NYC-WTC_000208263

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group tf: 8828 Filter Type / Filter Area: MCC 385 mm- LabSamnl^: 9 Grid Opening Size: 0.01124 Client Samtjie #: 09 Area Examined: 0.04496 mm- GRID BOX: Magnifieation: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/10/02

Analysis Perl) rmed By: MARK PEYSAKHOV

GO Structure Structu-e Type Length ID of Structure \ or 1 £DS No ^^ 3 C M vbTCT i =5p Chrys Amphibole Nonasb । Ambiq/ND 1 iNonaub No Coord I <5p I Elements)

------- CLS A

Struct = 0,5 u Aspect Ratio Grid acceptance

c= Positive diffraction pattern properties confornr g to <50% undissoived filter, overlapped or foiaed Totals laboratory identification criteria observed <:0% particulate coverage >50°'o coverage ate least 20 unfoideo or overiaoped grid sduares <5% \= EDS spectrum conforming to laboratory I F 1 B j C ■ M . >bu holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole i F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite I-------------------- Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003021270

NYC-WTC_000208263