TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client N:i: NYC BOE Volume (liters): 1928 Lab G 5970 Filter Tvoe ' Filter Area: MCE 385 mm- LabSam n 6 Grid Opening Size: 0.01124

Client Still .JA 6 Area Examined: 0.04496 mm-

GRID BO Magnification: 20,000 GRID ID; / Accelerating Voltage: 100 KeV # Grid Opcirings: 4 Analysis Dare: 11/25/01

/9 Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Struciure N or 0 EDS No (Nonadb F B I C M >=05 p I > = 5u Chrys Amphibole : Nonasb Amrag/ND No Conn.; <5u I Eiements)

f-------- ■ ------- h------- f

/A

Struct = -l)..- i, 5:1 Aspect Ratio Grid acceptance: 9= Positive oitfr.r r pattern properties conforming to <50% undissolved {liter, overlapped or folded Totals laboratory ideniit cion criteria cbseived <10% particulate coverage >50% coverage ate

9= EDS specirui identfication ent; - ;..uforming to laboratory ouserved leas; 20 unfolded or overlapped grid squares <5% holes or opaque areas ______ LI B j C M Chrysotile I >5u

AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle; <3 li! -1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 t ■ sections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD= No Struc! . .Detected

CONFIDENTIAL, CITY_21MC100_003458393 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179179