LAND REVITALIZATION FACT SHEET
IMPROVING URBAN SOILS
Many urban areas are experi-
encing a dramatic increase
in the number of vacant
properties, resulting in the underuse
of significant tracts of land. In an
effort to revitalize these areas, com-
munities are looking to reuse these
properties as locations for green
infrastructure or urban agriculture.
Green infrastructure is a term used
to describe an array of technologies
and practices that use natural plant-
soil systems to enhance environmen-
tal quality and provide utility services
such as reducing stormwater runoff.
Green infrastructure and urban agri-
culture require soil conditions that
support healthy plant growth. How-
ever, urban soils often are severely
compacted, lack sufficient organic
matter and nutrients, contain large
amounts of construction debris, and
may be contaminated, making them
unsuitable for these reuses.
The natural processes that generate
healthy soils are often interrupted in
an urban environment. Development
projects use heavy equipment for
excavation, grading, filling, paving,
and building. These development
activities alter the condition and
characteristics of urban soils and
their suitability for growing vegeta-
tion. The construction of pavements,
bagging and removal of leaves
and grass clippings, and removal of
tree branches prevent the cycling of
organic matter and nutrients back
into the soil. In heavily urbanized
areas such as downtowns, the most
common soil characteristic is com-
paction.
Heavily compacted soils can act like
pavement and not readily absorb
stormwater runoff. Compacted soils
contain less oxygen, water, organic
materials, and microbiological activ-
NEW ENVIRONMENTAL SOLUTIONS
EPA's land revitalization initiatives are producing significant environmen-
tal benefits and helping to transform communities into more sustainable
and livable places. The strategy of encouraging market-driven rede-
velopment of brownfields and other contaminated sites for economic
reuse is proving to be a successful approach at many sites. However,
challenging real estate markets and economic realities can leave
some formerly contaminated properties unused, possibly for a long
time. New approaches are needed to revitalize these sites and protect
human health and the environment.
EPA's Land Revitalization Team is working with communities, states, other
federal agencies, academic institutions, nonprofit organizations, and
the private sector to develop and test new approaches that recognize
valuable reuse alternatives for formerly contaminated properties. Build-
ing green infrastructure to help manage stormwater runoff and floods,
promoting safe soil management to support urban agriculture, and sit-
ing renewable energy on contaminated sites can bring environmental,
ecological, and social benefits to communities. Unlocking the potential
value of these underused properties often requires creativity and close
collaboration with many public and private partners. These projects
can help stabilize communities and spur economic development.
ity than natural soils. Contaminants
that can be found in urban soils
include heavy metals, hydrocarbons,
and industrial chemicals. In older
residential areas, contaminants can
include lead paint residues, asbes-
tos, coal and wood ash deposits,
used motor oil residues, and pesti-
cides. Residential areas will typically
have less compaction and better
quality soils than more heavily urban-
ized areas.
If a community plans to reuse a site
for urban agriculture or green infra-
structure, site soils will need to be
tested to determine its suitability for
growing plants and for potential risks
to human health. If this evaluation
determines that soils are unsuitable
for the site's intended purpose, then
soils will need to be reconditioned
to support plants or contamination
will need to be removed. In general,
the objective is to restore disturbed
urban soils to a condition consistent
with undisturbed soils.
Sites intended for urban agriculture
may need considerable recondition-
ing to grow crops, whereas areas
intended for recreation (parks, play-
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grounds, hiking trails) may only need
moderate soil reconditioning to allow
for vegetation restoration. Urban sites
that will be transformed into natural,
open spaces may need the least
amount of soil reconditioning.
A key to improving urban soil char-
acteristics is that long-term manage-
ment is needed to ensure successful
reconditioning. Soil management is
a dynamic process usually requir-
ing a large initial effort with smaller
sustained efforts to achieve a lasting
beneficial result. Ongoing mainte-
nance (watering, mulching, weed-
ing) is needed to ensure the project
performs as expected. The EPA is
working with communities to deter-
mine best practices and strategies
for improving urban soils.
CLEVELAND GREEN INFRASTRUCTURE PROJECT
The Bellaire Puritas Development
Corporation undertook a project in
2010 to implement green infrastruc-
ture at a vacant parcel located
at West 131 st Street in Cleveland,
Ohio. Water levels in the adjacent
Chevy Branch stream increase
dramatically during and after rain
events due to runoff from impervi-
ous surfaces in the area.
Green infrastructure was seen as
a beneficial reuse at this location
because retaining and infiltrat-
ing stormwater helps to reduce
the volumes of water in the stream
and the associated adverse water
quality impacts. The home and
driveway previously on this site
had been demolished. Testing of
soil conditions by the EPA Office of
Research and Development found
soils compacted and poorly suited
for infiltrating stormwater or growing
plants. Low levels of lead also were
found in the soils.
Restoration activities included physi-
cally loosening the soil, removing
debris, grading to create a swale,
excavation to create a rain garden,
and amending the soil with a mix of
compost, sand, and topsoil. The rain
garden and swale will retain runoff
from the drainage area and reduce
localized flooding in the area. The
soil amendments will allow planting
of the rain garden and swale with
native plants and broadcast seeding
of the remaining portions of the site
using native grasses and flowering
plants.
The restoration work was done by a
private contractor and cost approxi-
mately $13,500. Signage was in-
stalled with information on the Chevy
Branch, native plants, and green
infrastructure. This formerly vacant
parcel will soon be a productive and
educational green space that helps
to protect the surrounding residential
area from flooding.
Site offer demolition.
Partners in this project are the U.S.
EPA, community members, Neigh-
borhood Progress Inc. (NPI), Park-
Works, Inc., Cuyahoga County Soil
and Water Conservation District
(SWCD), Ohio State University, and
the Northeast Ohio Regional Sewer
District (NEORSD). Funding for this
project was provided by NEORSD
and NPI.
MORE INFORMATION:
Visit ERA's green infrastructure website at http://cfpub.epa.qov/npdes/home.cfm?proqram_id = 298
Visit ERA's Land Revitalization program website at http://www.epa.gov/landrevitalization/
United States
Environmental Protection
Agency
Office of Solid Waste and
Emergency Response
(5105T)
EPA 560-F-11-008
April 2011
www.epa.gov/brownfields/
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