NYC-WTC_000207639

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8263 Filter Type / Filter Area: MCE. '385 mm2 Lab Sample #: :2 ‘ Grid Opening Size: 0.01124' Client Sample #: 2 Area Examined: 0.04496 mm2 .

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 Norv .'EDS . No . ■ (Nonadb F B C M >=05 u >=5|j Chrys Amphibole ' Nonasb Ambig/ND

a zzszziw No Coord <5m Elements)

4 £

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

CITY_21MC100_003015544

NYC-WTC_000207639