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 oeC OEL^ % OEL’- OEL’ VV t Area- middle section of 4/4,2002 4/4,2002 3:00:00 <0.012 mg/cu 020404-02 BO ramp top 1:30:00 PM PM Area N/A Cristobalite m 0.05 0.024

WTC-BO<^-S- Area- middle section of 4/4/2002 4/4/2002 9:00:00 <0.012 mg/ou 020404-02 BO ramp top 1:30:00 PM PM Area N/A Quartz m 0.05 0.024 WTC-BQ-CJ-S- Area-middle of bridge E 4/5/2002 4/5/2002 3:40:00 020405-04 BO side hand rail 7:55:00 AM PM Area N/A Respirable Dust 0.064 mg/cu m 3 3 2.13% 2.13%

V7TC-BO-CJ-S- Area-middle of bridge E 4/5/2002 4/5/2002 3:40:00 <0.011 mg/cu 020405-04 BO side hand rail 7:55:00 AM PM Area N/A Cristobalite m 0.05 0.024

WTC-BO-CJ-S- Area-middle of bridge E 4/5/2002 4/5/2002 3:40:00 <0,011 mg/cu 020405-04 BO side hand rail 7:55:00 AM PM Area N/A Quartz m 0.05 0.024

WTC-BO-CJ-S- Top of Ramp 1/2 way 4/6/2002 4/6/2002 3:17:00 <0.012 mg/cu 020406-05 BO Down to Depression 8:05:00 AM PM Area Sample N/A Cristobalite m 0.05 0.024

WTC-BO-CJ-S- Top of Ramp 1/2 way 4/6/2002 4/6/2002 3:17:00 <0.012 mg/cu 020406-05 BO Down to Depression 8:05:00 AM PM Area Sample N/A Quartz m 0.05 0.024

wtc-bo<:j-s- 020406-05 BO WTC-BO-MA-A- 020407-03 BO WTC-BO-MA-M- 020407-02 BO WTC-BO-MA-M- 020407-02 BO WTC-BO-MA-M- 020407-02 BO WTC-BO-MA-M- 020407-02 BO WTC-BO-MA-M- 020407-02 BO WTC-BO-MA-M- 020407-02 BO WTC-BO-MA-M- O 020407-02 BO WTC-BO-MA-M- K I 020407-02 BO M • WTC-BO-MA-M- 020407-02 BO Top of Ramp 1/2 way 4/6/2002 4/6/2002 3:17:00 <0.062 mg/cu Down to Depression 8:05:00 AM PM Area Sample N/A Respirable Oust m 3 3 Spotter on Surface 4/7/2002 4/8/2002 2:35:00 Church & Vesey 7:30:00 PM AM Giovanni Gioia 1/2 NPR Asbestos 0.0052 fibers/oc 0.1 0.05 5.20% 10.40% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 going to depression 8:00:00 PM AM Area N/A Total Dust 0.41 mg/cu m 10 10 4.10% 4.10% Area-middle of bridge 4/7/2002 4/8/2002 3:05.00 going to depression 8:00:00 PM AM Area N/A Calcium 0.054 mg/cu m 2 2 2.70% 2.70% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0,0000081 going to depression 8:00:00 PM AM Area N/A Beryllium mg/cu m 0.002 0.001 0.40% 0.81% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0.0070 mg/cu going to depression 8:00:00 PM AM Area N/A Iron m 5 2.4 0.14% 0.29% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0.00013 mg/cu going to depression 8:00:00 PM AM Area N/A Manganese m 0.2 0.134 0.07% 0.10% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0.0040 mg/cu going to depression 8:00:00 PM AM Area N/A Aluminum m 5 5 0.08% 0.08% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0.0037 mg/cu going to depression 8:00:00 PM AM Area N/A Magnesium m 10 6.7 0.04% 0.06% Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0.00077 mg/cu m 3,4 0.02% 0 02% going to depression 8:00:00 PM AM Area N/A Zinc 5 Area-middle of bridge 4/7/2002 4/8/2002 3:05:00 0.00031 mg/cu going to depression 8:00:00 PM AM Area N/A Titanium m 10 10 0.00% 0.00%

o o I o ’•OEL=Occupational Exposure Limit, the lower of the OSHA PEL or ACGIH TLV, o to 2., Shift Adj. OEL=OEL lowered when appropriate to reflect 12 hour x 7 day a week shifts. cr^ 3.1When the result is not quantifiable a % OEL is not calculated. Page 9 to cn

NYC-WTC_000186567

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NYC-WTC_000186567Source: NYC Law Department, mirrored locally

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