NYC-WTC_000229013

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7826 Filter Type / Filter Area; MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01 i 24 Client Sample #: 08 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID IP: Accelerating Voltage; too KeV # Grid Openings: 4 Analysis Date: 5/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure N or y EOS I No (Nonadb 1 F B C M >=OS|J >=5p Chrys Amphibole Nonasb Amisg/ND Elements) [ No Coord <5m ----------- 1 -------- i

J 1

Struct = >0.5p > 5:1 Aspect Ratio Grid acceptance: i/= Positive diffraction pattern properties conforming to <50% undissolved fitter, overlapped or folded Totals <10% parSoilBte coverage >50% coverage ate la&oratory idenftaPm criteria observed least 20 jnfcUed or overlapped grid squares <5% F B C M i >5u 'i= EOSspearum conforming to laboratory notes or opaque areas identification criteria observed Chrysotile amphiboles Amphibole j F = Single Fiber Amosite Crocidolite Ambiguous a s Bundle (<3 ftiefs <1 fiber diameter apan C = Cluster l>3 Intersecbons] Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identifled NSD = No Structures Detected

CITY_21MC100_002902047

NYC-WTC_000229013