NYC-WTC_000228575

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): ! 800 Lab Group #: 7479 Filter Type / Filter Area: MCE 3S5 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Stnjcture Type Length ID of Structure Nor V j cDS No i (Nonaao F B C M >=05 p >=5p Chrys Amphibole No Coord <5m ■ Elements)

If -4__

Struct = > 0.5(1 >5:1 Aspect Ratio Grid aaeptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals latxiratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B 1 = EDS spe'^rum conforming to laboratory holes or opaque areas identification critena observed I Cluysotile AMPHIBOLES i Amphibole F - Single Filer Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolitfi M = Matnx I Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002901059

NYC-WTC_000228575