NYC-WTC_000230284

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE ’ Volume (liters'): 1928 Lab Group #: 6599 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: loo KeV # Grid Openings: 4 Analysis Date: 2/8/02

Analysis Performed By: ROMAN PEYSAKHOV

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

ff___ //_____

Struct = > 0.5g _> 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 n/= 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 Non-Identified Actinolite NSD ’ No Structures Detected ■

CONFIDENTIAL, CITY_21MC100_003389019 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230284