NYC-WTC_000193417

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC: BOE Volume (liters): 1808 Lab Group #: 8266 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or A EDS (Nonadb i No F B C M >=05 p '=5(j Chrys Amphibole Nonasb Ambig/ND Elemens) j No Coord <5p i

s

Struct = > 0.5p > 5:l .Aspect Ratio Grid acceptance; ^'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5p V= 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 Actinolite ■ Non-Identified NSD = No Structures Detected

CITY_21MC100_003094638

NYC-WTC_000193417