TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6928 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 05 Area E.xamined: 0.04496 mm- & Magnification: GRID BOX: 20,000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/4/02

Analysis Performed By: ---------------- ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor \ EDS No >=05 p i (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND . No Coord <5m : Elements)

■z. 2-

i i 1-------- f

Struct = > I).ip > -ill Aspect Ratio Grid acceptance:

</'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 2C unfolded or overlapped grid squares <5% /= EOS spectrum conforming to laboratory holes or opaque areas P B j C j M j >5p identification critena observed Chrysotile AMPHIBOLES Amphibole ---- ------ ------ 1------ F = Single Fiber Amosite 6 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468301 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181306