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

ATcr^KSa 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*

WTC-BO-MA-M- Area-middle of hndge 4./7/2002 4«/2002 3:05:00 <0,0032 mg/cu 020407-02 BO going to depression 8:00:00 PM AM Area WA Antimony m 0.5 0.024

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.00068 020407-02 BO going to depression 8:00:00 PM AM Area N/A Arsenic mg/cu m 0.01 0.0048

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.000028 020407-02 BO going to depression 8:00:00 PM AM Area N/A Cadmium mg/cu m 0.002 0,001

WTC-BO-MA-M- Area-middle of bridge 40^/2002 4/8/2002 3:06:00 <0.00047 020407-02 BO going to depression 8:00:00 PM AM Area N/A Chromium mg/cu m 0.5 0.024

VI/TC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.00032 020407-02 BO going to depression 8:00:00 PM AM Area N/A Cobalt mg/cu m 0.02 0.01

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.000077 020407-02 BO going to depression 8:00:00 PM AM Area N/A Copper mg/cu m 0.2 0.134

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.00028 020407-02 BO going to depression 8:00:00 PM AM Area N/A Lead mg/cu m 0.05 0.024

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05.00 <0.00014 020407-02 BO going to depression 8:00:00 PM AM Area N/A Nickel mg/cu m 1,5 0.72

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.0025 mg/cu 020407-02 BO going to depression 8:00:00 PM AM Area N/A Selenium m 0.2 0.134

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.0025 mg/cu 020407-02 BO going to depression 8:00:00 PM AM Area N/A Thallium m 0.1 0.048

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.0028 mg/cu 020407-02 BO going to depression 8:00:00 PM AM Area N/A Tin m 2 0.96

WTC-BO-MA-M- Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 <0.00044 020407-02 BO going to depression 8:00:00 PM AM Area N/A Vanadium mg/cu m 0.05 0.05 WTC-BO-MA-M- flagger @ Church & 4/7/2002 4/8/2002 2:50.00 020407-04 BO Liberty St. 7:40:00 PM AM Ismael Mendez 1/2 NPR Total Dust 0.17 mg/cu m 10 10 1.65% 1.65% O WTC-BOMA-M- flagger @ Church & 4/7/2002 4/8/2002 2:50:00 0.0000077 020407-04 BO Liberty St. 7:40:00 PM AM Ismael Mendez 1/2 NPR Beryllium mg/cu m 0.002 0.001 0.39% 0.77% I Vl/TC-BO-MA-M- flagger @ Church & 4/7/2002 4/8/2002 2:50:00 020407-04 BO Liberty St. 7:40:00 PM AM Ismael Mendez 1/2 NPR Calcium 0.014 mg/cu m 2 2 0.69% 0.69% WTC-BO-MA-M- flagger @ Church & 4/7/2002 4/8/2002 2:50:00 0.0050 mg/cu 020407-04 BO Liberty St. 7:40:00 PM AM Ismael Mendez 1/2 NPR Iron m 5 2.4 0.10% 0.21% o o I o OEL=Occupational Exposure Limit, the lower of the OSHA PEL or ACGIH TLV. o 2., Shift Adj. OEL=OEL lowered when appropriate to reflect 12 hour x 7 day a week shifts. cn 3lWhen the result is not quantifiable a % OEL is not calculated. Page 10 to

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NYC-WTC_000186568Source: NYC Law Department, mirrored locally

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