NYC-WTC_000212483

NYC 9/11 Public Portal Document

TCM Asbestos (air) Count Sheet Client Name: N YC BOE Volume (liters): 1920 Lab Group #: 7490 Filter Type / Filter Area: MCE 385 mm‘ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV i/ Grid Openings: 4 Analysis Date: 4/21/02

Analysis Performed By: MARK PEYSAKHOV

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

4

Struct = > 0 5n > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern ampertes conformirxi to <50% undissolved filter, overlapped or folded Totals aboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5p / = EDS spectrum conforming tci laboratory holes or opaque areas dentification cnteria observed Chrysotile AMPHIBOLES Amphibole - - Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber dia meter apart Crocidolite Ambiguous 3 = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite i VI = Matrix Non-Identified Actinolite 'ISD = No Structures Detected

CITY_21MC100_002866685

NYC-WTC_000212483