TEM asbestos analysis data sheet, Sep 2002

NYC 9/11 Public Portal Document

TEMAsbesfosfairlCountSh^ Client Name: NYC BOE Volume (liters): 1920 Lab Group 8828 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area E.vamined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

Analysis Performed By: MARKPEYSAKHOV

. - ■ GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C >=05 u Chrys Amphibole Nonasb Ambig/ND ■ No Coord <5u Elements) )

<- < rl

Struct = > 0,5p > 5:1 Aspect Ratio Grid acceptance:

\'= Positive diffraction pattern properties conforming to <50% undissolved (liter, overlapped or (owed Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chi-ysotile , AMPHIBOLES Amphibole F ri Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSE = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003422047 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175304