NYC-WTC_000230401

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1944 Lab Group #: 7216 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 8 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/26/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or n/ EDS No (Nonadb F B C M >=05 u Chrys Amphibole Nonasb' Ambig/ND No Coord <5|J Elements)

a- J.

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properbes 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 M >5u </= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observec 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 Actinolite Non-Identified NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_002723181 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230401