NYC-WTC_000229961

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters'): 1936 Lab Group #: 7122 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size: 0.01124 Area Examined: 0.04496 mm^

feu Client Sample #: GRID BOX: Magnification: 20 000 GRIP ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/18/02

Analysis Performed By: ROMAN PEYSAKHOV

i GO. Structure Structure Type Length ID of Structure N or 7 EDS I---- i---------- No F B C M >=5p (Nonadb . 'No ' Coord >=05 (J Chrys Amphibole Nonasb Ambig/ND Elements) ■ <5m

77^ u // 4

i__________ _____________ L_. Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: v/= Posifive diffraction pattern progenies conforming to <50% undissohred 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 >5p V= 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 - Actinolite Non-Identified NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388540

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229961