NYC-WTC_000225760

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6191 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm^'

GRID BOX: Magnification: 20,000 GRID Lb: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/24/01

Analysis Performed By: ROMAN. PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 u :>=5p Chrys Amphibole Nonasb Ambig/NO No' Coord <5m Elements)

TC > pg /■(

7^ —

Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance: Positive diffraction patten 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 C M >5u 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 Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002921839

NYC-WTC_000225760