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): 1824 Lab Group #: 7111 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 21 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 3/17/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 u i ■=5p Chrys Amohibole Nonasb Ambig/ND No Coord <5|j Elements)

4- o-zT

Struct = > 0.5p >5:1 Aspect Ratio Gnd acceptance: A- 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 j B C M >5|j y = EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile ) ■A.VIPHIBOLES 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 j Non-Identified Actinolite I________ _ . ___ NSD = No Structures Detected

CITY_21MC100_003102616

NYC-WTC_000183435