NYC-WTC_000223891

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7799 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRIP BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/19/02

Analysis Performed By: MARK PEYSAKHOV

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

ZZ^SZ s-

a

Struct = >0,5p > 5:1 Aspect Ratto Grid acceptance: A- Positive diffraction pattern properties conlorming to <50% undissolved filler, ovedapped or folded Tot^ laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped gnd squares <5% F B C M ( >5tJ y/- EDS spectrum conforming to laboratory holes or opaque areas identification critena observed

F = Single Fiber AMPHIBOLES Amosite Chrysotile Amphibole zU 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Idcntified Actinolite NSD = No Structures Detected

CITY_21MC100_002920110

NYC-WTC_000223891