NYC-WTC_000201563

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCBOE Volume (liters): 1840 Lab Group #: 7503 Filter Type / Filter Area: MCE 385 Lab Sample #: / Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 i.mirf Magnification: GRID BOX: ."'i 20,000 GRID ID: # Grid Openings: 4 3K Accelerating Voltage: Analysis Date: 100 KeV 4/22/02

Analysis Performed By: ROMAN PE YSAKHOV

GO. Structure Structure Type Length ID of Structure N or T EDS (Nonadb No F B C ! M >=05 pi. Chrys Amphibole Nonasb Ambig/ND No I' Coord Elements) <5p

zrz /Efe If

Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

7= EDS spectrum conforming to laboratory least 20 unfolded or ovedapped grid squares <5% F B ; c M >5p holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B ^-Bundle {<3 fibers <1 fiber diameter apart Crocidolite Am,biguous C = Cluster (>3 intersections) j' Anthophyllite Non-Asbestos ) Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

NYC-WTC_000201569