TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6645 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/12/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v' EDS No (Nonadb F B C M >=06 p :>=5pi Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

II’ Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: 'I- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >60% coverage ate least 20 unfolded or overlapped grid squares <5% B C s M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clnysotile am:phiboles~~! Amphibole F = Single Fiber Amosite I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467879 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181028