TEM Asbestos air count sheet with identification criteria, Nov 2001

NYC 9/11 Public Portal Document TEM Asbestos (air) Count Sheet Client Name: = NYC BOE Volume (liters): 1928 | Lab Group #: 5917 Filter Tvpe / Filter Area: MCE 385 mm? Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 7 - Area Examined: 0.04496 mm- GRID BOX: SS D> Magnification: 29 990 GRID ID: ZAC Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/18/01 Analysis Performed By: RY? ROMAN PEYSAKHOV xk GO. Structure | Structure Type Length iD of Structure Nor Nona No Ec M >=05 >=5 Chrys Amphibole Nonasb Ambig/ND ona No Coord} B/C <5u B "Y Elements) %( i ZB TPZ WD | Cae | 4 | 7,D2 (/ fe. 7% Struct = > 0.5 > 5:1 Aspect Ratio Grid acceptance: = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals ! 4 0, laboratory identification criteria observed <10% particulate coverage 50% coverage ate least 20 unfolded or overlapped and squares <5% TF B-. C]M /] >5p V=EDS spectrum conforming to laboratory holes or opaque areas : identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite I : B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous - C = Cluster (>3 intersections) Anthophyllite | Non-Asbestos : . Tremolite \ _ M = Matrix Actinolite Non-Identfied NSD = No Structures Detected NYC-WTC_000185417 CITY_21MC100_003106532