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NYC-WTC_000218056

Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000218056
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NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ’Q44 1 NT’C BOE Volume (liters): Lab Group #: 6840 Filter Type Z Filter Area: MCE ; Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.0449b mm-

GRID BOX: Mavnifieation; 20,000 GRID ID: Accelerating Voltage: iOO KeV # Grid Openings: 4 Analysis Date: 2 2^'02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length iD 0! Structure N or V ' js No F B C M >=05 u i ■=5m Chrys : Amohibole i Nonasb ; Afnbig/ND~i No Coord <5p cieTier::!

.3 3^

Struct = >0.5u >5:1 Aspect Ratio Grid acceptance: N= 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 unlolded or overlapped grid squares <5% F I B ( M \'= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole ; F = oingle Fiber Amosite B -• Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous j C - Cluster (>3 Intersections) Anthophyllite , Non-Asbestos i Tremolite M = Matrix Actinolite Non-Identified ■ NSD = No Structures Detected

CITY_21MC100_000465807 NYC-WTC_0002 18056

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NYC-WTC_000218056Source: NYC Law Department, mirrored locally

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Laboratory report documenting transmission electron microscopy analysis of an air sample collected from a New York City Board of Education site on November 8, 2001.

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