NYC-WTC_000216478

NYC 9/11 Public Portal Document

TEAf Asbestos (air) Count Sheet -f Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6791 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 21 Grid Opening Size: 0.01124

Client Sample #: 21 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 ~GRIDID:~~ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. • Structure Structure Type Length ID of Structure Norv EDS No >=05 M (Nonadb F 8 C M Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elemenls)

3^ CL

Struct = > O.Sp .> 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 ate least 20 unfolded or overiapped grid squares <5% F B C M >5|j = EDS spectrum conforming’ to laboratory holes or opaque areas identification criteria observed- Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) , Anthophyllite Non-Asbestos T remoiite ' IVl = Matrix Non-Identified Actinolite ___ NSD = No Structures Detected

CITY_21MC100_002877067

NYC-WTC_000216478