NYC-WTC_000178972

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 7987 Filter Type/FUter Area: MCE 385 Lal) Sample #; 9 Grid Opening Size; 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date; 6/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Sfructure Structure Type Length ID of structure N or V EDS No Nonasb (Nonadb F B C M >=05 y >=5p Chrys Amphibole Ambig/ND iNo’ Coord <5m Elements)

f-

Struct »> 0.5|a > 5:1 Aspect Ratio Grid acceptance; V= Positive diffraction pattern propertlas conforming to <5^ undtesolved filter, overtap^ or folded Tot^ labotalor/ identifieation entena obiawed <10% parJculate 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 identificatton 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 = Matra ‘ Non-Identified Actinolite NSO = No Stnjctures Detected

CONFIDENTIAL, CITY_21MC100_0 03456511 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178980