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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/^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 oeU OEL*^ % oel’ OEL*^

WTC-BO-M.K-M- Area-middle sf ramp 4/7/2002 4/7/2002 3:33:00 <:u.uuu070 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Manganese mg/cu m 0.2 0.134

WTC-BO-MK-M- Area-middle of ramp 4/7/2002 4/7/2002 3:33:00 <0.00013 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Nickel mg/cu m 1.5 0.72

WTC-BO-MK-M- Area-middle of ramp 4/7/2002 4/7/2002 3:33:00 <0.0024 mg/cu 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Selenium m 0.2 0.134

WTC-BO-MK-M- Area-middle of ramp 4/7/2002 4/7/2002 3:33:00 <0.0024 mg/cu 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Thallium m 0.1 0.048

WTC-BO-MK-M- Area-middle of ramp 4/7/2002 4/7/2002 3:33:00 <0.0026 mg/ou 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Tin m 2 0.96

WTC-BO-MK-M- Area-middle of ramp 4/7/2002 4/7/2002 3:33:00 <0.00042 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Vanadium mg/cu m 0.05 0.05

WTC-BO-MK-M- Area-middle of ramp 4/7/2002 4/7/2002 3:33:00 <0.000096 020407-02 BO walkway, handrail 8:07:00 AM PM Area N/A Zinc mg/cu m 5 3.4

WTC-BO-MK-S- Area-middle of the ramp, 4/7/2002 4/7/2002 3:29.00 <0.011 mg/cu 020407-02 BO walkway handtail 7:50:00 AM PM Area N/A Cristobalite m 0.05 0.024

WTC-BO-MK-S- Area-middle of the ramp, 4/7/2002 4/7/2002 3:29:00 <0.011 mg/cu 020407-02 BO walkway handrail 7:50:00 AM PM Area N/A Quartz m 0.05 0.024

WTC-BO-MK-S- Area-middle of the tamp, 4/7/2002 4/7/2002 3:29:00 <0.057 mg/cu 020407-02 BO walkway handtail 7:50:00 AM PM Area N/A Respirable Dust m 3 3 WTC-BO-RF-M- Area-WTC 5 LvI Bl 4/7/2002 4/7/2002 3:16:00 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Total Dust 1.9 mg/ou m 10 10 19.38% 19.38% WTC-BO-RF-M- Area-WTC 5 Lvi Bl 4/7/2002 4/7/2002 3:16:00 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Calcium 0.32 mg/cu m 2 2 15.95% 15.95% W/TC-BO-RF-M- Area-WTC 5 Lvi Bl 4/7/2002 4/7/2002 3:16:00 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Manganese 0.017 mg/cu m 0.2 0.134 8.65% 12.92% WTC-BO-RF-M- Area-WTC 5 Lvt Bl 4/7/2002 4/7/2002 3:16:00 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Iron 0.091 mg/cu m 5 2.4 1.81% 3.77% O Vl/TC-BO-RF-M- Area-WTC 5 Lvi Bl 4/7/2002 3:16:00 4/7/2002 H 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Magnesium 0.086 mg/cu m 10 6.7 0.66% 1.28% K WTC-BO-RF-M- Area-WTC 5 Lvi B1 4/7/2002 4/7/2002 3:16:00 0.0000086 I to 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Beryllium mg/cu m 0.002 0.001 0.43% 0.86% WTC-BO-RF-M- Area-WTC 5 Lvi Bl 4/7/2002 4/7/2002 3:16:00 0.00095 mg/cu 020407-03 BO welding work zone 8:10:00 AM PM Area N/A Copper m 0.2 0.134 0.48% 0.71% o o I ^■OEL=OccupationaI Exposure Limit, the lower of the OSHA PEL or ACGIH TLV. o o 2., to Shift Adj. OEL=OEL lowered when appropriate to reflect 12 hour x 7 day a week shifts. 3-1When the result is not quantifiable a % OEL is not calculated. Page 13 to wa wa

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