TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1880 Lab Group #: 7278 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0,04496 GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 p ~ >=5p Chrys Amphibole Nonasb Ambig/ND ' No Coord <5p Elements)

i

Struct = > 0.5g ,> 5; 1 Aspect Ratio Grid acceptance; ’Z = 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 ■<1= EDS spectrum conforming to laboratory holes or opaque areas identffication 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 Tremolite M = Matrix Non-Identified Actinolite NSO = No Stnjctures Detected

CONFIDENTIAL, CITY_21MC100_003470738 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176703