TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8759 Filter Type/Filter Area: MCE 385 mm" Lab Sample #: 16 Grid Opening Size: 0 01124 Client Sample #: 16 Area Examined: 0 04496 mm^ GRID BOX: /5:7O Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalysisDatc: 8/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO structure Structure Type Length 1 ID of Structure N or 7 EDS (Nonadb No F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

r£ K 1 f

Sti uct = > 0 5|J >51 Aspect Ratio Grid acceptance Positive diffraction pattern properties conforming to <50% undissolved filter overlapped or folded Totals laboratory identification critena observed <10% parbculate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5u 4= EDS spectrum conforming to laboratory holes or opaque areas Identification cntena observed Chrysotile j AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart \ Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I remolite M = Matrix Non-Identified Acbnolite NSD.= No Structures Detected

CONFIDENTIAL, CITy_21MC100_003431234

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175492