OSHA Silica Air Sampling Data, WTC Site, April 2002

NYC 9/11 Public Portal Document

US Department of Labor/OSHA IVTC Air Sampling Activity All sampling data with severity >0 excluding all 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# DESCRIPTION Type Area Location OPERATiON Description TIME, UOM RESULT TWA SEVERITY

4/15/02 PI8943 W8251 Silica, Crystalline P SOUTHWEST BOVIS EROCZTully, 457 X 0 0.24 0.0489606 Quartz, Respirable Grappler Dust operator, north of Liberty st, sorting area. 4/20/02 DI 5571 W8930 Silica, Crystalline P MOYNIHAN MAUREE 430 X 0 0.24 0.0482252 Quartz, Respirable Dust 4/16/02 DI5487 0416RC03 Copper Fume (as Cu) P WEST AMEC 454 M 0.003646 0.0036 0.03646 4/16/02 DI 5487 0416RC03 Iron Oxide Fume P WEST AMEC 454 M 0.3430459 0.34 0.0343046 4/19/02 DI5542 0419JS01 Copper Fume (as Cu) P SOUTHEAST TULLY 430 M 0.0034238 0.0034 0.034238 4/16/02 DI5485 0416RC01 Copper Fume (as Cu) P WEST AMEC TORCHCUTTER 463 M 0.0030238 0.003 0.030238 4/16/02 DI5485 0416RC01 Iron Oxide Fume P WEST AMEC TORCHCUTTER 463 M 0.2874423 0.29 0.0287442 4/16/02 DI5486 0416RC02 Iron Oxide Fume P WEST AMEC TORCHCUTTER 456 M 0.2582629 0.26 0.0258263 4/16/02 PI8979 W2329 Silica, Crystalline P NORTHWEST TURNER AREA SAMPLE Turner, AREA, 507 % 0 0.12 0.0239916 Quartz, Respirable WTC6, Dust 4/16/02 DI5488 0416RC04 Iron Oxide Fume P WEST AMEC TORCHCUTTER 450 M 0.2182828 0.22 0.0218283 4/15/02 PI8987 W6057 Silica, Crystalline A WEST AMEC AREA SAMPLE AMEC, AREA, 327 % 0 0.099 0.0197877 Quartz, Respirable WTC5, grappler Dust closest to pile at Bldg6 4/17/02 PI 9003 W8840 Silica, Crystalline A SOUTHWEST BOVIS Bovis, AREA, 451 X 0 0.094 0.0187818 Quartz, Respirable Upper walk. Dust West St, above cement breaking, WTC1. 4/17/02 PI9002 W8774 Silica, Crystalline A SOUTHWEST BOVIS Tully, AREA, 453 X 0 0.088 0.0176600 o Quartz, Respirable union trailers Dust fence, overiooking to machine parking area, over WTC5. 4/20/02 DI5570 W8916 Silica, Crystalline P MOYNIHAN MAUREE 430 X 0 0.087 0.0173807 o Quartz, Respirable o Dust I Silica, Crystalline A SOUTHWEST BOVIS Bovis, West 461 X 0 0.072 0.0144613 o 4/17/02 P19001 W8770 Quartz, Respirable Command Post, Dust Fire. o Monday, Apr^^ 2002 fVTCSamplingMasterO42^l^b Page cn K.

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