NYC-WTC_000201227

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters'): 1840 Lab Group #: 7291 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 ' GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: OP f\/______ _____ _ ROMAN PEYSAKHOV.

GO. Structure S:ructure Type Length ID of Structure N or '/ ■ EDS 1. (Noradb No r B C M If p ■=51J Chrys Amohibole Nonasb Ambig/ND i No Coord <5p Elements)

■7 IL ■ u- 5

i

■I

Struct = > 0.5|u_> 5:1 Aspect Ratio Grid acceptance: >'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory ider.tr'ication criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% ■p B C M >5p 0= EDS spect'urr, conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOI.RS 1 Amphibole F - Single -iber Amosite : B = Bundle (<3 libers <1 fiber diameter apart Crocidolite ; Ambiguous C = Cluste' (>3 intersections) Anthophyllite Non-Asbestos Tremolite ' M = Matrix Non-Identified Actinolite I NSD = No Structures Detected

CITY_21MC100_011275488

NYC-WTC_000201227