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

NYC 9/11 Public Portal Document Environmental Microbiology Laboratory, Inc. 1800 Sullivan Ave., Suite 209, Daly City, CA 94015 (650) 991-3436 Fax (650) 991-2243 www.enilab.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 • 664412: 664420: 664416: 664424: Outdoors Basement Lobby Second 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) Chenopods Cheno odiaceae) Elm (Ulmus) Eucalyptus, etc. Grass (Poaceae) 4 27 Mulberry Morus) Oak uercus) Other pollen 1 7 Pine, etc. (Pinaceae) 1 7 Poplar, cottonwood (Po ulus) Ragweed, etc. (Asteraceae) Sycamore (Platanus) OTHER PLANT: Algae Diatoms Fern, moss, etc. spores Other (wood, trichomes, etc.) OTHER ANIMAL: Epithelial (skin) cells 230 1,533 249 1,660 179 1,193 161 1,073 Hair Insect parts Mites Nematodes OTHER FUNGI: Hyphal fragments 12 160 3 20 3 20 NONBIOLOGICAL: Fiberglass 34 227 7 47 26 173 5 33 Background debris (1-4+)t 2+ 3+ 3+ 3+ Sample volume (liters) 150 150 150 150 TOTAL PARTICLES/M3 1,954 1,734 1,366 1,126 Interpretation is left to the company and/or persons who conducted the field work. f 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-F indicating the largest amounts. To evaluate dust levels it is important to account for differences in sample volume.

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NYC-WTC 000131028