100 WILLIAM STREET Block: 68 Lot: 36 BIN: 1001116 72-78 John St., 29-35 Platt Street

NYC 9/11 Public Portal Document t nvironmental Microbiology Laboratory, Inc. 1800 Sullivan Ave., Suite 209, Daly City, CA 94015 (650) 991-3436 Fax (650) 991-2243 www.emlab.com Client: Laurence B. Molloy, LLC Date of Sampling: 09-26-2001 C/O: Mr. Laurence Molloy Date of Receipt: 10-04-2001 Re: 100 Williams St., Manhattan Date of Report: 10-15-2001 OTHER BIOLOGICAL PARTICLES REPORT: NON CULTURABLE METHODOLOGY INSTRUMENT USED: Zefon Air-O-Cell volumetric air sampler

Location: 664446: 664462: 664426: Sixteenth floor 664467: Seventeenth floor Eighteenth floor Ninteenth floor raw ct. particles/m3 raw ct. particles/m3 raw ct. particles/m3 raw ct. particles/m3 POLLEN: Acacia, etc. Alder (Alnus) Ash (Fraxinus) Birch (Betula) Cedar/Juniper (Cupressaceae) Cheno ods (Chenopodiaceae) Elm Ulmus Eucalyptus, etc. Grass (Poaceae) Mulberry (Morus) Oak (Quercus) 1 7 Other pollen 1 7 2 13 1 7 Pine, etc. (Pinaceae) Polar, cottonwood (Populus) Ragweed, etc. Asteraceae) S camore Platanus OTHER PLANT: Algae Diatoms Fern, moss, etc. spores Other (wood, trichomes, etc.) 7 47 2 13 6 40 : 3 20 OTHER ANIMAL: Epithelial(skin)cells 562 3,747 788 5,253 633 4,220 1,280 8,533 Hair Insect parts Mites Nematodes OTHER FUNGI: Hyphal fragments i 7 NONBIOLOGICAL: Fiberglass 5 33 8 53 11 73 Background debris (1-4+) 3+ 3+ 3+ 3+ Sample volume (liters) 150 150 150 150 TOTAL PARTICLES/M3 3,847 5,326 j 4,267 8,633 interpretation is left to the company and/or persons who conducted the field work. + Background debris is an indication of the amounts of non biological particulate matter present on the slide (dust in the air) and is graded from I + to 4+ with 4+ indicating the largest amounts. To evaluate dust levels it is important to account for differences in sample volume.

EML ID: 21006; Page 5 of 6

NYC-WTC 000131032