NYC-WTC_000208778

NYC 9/11 Public Portal Document

Liberty Mutual /ATG Industrial Hygiene Air Sample Results December 9,2001

! OSHA PEL Station Sample Begin Begin Comment orACGIH Action ! Type Sample ID Zone Job Description Date End Date Time End Time Worker Analyte Results Units TLV Level

Personal 0111340-WTCBOFA04 BOVIS Torohman 11 /28/2001 11 /28/2001 8:21:00 AM 3:34:00 PM Tony Almeda Chromium <0.00046 mg/cu m O.S 0.26

Cobalt <0.00032 mg/cu m 0.05 0.0025

I Copper <0.000076 mg/cu m 0.1 0.06

Iron 0.0028 mg/cu m 10 5

I Lead <0.00027 mg/cu m 0.05 0.03

Magnesium 0.00086 mg/cu m 15 7.5

Manganese <0.000071 mg/cu m 5 2.5

Nickel <0.00014 mg/cu m 1 0.5

Selenium <0.0025 mg/cu m 0.2 0.1

I Thallium <0.0025 mg/cu m 0.1 0.05

Tin <0.0027 mg/cu m 2 1

Titanium <0,000067 mg/cu m 16 7.5

Vanadium <0,00043 mg/cu m 0.1 0.05

Zinc 0.00053 mg/cu m 5 2.5

Personal 0112009-WTCBORM02 BOWS Spotter 11/30/2001 12/1/2001 6:27:00 PM 3:32:00 AM Joao Tamasio Aluminum <0.0027 mg/cu m 5 2.5

Antimony <0,0032 mg/cu m 0.5 0.2S

Arsenic <0.00068 mg/cu m 0.01 0.005

Beryllium <0.0000013 mg/cu m 0.002 0.001

Cadmium <0.000028 mg/cu m 0,005 0.0025

Calcium 0.041 mg/cu m 5 2.5

Chromium <0.00047 mg/cu m 0.5 0.25

Cobalt <0.00032 mg/cu m 0.05 0.0025

Copper 0.00092 mg/cu m 0.1 0.06 n Iron 0.069 mg/cu m 10 5 H Lead <0.00028 mg/cu m 0.05 g;o3

Magnesium 0.0049 mg/cu m 15 7.5

S Manganese 0.00062 mg/cu m 5 2.5 Q o Nickel <0.00014 mg/cu m 1 0.5

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NYC-WTC_000208779