TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Coamt Sheet Client Name: NYC BOE Volume (liters): !792 Lab Group 7407 £ill£LjYEe/jjlter Area^ MCE 385 mm= Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 403/02

Analysis Periormed By: _________ ESj!______ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Strucwe N or v ECS (Nonadb No F B C M >=05 p >=51J Chrys Amphibole Nonasb AmbigyND , No Coord Elements) <5p

_JL__ -U__ d—

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ^= Positive diffracbon pattern properbes conforming to un^ssolved filter, overiapped or folded Totals laboratory identification criteria observed 1,^ A • 1/4 A AA <10% parbculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >6m '/= EDS spectrum conforming to laboratory holes or opaque areas identilicabon criteria observed Chrysotile I AMPHIBOLY Amphibole F = Single Fiber Amosite | B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos j Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_009505439 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178912