NYC-WTC_000189148

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BO.E Volume (liters): 1920 Lab Group #: 6658 Filter Type / Filter Area: MCE 385 nine Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: I Area Examined: 0.04496 mra-

GRID BOX: Maonilication: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/13/02

Analysis Performed By: MARK PEYSAKHOV

GO.- Structure Structure Type Length ID of Structure Norx EDS (Nonadb No >=05 pi Chrys Amphibole Nonasb Ambig/ND No Coord i ® C M <5p >=5p Elements)

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <60% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <'0% 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 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_003084008

NYC-WTC_000189150