TEM Asbestos air sample results, NYC BOE, Jan 24 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6416 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or EDS (Nonadb No F B C M >=C5 p >=5|j Ctirys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

ZZZK A EZEZZ /I

cP ------

Struct = > O.Sp >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filler, 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 >5p EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile AMPHIBOLES j Amphibole F = Single Fiber Amosite ) B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) , Anthophyllite i Non-Asbestos Tremolite i M = Matrix Actinolite i Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003433550 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175830