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The standard control procedure SEF staff uses
to ensure the correct project site is covered is to conduct a three-stage
site confirmation process.
- The first step is to compile pertinent map
data. For this step we use aerial photographs, assessor maps,
topographic maps, soils maps and NWI maps. The subject property
is located and identified on the maps.
- The second stage is to field verify the
subject property location based on step number one and make appropriate
adjustments as necessary. The field inventory and analysis is
conducted as part of the field location verification stage. The
field data is recorded either manually or electronically and tied
to a known control point.
- The third step involves correlating the
field data to a base map and reconciling the data with the maps
compiled in step number one. The boundaries of the study area
and the acreage covered can be calculated and compared to the
database created by this process. If discrepancies arise, then
information is reviewed to determine if additional field verification
is required.
All members of the project staff are familiar with field data
gathering techniques and the interpretation of aerial photos and
maps. These steps ensure that the appropriate area is studied
and the maps produced accurately reflect the area. These steps
are followed for all of our inventory and delineation projects
and has proven to be effective and highly accurate. Federal, state
and local agencies that typically review the delineation and mitigation
documents prepared for permits have been satisfied with the accuracy
of our work.
Ensuring the accuracy of the field data (soils
and vegetation identification and hydrologic information) is critical
and based on agency review of our work, we have consistently provided
professional and accurate data for our projects. The location of
data sampling points is maintained using the field techniques described
above.
Soil samples are collected and field analyzed
using the Munsell evaluation system. The soils sample information
is compared to existing soils mapping and NWI mapping. The identified
soil types are compared to the vegetation data and the field notes
to ensure consistency.
Vegetation species are identified and dominance
is determined in the field and recorded on data forms. Any exotic
or unique species that are not common to the area are noted and
a sample is taken for more detailed analysis if necessary. Samples
and recorded descriptions are compared to plant species identifications
in the National Wetland Plant List to determine plant status. SEF
wetland specialist, Ron Bruce, consults with Dr. Ben Fawver regarding
specific plant taxonomy questions. A record of the locations of
the sampling sites is maintained in the event that additional field
verification is required. These data gathering techniques are used
for all of our wetland inventory projects.
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