TEM grid analysis record, Sample 1, P.S. 89M, May 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niter si: 1840 Lab Group #: 7597 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 01 Area Examined: 0.04496 mm"

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

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length lb of structure N or n/ EDS (Nonadb No F B C M >==05 M >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

_JL

2^ Z

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to '’*ef*9PP®4 or folded Totals laboratory iOentification criteria obsenred I'ShrtratArt/ imritan^ <10% particulate coverage >50% coverage ate least 20 unfolded orovetlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory httles or opaque areas Identification criteria 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-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389902 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178510