TEM asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7182 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 ! GRID ID: Accelerating Voltage: 100 KeV [ # Grid Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: ROMAN PEYSAKHOV

_ GO. __ ---Structure Structure Type Length ___ ID of Stnjcture N or EDS No {Nonadb F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND ,___.No Coord <5p Elements)

€'1 r A2- 20^ /y

~77

Struct = > 0.5)u > 5:1 Aspect Ratio Grid acceptance: 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 overlapped grid squares <5% F B C M >5u y= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed - Chrysotile AMPHIBOLES Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersectionsj Anthophyllite | Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected _..

CONFIDENTIAL, CITY_21MC100_003468705 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181606