TEM Asbestos Air Sample Data Sheet, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air),Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7102 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm^ GRID BOX: 9V-T Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/16/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of StructJ-e NorV EDS No (Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND ' No Coord <5p Elements)

3 iza-'

5/^ ------- -

Struct = > 0.5u _> 5:1 Aspect Ratio Grid acceptance: V = Positive diffraction pattern properties conforming to *5°? or folded Totals Iaborato7 identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% f F B C M >5u V* EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile Famphiboles I Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos i Tremolite M = Matnx Non-Identified ■ Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003466811 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180318