TEM grid analysis record, Sample 11, P.S. 89M, May 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE yolume (liters): 1840 Lab Group #: 7597 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 11 Grid Opening She: 0,01124

Client Sample #: 11 Area Examined: 0.04496 mm’

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

Analysis Performed By: //7

ROMAN PEYSAKHOV,

GO. Structure Structure Type Length ID of structure N or V EDS (Nonadb No F B C M >=05 M Chrys Amphibole Nor.asb Ambig/ND <Sp Elements)

ZJZ cl

Struct = > O.Sp >5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties confomting to <50% undissolved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5m a/- 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 apart Crocidolite Ambiguous C = Cluster (>3 intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389912 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178519