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): 1920 Lab Group #: S760 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: /a-// Magnification: 20,000 GRID ID: IX^ 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 NorV EDS No. (Nonadb F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <50 Elements) /> ■'fPM - Ap u

5

Struct = > 0.5)j >5:1 Aspect Ratio Gnd acceptance: V= 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% B C M >5u EDS spectrum conforming to laboratory holes or opaque areas Chrysotile [ identification criteria observed AMPHIBOLES Amphibole j F - Single Fiber Amosite S - Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C--Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430260 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175126