TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6500 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX: 7-7 Z Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/30/02

Analysis Performed By: ROMAN PEYSAKHOV

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

5, /// QU/ 1

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance; >/= Positive diffraction pattern properties Gonforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p ■/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotiie AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467614 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180837