NYC-WTC_000207135

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Voltiine (liters'): 1920 Lab Group #: 7851 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 20 Grill Opening Size; 0.01124 Client Sample #: 20 .Area Examined: 0.04496 mm^

GRID BOX: ■Ml vilification: 20,000 GRID ID: Aceeleratiiijr Voltage: too KeV # Grid Openings: 4 Amiivsis Date: 5/25/02

Analysis Performed By: MARKPEYSAKHOV

, GO. Structure Structure Type Length ID of Structure Nory EDS (Nonadb No F B C M >=05 p :>=5m Chrys Amphi Nonasb Ambig/ND -.. N9,i„,Coprd <5p ; Elements)

-.-I-

p

■ V

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: >/: Positivediffraction pattern properties conforming to, <50% undissoNed filter, overlapped or folded laboratory identification criteria observed , <10% paiticulale coverage >50% coverage ate - least 20 unfolded or overlapped grid squares <5% F B C M. >5p •7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed .'.lile rAMPHlBOLES : F = Single Fiber Amosite mils. B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) i Anthophyllite Nor- cstos Tremolite M = Matrix Actinolite NSD = No Structures Detected

CITY_21MC100_003014676

NYC-WTC_000207135