NYC-WTC_000218310

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1 920 Lab Group 6940 Filter Type Filter Area: MCE 28 Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examiiiecl: 0.04496 mm-

GRID BOX: Ma»nilieation: 20.000 GRID ID: Accelerating Voltage: 100 Ke\ # Grid Openings: 4 Analysis Date: 3/5/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID ol Structure N or v EDS No (Nonadb F B C M >=05 p Chrys AmphiDole j Nonasc I Ambia,'ND Nc Coord <5p Elements!

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory Identification criteria observed <10% particulate coverage >50% coverage ale least 20 unlolded or overlapped grid squares <5% I F I B 1 C ; M I ■/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole I F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apan Crocidolite ■Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Actinolite Non-ldentified I NSC = No Structures Detected

CITY_21MClCI0_000466277 NYC-WTC_0002 18310