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'): 1880 Lab Group #: 7278 Filter Type / Filter Area: MCE 385 Lab Sample #: 5 . Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm" GRID BOX: Mannificatinn: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: # ROMAI^EYSAKHOV

GO. Structure Structure Type Length ID of Structure N or > EDS No (Nonadb F B C M >=05 p :>=5iJ Chrys Amphibole Nonasb Ambig/ND

^0 No Coord <5m Elements)

d /r----

Struct = > 0.5p -> 5:1 Aspect Ratio Grid acceptance; 'i= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulste coverage >50% coverage ate least 20 unfolded oroveilapped grid squares <5% F B C M >5u 'J- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ! Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite I NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470671 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176654