TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 5960 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mm'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/24/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure i Structure Type [ Length ID of Structure N or V EDS No (Nonadb F B I C mT >=5|j 1 Chr^ I Ampriibole Nonasb Ambig/ND No Coord <5p Elements) ■'

. ji .... . 43.

Struct = > 0.5p >5:1 Aspect Ratto Grid acceptance: N = Fesitive ditfraclion pattern preperties conforming to <50% uniJissoived filter. Dveriapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolced or overlapped gnd squares <5% F B C M >5u •V EDS spectrum conforming to laboratory doles 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) Antdophyliile Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified ( ! NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458375 SUBJECT TO PROTECTIVE ORDER NO, 2, SEPT, 2008

NYC-WTC_000179172