TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7534 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: J Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/25/02

.Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Stnicture N or 7 i EDS No F B c M >=05 u >=5(j Chrys Amphibole Nonasb eZs) No Coord <5m

--------------1—----- ---------- □ YY-7 —

r Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance:

\= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B I C VI I >5u 7= EDS spectrum conforming to laboratory holes or opaque areas \ L I F identification criteria observed i Chrysotile [ A.MPHIBOLES Amphibole j F = Single Fiber Amosite a = Bundle (<3 fibers <1 Ober diameter apart Crocidolite , Ambiguous C = Cluster i>3 intersecticnsl M = Matrix Anthophyllite Tremolite Actinolite i \on-Asbestos Non-Identified n NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003471276 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177067