TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (litersl: 1840 Lab Group #: 7406 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm" GRID BOX: Magnification: 20,000 GRID ID: £2^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/15/02

Analysis Performed By: X7

ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Norv EDS (Nonadb No F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

5^ IK n //

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

7 = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laborator/ identification criteria observed <10% particuiate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C i M >5u v= EDS spectrum conforming to laboratory holes or opaque areas Identification cnteria observed Chrysotile 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 Non-Identified Actinolite NSD = No Structures Detectec I i

CONFIDENTIAL, CITY_21MC100_003471061 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176920