NYC-WTC_000219700

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume niters): 1832 Lab Group #; 7134 Filter Type / Filter Area; MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #; 10 Area Examined; 0.04496 mm^

GRID BOX; Magnification: 20,000 GRID ID; Accelerating Voltage; 100 KeV # Grid Openings; 4 Analysis Date; 3/19/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nofiadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb AnWND No Coord <5p Elements)

~z J?

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: A- Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5p >/= 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 Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_000468111 NYC-WTC_000219700