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

Machine-extracted title · confidence 95%

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

Air Sampling Data For 04/05/02 to 04/12/02 WTC Recovery Project

Begin Shift Adj. % Shift Adj Sample IO Zone Job Description Time End Time Worker Respirator Analyte Results oel’ OEL^ % oel’ OEL’ w I C-Bu4;j-A- Area<iepression under 4/4/2002 4/4/2002 5:41:00 0204044)3 BO ramp by scaffold 8:04:00 AM PM Area N/A Asbestos 0.010 fibers/cc 0.1 0.05 10.00% 20.00% WTC-BO4)J-A- Area-under ramp to 4/5/2002 4/5/2002 3:27:00 0204054)3 BO depression 7:35:00 AM PM Area N/A Asbestos 0.0072 fibers/cc 0.1 0.05 7.20% 14.40% WTC-BO4)J-A- Under Ramp in 4/6/2002 4/6/2002 3:15:00 0204064)3 BO Depression Center 8:04:00 AM PM Area Sample N/A Asbestos 0.0064 fibers/cc 0.1 0.05 6.40% 12.80%

WTC-BOCJ-H- Top of Ramp to 4/6/2002 4ffi/2002 3:14:00 Hydrogen 0204064)2 BO Depression Guard Booth 7:58:00 AM PM Area Sample Sulfide <0.041 ppm 10 10

WTC-BO-CJ-H- Top of Ramp to 4/6/2002 4/6/2002 3:14:00 020406-02 BO Depression Guard Booth 7:58:00 AM PM Area Sample Sulfur Dioxide <0.010 ppm 2 2 WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0.0015 mg/cu 020404-03 BO ramp 8:03:00 AM PM Area N/A Lead m 0.05 0.024 2.96% 6.17% WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0,0012 mg/cu 020404-03 BO ramp 8:08:00 AM PM Area N/A Chromium m 0.5 0.024 0.24% 4.96% WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0.0000090 020404-03 BO ramp 8:08:00 AM PM Area N/A Beryllium mg/cu m 0.002 0.001 0,45% 0.90% VI/TC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0.0092 mg/ou 020404-03 BO ramp 8:08:00 AM PM Area N/A Calcium m 2 2 0.46% 0.46% WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0.00060 mg/ou 0204044)3 BO ramp 8:03:00 AM PM Area N/A Copper m 0.2 0.134 0.30% 0.45% WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0.0090 mg/cu 020404-03 BO ramp 8:08:00 AM PM Area N/A Iron m 5 2.4 0,16% 0.37% WTC-BO4)J-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0000087 0204044)3 BO ramp 8:03:00 AM PM Area N/A Manganese mg/ou m 0.2 0.134 0.04% 0.06% WTC-BO4)J-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0.0019 mg/cu 020404-03 BO ramp 8:08:00 AM PM Area N/A Zino m 5 3.4 0.04% 0.06% WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 0,0015 mg/cu 020404-03 BO ramp 8:08:00 AM PM Area N/A Magnesium m 10 6.7 0.01% 0.02%

WTC-BOCJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 <0.0027 mg/ou 0204044)3 BO ramp 8:08:00 AM PM Area N/A Aluminum m 5 5 WTC-BO4)J-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 <0.0033 mg/ou 0204044)3 BO ramp 8:08:00 AM PM Area N/A Antimony m 0.5 0.024

WrC-80-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 <0.00069 0204044)3 BO ramp 8:08:00 AM PM Area N/A Arsenio mg/cu m 0.01 0.0048 I 31 to WTC-BO-CJ-M- Area-middle section of 4/4/2002 4/4/2002 3:12:00 <0.000028 0204044)3 BO ramp 8:08:00 AM PM Area N/A Cadmium mg/ou m 0.002 0.001 Ri § I ’ OEL=Occupational Exposure Limit, the lower of the OSHA PEL or ACGIH TLV. s' ’ Shift Adj. OEL=OEL lowered when appropriate to reflect 12 hour x 7 day a week shifts. s. ’ when the result is not quantifiable a % OEL is not calculated. Page 5 to

NYC-WTC_000186563

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NYC-WTC_000186563Source: NYC Law Department, mirrored locally

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