NYC-WTC_000218302

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE V olume (liters): 1920 Lab Group #: 6928 Filter Type / Filter .Area: MCE 385 mm/ Lab Sample #: 13 Grid Opening Size: 0.01 124

Client Sample #: 13 Ai ea Examined: 0.04446 mm-'

GRID BOX: Magnification: 20,000 GRJD ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 ■Analysis Date: 3-4/02

Analysis Performed By: — ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or \ SOS No I'.Nonadb F B C M =5iJ Chrys Amphibole Nonasb Ambig/NC : Elements; : ■No Coord <5p

6 ----------------

Siiuci = > 0.5p >5:1 Aspect Ratio Grid acceptance: 9= 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 overlapped grid squares <5% F ( B j C i M t 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i I AMPHIBOLES Amphibole i I F = Single Fiber Annosite B = Bundle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous T" C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-ldentit'ied I NSD = No Structures Delected

CITY_21MC100_0Ci0466260 NYC-WTC_0002 18302