TEM Asbestos air sample results, NYC BOE, Jan 26 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client ■ mile: NYC BOE Volume (liters): 1840 Lab <.!■ :ii|) #: 6455 Filter Type / Filter Area: MCE 385 mm^ Lab Sai'.I plc #: 13 Grid Opening Size: 0.01124

Client ample #: 13 Area Examined: 0.04496 mm-

GRID BOX: M^iiification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid < jpeiiiiigs: 4 AnuA sisDute: 1/26/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure 1 Structure Type Length ID q: L: ., ,:ure N or y EDS No I F Chr^S ! Amphibole Nonasb (Nonadb B C M 5F ' >=5|J Ambig/ND No ■!. . ..1,1 Elements)

-3-

Struct ■ J > 5:1 Aspect Ratio Grid acceptance: •J- Positive ■'I't'-action pattern properties conforming to <50% undissotved litter overlapped or folded Totals laboratory ic tification criteria observed <10% particulate coverage >50% coverage ate

V=ED£3p- ."d.'ii conforming to laboratory least 20 uniolded or overlapped grid squares <5% holes or opaque areas er B c M >5u identificaiioi : ten.? observec Clif. lOtile i AMPHIBOLES Ampiiibole F = Single - :.-r Amosite Ambiguous B = Bundle ■libers <1 fiber diameter apart Crocidolite C = Cluster ■: Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-klen rifled Actinolite NSD = No Struaures Detecteo

CONFIDENTIAL, CITY_21MC100_003433569 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175832