struct = > 0.5p >5:1 Aspect Ratio Grid aoc8j«ance: V= Positive diffraction pattern properties conforming Io <50* undissolved titter, ovariapped 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 >5m V= EOS spectrum conforming to laboratory holes or opaque areas idmfificalton criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiter Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 IntersecSons) Anthophyllite Non-Asbestos TreiTWiite M = Matrix Actinotite Non-Identified NSO = No Structures Detected

CITy_21MC100_002901125

NYC-WTC_000228609