NYC-WTC_000228667

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7576 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV Analysis Date: 4/29/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure Nor v EOS I No >=05 (J i>=51J (Nonadb j F B C M Chrys Amphibole Nonasb Ambig/ND _ No Coord Elements) | <5m

/rs 1 1

'1

Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance: >/= Positive ciffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification cnteria observed least 20 unfolded or overlapped grid squares <5% F B I C M ; '/= EDS speiarum conforming to laborator/ holes or opaque areas ---- 1---- identification criteria observed Chrysotile amphiboles Amphibole F = Single Finer Amosite ) Crocidolite Ambiguous I B : Bundle (<3 fibers <1 fiber diameter apart 4- C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ! i Tremolite M = Matrix Actinolite Non-Identified tt NSD = No Siructures Detected

CITY_21MC100_002901280

NYC-WTC_000228667