NYC-WTC_000220400

NYC 9/11 Public Portal Document

HiUmann Environmental Group, LLC

SECTION 3-RESULTS

3.1 Temperature, Relative Humidity, Carbon Dioxide, Carbon Monoxide, Volatile Organic Compounds, Hydrogen Sulfide, Oxygen and Combustible Gasses.

Investigation Date: September 15,2001* - Temp CO2 VOCs H,S O2 'TjEL^ . Location 'L- RH • (°F) (ppm) (ppm) (ppm) (ppm) (%) ”66'^7 30% to Target Range S: <1235 <9.0 <0.3 <10 >19.5 <0.1 ■ 76" 60% Lobby 12:02 69° 39% 521 1 LOD LOD 20.7 LOD

Investigation Date: September 21,2001 - Temp CO2 VOCs O2 SY-LE)L;B: Time KH (°F) (ppm) (ppm) (ppm) (ppm) (%) - (%)

e T- ”6717 30% to <1221 <9.0 <0.3 <10 >19.5 <0.1 TargetRange 76“ 60% 24“^ Floor 12:04 78° 54% 950 1 7.4** LOD 20.8 LOD

17* Floor, Near Freight 12:08 77° 53% 1044 2 LOD LOD 21.1 LOD 17* Floor, Capstone 12:11 76° 51% 1007 2 LOD LOD 21.1 LOD Space 11* Floor, Reception of 12:14 78° 69% 878 2 LOD LOD 21.1 LOD Costello, Shea & Gaffney 5* Floor, Empty Space 12:16 76° 61% 771 2 LOD LOD 21.1 LOD

Investigation Date: October 4,2001 COi 'yj;CO/'B iVOGs/ ILS Y7' LEL . Locaian Time SiRHftS ’ (ppm) (ppm) (ppm) (ppm) (%) -iLC%)Y-'

Target Range '7’17 30% to <1232 <9.0 <0.3 <10 >19.5 <0.1 76“ 60% Lobby 14:20 77° 50% 766 LOD LOD LOD 21.1 LOD

Penthouse 14:26 75° 51% 902 LOD LOD LOD 20.9 LOD 17"' Floor, Capstone 14:32 77° 50% 777 LOD LOD LOD 21.1 LOD Group 16"'Floor 14:35 77° 49% 870 LOD LOD LOD 21.1 LOD

9* Floor 14:39 75 48% 835 LOD LOD LOD 21.1 LOD

6* Floor 14:42 75 50% 794 LOD LOD LOD 21.2 LOD

LOD= Measurement was below the Limit of Detection for the method used.

*= Building floors remained closed due to power outages. **= Elevated reading can be attributed to adjacent roofing activities.

Cushman & Wakefield/44 Wall Street, New York, NY/Project Number N3-7476 Page 5

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NYC-WTC_000220407