NYC-WTC_000208317

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yolume£liters)i 1920 Lab Group #: 8759 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm- GRID BOX: <5x7^ Magnification: 20,000 GRID ID: Vk.fr Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Perft rmed By: ROMAN PEYSAKHOV

GO, Structure Structu!e Type Length D of Structure Nor V EDS (Nonadb No F B C i M >=05 p Chrys Amphibole Nonasb Ambig/ND Elements) r / /3 Coord <5p

■Struct = > 0.5m >5; I .Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conformrig 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 >5p yl- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile rAMPHlBOLES ’ Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) 1 Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003021637

NYC-WTC_000208317