Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: Airtek Volume (liters): 1300 Lab Group #: 6115 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.06744 mm2

GRID BOX: Ci C / Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 6 Analysis Date: 12/15/01

Analysis Performed By: ____`~~ J —~"'' MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor EDS (Nonadb No F B C M >=05 N >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5N Elements)

- C-- ____ ____ ____ ____ ____ ____ ____

I .

I I I

7 I gMIM => n_ S u > 5.1 Aspect Ratio Grid acceptance: I d= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded "Totals identification criteria observed <10% particulate coverage >50% coverage ate laboratory least 20 unfolded or overlapped grid squares <5% F B C M >5i~ d= EDS spectrum conforming to laboratory holes or opaque areas I identification criteria observed Chrysotile 1 AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified NSD = No Structures Detected I NYC-WTC 000098461