TEM Asbestos Air Sample Results, NYC DOE, Aug 2002

NYC 9/11 Public Portal Document

TEMAsbestosfair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab CtFOUP #: 8760 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^ GRID BOX: 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 < EDS No (Nofisdb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

53 -2 . I

Struct = > O.op > 5.1 Aspect Ratio Grid acceptance: ■A Posiiive diffraction pattern properties conforming to <60% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5u 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 M -■ Matrix Tremolite Actinolite Non-ldentified NSD = No Structures Detected L.

CONFIDENTIAL, CITY_21MC100_003430570 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175205