TEM asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1920 Lab Group #: 7558 Filter Type / Filter Area: MCE 385 Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 05 Area E.xamined: 0.04496 mm-

GRID BOX: lOJfL Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS I

/^0 No Coord 77^ No F B C M >=05 tJ <5m Chrys Amphibole Nonasb Ambig/ND (Nonadb Elements) I

if T gS -JC__ iSS: ____

Struct = > 0.5p > 5;1 Aspect Ratio Grid acceptance; \= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laborator/ identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C ' M j >5p y = EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenvec ■AMPHIBOLES Chrysotile n i Amphibole i F = Single Fiber Amosite Ambiguous ------- i— B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detectec

CONFIDENTIAL, CITY_21MC100_003471316 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177095