NYC-WTC_000218312

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE \ oluine (liiers): ] 920 Lab Group #: 6940 Filter Type Filter Area: MCE JS? mm- Lab Sample #: 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,00u GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3 ■•'5/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID ol Structure N or 4 No iNonadt F 3 C M >=05 p : '=5p Chrys Amphibole j Nonasb Ambig/ND NIo Coord <5p EiBTierits;

3^

I

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: •/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% r I F I B ■ C ‘ M 4= EDS spectrum conforming to laboratory holes or opaque areas ----------------- ■------- 1------- i____ : idertification criteria observed Chrysotile I ) : AMPHIBOLES Amphibole ' F - Single Fiber Aimosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous ! C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Actinolite No)i-!dent)fjed ; NSD - No Structures Detected

CITY_2IMCl0 0_0 0 0 4 6 6 2 7 9 NYC-WTC_000218312