NYC-WTC_000220772

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7354 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/8/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or A EOS (Nonadb No F B C M >=05 p >=5p Chrys Amphitwte Nonasb Ambig/ND No Coord <5p Elements)

a ------

■1

A .J

Struct = ^0 5p >5:1 Aspect Ratio Grid acceptance: >= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% ! F El C M >5tJ ■J = EDS spectrum conforming :o laboratory holes or opaque areas Identification criteria obser/ec Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle '<3 fibers <1 Fioer diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSC = No Structures Detected

CITY_21MC:i00_000621704 NYC-WTC_000220772