NYC-WTC_000228951

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7778 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size; 0.01! 24

Client Sample #; 10 Area Examined: 0,044% mrrt-

GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings; 4 Analysis Date: 5/18/02

Analysis Performed By; =»» MARK PEYSAKHOV

GO, Structure Structure Type Length IO of Structure Nor V EDS J

No (Noradb F 0 c M >=05 (J >=5|j Cfirys Nonasb Elements) No Coord <5u

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‘ Struct ~ > 0.5(1 > 5; 1 Aspect Ratio Grid acceptance: = Positive diffraction pattern properties conforming to <50% undissclved filter, overtapped or folded Totals Isboratory ider.bfication erteria observed <10% paittculate coverage >50% coverage ate least 20 unfolded or owertapped grid squares <5% F B C M >50 = EDS spectrum canfarming to laboratory boles Of opepue areas idenffreation criteria observed Chiysotile amphiboles Amphibole F = Single Fiber Amosite e = Bundle (<3 Stets <1 fiber diameter apart Crocidolite Ambiguous ! C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos T Tremolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_002901953

NYC-WTC_000228951