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Indoor Air Quality Field Report, 90 Trinity Place, May 2002

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ATC Associates indoor air quality field report for 90 Trinity Place documenting environmental conditions in May 2002.

NYC-WTC_000180192–000180205
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NYC 9/11 Public Portal Document SUBJECT IO PROTECTIVE ORDER NO. CONFIDENTIAL, SEPT. 2008 CITY_21MC100_003464221 NYC-WTC_000180205 ATC ASSOCIATES, INC. Page 14üi 14 INDOOR AIR QUALITY FIELD REPORT 30 Time: or LOCATION: 20 Trinity Place /HS for Leadership and public services DATE: 5:7-O2 PROJECT NO: 15-19125-0290 Location Occupants Temperature (°F) Relative *Carbonws Humidity Dioxide (%) (ppm) Carbon* aylonoxide a (ppm) Respirable Particulate. s (ug/nl) TVOCS (Ppm) 2ND FL HAIIWAY IST FLOOR STAIRS"À" IST FL LOBBY 15T FLO0R ROM 123 BSMT STAIRWELLA BSMT HALlWAY NeXT JoeleLaroR SOuTHSIRe of GUM. Out Dou uiSineof mam eNTRANCE Ont Doors OUTSiße of SOUTH sine ot ex Out Doors OuTSine of NORTH Sine ot Guideline levels ASHRAE/AIHA O 73.6 73,7 73.9 74.6 12.9 12,6 73.9 80.1 80,3 80,6 68-75°F/winter 73-79 °F/summer 469 491 2 463 486 464 46,5 47.1 47,3 479 44.1 549 2 2 19 516 2 477 479 24 25 88 16 481 2 477 44,6 45.6 30-60% 486 49L Outdoor level 2 2 9ppm 21 20 65 ug/m' 1 ppm +700 ppm Comments: NA The assessed location(s) () Does () Does not meet established indoor air quality guidelines. sipnatrer ee 7tgantane Date: 57-02 -

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NYC-WTC_000180205Source: NYC Law Department, mirrored locally

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