NYC-WTC_000227972

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6853 Filter Tvpe / Filter .Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 07 -Area Examined: 0,04496 mm-

GRIP BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV Analysis Date: 2/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS i No. (Nonadb F B C M >=05 p >=5iJ Chrys Amphibole Nonasb AmOig/ND No Coord <5m Elements)

y V . xo —

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: y/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% partiajiate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C I M EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles" Amphibole F = Single Fiber Amosite Crocidolite -Ambiguous B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Actinolite Non-Identified I NSD = No Structures Detected

CITY_21MC100_002899542

NYC-WTC_000227972