TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEMAsbejtos(air)CountS^ Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7347 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/6/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure \ or 7 EDS (Nonadb No F B C M >=05 u ;>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

Struct = > 0 5p > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to "50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification critena observed least 20 unfolded or ovedapped grid squares <5% I F ! B C ; M I >5u 7= EDS spectrum conforming to laboratory holes or opaque areas ----- '------- 1------- identification criteria observed Chrysotile I AMPHtDOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter aoan Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbeslos Tremolite M = Matrix Actinolite Non-Identified i NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470877 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176798