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: MCE 385 mm^ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0,0449b mm-

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

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor V ECS No (Nonadb F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND Elements) i No Coord <5u

3

Struct = > 0 5p :> 5:1 Aspect Ratio Grid acceptance: \ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folaed Totiils laboratory identification criteria obser/ed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M j >5tj ■■1= EDS spectrum conforming to laooratory holes or opaque areas identification criteria observed Chrysotile amphiboles 4-- - Amphibole F = Single Fiber Amosite ------- j. 0 = auntie ;<3 fibers <i fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite Non-.Asbestos Tremolite M ■ Mat'ix Non-Identified Actinolite NSu = No Sluctuies Detected

CONFIDENTIAL, CITY_21MC100_003386267 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229932