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

NYC 9/11 Public Portal Document L"v'z uuiueuiai iviierontotogy 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 William St., Manhattan Date of Report: 10-15-2001 SPORE TRAP REPORT: NON-VIABLE METHODOLOGY Instrument Used: Zefon Air-O-Cell volumetric air sampler Location: 664412: 664420: 664416: 664424: Outdoors Basement Lobby Second floor Comments (see below) None None None None raw et. spores/m3 raw ct. spores/rn3 raw ct. spores/m3 raw ct. spores/m3 Alternaria 8 53 2 13 6 40 1 7 Arthrinium Ascospores* 31 207 4 27 16 107 1 7 Aureobasidium Basidiospores* 164 1,093 84 560 96 640 136 907 Beltrania 1 7 Bipolaris/Drechslera group Cercospora 1 7 4 27 Chaetomium 1 7 Cladosporium 380 2,533 216 1,440 120 800 24 160 Curvularia 4 27 Epicoccum 18 120 1 7 Nigrospora 6 40 1 7 Oidium 1 7 Other brown 1 7 Other colorless 23 153 Penicillium/Aspergillus types 40 267 72 480 32 213 12 80 Pestalotiopsis 1 7 Pithomyces 1 7 1 7 1 7 Polythrincium 1 7 Rusts* 1 7 Scopulariopsis Smuts*, Periconia, Myxomycetes* 2 13 9 60 Stachybotrys chartarum (atra) Stemphylium Ulocladium Zygomycetes Background debris (I -4+)ff 4+ 3+ 3+ 3+ Sample volume (liters) 150 150 150 I50 TOTAL SPORES/M3 4,548 2,548 1,901 1,168 Comments: * Most of these spore types are not seen with culturable methods (Andersen sampling), although some may appear as non-sporulating fungi. Most of the basidiospores are "mushroom" spores while the rusts and smuts are plant pathogens. t The spores of Aspergillits and Penicillium (and others such as Acremonium. Paecilomvvices ) are small and round with very few distinguishing characteristics. They cannot be differentiated by non-viable sampling methods. Also, some species with very small spores are easily missed, and may be undercounted. ft Background debris is an indication of the amount of non-biological particulate matter present on the slide (dust in the air) and is graded from 1+ to 4+ with 4+ indicating the largest amounts. To evaluate dust levels it is important to account for differences in sample volume. This background material is also an indication of visibility for the analyst and resultant difficulty in reading the slide. For example, high background debris may obscure small spores such as the Penicillium/Aspergillus group. Counts from areas with 4+ background debris should be regarded as minimum counts and may actually be higher than reported. EML ID: 21006, Page I of 6

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