Despite these accomplishments, perc levels in 17 sampled apartments still exceeded the NYSDOH residential air guideline of 100 μg/m, and perc levels in 4 sampled apartments exceeded 1,000 μg/m.
This paper focuses on the spatial marginal effects of forests, parks, and fields and estimates spatial hedonic models on a sample of apartment transactions in Helsinki, Finland.
Additionally, individual apartments sampled included mostly those meeting NYC Perc Project household inclusion criteria (i.e., presence of an adult and child residing in the same household for at least 1 year with no other VOC exposures or certain medical conditions), although five sampled apartments included only adult residents.
Because the IPM intervention was conducted at the building level and because cockroach and mouse presence and allergen levels were quantified in a sample of apartments from each building, we used multilevel modeling to account for the resulting correlation among apartments in the same building.
The HPLC analysis was performed on a ThermoFinnigan HPLC machine equipped with auto sampler, column apartment and UV detector for the visual confirmation of the presence of marker compounds in the extract.
In a previous study of water samples from apartments in Italy, Legionella contamination ranged from 22.6% to 30.5% of the samples [ 2, 18]; while the present study had a higher percentage of positive samples (42.9%).
The study used a survey research method where a randomly selected sample of 204 apartment dwellers in 6 neighbourhoods responded to a structured questionnaire.
Investigators from the federal team -- four industrial hygienists, two epidemiologists, one biologist and one laboratory scientist -- collected samples from the apartment and the van, while F.B.I. agents took samples from the warehouse.
The mean monthly rent for a random sample of 60 apartments advertised on Craig's List (a website that lists apartments for rent) is $1000.
"We did do environmental sampling at the apartment and the mail slot, and at this point we don't see any anthrax or anthrax exposure there," Dr. Cohen said.
