Geoscience Reference
In-Depth Information
Fig. 10.5
Lucas County fields: a 1 mile buffer around permitted fields
the application site. Individual site reports vary by WWTP but often include the size
of the field, gallons or dry tons applied to the field, percent solids of the biosolids,
owner name, and location of the site.
The application information depicts the amount of application by year, geo-
graphic region, and amount of historical application (Table
10.4
). The fields that have
received biosolids between 1990 and 2003 are shown in Figs.
10.5
(Lucas County),
10.7
(Wood County) and
10.9
(Greene County). Once all of the data has been added,
maps of the applications can be produced specifically showing the application rate
of heavy metals and nutrients from the biosolids.
10.4.4 Address Generation for Epidemiological Study
The ability to look at spatial relationships was integral to the epidemiological por-
tion of the project. The epidemiology study focused on potential health effects of
residents in each county in relation to the households distance from a permitted or
applied field. Households were selected to receive a mailed survey based on the
distance of the house from permitted fields (Wood and Lucas Counties) or from
applied fields (Greene County). A list of all households in Wood County by distance
from permitted fields was created using the developed permitted fields shapefile. A
