Geoscience Reference
In-Depth Information
Fig. 10.4
Permitted fields in Oregon, Ohio showing the OEPA number and letter designations
After the original list of permitted fields was created for Wood County the
database was continually updated in an attempt to include new permitted fields.
Subsequently, the Wood County methodology was followed to develop the permit-
ted field shape file for the other counties. The permitted fields for Wood, Lucas and
Greene Counties respectively are show in Figs.
10.5
,
10.6
and
10.9
. The epidemi-
ological study for Wood and Lucas Counties was performed using permitted fields
only (Khuder et al.
2007
).
10.4.3 Mapping Biosolids Applications
Not all fields that are permitted to receive biosolids actually have biosolids applied.
Therefore, the epidemiological study in Wood and Lucas Counties had a potential
confounding factor if permitted fields did not have biosolids applied to them. For
Greene County, fields with known biosolids applications were used in the epidemio-
logical study. Paper copies of submitted biosolids application reports were obtained
through the Northwest District Office of OEPA for Lucas and Wood Counties and
from the Dayton WWTP and sludge hauler for Greene County. Data were hand
entered into data tables and joined to the parcel layer in the GIS using the parcel
ID as the unique identifier. WWTPs are required to keep application reports as Part
II of most NPDES permits issued to POTW and include detailed information about
