NYC-WTC_000211252

NYC 9/11 Public Portal Document TEM Asbestos (air) Count Sheet Client Name: NYC BOE Lab Group #: 8147 Lab Sample #: 4 Client Sample #: 4 GRID BOX: (LHe GRID ID: TLE # Grid Openings: 4 Volume (liters): 1840 Filter Type/ Filter Area: MCE 385 mm? Grid Opening Size: 0.01124 Area Examined: 0.04496 mm? Magnification: 20,000 Accelerating Voltage: 100 KeV Analysis Date: 6/17/02 Analysis Performed By: la ROMAN PEYSAKHOV _ GO. _| Structure | Structure Type Length ID of Structure Nor V con No F CIM] >=05u >= h Amphibole | Nonasb | AmbgiND ona ES No = oord Ln) B <5 Su Chrys Elements) GY 2S “ue g P2) 4 7 tT Struct = > 0.Sp > 5:1 Aspect Ratio Grid acceptance: = Positive diffraction patter properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50° coverage ate least 20 unfolded or overlapped grid squares <5% FiB/]CI[M] >5p = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile | Pen | ’ AMPHIBOLES | Amphibole F = Single Fiber Amosite ; B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos - agates Tremolite . M = Matrix Actinolite Non-Identified NSD = No Structures Detected NYC-WTC_000211252 CITY_21MC100_002863816