TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: OTC BOE Volume (liters): 1944 Lab Group #: 5986 Filter Tvpe / Filter Area: MCE 385 rrrrr Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/29/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 4 EDS (Nonadb No C >=05 u >=5)J Chrys Amphibole Nonasb i Ambig/ND No Coord Elements) <5p

/ /V 3 !

4 V / H

Struct = > 0.5)1 „> 5; 1 Aspect Ratio Gnd acceptance: \= 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 overiapped grid squares <5% F B C M >5U V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile AMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle '<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I T remolite M = Matnx Nou-Identified Actinolite NSD = No Structures Deteaed

CONFIDENTIAL, CITY_21MC100_003458508 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179240