TEM Asbestos air sample data sheet, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Grouii #: 7283 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 nim^

GRID BOX: Magnification: 20,000 GRID ID. Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = ■ ■ 5:1 Aspect Ratio GriO acceptance: .

Positive I t-3 ion pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identif'. rtion criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% B C M >5(4 'i- EDS specti o; conforming to laboratory ' F holes or opaque areas identification crite a observed Chrysotile ' AMPHIBOLES Amphibole | F : Single Fiber Amosite S = Bundle i<3 fir .rs <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster i>3 in ersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified ; Actinolite NSD = No Siructu es Detected

CONFIDENTIAL, CITY_21MC1OO_OO3467254 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180626