NYC-WTC_000193209

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 8053 Filter Type / Filter .Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: J Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/11/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

3" ’ z

Struct = >0.5p >5:1 .Aspect Ratio Grid acceptance: Positive diffraction pattern propert.es conforming to <50% undissolved filter, overlapped or folded Totals latoratory identification criteria obsenied <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% !■ B C M >5u y'- EDS spectrum conforming to laborator)' holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibeis <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_003094319

NYC-WTC_000193209