TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client iNamc: NYC BOE Volume (liters): 1805 Lab Group #: 7406 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 'Z EDS : No >=0^0 : (Nonadb ■ F B C M Chrys Amphibole Nonasb Ambig/ND

s No Coord <5m Elements) i 7“

u ~7r

Struct = > 0.5p >5:1 Aspect Ratto Grid acceptance: 'J- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped orfolded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% V= EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas Chrysotile F B sizleze 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 i Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471071 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176930