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.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

L7Location:

caca, etc. Alder (Alnus) 664423: Eleventh floor raw ct. particles/m3 Ad ra 484546: Fourteenth floor raw ct. particles/ m3 664421: Fifteenth floor raw ct. particles/m3

Ash (Fraxinus) Birch (Betula) Cedar/Juniper (Cupressaceae) Chenopods Cheno odiaceae) Elm (Ulmus) Eucalyptus, etc. Grass (Poaceae) Mulberry (Morus) Oak (Quercus) Other pollen Pine, etc. (Pinaceae) Poplar, cottonwood (Populus) Ragweed, etc. (Asteraceae) Sycamore (Platanus) OTHER PLANT: Algae Diatoms Fern, moss, etc. spores Other (wood, trichomes, etc.) 16 107 2 13 2 13 OTHER ANIMAL: Epithelial(skin)cells 1,880 12,533 3,500 23,333 365 2,433 61 407 Hair Insect parts Mites Nematodes OTHER FUNGI: Hyphal fragments 5 33 2 13 NONBIOLOGICAL: Fiberglass 5 33 24 160 2 13 1 7 Background ddebris (1-4+) 3+ 3+ 2+ 1+ Sample volume (liters) 150 150 150 150 TOTAL PARTICLES1M3 12,566 23,633 2,472 427 Interpretation is left to the company and/or persons who conducted the field work. t 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 4 of 6

NYC-WTC 000131031