NYC-WTC_000229930

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6699 Filter Type / Filter Area: •VICE 385 mm- Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/16/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No fNonadb F B C M >=05 p Chrys Amphibole Nonasb | Ambig/ND No Coord <5p Elements)

C------

Struct = :> 0 5p > 51 Aspect Ratio Grid acceptance:

V= Positive ciffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory dentilication critena observed <10% particulate coverage >50% coverage ate

EDS soedrum conforming to aboratory ieasi 20 unfolded or ovedapped gnd squares <5% holes or opaque areas F B I C I M ; >5p dentification ytena observed Chrysotile AMPHIBOLES Amphibole F = Single Eder Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster !>3 intersections) Anthophyllite Non-Asbestos Tremolite M < Manx Non-Identified Actinolite NSD = Vo Slruclures Detected I I

CONFIDENTIAL, CITY_21MC100_003386269 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229934