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): 1944 Lab Group #: 6408 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mm-

GRID BOX: Ma2nification: 20,000 GRID IP: JiVZvE" CP Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: M/vRK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

0^ — c-

i I Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction partem properties conforming to "50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed l_ l_ _ t^ * XtX: AM At MM <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% T B C M >5u V= 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 T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467464 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180742