TEM Asbestos air sample count sheet, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEMAsbe£tos(airlCountSheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7534 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area E.xamined: 0.04496 mm^

GRIP BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/25/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length IDofStructure Norv EDS (Nonadb No F B C ■=05p “ =5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) i

J A

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

y = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory icentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% B I C I M i >5p v= EDS spectrum conforming to laboratory holes or opaque areas _______P identification criteria observed Chrysotile A.MPHIBOLES .Amphibole F = Single Fiber Amosite B = Bundle <3 fibers <1 fiber diameter acart Crocidolite Ambiguous C = Cluster :>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix ' Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003471277 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177068