NYC-WTC_000226610

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6685 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID; Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/15/02

Analysis Performed By: ROMAN PEYSAKHOV

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

(f

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: 9= 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 >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AM~PHIBOL.ES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 finer diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002922765

NYC-WTC_000226620