TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6151 Filter Tvpe / Filter Area: MCE 385 mm* Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mm*

GRID BOX: Ma2nification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/20/01

Analysis Performed By: MARK PEYSAKHOV

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

..... I - I

"j H ~ Struct = > 0.5u .> 5; 1 Aspect Ratio Grid acceptance: N= Positive diffracfion pattern properties conforming to <50% undissolved filter, overlapped or folded T otals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j h'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES j Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameier apart Crocidolite Ambiguous C - Cluster (>3 intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite ' Non-Identified NSD = No Structures Detected L

CITY_21MC100_003104928

NYC-WTC_000184302