NYC-WTC_000190387

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7296 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 13 Grid Opening Size: 0 01124

Client Sample #: 13 Area Examined: 0.04496 mm^

GRID BOX; Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length 10 of structure N or V EDS (Nonadb No F B C M >=05 p >=5|J Clirys Amphibole Nonasb Atnbig/ND ’ No Coord <5p Elements)

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: 'J = Positive diffraction pattern properties confomiing to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

'J- EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B c M >5p 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 ntersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003089282

NYC-WTC_000190387