NYC-WTC_000217895

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE V olume (liters): 1936 Lab Group #: 6645 Filter Type ' Filter Area. MCE 3S5 mnr Lab Sample #: ]5 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 rr.m-

GRID BOX: Magnification: 20,000 GRID ID: -? -r Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 24 2/02

Analysis Performed By: MARK PEYSAKHOV

GO^ Structure Structure Type Length IC of Structure N or v ] EDS 1 ——T,,.—iNonaOb i No F B C M >=05 p >=5|j Chrys Amphibole ] Nonasb Amoc/ND ' No Coord <5p I Elements) j

a ? ;<3

Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance: ■i- Positive diffraction pattern properties confonning 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% ! F i B I C i M i >5E EDS spectrum conforming to laboratory holes or opaque areas denlification criteria observed ' AMPHIBOLES Chrysotile j 1 i ! Amphibole i F = Single Fiber Amosite Crocidolite Ambiguous I i ; B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections] Antfiopriyilite Non-Asbestos | T remolite M - Matrix Actinolite Non-Ideniined I NSD = No Structures Defected

CITY_21MC100_002878027

NYC-WTC_000217895