TEM Asbestos Air Sample Results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6929 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 GridOpeiiingSi^ 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: GRID ID: -M?, Maijiiification: Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 Analysis Date: 3/5/02

Analysis Performed By: ROMAN PEYSAKHOV

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

____ Igai Cl i

Cl ■i

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% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u y = EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chry.soiile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-ldeiiTiTicd| NSD = No Structures Detected

CITY_21MC100_003108480

NYC-WTC_000185798