ERI has developed an excellent reputation in this field, especially in wastewater treatment wetland and other passive systems.
Representative Wastewater Treatment System Projects:
A. Design and Construction of Pilot Wetland Treatment System, Frankfort Springs,
Pennsylvania. ERI designed this pilot system to polish leachate from a flyash landfill.
B. Constructed a Residential Wastewater Treatment Plant, Wexford, Pennsylvania.
ERI constructed an elaborate self-contained septic system which included septic tanks, an
equalization tank, a sand filter system, a chlorination system and associated alarms.
C. Planted a Passive Wetland Treatment System, Springdale, Pennsylvania. ERI planted a system
that utilized cattails and bulrush for treatment of mine drainage and landfill leachate. Plantings had to
be done in 4 feet of muck. A special floating platform was built from which to install the plants.
D. Designed a Wastewater Treatment Wetland System to Treat Hog Waste, Evansville, Indiana.
Hog farmers have had continual pressure from government agencies to eliminate waste discharges
from their farms. We designed a system that would solve these problems using natural
decomposition of the waste products.
E. Constructed a Passive Wetland Treatment System, Powdermill Nature Reserve, Pennsylvania.
This system utilizes 8 basins, each with its own unique treatment scheme. Some basins are
wetlands while others are settling basins or alkaline producing systems. This system treats mine
drainage.
F. Phytoremediation, Hazardous Waste Site, Salisbury, Maryland. 12,000 Cottonwood and Willow
trees were planted to help control groundwater at this site. We installed an irrigation system to aid in
the establishment of the plantings.
G. Designed and Built a Passive Landfill Leachate Treatment System, Morgantown, West Virginia.
The system utilized wetland filtration, an anaerobic alkaline producing system and a wetland polisher.
H. Phytoremediation at a former manufactured gas facility in Rochester,
New Hampshire. ERI installed Poplar and Willow species to help treat contaminated groundwater.
I. Passive treatment of acid mine drainage, Shasta County California.
ERI designed a highflow passive system to treat contaminated drainage from a copper mine.
J. Phytoremediation Cap using native grasses and forbs, Barberton, Ohio. ERI designed, conducted
pilot studies and provided construction supervision of the phyto-capping of hundreds of acres of spoil
from glass manufacturing.
