NYC-WTC_000228792

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volnme (liters): 1800 Lab Group#: 7656 Filter Type / Filter Area: MCE 385 mm’ Tab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/6/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or 7 EDS No Ambig/NC iNonadb F B C M >=05 M :>=5iJ Chrys Ampftiboe Nona sb Nq Coord <5p Elements)

21 2.

_______ _____ L_l__ Struct = > 0.5p > 5;f Aspect Ratio Grid acceptance: '/= Positive diffracfiofl pattern Brapertie,5 conforming to <50% undissoSwed filter, overlapped or folded Totals labo'atcfy tdentification criteiia observed <10% partiouiate coverage >50% coverage ale least 20 unfoWed or overlapped grid squares <S% F B C eOS spectrum conforming to laboratory holes or opaque areas i denSfication crtterta observed Chrysotile amphiboles Amphibole F = Single Fiber Amcaite B = Bundle (<3 fibers <1 fiber diameter apart CrocWottte Ambiguous C = Cluster (>3 Intersect'Ons) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected I _ i

CITY_21MC1OO_OO29O1694

NYC-WTC_000228792