NYC-WTC_000206690

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: Warren & Panzer Volume (liters): 1800 Lab Group #: 8462 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm- Magnification: GRID BOX: JW 20,000 GRID ID: 3 AC- Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 7/13/88

Analysis Performed By: MARKPEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

/ /4O-

J <^7^ 3

Struct = > 0.5|U > 5:1 Aspect Ratio Grid acceptance: J = 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 C M >5u a/= 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 J

CITY_21MC100_002994116

NYC-WTC_000206690