TEM air sample results, 125 Liberty St, Oct 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 3600 Lab Group #: 9035 Filter Type / Filter Area: MCE 385 mm2 •

Lab Sample #: 36 Grid Opening Size: 0.01124 Client Sample #: 36 Area Examined: 0.24728 mm2 GRID BOX: /t/i T Magnification: 20,000 GRID ID: - Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/29/02

Analysis Performed By: ?<(P ROMAN PEYSAKHOV

• GO. Structure Structure Type Length 10 of Structure Nor EDS No Nonasb AmbigIND (Nonadb F B C M >=05 N >=5p ChryS Amphibole • No Coord <5P Elements) !; -3 Z 7-- t'/ Z- 4

-,r Z !/ j tr • ' /i 1 ,i

i

r z -z HG Z t'

t& 2 t 2 2 N'

j I i A Photo No.(from 1 n 5 asbestos contaimna samo es pro acz:eprance:

Strad = > 0.5N > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals v = Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F ; B C M >5µ holes or opaque areas v= EDS spectrum conforming to laboratory Chrysotile identification criteria observed AMPHIBOLES Amphibole. F = Single Fiber Amosite 5 = Bundle (<3 fibers <1 fiber diameter apart Crocidoiite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I Tremolite M=Matrix Non-Identified Actinolite NSD = No Structures Detected

NYC-WTC 000131702