NYC-WTC_000222594

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE X’oliiine (liters): 1832 Lab Group #: 7539 Filter Type 1 ilter Area: MCE 385 mm^ Lab Sample #: 7 Grid f r . iiinq Size: 0.01124

Client Sample #: 10 Are I Examined: 0.04496 mm^

GRID BOX: Mamiitication: 20,000 GRID ID: Accelei Ci ring Voltage: 100 KeV # Grid Openings: 4 Art.ilvsis Date: 4/25/02

Analysis Performed By: MARK PE'i'SAKHOV

i GO. Structure Structure Type Length ID of i iructure N or 7 EDS (Nonadb No - F B : C M >=05 M ; -5|j Chrys Amphib .• Nonasb Ambig/ND i No ; Coord <5m Elements)

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance;

A- Positive diffraction pattern properties conforncng to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% , F B C M >5p •7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenred -oiile AMPHIBOLES ibole F = Single Fiber Amosite Crocidolite :'.iiius B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Anthophyllite N. •.•sios Tremolite M = Matrix No:; il'ied Actinolite NSD = No Structures Detected

CITY_21MC100_002918225

NYC-WTC_000222594