OSHA Silica Air Sampling Data, WTC Site, April 2002

NYC 9/11 Public Portal Document

US D^artment ofLabor/OSHA WTCAir ^mpling Activity

All sampling data with severity >0 excluding aU blanks (Including Area and Personal Samples only)

From 4/15/2002 To 4/21/2002 ; sorted by severity

Date Sample ANALYTE TASK/ Sampled LAB # Submission ft DESCRIPTION Type Area Location OPERATION Description TIME UOM RESULT TWA SEVERITY

4/21/02 PI9210 W392g Silica, Crystalline A SOUTHEAST TULLY Cement Chipping WTC 6 497 % 18 3.4 6.8670849 Quartz, Respirable Dust 4/21/02 DI5565 W8927 Silica, Crystalline A OTHER WTC Area Sample Filled w/ 486 % 8.7 1.3 1.3597263 Quartz, Respirable water Dust 4/21/02 DI 5568 W8906 Silica, Crystalline A OTHER WTC Area Sample Pier 26-So. 490 % 10 0.67 0.8071326 Quartz, Respirable Dust 4/21/02 DI 5564 W8719 Silica, Crystalline A OTHER WTC Area Sample Pier 26-No. 190 % 49 0.13 0.6588945 Quartz, Respirable Dust 4/15/02 PI8944 S875 Silica, Crystalline P SOUTHWEST BOVIS EROC, Grappler 452 % 12 0.34 0.4734513 Quartz, Respirable Operator,north of Dust Liberty st, sorting area. 4/20/02 PI3197 W6332 Silica, Crystalline A WEST AMEC 365 % 32 0.11 0.3715259 Quartz, Respirable Dust 4/21/02 PI9207 W9025 Slilca, Crystalline A NUKlHVVtSl lUKNtK AREA SAMPLt 475 % O.io 0.3059543 Quartz, Respirable Dust 4/20/02 P19196 W6317 Silica, Crystalline P NORTHWEST TURNER 419 % 22 0.074 0.1766027 Quartz, Respirable Dust 4/16/02 P18981 W2607 Silica, Crystalline P NORTHWEST TURNER DOCKBUILDER Tumer/NIcholson, 440 % 8.6 0.15 0.1606061 Quartz, Respirable WTC6. driller. Dust drills concrete and removes It from B1 levels of o WTC. 4/16/02 DI5487 0416RC03 Lead, Inorganic (as Pb) P WEST AMEC 454 M 0.00746 0.0075 0.1492 K 4/16/02 PI8977 0416KF02 Sulfuric Acid P NORTHWEST TURNER NY FIRE FDNY, raking 504 M 0.11 0.11 0.11 I DEPARTMENT spreadout debris south of bldg. 6 pile. o 4/16/02 PI8976 0416KF01 Sulfuric Add P NORTHWEST TURNER NY FIRE FDNY, raking 477 M 0.063 0.063 0.063 o DEPARTMENT debris south of I o Bldg.6 pile. 4/16/02 DI 5488 0416RC04 Copper Fume (as Cu) P WEST AMEC TORCHCUTTER 450 M 0.0055494 0.0055 0.055494 o Monday, April 29,2002 IVTCSamplingMasterO426. mdb Page 1 of 4 it.

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