NYC-WTC_000229902

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 8038 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/10/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure Nor EDS No (Nonadb F B C M >=05 u >=5(J Ctirys Amphibole Nonasb AmbigMO <5p Elements)

2^ ■ H /S-------

Struct = > 0.5 p _> 5:1 Aspect Ratio Grid acceptance: A- Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Tot^ laboratory identification criteria observed <10% partieulafe coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p '/= 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_003388470 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229902