Asbestos air sampling data log, World Trade Center, Apr 2002

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Data log of asbestos air sampling results collected at the World Trade Center site between April 4 and April 12, 2002.

NYC-WTC_000186563–000186575

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NYC 9/11 Public Portal Document

ATC/^MutS. Air Sampling Data For 04/05/02 to 04/12/02

WTC Recovery Project

Begin Shift Adj. % Shift Adj Sample ID Zone Job Description Time End Time Worker Respirator Analyte Results oel’ OEL*^ % oel’ oel’ Area-WTC 5 ,B2, WTC-BO-RF-S- mechanical room, 4/7/2002 4/7/2002 3:05:00 <0.012 mg/cu 020407-03 BO demolition action 7:55:00 AM PM Area rVA Cristobalite m 0.05 0.024 WTC-BO-RM-A- Flagger @ Chruch a 4/6/2002 4/7/2002 2:37:00 <0.0028 020406-03 BO Liberty 7:20:00 PM AM Ismael Mendez No NPR Observed Asbestos fibers/cc 0.1 0.05

WTC-BO-RM-A- 4/6/2002 4/7/2002 2:40:00 020406-04 BO Spotter on Surface 4WTC 7:23:00 PM AM Richard Troy None Asbestos 0.0042 fibers/cc 0.1 0.05 4.20% 8.40%

WTC-BO-RM-G- Spotter on Surface 4/6/2002 4/7/2002 2:50:00 <0.00023 O2O4O6-O2P BO Church a Vesey 7:35:00 PM AM Giovanni Gioia No NPR Observed Mercury mg/cu m 0.025 0.017

WTC-BO-RM-G- Spotter on Surface 4/6/2002 4/7/2002 2:50:00 <0.00023 020406-O2V BO Church a Vesey 7:35:00 PM AM Giovanni Gioia No NPR Observed Mercury mg/cu m 0.025 0.017

WTC-BO-RM-H- Area-West a Vesey next 4/5/2002 4/6/2002 2:55:00 Hydrogen 020405-02 BO to Verizon Bldg 7:37:00 PM AM Area N/A Sulfide <0.058 ppm 10 10 WTC-BO-RM-H- Area-West a Vesey next 4/5/2002 4/6/2002 2:55:00 020405-02 BO to Verizon Bldg 7:37:00 PM AM Area N/A Sulfur Dioxide <0.011 ppm 2 2

WTC-BO-RM-H- 4/6/2002 4/7/2002 2:52:00 020406-02 BO Church & Vesey 7:37:00 PM AM Area Sample Sulfur Dioxide 0.058 ppm 2 2 2.89% 2.89% WTC-BO-RM-H- 4/6/2002 4/7/2002 2:52:00 Hydrogen 020406-02 BO Church a Vesey 7:37:00 PM AM Area Sample Sulfide <0.041 ppm 10 10

WTC-BO-RM-M- Spotter on Surface 4/2/2002 4/3/2002 2:32:00 020402-03 BO Church a Liberty Street 7:20:00 PM AM Ismael Mendez No NPR Observed Total Dust 0.22 mg/cu m 10 10 2.15% 2.15%

WTC-BO-RM-M- Spotter on Surface 4/2/2002 4/3/2002 2:32:00 020402-03 BO Church a Liberty Street 7:20:00 PM AM Ismael Mendez No NPR Observed Calcium 0.017 mg/cu m 2 2 0.84% 0.84%

WTC-BO-RM-M- Spotter on Surface 4/2/2002 4/3/2002 2:32:00 0.0099 mg/cu 020402-03 BO Church a Liberty Street 7:20:00 PM AM Ismael Mendez No NPR Observed Iron m 5 2.4 0.20% 0.41%

WTC-BO-RM-M- Spotter on Surface 4/2/2002 4/3/2002 2:32:00 0.00047 mg/cu 020402-03 BO Church a Liberty Street 7:20:00 PM AM Ismael Mendez No NPR Observed Copper m 0.2 0.134 0.23% 0.35%

WTC-BO-RM-M- Spotter on Surface 4/2Z2002 4/3/2002 2:32:00 0.00010 mg/cu O 020402-03 BO Church a Liberty Street 7:20:00 PM AM Ismael Mendez No NPR Observed Manganese m 0.2 0.134 0.05% 0.08% H- WTC-BO-RM-M- Spotter on Surface 4/2/2002 4/3/2002 2:32:00 0.0032 mg/cu 020402-03 BO Church a Liberty Street 7:20:00 PM AM Ismael Mendez No NPR Observed Magnesium m 10 6.7 0.03% 0.05% S O o o I o ’ OEL=Occupational Exposure Limit, the lower of the OSHA PEL or ACGIH TLV. o Shift Adj. OEL=OEL lowered when appropriate to reflect 12 hour x 7 day a week shifts. cn When the result is not quantifiable a % OEL is not calculated. Pagels co o

NYC-WTC_000186573

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NYC-WTC_000186573Source: NYC Law Department, mirrored locally

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