TEM Asbestos air count sheet, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEMAsbestosJairLCount Sheet ClientName: NYC BOE Volume (liters): I 808 Lab Group #: 6887 FilterJTyjde7 Filter^Mea2 MCE 385 mm- Lab Sample #: 9 Grid Opening Size: U.Ol 124

Client Sample #: 12 Area Examined: (>04496 rnm-

GRID BOX: Magnification: 20.000 GJLID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3 102

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M >=05 p ■=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elemenis)

Z ■<. -J- 1 — . ------------- --------------- -------------- > ----- 1------------------------- .|------- j--------

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

0= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5u 8= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber i ! Amosite B = Bundle («3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ’remolite M = Matrix i Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102186

NYC-WTC_000183157