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WTC OSHA Asbestos Sampling Data for A2 Permisissible Exposure Limit (PEL): 0.1 fiber/cubic centimeter as an 8-hr time weighted average. Excursion Limit: 1 fiber/cubic centimeter over a 30-minute period. DATE Location # of Samples Sample Type Fibers /cc 9/15 West & Vesey Streets to Hot Zone 1 Personal 0.0014 9/15 West & Vesey Streets to Hot Zone 1 Personal 0.022 9/15 MIA Area at AMX bldg & WTC6 1 Personal 0.003 9/16 West & Barclay Streets 1 Personal 0.006 9/16 World Financial Center at Vesey to Chambers 1 Personal 0.009 DATE Location # Samples Sample Type Fibers /cc TEM fibers/cc 9/17 West & Vesey to WTC1 to WTC6 3 Personal <0.004-0.007 none DATE Location Sample Type Fibers/cc TEM fibers/cc 9/18 Light Post at West-Barclay Area 0.034 none 9/18 Bldg 4 to WFC Annex-Food Ct Area 0.069 none 9/18 Bldg 4 to WFC Annex-Food Ct Area 0.027 none 9/18 WFC4 to foot bridge to Boat Area Area 0.012 none 9/18 West & Vesey to AMX Bldg Area 0.014 none 9/18 West & Vesey to Albany & Greenwich Personal 0.027 none 9/18 West & Vesey to Albany & Greenwich Personal 0.021 none 9/18 West Broadway to Murray & West Personal 0.040 none 9/19 NE corner Greenwich & Park Area 0.009 <0.005 9/19 NE corner Barclay & West Area 0.018 <0.006 9/19 West & Vesey (Toll Booth) Area 0.007 <0.005 9/19 Murray to Barclay to PS89 to West & Chambers to Liberty Personal 0.009 <0.003 9/20 West St & Barclay (SW corner) Area 0.005   9/20 Corner Vesey & West (toll booth ) Area 0.008 <0.004 9/21 Employee holding/cutting steel in rubble pile Personal overloaded   9/21 Crane Operator Personal 0.015 <0.009 9/21 In bucket burning over the rubble pile Personal overloaded <0.007 9/21 Crane Operator in Cab Personal <0.005   9/21 Crane Operator Personal 0.086 <0.009 9/21 Off Beam @ Hot Zone Bulk ND   9/21 Dust from Hole Bulk <1% Chrysotile   9/21 North perimeter of pile at West to Greenwich-Church & Vesey Personal 0.014 <0.006 9/21 North perimeter of pile at West to Greenwich-Church & Vesey Personal 0.015 0.015 9/21 North perimeter of pile at West to Greenwich-Church & Vesey Personal 0.01 <0.007 9/21 North perimeter of pile at West to Greenwich-Church & Vesey Personal <0.019   9/21 North perimeter of pile at West to Greenwich-Church & Vesey Personal 0.018 <0.006 9/21 North perimeter of pile at West to Greenwich-Church & Vesey Personal <0.010   9/23 Bobcat operator NW corner between Tower 1-Bldg 6 Personal 0.114 <0.010 9/23 Walking through hot zone Personal 0.009 <0.003 DATE [Sample#] Location/task Sample Type Duration (mins) Fibers/cc TEM (f/cc) 9/26 WTC #1 top of the pile Grappler Operator (Hot Zone) Personal 160 0.03   9/26 Winter Garden rubble pile (Hot Zone) Personal 275 0.045   9/26 WTC#1 to Winter Garden (Hot Zone) Personal 345 0.068

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