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): 1840 Lab Group #: 7278 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIDED: J Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: /\/i ROMAN PEYSAKHOV

- Structure- Structure Type Length ID of Structure N or V EDS No Nariadb F B C M >=05 y Chrys Amphibole Nonasb Ambig/ND <5y Elements)

__L_ y/-----

Struct = > 0.5 y .> 5:1 Aspect Ratio Grid acceptance: yis Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

y/- EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas fTb c M identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ; Anthophyllite ; Non-Asbestos I Tremolite \ M = Matik Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470678 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176660