NYC-WTC_000199812

z z o o io TABLE 20. SUMMARY OF RESULTS OF TRANSMISSION ELECTRON MICROSCOPY ANALYSES I o m c o FOR ASBESTOS IN DUST AND DEBRIS CT o o' co ■D CD 00 250 SOUTH END AVENUE, NEW YORK CITY o cn 3. ro 03

STRUCTURES GREATER THAN 0.5 MICROMETER o o o c 3 Concentration CD o Approximate Number of of Dispersal Volume Analytical Collection Type of Asbestos Asbestos Sample Volume Filtered Sensitivity Area Asbestos Structures Structures mL mL structures/cm’ cm’ Detected on Surface structures/cm’

Sample 250SEA-1OD-D 1,9/18/01 Chrysotile 70 300000 Apartment lOD, Betlroom 111 100 1.0 4230 Amphibole 0 <13000 Top of Cupboard with Glass Doors 41- (A) Debris Collected by Toothbrush Total 70 300000

Sample 250SEA-I0D-D1. 9/18/01 Chrysotile 111 270000 Apartment lOD, Bedroom Amphibole <7200 1677 500 0.3 2400 0 Top of Cupboard with Glass Doors (B) Follow-up Wipe Sample Total 111 270000

Sample 250SEA-10D-D2, 9/18/01 Chrysotile 190 350000 Apartment 1OD, Living Room <5500 870 100 0.3 1830 Amphibole 0 High Boy Side Table (A) Debris Collected by Toothbrush Total 190 350000

Sample 250SEA-I0D-D2, 9/18/01 Chrysotile 203 640000 o Apartment lOD, Living Room 2523 500 0.3 3160 Amphibole 0 <9500 H High Boy Side Table (B) Follow-up Wipe Sample Total 203 640000 I—i s o o o I o o

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