TEM grid analysis record, Sample 6, P.S. 89M, May 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1848 Lab Group #: 7597 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #; 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm^

GRID BOX: GRIDID: Mr Magnification: Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 Analysis Date: 5/1/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or < EDS (Nonadb No F B C M i>=5m Chrys Amphibole Nonasb Ambig/NO Elements) <5m

14 A

(0

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% u^di3so^ed filter, overlapped or folded Totals laboratory identification criteria observed <10% parlicijlate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u /= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B - Bundle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Idcntified NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389907 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178515