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 filters): 1800 Lab Group #: 7119 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/18/02

Analysis Performed By: ROMAN PEYSAKHOV

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

4 K/ 4

I r i-

Struct = > O.Sp ->5:1 Aspect Ratio Grid acceptance: V= Positive diffracbon pattern properties conforming to *5°% undissolved fiter, overlapped or folded Totals laboratoty identification criteria observed <10% parficulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 'Z: EDS spectrum conforming to laboratoty boles 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-Asbeslos Tremolite M = Matrix - Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470416

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176495