NYC-WTC_000230353

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6687 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000. GRID ID: AcceleratingVoltage : 100 KeV # Grid Openings: 4 Analysis Date: 2/15/02

Analysis Performed By: ROMAN PEYSAKHOV

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

i/ If 1 -

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ^y= Positive diffraction pattern properdes 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 conlorming to laboratory holes or opaque areas identitication criteria observed Chrysotile AMPHIBOLES Amphibole r = Single Fiber ■ Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389109 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230353