NYC-WTC_000226756

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet i Client Name: NYC BOE Volume (liters): I 840 Lab Group #: 6832 Filter Type / Filter .Area: MCE 3 85 nm Lab Sample #: 15 Grid Opening Size; 0.01 i

Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Y/ -7 Magnification; 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/26/02

.Analysis Performed By: ROMAN PEYSAKHOV

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

37^

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: 7= 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 B C M >5rj EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002923023

NYC-WTC_000226770