Awards and Client Recognition
Sevenson is an award-winning prime contractor with a proven record of safely and successfully completing challenging remedial construction and environmental dredging projects. Since our first award in 1983, Sevenson continues to earn significant industry accolades and client recognition.
2024
2024 Excellence in Environmental Engineering and Science™ Awards
Grand Prize – Industrial Waste Practice
NW Natural Gas Interceptor Trench Remediation Project
Portland, OR
Presented To: Aponowich, Driscoll & Associates, Inc. with Sevenson Environmental Services, Inc. (Contractor/Operator)
Presented By: American Academy of Environmental Engineers Scientists
ADA and Sevenson Environmental Services (contractor) have been working on the NW Natural Gas site in Portland Oregon since 2008 on an extensive remediation project, removing pollutants from the site being discharged into the Willamette River via groundwater.
In 2020 and 2021, it was determined that the groundwater flow patterns had changed over 8 years of operation. Additional measures were necessary to prevent this groundwater source from reaching the river. This groundwater showed much higher pollutant levels than existing flows. A new pretreatment system was required to collect and treat the so-called “Interceptor Trench” groundwater. The new system would then be tied into the existing Pretreatment Plant and ultimately pumped to the Main Treatment Plant for further treatment and final discharge.
Key Takeaways from the project are:
- Alternative air stripping methods were not deemed to be feasible due to the iron fouling which would occur.
- While diffused-air type air strippers are relatively rare and their performance not extensively documented, the Interceptor Trench unit has shown that, properly designed, a diffused air system can produce remarkable organics removal results, even with high solids in the wastewater.
- The iron in the groundwater was oxidized effectively and used as a no-cost method of removing heavy metals.
- The higher-than predicted removal of semi-volatile PAHs in the diffused-air unit has doubled the life of the liquid phase activated carbon system downstream.
- Since the Interceptor Trench project was commissioned, it has intercepted and successfully treated over 150 million gallons of polluted groundwater.
- The plant discharge to the Willamette River has continually met the NPDES standards, many of which are below drinking water standards. The NPDES permit limits are summarized in a following section.
Sevenson presented USACE NE District’s Bunker Hill Award
In recognition of the remediation work conducted to date at the Raymark Superfund site, Stratford, Connecticut, Sevenson’s Project Team was presented with the Bunker Hill Award by the USACE New England District. The team’s professionalism and dedication to the project and surrounding community has garnered the trust of project stakeholders and the public. Sevenson’s efforts contributed to making the community a safer and cleaner place by removing approximately 100,000 cubic yards of contaminated soils from the 28 properties within the town as well as nearby Ferry Creek.
The U.S. Environmental Protection Agency’s Region 1 New England Regional Administrator, David W. Cash, was joined by members of the Connecticut Congressional delegation, the U.S. Army Corps of Engineers, the Connecticut Department of Energy and Environmental Protection, the Mayor of Stratford, and local community members to highlight the significant progress made at the site through funding from the Bipartisan Infrastructure Law. The officials toured the remediated properties and participated in a roundtable conversation with local community members to discuss the positive impacts that the cleanup has had on the town. A ceremonial removal of a Public Health Advisory sign which had been posted decades ago to warn against exposure to Raymark contamination in the upstream portion of Ferry Creek but is no longer needed since this portion of the creek has been cleaned up.
“This unprecedented funding from the Bipartisan Infrastructure Law has allowed EPA and its partners to deliver on our promise to protect the community from legacy contamination, as well as cleanup and restore land for reuse in Stratford,” said EPA New England Regional Administrator David W. Cash. “Though there’s still a long road ahead of us, we’re looking forward to continuing full steam ahead, restoring additional properties and bringing the Raymark cleanup to completion.”
Bipartisan Infrastructure Law funding for the Stratford, Connecticut site propelled the cleanup forward, thus far EPA and its partners have been able to complete the following activities:
- More than 100,000 cubic yards of contamination excavated and removed.
- 28 properties remediated and restored, including 12 active businesses.
- 2,000 LF of sediment from Ferry Creek was mechanically removed and currently being restored to its natural habitat by planting wetland seed, live stakes, and ~1,000 trees and shrubs.
- Over 10,000 air samples were collected from 9 monitoring stations to confirm the air remained safe.
- Provided 30 to 50 jobs each workday including engineers, scientists, machine operators, laborers and truck drivers.
SAME Philadelphia Post’s 2024 Sustaining Member Firm of the Year Award
Sevenson Environmental Services Inc. has been a SAME Philadelphia Post Sustaining Member since 1993 and is honored to be the recipient of the post’s 2024 Sustaining Member Firm of the Year Award.
For more than 40 years Sevenson’s Federal Program has successfully worked with the USEPA, USACE, NAVFAC, and DOE. Working closely together, Sevenson and our partners in the SAME Network have collaborated to address difficult design and construction issues at several of the most sensitive and complex Superfund sites in the United States, many of which fall under USACE Philadelphia’s purview.
Sevenson has proudly supported the Philadelphia Post throughout its 30+ years of membership. It has been the “Tournament Sponsor” for the Annual SAME Philadelphia Post Liberty Golf Classic for many years and has even won the tournament a time or two. Sevenson has also been an active supporter of the DCHWS Conference that the Philadelphia Post hosts since its inception.
BUFFALO NEWS NAMES SEVENSON ENVIRONMENTAL SERVICES, INC. A WINNER OF THE METRO BUFFALO TOP WORKPLACES 2024 AWARD
Sevenson Environmental Services, Inc. has been awarded a Top Workplaces 2024 honor by The Buffalo News Top Workplaces. This list is based solely on employee feedback gathered through a third-party survey administered by employee engagement technology partner Energage, LLC. The confidential survey uniquely measures the employee experience and its component themes, including employees feeling Respected & Supported, Enabled to Grow, and Empowered to Execute, to name a few.
2023
2023 WEDA Safety Award
Presented to: Pledger Creek Remediation Project
Presented by: Western Dredging Association
2023 WEDA “Dredger on Deck” Award
Presented to: Mr. Wayne Kostuk – General Superintendent
Presented by: Western Dredging Association
2022
ERC Award for Safety Excellence – Vallejo MGP Project
Presented by: Pacific Gas and Electric Company
2021
Meritorious Service Award for Former DuPont Chambers Works FUSRAP Site
Presented by: DOE Legacy Management
Project Delivery Team of the Year Award for Excellence for Former DuPont Chambers Works FUSRAP Site
Presented by: USACE HQ
Sevenson Successfully Renews Gold Shovel Standard Certification
Sevenson Environmental Services, Inc. has successfully renewed their Gold Shovel Standard Certification for 2021. Gold Shovel Standard Certification is a widely-recognized indication of increased safety awareness and a commitment to continuous damage prevention improvement. Excavators within Gold Shovel Standard rely on Gold Shovel Standard technology to measure safety and efficacy and are able to present hard data to support their reputation.
2020
Sevenson Successfully Renews Gold Shovel Standard Certification
Sevenson Environmental Services, Inc. has successfully renewed their Gold Shovel Standard Certification for 2020. Gold Shovel Standard Certification is a widely-recognized indication of increased safety awareness and a commitment to continuous damage prevention improvement. Excavators within Gold Shovel Standard rely on Gold Shovel Standard technology to measure safety and efficacy and are able to present hard data to support their reputation.
2019
2019 Environmental Excellence Award for the Zephyr Refinery: Fire Suppression Ditch Project
Presented by: Western Dredging Association
2018
2018 Environmental Excellence Award for the Wagner Creek and Seybold Canal Restoration Project
Presented by: Western Dredging Association
2018 Annual Safety Excellence Award for the Flint River Sediment Remediation Former MGP Site
Presented by: Western Dredging Association
2017
WEDA Environmental Excellence Award for Environmental Dredging
Presented by: Western Dredging Association
Award of Merit
Presented by: New Jersey Department of Labor & Workforce Department’s Division of Public Safety & Health
Governor’s Award for Continued Excellence
Presented by: State of New Jersey Governor’s Occupational Safety and Health Awards Program
2016
2012
Certificate of Recognition
Presented by: Cecil County, Maryland; Department of Public Works
Liberty from Accidents Award
Presented by: USACE, Philadelphia District
2011
National Notable Achievement Award for Superfund Reuse/Revitalization
Presented by: USEPA Region 2
2010
Project of the Year Award – Delaware Section
Presented by: American Society of Civil Engineers
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