TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 6408 Filter Tvpe / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm*

GRID BOX: fs-y'tg? Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARK PEYSAKHOV

GO, I Structure Structure Type Length ID of Structure N or EDS i (Nonadb ! No F B C >=05 p :>=5|J Chrys Amphibole Nonasb Amhig/ND No Coord <5p Elements) j ---------------- 1

J cg>

s 1

Struct = > 0.5p >5:1 Aspect Ratio n Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5u ^/= EDS spectrum conforming to laboratory holes 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-Asbestos ! Tremolite M = Matrix Non-Identified NSD = No Structures Detected Actinolite i

CONFIDENTIAL, CITY_21MC100_003467468 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180746