TEM Asbestos air sample results, NYC BOE, Apr 28 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7558 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm^ GRID BOX: {079 Magnification: 20,000 GRIDID: 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 Norv EDS (Nonadb No F B C M >=05 M Chrys Amphibole Nonasb Ambtg/ND No Coord <5p Elements)

A V 3^'j-C 14 U-

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: x/= Positive diffraction pattern properties conforming to <60% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% parSculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C EDS spectrum conforming to laboratory M >5p holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3471325 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177104