NYC-WTC_000230363

NYC 9/11 Public Portal Document

'Sv TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6766 Filter Type / Filter Area: MCE 385 Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/21/02

Analysis Performed By; MARKPEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No {Nonadb F B C M =5j Chrys Amphibole Nonasb Ambig/ND No ■ Coord <5|J Elements)

___ _ <3 4

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 observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u 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 Noir-Asbestos M - Matrix Tremolite Actinolite Non-Identified NSb = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389133 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230363