NYC-WTC_000212431

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet (?lient Name: NYC BOE Volume (liters): 1928 Lab Group #: 7398 Filter Type / Filter Area: MCE 385 mm^ Lab Sample#: Grid Opening Size: 0.01124 (?lient Sample #: 02 Area Examined: 0.04496 mm^

(;RID BOX: Magnification: 20,000 GRID ID: 7W’ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/13/02

Analysis Performed By: ROMAN PEYSAKHOV

Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

“V

Struct = > 0.5u 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals InOoratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or oveilapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas klentificabon criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber ciaineter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite i Non-Asbestos Tremolite ! M = Matrix Non-ldentified Actinolite ' MSD = No Structures Detected

CITY_21MC100_002866524

NYC-WTC_000212431