TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme (liters): 1936 Lab Group #: 6091 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magiiification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/14/01

Analysis Performed By; MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Stniclure N or EDS Ambig/ND ! (Nonadb No F B C M >=05 p :>=5|j Chr/5 Amphibole NonasD No Coord <5tJ Elements)

- ‘f - 5 - " I.

Struct = > 0.5pt > 5 I Aspect Ratio Grid acceptance: 9 = Positive diffraction pattern properties confomiing to <50% undissolved filter, overlapped or folded Totals laboratory identification crtena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B i C M >5u ■/= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Ch37sotile AMPHIBOLES ~| Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = C,uster(>3 Intersections) Anthophyllite Non-Asbestos T remoiite M = Matrix Non-Identified Actinolite NSD = No Structures Delected

CITY_21MC100_003104764

NYC-WTC_000184197