TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5986 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 21 Grid Opening Si2e: 0.01124

Client Sample #: Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIPED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/29/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of structure Nor 9 EDS Ng (Nonadb । F B C M >=5m Chrys Amphibole Nonasb Ambig/ND No Coord <;u Elements)

/ ^2- g (^IS r ‘I 78

___ Struct = > 0.5u A 5:! 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 BfC M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole I F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Nan-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458514 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179244