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NAWE has extensive experience in designing simple, low-cost, ecological systems to drive specific treatment reactions for our industrial clients. Our engineered wetland systems, in-situ phyto- and bioremediation systems and engineered soil-matrix biofilters help our customers achieve exceptional business and environmental results. NAWE's industrial clients fall into the following sectors.
Remediation
NAWE provides a full range of services to restore contaminated environments-from scoping and initial assessment through complete design, permitting, construction observation, system startup and operations. Our project teams conducts environmental investigations to identify, design, and implement cost-effective, ecological remedial actions that work. Our environmental investigation and remediation services include bioremediation; brownfields evaluation; remedial investigations, feasibility studies, and design.
We provide specialty design services for industrial clients for a number of groundwater remediation projects including; remediation of BTEX, MTBE, and TCE groundwater plumes, removal of phosphorus, and abatement of blast furnace slag leachate seeps. In addition, NAWE has expertise in hydraulic modeling of surface flow and mass transport processes in both saturated and variably saturated systems. NAWE also provides design assistance for air sparging and phytoremediation systems. In addition, NAWE has expertise in numerical modeling of subsurface flow and mass transport processes in both saturated and variably saturated systems.
NAWE's technological advances have opened new opportunities for constructed wetland treatment systems to be used in the remediation of petroleum-contaminated sites. NAWE has successfully designed cold-climate wetland treatment systems using Forced Bed Aeration™ that are now being operated for year-round biological treatment of petroleum hydrocarbons, enabling a simple low-cost solution for a complex, long-term problem.
British Petroleum (Casper, Wyoming)
The wetland system designed by NAWE for British Petroleum in Casper, Wyoming can handle flows up to 3 million gallons of BTEX and MTBE-contaminated groundwater per day. Due to land availability challenges, the wetland was designed to blend into the middle of a premier Robert Trent Jones golf course, and will be able to operate for over 100 years with low operations and maintenance (O&M) costs. NAWE was involved in all stages for the British Petroleum project, including feasibility assessment, pilot design and testing, full-scale design, permitting, and construction observation, system startup, and operator training.
The NAWE British Petroleum project was awarded the distinguished "Grand Award" from the American Council of Engineering Companies (ACEC) and winner of the 2005 "7 Wonders of Engineering Award" from Minnesota Society of Professional Engineering (MSPE).
ARCO Refinery (Wellsville, New York)
An oil refinery once operated on land currently home to the State University of New York's Wellsville campus, posed a critical environmental issue for the health and safety of students and residents in the surrounding area. As a result of the refinery's practices, the groundwater was contaminated with hydrocarbons, metals, and chlorinated solvents. NAWE designed a passive wetland system as a long-term solution to treat 280,000 gallons per day of contaminated groundwater for the former ARCO Refinery. The design incorporates an upgrade of the adjacent rails to trails path, restoration of the adjacent river swale, and a 20-acre site plan restoration plan that utilizes entirely native plants (trees, shrubs, wildflowers, grasses and wetland plants). NAWE's engineered wetland system provided an ecologically based, low maintenance, long term solution that turned a challenging problem into a community amenity.
Williams Pipeline (Watertown, South Dakota)
NAWE provided design, permitting, construction, and planting services for a one-acre wetland remediation system for Williams Pipeline in Watertown, South Dakota. The wetland is designed with Forced Bed Aeration™ to allow on-site remediation of a variety of waste streams, including petroleum contact water, ethanol-contaminated stormwater, and tank bottoms. Due to the success of this facility, Williams Pipeline renegotiated their permits in North and South Dakota to allow transport of waste fluids from other facilities for processing at the NAWE-designed wetland treatment system. The constructed wetland treats wastewater to meet South Dakota discharge standards and consistently meets effluent limitations. This system is featured as a case study in the reference textbook Wetlands and Remediation II, published by Battelle Press in 2002.
Learn more
Feature article: Clean again, naturally
Feature article: Remediation, Marathon Style
Feature article: Constructed wetlands are changing the face of petroleum remediation
Feature technical publication: BTEX Degradation in a cold-climate wetland system
Feature technical publication: Onsite Remediation of Petroleum Contact Waste
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