TEM asbestos air analysis log, Sample 14, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 8760 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0,01124 Client Sample #: 14 Area Examined: 0,04496 mm^ GRID BOX: / ^7/ Magnification: 20,000 GRID ID: / Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No Nonasb (Nonadb F B C M >=05 |j >=5p Chrys Amphibole Atnbig/ND Elements) __ No Coord

X I

Struct = > 0,5(1 .> 5:1 Aspect Ratio Grit) acceptance: 7 = 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 ovedapped grid squares <5% F B C M >5p 7- 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 Tremoiite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430565 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175200