TEM Asbestos Air Sample Data Sheet, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Croup #: 8760 Filter Tvpe / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mrn- GRID BOX: <33^./ Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

•GO, Structure Structure Type Length ID of structure N or V EDS No (Nonadb F B C M >=05 pi Chrys Amphibole Nonasb Ambig/ND Elements) / Z? Coord <5u //7~-~Z7V~

Z^zz=:

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ■A 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 overlapped grid squares <5% F B C M >5u G EDS spectrum conforming to laboratory holes or opaque areas Identification critena 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 M,= Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430258

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175125