Cover page for TEM results and chain of custody, 110

NYC 9/11 Public Portal Document

I 'ITEM Asbestos (air) Count Sheet

I Client Name: Lab Group #: Airtek 6120 Volume (liters): 1300 Filter Type / Filter Area: MCE 385 mm2 Lab Sample #: 11 Grid Opening Size: 0.01124

I Client Sample #: 21 ( ( t/ Area Examined: Magnification: 20,000 0.06744 mm2

GRID BOX:

I GRID ID: # Grid Openings: 6 C /C/4 Accelerating Voltage: 100 KeV Analysis Date: 12/16/01

I Analysis Performed By: ROMAN PEYSAKHOV

I No GO. Coord Structure No Structure Type F B C N >=05 u Length >=51t Chrys ID of Structure Amphibole Nonasb N or Ambig/ND EDS (Nonadb Elements) <5v

z- L

L T 1(

bkZ If

I I I I I 1 I Struct = > 0.5µ .> 5:1 Aspect Ratio 4= Positive diffraction pattern properties conforming to Grid acceptance: <50% undissolved filter, overlapped or folded <10% particulate coverage >50% coverage ate Totals laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M I >Su I i= EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas

AMPHIBOLES Chrysotile Amphibole F = Single Fiber Amosite

I 6 = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Crocidolite Anthophyllite Tremolite Ambiguous Non-Asbestos M = Matrix Actinolite Non-identified NSD = No Structures Detected

NYC-WTC 000098494