TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NV'C BOE Volume (liters): 1928 Lab Group #: 8240 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 8 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. I Structure Structure Type Length ID of Structure Norv EDS 1 No (Nonadb F B C M >=05 p ~T Chrys Amphibole Nonasb Ambig/ND No Coord : <5p Elements)

I <1-

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffracbon pattern properbes conforming to "50% undissolved filter, overiapped 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 >5m >/= EDS spectrum conforming to laboratory holes or opaque areas idenbfication criteria observed Chrysotile i AMPHIBOLES ! Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite ; M = Matrix Non-Identified Actinolite ■ NSD = No Structures Detected

CITY_21MC100_003105922

NYC-WTC_000185018