TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7503 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/22/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F 8 C M >=05 p Chrys Amphibole Nonasb Ambig/ND Coord <5p Elements)

wy 7

140=3 1 7 // /L

7^:5

Struct = > 0 5u > 5:1 Aspect Ratio Grid acceptance:

\ = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Tpt^ laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% 1 I F j B i C ! M p5p EDS spectrum conforming to laboratory holes or opaque areas ). identification criteria obseived Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos j T Tremolite M = Matrix i Non-Identified j | Actinolite NSD = No Structures Detectec

CONFIDENTIAL, CITY_21MC100_003471227 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_OO0177035