NYC-WTC_000230384

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 7204 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: - 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

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

tf a T(

Struct = > 0.5n _> 5:1 Aspect Ratio • Grid acceptance: ■ '</= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsen/ed <10% particulate coverage >50% coverage ate

'i- EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M >5p

identification criteria observed Chrysotile i 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 Non-Identified Actinolite ■NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3389187 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230384