TEM Asbestos air sample results, WC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1944 Lab Group #: 6197 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/24/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 u >=5)j Chrys Amphibole Nonasb Ambig/ND No Coord <6u Etements)

Struct = > 0.5p > 5:i Aspect Ratio Grid acceptance: v= Positive diffraction pattern properties contormlng to <50% undissolved filter, ovedapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or ovedapped grid squares <5% F B I C M =■5^ >/= 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 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected ............ 1

CITY_21MC1OO_OO31O5O83

NYC-WTC_000184417