TEM asbestos analysis data sheet, January 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6302 Filter Type / Filter Area: MCE 385 mm-^ Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/11/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: y = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5m ■7= EDS spectrum conforming to laboratory holes or opaque areas icentification criteria observed Chrysotile ■ AMPHIBOLES ; Amphibole F = Single Fiber I Amosite B = Bundle {<3 fibers <1 liber diameter apart i Crocidolite Ambiguous - C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos Tremolite , M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_001946408 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 NYC-WTC_000178801