NYC-WTC_000229912

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 8038 Filter Type / Filter Area: MCE 385 Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date; 6/10/02

Analysis Performed By: ROMAN PEYSAKHOV

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

2E

Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance: •^= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identificabon criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j ^= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ! Anttiophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified i Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388482 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229912