TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1832 Lab Group #: 7574 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm' GRID BOX: Ma2nification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/29/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS : (Nonadb i No F B C M >=05 p >=5u Chrys Amphibole Nonasb Ambig/ND Elements) I No Coord <5p

^2 ii i/___ (I

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance:

7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B|C M I >5u v= EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed AMPHIBOLES Chrysotile i Amphibole F = Single Fiber Amosite 3 = 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 Cetected

CONFIDENTIAL, CITY_21MC100_0 03471358 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177124