NYC-WTC_000199296

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8809 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/5/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p I Ctirys Amphibole Nonasb Ambig/ND .No Coord <5u I Elements)

3 J ri ■

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conformirg to <50% undissolved filter, overlapped or tolded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed leasi 20 unfolded or overlapped grid squares <5% F B C M >5u 4= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Siiigle Fiber Amosite B = Bundle {<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite -NSD = No Structures Detected

CITY_21MC100_003049012

NYC-WTC_000199299