WTC Air Sampling Data, Apr-May 2002

NYC 9/11 Public Portal Document

atc/^J^SL Air Sampling Data For 04-26-02 to 05-10-02 WTC Recovery Project

Begin Respira Shift Adj. % Shift Adj Sample ID Zone Job Description Time End Time Worker tor Analyte Results oel’ OEL’^ HOEL*^ OEL*^ WTCAM-MA-S- spottar on struoturs @ 6 4/302002 5/1/2002 2:50:00 Richard 02043003 AM WTC LvI B2 7:40:00 PM AM Carino 1/2 NPR Quartz 0.24mg/cu m 0.05 0.024 474.00% 987.50% WTC-AM-MA-S- spotter on structure @ 6 4/302002 5/1/2002 2:50:00 Richard 02043003 AM WTC LvI B2 7:40:00 PM AM Carino 1/2 NPR Respitable Dust 0.75 mg/cu m 3 3 25.03% 25.03% WTC-AM-MA-S- spotter on stnjcture @ 6 5/2/2002 5/3/2002 3:00:00 Stanislav 02050202 AM WTC LvI Bl 7:45:00 PM AM Shalomov 1/2 NPR Respirable Dust 0.14 mg/cu m 3 3 4.62% 4.62% WTC-AM-MAO- spotter on structure @ 6 4/30/2002 5/1/2002 2:50:00 Richard <0.012 mg/cu 02043003 AM WTC LvI B2 7:40:00 PM AM Carino 1/2 NPR Cristobalite m 0.05 0.024 WTC-AM-MA-S- spotter on stnjcture @ 6 5/2/2002 5n/2002 3:00:00 Stanislav <0.012 mg/cu 02050202 AM WTC LvI Bl 7:45:00 PM AM Shalomov 1/2 NPR Cristobalite m 0.05 0.024 WTC-AM-MA-S- spotter on stnjcture @ 6 5/3/2002 3:00:00 Stanislav <0.012 mg/cu 02050202 AM WTC LvI Bl 7^"00°?M AM Shalomov 1/2 NPR Quartz m 0.05 0.024

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to S o o o I o ’ OEL=Occupational Exposure Umit, the lower of the OSHA PEL or ACGIH TLV. o to 2.1 Shift Adj. OEL=OEL lowered when appropriate to reflect 12 hour x 7 day a week shifts. SiWhen the result is not quantifiable a % OEL is not calculated. Pagel

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