NYC-WTC_000205493

NYC 9/11 Public Portal Document

US Department of Labor/OSHA WTC Air Sampling Activity AU sampling data with severity >0 excluding all blanks (Including Area and Personal Samples only)

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

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

4/15/02 PI 8942 W8253 Silica, Crystalline P SOUTHWEST BOVIS EROC/Tully, 482 X 0 0.072 0.0144008 Quartz, Respirable Loader operator, Dust north of Liberty St. 4/17/02 PI 9004 W9040 Silica, Crystalline A SOUTHWEST BOVIS AREA, Bovis, 473 X 0 0.072 0.0143293 Quartz, Respirable Vesey and West Dust St., stair into 6WTC. 4/16/02 PI 8980 W7042 Silica, Crystalline P NORTHWEST TURNER DOCKBUILDER Turner/Nicholson, 90 % 0 0.071 0.014295 Quartz, Respirable dockbuilder, Dust drills and removes concrete from WTC6 Bl levels. 4/15/02 PI 8985 W6315 Silica, Crystalline A SOUTHEAST TULLY AREA SAMPLE Tully, AREA, 472 % 0 0.065 0.0129611 Quartz, Respirable maintenance Dust area, east side of pit in manbasket. 4/17/02 PI 9005 W9046 Silica, Crystalline A SOUTHWEST BOVIS Bovis, AREA, 449 X 0 0.063 0.0126206 Quartz, Respirable walkway above Dust West St. above cement breaking. 4/16/02 DI5485 0416RC01 Zinc Oxide Fume P WEST AMEC TORCHCUTTER 463 M 0.0568919 0.057 0.0113784 4/15/02 PI 8983 W6043 Silica, Crystalline A SOUTHEAST TULLY AREA SAMPLE Tully, AREA , 480 % 0 0.056 0.0111111 Quartz, Respirable maintenance Dust area eastside of pit midway between Vesey and Liberty. 4/21/02 P19211 W8712 Silica, Crystalline A NORTHWEST TURNER AREA SAMPLE 485 X 0 0.052 0.0104306 Quartz, Respirable o Dust H 4/20/02 D15572 W8931 Silica, Crystalline P MOYNIHAN MAUREE 425 X 0 0.051 0.0101961 Quartz, Respirable to Dust 4/15/02 P18986 W6311 Silica, Crystalline A WEST AMEC AREA SAMPLE AREA, WTC5, 467 % 0 0.049 0.0098249 Quartz, Respirable near pile bldg 1. o Dust o I o o to co co Monday, April 29, 2002 lVTCSamptingMasterO426. mdb Page 3 of 4

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NYC-WTC_000205495