TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEMAsbestos/airlCount Sheet Client Name: NYC BOE Volume niters): 1800 Lab Group #: 7248 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/28/02

Analysis Performed By: MARKPEYSAKHOV

: GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B 0 M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND • No . Coord <5u Elements)

' I — 3 CTe? ----

Struct = > O.Sp >5:1 Aspect Ratio Grid acceptance; Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals laboratory identificaSon___ observed<10% paitculate coverage >50% coverage ate .1.______ criteria least 20 unfolded or overlapped grid squares <5% F B C M EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile Famphiboles Amphibole F = Single Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ! Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03470639 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176638