NYC-WTC_000230314

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1928 Lab Group #: 6621 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openinas: 4 Analysis Date: 2/10/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EOS No . (Nonadb F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND ' No ^oord <5p Elements)

S/Vr^ K

Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance: •J- 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 '/'= EDS spectrum conforming to laboratory holes or opaque areas ■ 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_21MC100_003389043 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230314